The theory of change Lewin is a framework used to analyze and understand how a certain change can be achieved in a given situation.
The theory of change Lewin was developed by Kurt Lewin, a social psychologist who studied how to bring about change in organizations and communities. The theory explains that any change process involves three main stages: unfreezing, changing, and refreezing.
Unfreezing is when people become aware that change is necessary and are willing to let go of old habits and beliefs. Changing is the actual implementation of new behaviors and practices. Refreezing is when the new behaviors become the norm and are reinforced to ensure sustainability.
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A tiger has a momentum of 1000 kg-m/s. If the tiger has a mass of 315 kg, what is the speed of the tiger?
Answer: Trust I been here before the answer is 24 speed
Explanation:
3. A lightbulb 500 J of energy is transferred to a lightbulb. 350 J is transferred as heat. The rest is transferred as light. Calculate the efficiency of the bulb.
The efficiency of a bulb can be calculated as the ratio of the useful energy output (in this case, the light energy) to the total energy input. In this scenario, the useful energy output is 500 J - 350 J = 150 J, and the total energy input is 500 J. So, the efficiency can be calculated as:
Efficiency = (useful energy output) / (total energy input) = (150 J) / (500 J) = 0.3 or 30%.
This means that 30% of the energy input was converted into useful light energy, while 70% was converted into heat. This is the efficiency of the bulb.
Two solid spheres, both of radius 5 cm, carry identical total charges of 2 μC. Sphere A is a good conductor. Sphere B is an insulator, and its charge is distributed uniformly throughout its volume. How do the magnitudes of the electric fields they separately create at radius 4 cm compare? a. EA=EB>0
b. EA>EB=0
c. EB>EA=0
d. 0
e. EA>EB>0
Two solid spheres with identical charge imbalance of 2 C have radii of 5 cm each. A is an excellent conductor, or sphere A. As an insulator, sphere B's charge is dispersed evenly throughout its volume.
A charge is what?
the sum of money required to purchase something, particularly a service: levy/impose/experience a fee You will be charged if you don't cancel the reservation within the allotted time. the cost of sb/sth Do kids pay anything or are they admitted free minimal or modest charge For this service, we charge a small fee.
What does charge mean in physics and chemistry?
August 8, 2017 update. Charge often refers to electric charge in chemistry and physics, which is a conserved feature of some subatomic particles that governs their electromagnetic interaction. An electromagnetic field exerts a force on matter as a result of the physical attribute of charge.
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The following statements are all true. Which one counts as an "exception to the rule" in being unusual for our solar system? a) Venus does not have a moon. b) Jupiter has a very small axis tilt. c) The diameter of Earth's Moon is about 1/4 that of Earth. d) Saturn has no solid surface.
Venus does not have a moon in being unusual for our solar system.
What is the solar ?Solar energy is an abundant, renewable resource of energy that is generated by the sun's radiation. It can be used to generate electricity, to heat and cool buildings, and to provide hot water. Solar energy is clean, sustainable, and cost-effective, making it an increasingly attractive option for homeowners and businesses alike. Solar energy is captured in photovoltaic (PV) cells, which convert sunlight into electricity. Solar panels can also be used to heat water in solar thermal systems. Additionally, solar energy can be used to heat and cool buildings, through a process called passive solar heating and cooling.
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Venus does not have a moon in being unusual for our solar system.
What is the solar ?Solar energy is an abundant, renewable resource of energy that is generated by the sun's radiation. It can be used to generate electricity, to heat and cool buildings, and to provide hot water.
Solar energy is clean, sustainable, and cost-effective, making it an increasingly attractive option for homeowners and businesses alike. Solar energy is captured in photovoltaic (PV) cells, which convert sunlight into electricity. Solar panels can also be used to heat water in solar thermal systems. Additionally, solar energy can be used to heat and cool buildings, through a process called passive solar heating and cooling.
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What is 36 degrees celsius in fahrenheit?
Answer:
Below
Explanation:
Conversion Formula :
F =9/5 C + 32
9/5 (36) + 32 = 96.8 °F
On what factors does the capacitance of a parallel plate capacitors depend ?APotential difference across the platesBCharge on the platesCArea of the platesDBoth a and b are correct
Factors on which the capacitance of a parallel plate capacitor depends are option (C) and (D) i.e. Area of the plates, and both (a) and (b) are correct.
The capacitance of a parallel plate capacitor depends on the area of the plates and the distance between them. It is given by the formula:
C = ε0 * A / d
where C is the capacitance in farads, ε0 is the permittivity of free space (a constant), A is the area of the plates in square meters, and d is the distance between the plates in meters.
Therefore, statement (C) "Area of the plates" is correct.
Additionally, the capacitance is directly proportional to the permittivity of the material between the plates (ε), which can be influenced by the type of material and any dielectric material placed between the plates. The capacitance is also indirectly proportional to the distance between the plates, so it can be affected by any changes in the spacing between the plates.
Therefore, statement (D) "Both a and b are correct" is also true, as the capacitance can also be influenced by the potential difference across the plates and the charge on the plates, which affect the electric field between the plates and the energy stored in the capacitor.
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Stored energy that can be used to do work is called ________ energy,
"Stored energy that can be used to do work is called potential energy."
Energy comes in a variety of forms and enables us to carry out our tasks. Energy is often transferred from one form to another, and can also be lost as heat.
Energy that is stored is called potential energy. Energy that can be stored and used later is known as potential energy. An object frequently possesses potential energy as a result of its location. A ball held in the air, for instance, has the potential to fall and hence contains potential energy. Potential energy is transformed into kinetic energy, or energy of motion, when the ball falls.
Potential energy, such as the energy contained in our food, can also be chemical energy. The energy required to initiate a chemical reaction is known as activation energy, while subjects relating to heat energy are covered by thermodynamic energy.
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A car can accelerate from rest to a speed of 28 m/s in 20 s. What is the average acceleration of the car
Formula for acceleration:
[tex]a=\dfrac{V^f-V^I}{t}[/tex]
acceleration(measured in m/s^2) = Final velocity(measured in m/s) - Initial velocity(measured in m/s) / time(measured in seconds)
__________________________________________________________
Given:
[tex]V^I=0m/s[/tex] (rest)
[tex]V^f=28m/s[/tex]
[tex]t=20s[/tex]
[tex]a=?[/tex]
__________________________________________________________
Finding acceleration:
[tex]a=\dfrac{V^f-V^I}{t}[/tex]
[tex]a=\dfrac{28-0}{20}[/tex]
__________________________________________________________
Answer:
[tex]\boxed{a=1.4m/s^2}[/tex]
Which parts differentiate ray diagram of reflected and reflected light check all that apply
Answer
4. Reflected ray
5. Refracted ray
Answers for the rest of the assignment
Diagram 2.
Refraction.
A and C.
The surface of the paper is rough, which causes incoming light rays to bounce off in a variety of different directions. Therefore, diffuse reflection occurs.
45 degrees.
1.5
2.3
74 degrees.
Air
Lucite
Hope this helps:)
The answers include the following:
The parts which differentiate ray diagram of reflected and reflected light are reflected and refracted ray.The surface of the paper is rough, which causes incoming light rays to bounce off in a variety of different directions which is why diffuse reflection occurs.What is Diffuse reflection?This is referred to as the scattering of light that occurs when it reflects off a surface.
For a rough surface, reflected light rays scatter in all directions which is therefore the reason why it was chosen as the correct choice.
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What is the Darcy Weisbach formula?
The Darcy-Weisbach formula is an equation used to calculate the frictional losses, or pressure drop, in a fluid flowing through a pipe or other conduit. It is widely used in fluid mechanics and engineering.
The formula is:
ΔP = f (L/D) (ρ V^2 / 2)
The Darcy-Weisbach formula is an equation that is used to calculate the frictional pressure drop or head loss in a fluid flowing through a pipe or duct. It was developed by Henry Darcy and Julius Weisbach in the mid-19th century and is still widely used today.
The Darcy-Weisbach formula is based on the concept of the Reynolds number, which is a dimensionless quantity that characterizes the flow regime. For laminar flow, the formula reduces to the Hagen-Poiseuille equation, while for turbulent flow, it includes a friction factor that depends on the Reynolds number and the relative roughness of the pipe or duct. It takes into account the fluid properties, such as viscosity and density, as well as the roughness of the pipe or duct walls.
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Did you see anything moving in the sky? What do you think it could be?
There are a lot of moving objects in the sky. That might be a meteorite, commonly known as a shooting star.
A meteorite is a piece of solid debris from an object, such as a comet, asteroid, or meteoroid, that begins in deep space and makes it through the atmosphere to the surface of a planet or moon. Due to friction, pressure, and chemical reactions with the atmospheric gases, the original item warms up and emits energy as it reaches the atmosphere.
These are the objects that travel across space before igniting upon contact with the earth's atmosphere. They seem dazzling as a result when they enter the earth's atmosphere. As a result, they seem brilliant and are visible in the sky.
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Which of these is not a difference between the gravitational force and the Coulomb force?
a.the strengths of the forces are the same
b.both forces are always attractive
c.the force decreases by the factor 1/r2 as distance increases
d.both forces fields are measured in same units
Both the gravitational influence and indeed the Coulomb force are always attracting, hence there is no distinction between them(option b).
Describe force.A clear meaning is associated to the word "force." The terms "pressure" and "pull" are totally acceptable at this degree to describe dynamics. An object does not have a force inside of it or within it. Another object applies a force to the first. Both living things and non-living things can be considered to be parts of a force.
Is strength equivalent to force?As a result of their seeming comparable definitions, force and power are frequently employed interchangeably. They are not equivalent, nevertheless, in physics. A two things interacting produces force as its primary byproduct.
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The tangential speed on the outer edge of a rotating carousel is _______.
In a spinning carousel, the tangential speed is higher away from the centre than it is near the outer edge.
What is tangential speed, exactly?Each item travelling in a circle experiences tangential velocity, which is the rate at which it moves linearly. Compared to a point close to the centre, a point on the turntable's outer edge travels farther throughout one full spin.
The reason for tangential speed?The linear part of an object's speed that is travelling along a circular path is called tangential velocity. The velocity of a body moving tangentially at any point along a circular path at r units from the centre is known as tangential motion. Tangential velocity is used to describe this.
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two large, charged plates with charge density ± 30 � c / m 2 ±30μc/m 2 face each other with a separation of 5.0 m m 5.0mm. the negative plate is grounded, and defined as 0 potential.
The electric field between the two charged plates is ±1.697 x 10^10 N/C, directed from the positive plate to the negative plate.
Given:
Charge density of each plate = ±30 μC/m^2
Separation between the plates = 5.0 mm = 0.005 m
The negative plate is grounded and defined as 0 potential.
We can calculate the electric field between the plates as follows:
Calculate the surface charge density of each plate. Since the plates are large, we can assume that they are infinite in extent, so we can use the formula:
σ = Q / A
where σ is the surface charge density, Q is the charge on the plate, and A is the area of the plate. Since the plates are oppositely charged and have the same surface charge density, we can calculate the charge on each plate as:
Q = σ * A
The area of each plate is given by:
A = d * w
where d is the distance between the plates and w is the width of the plates (which we assume to be very large). Thus, we have:
A = 0.005 m * ∞ = ∞
Therefore, the charge on each plate is:
Q = σ * A = ±30 μC/m^2 * ∞ = ±∞
Note that the charge is infinite, but we can still calculate the electric field between the plates because we only need to know the charge distribution and not the actual charge.
Calculate the electric field between the plates. Since the plates are oppositely charged, the electric field between them will be uniform and directed from the positive plate to the negative plate. The electric field is given by:
E = σ / (2 * ε0)
where ε0 is the permittivity of free space. Substituting the values, we get:
E = ±30 μC/m^2 / (2 * 8.85 x 10^-12 F/m) = ±1.697 x 10^10 N/C
Note that the electric field is the same magnitude for both plates, but the direction is opposite.
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what total force will cause an object with a mass of 10kg to gain 5 meters per second every second?
1 kg/m/s2 is equivalent to 1 Newton. It measures the force necessary to accelerate 1 kilogramme at 1 m/s2. It takes 50 times the force to accelerate 10 times the mass at 5 times the rate. 50N.
What is the fundamental of force?Any of the four fundamental forces in physics—gravitational, electromagnetic, strong, and weak—that control how things or particles interact as well as how some particles decay—is referred to as a fundamental force, also known as a fundamental interaction. All recognised natural forces originate from these basic forces.
What characteristics does force have?Therefore, the characteristics of lines of force are that they begin at a positive charge and end at a negative charge, they never cross, they are proportional to charge and immobile in a conductor.
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what is drop in mililiter?
20 drops per millilitre. Example: To convert 15 drops to millilitres, multiply by 0.05 to get 0.75 mL.
A drop is a unit of volume commonly used in medicine and cooking. The volume of a single drop can vary depending on factors such as the size of the dropper or the liquid being measured, but a commonly accepted standard is that one drop is equal to approximately 0.05 milliliters (mL).
It's important to note that relying on drops as a precise measurement can be problematic, as variations in dropper size, liquid viscosity, and other factors can cause significant variations in the actual volume of a drop. For this reason, it's often more accurate to use graduated measuring devices like syringes or graduated cylinders when precise measurements are required.
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The figure is a section of a conducting rod of radius R1 = 1.40 mm and length L = 12.80 m inside a thin-walled coaxial conducting cylindrical shell of radius R2 = 13.2R1 and the (same) length L. The net charge on the rod is Q1 = +3.63 Ã 10-12 C; that on the shell is Q2 = -2.04Q1. What are the (a) magnitude E and (b) direction (radially inward or outward) of the electric field at radial distance r = 2.13R2? What are (c) E and (d) the direction at r = 5.02R1? What is the charge on the (e) interior and (f) exterior surface of the shell?
(a) Magnitude of electric field at r = 2.13R2: calculated to be approximately 1.58 x 10^5 N/C.
(b) Direction of electric field at r = 2.13R2: radially inward.
(c) Magnitude of electric field at r = 5.02R1: calculated to be approximately 4.15 x 10^3 N/C.
(d) Direction of electric field at r = 5.02R1: radially inward.
(e) Charge on interior surface of shell: -7.65 x 10^-12 C.
(f) Charge on exterior surface of shell: 0.
What is direction of an electric field?The direction of an electric field at a point in space is defined as the direction of the force that a positive test charge placed at that point would experience due to the presence of other charges.
In other words, place a positive test charge at a point in space where there is an electric field, it will experience a force due to the electric field. The direction of this force is the direction of the electric field at that point. If the electric field is pointing towards the positive test charge, it will experience a repulsive force and move away from the positive charges that are causing the electric field. If the electric field is pointing away from the positive test charge, it will experience an attractive force and move towards the negative charges that are causing the electric field.
So the direction of the electric field is defined as the direction of the force it would exert on a positive test charge. The electric field can point radially inward, towards the center of the charge distribution, or radially outward, away from the center of the charge distribution, depending on the distribution of charges.
Calculation
The electric field due to a charged rod of length L and charge Q can be found by using the formula:
[tex]E = kQ/Lr^2[/tex]
where k is Coulomb's constant (k = 8.99 x 10^9 N m^2/C^2), and r is the radial distance from the center of the rod.
For the electric field due to the cylindrical shell, the formula to be used for the electric field due to a charged cylinder:
[tex]E = 2kQ/R2L[/tex]
where R2 is the radius of the shell and Q is the charge on the shell.
The total electric field at a given radial distance is just the vector sum of the electric fields due to the rod and the shell.
(a) and (b) At radial distance r = 2.13R2, the electric field due to the rod is given by:
[tex]E_rod = kQ1/(Lr^2) = kQ1/(L(2.13R2)^2)[/tex]
The electric field due to the shell is given by:
[tex]E_shell = 2kQ2/(R2L) = 2k(-2.04Q1)/(R2L)[/tex]
The total electric field at radial distance is then:
[tex]E = E_rod + E_shell = kQ1/(L(2.13R2)^2) + 2k(-2.04Q1)/(R2L)[/tex]
The magnitude of the electric field at this radial distance is given by:
[tex]|E| = sqrt(E_x^2 + E_y^2 + E_z^2)[/tex]
where E_x, E_y, and E_z are the components of the electric field in the x, y, and z directions.
The direction of the electric field is radially inward if E is negative and radially outward if E is positive.
(c) and (d) At radial distance r = 5.02R1, the electric field due to the rod is given by:
[tex]E_rod = kQ1/(Lr^2) = kQ1/(L(5.02R1)^2)[/tex]
The electric field due to the shell is given by:
[tex]E_shell = 2kQ2/(R2L) = 2k(-2.04Q1)/(R2L)[/tex]
The total electric field at this radial distance is then:
[tex]E = E_rod + E_shell = kQ1/(L(5.02R1)^2) + 2k(-2.04Q1)/(R2L)[/tex]
The magnitude of the electric field at this radial distance is given by:
[tex]|E| = sqrt(E_x^2 + E_y^2 + E_z^2)[/tex]
where [tex]E_x, E_y, and E_z[/tex] are the components of the electric field in the x, y, and z directions.
The direction of the electric field is radially inward if E is negative and radially outward if E is positive.
(e) The charge on the interior surface of the shell is given by Q2, which is -2.04Q1.
(f) The charge on the exterior surface of the shell is 0, since the shell is a conductor and the charge is distributed evenly over its surface.
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what happens to the temperature of the gas during an isobaric expansion?
The temperature of the gas remains constant during an isobaric expansion.
What is the temperature ?The temperature is a measure of the degree of hotness or coldness of an object or an environment. Temperature is usually measured in units of degrees Celsius (°C), Fahrenheit (°F) or Kelvin (K). Generally, temperatures range from low negative values to extremely high positive values. The average temperature on Earth is about 15°C (59°F).
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For an isobaric process to occur the temperature of the gas must rise as the volume of gas increases. Since temperature and volume change there is work and internal energy change involved.
Heat enters the system when an isobaric expansion process occurs. The mechanism uses some of the heat to operate on the surroundings, while the remaining heat is used to boost internal energy.
The volume of the gas expands during an expansion process, raising the temperature along with it.
What is the temperature ?The temperature is a measure of the degree of hotness or coldness of an object or an environment. Temperature is usually measured in units of degrees Celsius (°C), Fahrenheit (°F) or Kelvin (K). Generally, temperatures range from low negative values to extremely high positive values. The average temperature on Earth is about 15°C (59°F).
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why is it necessary that a force probe be calibratedA.because there is a slight variance between sensors, this improves repeatability and helps neutralize driftB.because velocity would be changing and acceleration would be constant, which means force is constantC.because, for example, if you are adding 2 forces together with the same direction and magnitude, they will double, just like when adding vectorsD.To make sure that the motion detector only catches the motion of the ball and not the motion of the experimenter's hand
A option is correct. Calibrating a force probe is necessary because there can be a slight variance between sensors of the same make and model.
Calibrating a force probe is necessary because there can be a slight variance between sensors of the same make and model, which can result in inaccurate or inconsistent measurements. Calibration helps to identify and correct for these variations, which improves the accuracy and repeatability of the measurements. Additionally, over time, factors such as temperature and wear and tear can cause the readings of a force probe to drift or change slightly. Calibrating the probe periodically can help to detect and correct for these changes, ensuring that the probe continues to provide accurate readings.
To make sure that a motion detector only catches the motion of a ball and not the motion of an experimenter's hand, it is important to minimize any movement or vibration of the hand or the experimental setup. This can be achieved by using a tripod or other stable support for the motion detector, and by positioning the detector in a way that is focused only on the area where the ball is expected to move. In addition, it may be helpful to use software or filters to carefully analyze the data collected by the motion detector to ensure that any extraneous movement or noise is filtered out, leaving only the relevant data. By taking these steps, the motion detector can accurately capture the motion of the ball without being affected by the motion of the experimenter's hand.
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Which one of the following statements is true concerning the electrostatic charge on a conductor?
A. It is uniformly distributed throughout the volume
B. It is confined to the surface and is uniformly distributed
C. Most of the charge is on the outer surface, but it is not uniformly distributed
D. It is entirely on the surface and it is distributed according to the shape of the object
E. It is dispersed throughout the volume of the object and distributed according to the object's shape
The correct statement concerning the electrostatic charge on a conductor is “it is entirely on the surface and it is distributed according to the shape of the object” (D)
In the presence of an electric field, it is known that free electrons in a conductor will either drift or be forced to move in response to the field. Within the conductor, the electrons distribute themselves in such a way as to ensure that the ultimate electric field at every point within the conductor is zero.
Near the edge of a conductor, the electric field lines are oriented perpendicular to the surface of the wire, and they terminate or begin on charges that are located there. The surface or surfaces of a conductor are the only locations where an excess charge can be found.
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Based on what you learned about light, select all of the correct statements from the following list.A photon is a particle of light.High frequency photons carry more energy than long wavelength photons.Light can act both as a wave and a particle.All electromagnetic waves travel at the speed of light.
All of the following statements are correct that High frequency photons carry more energy than long wavelength photons. Both a wave and a particle can behave as light. For all electromagnetic waves, the speed of light remains constant.
Which 4 categories best describe light science?The electromagnetic spectrum spans a far wider range than the visible light, which contains all the colours of the rainbow. Invisible to the human eye, such as radio waves, microwaves, infrared radiation, ultraviolet rays, X-rays, and gamma rays, are examples of other types of light.
Which has a higher photon energy?Since a photon's energy is determined by the frequency of the light, light with the highest frequency will also have the maximum energy per photon. As a result, violet light will have the most energy per photon.
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When wind and running water gradually decrease in velocity the transported sediments are deposited.
Option 1 is Correct. The carried sediments are deposited over time and sorted by size and density as the speed of the wind and flowing water gradually decreases.
This is because sediments or rocks may accumulate as the velocity drops, resulting in a diversity of sizes and a change in density. The minimum flow velocity rises once more to dissolve particles larger than 0.5 millimeters. Curve of settling velocity With a flow velocity of 0.1 centimeter per second or less, a particle measuring 0.01 millimeters would be deposited.
Only larger and larger particles will be deposited as the flow velocity rises. Sediments are deposited to produce point bars as a result of a decrease in water velocity inside the channel bend. Where the slopes are low, meandering waterways develop.
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Correct Question:
When wind and running water gradually decrease in velocity, the transported sediments are deposited
(1) all at once, and are unsorted
(2) all at once, and are sorted by size and density
(3) over a period of time, and are unsorted
(4) over a period of time, and are sorted by size and density
Calculate the force of attraction between a cation with a valence of +2 and an anion with a valence of -2, the centers of which are separated by a distance of 2.5 nm.
Then force of attraction between the cation and anion can be calculated using Coulomb's law: Force = -7.592 x 10^-9 N.
What is the attraction ?The attraction of visiting a new place is the opportunity to explore, discover and learn something new. Visiting a new place often involves immersing oneself in new cultures and customs, experiencing different foods and cuisines, and taking in breathtaking views. By exploring a new place, one can gain a greater understanding of the past and present, and appreciate the diversity of people, cultures, and landscapes. Travelling to a new place also offers the chance to make new friends, learn new skills and create lasting memories. Visiting a new place can be a thrilling, eye-opening experience, and the memories created will last forever.
Then force of attraction betweena the cation and anion can be calculated using Coulomb's law:
Force = k * (Q1 * Q2) / r2
where k is Coulomb's constant (8.99 x 10^9 N*m²/C²), Q1 and Q2 are the charges of the cation and anion (2 and -2 in this case), and r is the distance between the two particles (2.5 nm).
Force = 8.99 x 10^9 N*m²/C² * (2 * -2) / (2.5 x 10^-9 m)²
Force = -7.592 x 10^-9 N
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Then force of attraction between the cation and anion can be calculated using Coulomb's law: Force = [tex]-7.592 \times 10^{-9} N.[/tex]
What is the attraction ?The attraction of visiting a new place is the opportunity to explore, discover and learn something new. Visiting a new place often involves immersing oneself in new cultures and customs, experiencing different foods and cuisines, and taking in breathtaking views. By exploring a new place, one can gain a greater understanding of the past and present, and appreciate the diversity of people, cultures, and landscapes. Travelling to a new place also offers the chance to make new friends, learn new skills and create lasting memories. Visiting a new place can be a thrilling, eye-opening experience, and the memories created will last forever.
Then force of attraction between a the cation and anion can be calculated using Coulomb's law:
[tex]Force = k \times (Q1 \times Q2) / r^2[/tex]
where k is Coulomb's constant ([tex]8.99 \times 10^9 N\times m^2/C^2)[/tex], Q1 and Q2 are the charges of the cation and anion (2 and -2 in this case), and r is the distance between the two particles (2.5 nm).
[tex]Force = 8.99 \times 10^9 N\times m^2/C^2 \times (2 \times -2) / (2.5 \times 10^{-9} m)^2\\Force = -7.592 x 10^{-9} N[/tex]
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What are examples of a third class lever?
Examples of third-class levers are Baseball bats, Shovels, Fishing rods, and Tweezers.
A third-class lever is a particular kind of basic machine that is frequently utilized in a variety of products, from sporting goods to construction tools.
Third-class levers include, for instance:
The bat's point of contact with the ball is known as the fulcrum, and the batter's hands' exerted force is known as the effort.
While using a shovel, the effort is the force used by the user's hands, and the fulcrum is the point at which the blade makes contact with the ground.
The effort, or power used to reel in the fish, is given to the fishing line at the place where the angler's hands are holding the rod.
The fulcrum is the point where the tips of the tweezers meet, and the effort is the force applied by the user's fingers to grip and remove a small object.
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A regulation basketball has a 46 cm diameter and may be approximated as a thin spherical shell. How long will it take a basketball starting from rest to roll without slipping 4.4m down an incline that makes an angle of 15.4° with the horizontal?
The acceleration of gravity is 9.81m/s^2? Answer in units of s
Answer: 2.2 seconds!
Explanation:
The answer is approximately 2.2 seconds.
To find this, we can apply the equations of motion for a rolling sphere on an incline. Since the ball is starting from rest, its initial velocity is 0 m/s. We also know the angle of inclination (15.4°) and the distance the ball must travel (4.4m).
Using the equations of motion, we can solve for the acceleration of the ball, which is given by:
a = g*sin(θ)
where g is the acceleration due to gravity (9.81 m/s2) and θ is the angle of inclination (15.4°).
So, the acceleration of the ball is:
a = 9.81 * sin(15.4°) = 3.15 m/s2
Now we can use the equations of motion to solve for the time it will take for the ball to travel the 4.4m.
The equation for displacement is given by:
x = 1/2 * a * t^2
Where x is the displacement (4.4m in this case), a is the acceleration (3.15 m/s2) and t is the time.
Rearranging the equation to solve for t, we get:
t = sqrt(2x/a)
Substituting in the values for x and a, we get:
t = sqrt(2*4.4/3.15) = 2.2 s
Therefore, it will take the basketball approximately 2.2 seconds to roll 4.4m down the incline.
Science question is in photo
The three types of DNA mutation as shown in the given examples rea:
substitutioninsertion, anddeletionWhat are DNA mutations?DNA mutations are changes that occur in the sequence of nucleotides that make up the DNA of an organism.
The types of mutation that are discussed in the image are:
Substitutions are base pair-specific mutations also referred to as point mutations. Nucleotide substitutions, in which one base is swapped out for another, are the most frequent type of mutation.An insertion, or the addition of a base, can potentially cause mutations.A deletion, or the elimination of a base, can also result in mutations.Learn more about DNA mutations at: https://brainly.com/question/23030726
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what is the lowest theoretical temperature that can exist in the universe on the kelvin scale?
Answer: 0 K
Explanation: On the Kelvin scale, absolute zero (0 K) is the temperature at which the volume of a gas becomes zero. It is therefore the lowest possible temperature, or the absolute zero on any temperature scale.
How do you calculate net power dissipation?
The formula P = IV, where I and V represent current and voltage, is used to compute the power dissipation in an electrical circuit.
Power is lost by any resistor in a circuit that has a voltage drop across it. All resistors have a power rating because the electrical energy is transformed into thermal energy. The resistor can dissipate up to this amount of electricity without burning out. The power of dissipation is determined by the conversion rate.
In order to compute dissipated power, use the formula P = IV.
For instance, suppose the circuit's voltage is 2 V and its current is 20 A. Thus, the power dissipation in the circuit is 40W since P = 20 x 2 P = 40W.
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What is meant by impulse in physics?
Impulse is an important concept in many areas of physics, including mechanics, electromagnetism, and quantum mechanics.
It is also used in engineering and technology, such as in the design of airbags and other safety systems that are designed to protect people from the effects of sudden changes in momentum. In physics, impulse refers to the change in momentum of an object caused by a force acting on it for a period of time. It is a vector quantity that is equal to the force applied multiplied by the time for which it acts.
The formula for impulse is:
Impulse = Force x Time
or
J = F x Δt
where J is the impulse, F is the force applied, and Δt is the time for which the force is applied.
Impulse is closely related to momentum, which is the product of an object's mass and velocity. According to Newton's second law of motion, the change in an object's momentum is equal to the force applied to it, multiplied by the time for which it acts.
By applying a force over a period of time, impulse can increase or decrease the momentum of an object. For example, when a baseball bat hits a ball, the force applied by the bat over a short period of time creates a large impulse that changes the ball's momentum and sends it flying through the air.
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The electric potential energy of a system of two point charges is proportional to? (1 Point)
A. The distance between the two charges.
B. The square of the distance between the two charges.
C. The inverse of the distance between the two charges.
D. The inverse of the distance between the two charges.
E. The inverse of the square of the distance between the two charges.
The electric potential energy of a system of two point charges is inversely proportional of the distance between the two charges.
Electric potential energy is a implicit energy( measured in joules) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system. An object may be said to have electric implicit energy by virtue of either its own electric charge or its relative position to other electrically charged objects.
The term" electric implicit energy" is used to describe the implicit energy in systems with time- variant electric fields, while the term" electrostatic implicit energy" is used to describe the implicit energy in systems with time- steady electric fields.
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