A 45 kg man is pulling up his 56 kg climbing partner up a cliff via a cable pulley. If he pulls with a force of 3000N, the net force of the horizontal motion is 2,451.2 N
Unless acted upon by an imbalanced force, an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and direction.
The term "unbalanced force" in Newton's first law refers to a force that is not entirely counterbalanced (or cancelled) by the other independent forces. An uneven force exists if either all the vertical forces (up and down) or all the horizontal forces do not cancel each other.
The vector sum of all forces acting on an object is known as the net force. In other words, the net force is the culmination of all forces.
so F pulling up is 3000 N, first we should calculate force of the partner
Force = mass x accelleration
Force partner = 56 Kg x 9.8 = 548.8 N
net force = force pulling up - force partner
Net force horizontal = 3000 N - 548.8 N =2,451.2 N
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FIGURE Q2.7 shows the position-versus-time graph for a movingobject. At which lettered point or points:a. Is the object moving the fastest?b. Is the object moving to the left?c. Is the object speeding up?d. Is the object turning around?
A distance-time graph is a graph that displays an object at various positions and times. This graph's slope provides the speed value. is shifting in such a way that the slope of the position-time graph varies at six separate places.
The steepest slope of the x-t graph is found at point C. The object is therefore travelling the fastest at point C.
Step 1 of Part B: Introduction
The velocity of the supplied item is a tangent to the position-time curve.
Step 2: Clarification
The slope of the curve at point F in the provided graph is negative. Which means that at F, the object is travelling in the opposite direction, or in the direction of the starting point, if we regard the positive x-axis to be positive.
Step 1 of Part C: Introduction
Whether an object is travelling to the right or to the left depends on the slope of the velocity curve with a positive x-axis.
Step 2: Clarification
The slope of the curve is increasing from point B or is moving in the direction of a positive value. The purpose is therefore accelerating up from point B.
Step 1 of Part D: Introduction
At point E, the positive x-axis is parallel to the tangent of the x-t curve.
Step 2: Clarification
At point E, the position-time curve's slope is zero. The slope turns negative from this point onward. From point E, the curve is turning around and moving in the opposite direction.
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A volleyball player spikes a volleyball over the net. The mass of the volleyball is 0.3 kg. The ball accelerates at 800 m/s2. What is the net force that accelerates the ball?
The magnitude of net force which is required to accelerate the ball is 240 Newtons.
What is the net force?The net force is the vector sum of all the forces which are acting on a particle or an object. The net force is a single force which replaces the effect of the original forces which are acting on the particle's motion.
F = m × a
where, F = net force,
m = mass of the object,
a = acceleration of the object
F = 0.3 × 800
F = 240N
Therefore, the net force which is required to accelerate the ball is 240 Newtons.
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a ball is thrown straight up from the ground level, with an initial velocity of 9.8 m/s. how high is the ball thrown? assume the acceleration due to gravity is 9.8 m/s2.
The ball is thrown up to a height of 4.9 high. The result is obtained by using the equation in uniformly accelerated straight motion.
Uniformly Accelerated Straight MotionThe equations apply in uniformly accelerated straight motion in vertical dimension are
v₁ = v₀ + gt
v₁² = v₀² + 2gh
h = v₀t + ½ gt²
Where
v₀ = initial velocityv₁ = final velocitya = accelerationt = timex = distanceA ball is thrown straight up from the ground level.
v₁ = 9.8 m/sg = 9.8 m/s²Find the height of the ball thrown!
It means that we find for the highest point of the ball can reach. That time the velocity of the ball is 0.
Use the second equation above to find the height of the ball thrown!
v₁² = v₀² - 2gh
0 = 9.8² - 2(9.8)h
96.04 = 19.6h
h = 4.9 m
Hence, the highest point of the ball thrown is 4.9 m.
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After the switch has been closed for a very long time, it is then opened. What is Q(topen), the charge on the capacitor at a time topen = 635 μs after the switch was opened?
The open circuit charge, Q, is the charge on the capacitor at a time t open = 635 s after the switch was opened (t open).
The charge on the capacitor at a time t open = 635 μs after the switch was opened, is known as the open circuit charge, Q(t open). This charge can be calculated using the equation Q(t open) = Q(t close)e^(-RC t open), where Q(t close) is the charge on the capacitor at the time the switch was closed, R is the circuit resistance, and C is the capacitance. Substituting in the given values gives Q(t open) = Q(t close)e^(-RC635 μs), which is the charge on the capacitor 635 μs after the switch was opened.
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planetary winds and currents move in the same direction.
Planetary winds and currents have a significant impact on the Earth's climate and weather patterns. They are influenced by a variety of factors such as solar radiation, the rotation of the Earth, and temperature gradients.
Planetary winds and currents move in the same direction, assisting in the transport of heat and moisture around the world. For example, trade winds move from subtropical high-pressure zones to equatorial low-pressure zones, whereas prevailing westerlies move from west to east. Warm currents flow from the equator to the poles, and cold currents flow from the poles to the equator, as do ocean currents. The direction and strength of planetary winds and currents influence climate and weather patterns in various parts of the world.
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Worksheet Level 2:
I need to find this worksheet it’s about the Pythagorean theorem
In a Pythagoras Theorem worksheet, students are given triangles with several orientations and asked to determine which side is the longest.
What is Pythagorean theorem answers?Any right triangle has the property that the sum of the squares of its legs equals the square of its hypotenuse, or a2 + b2 = c2. The Pythagorean Theorem describes this connection. The result of the theorem is expressed as (leg)2 + (leg)2 = (hypotenuse)2.Pythagoras, a Greek philosopher who was born around 570 BC, is honoured in the name of the theorem. Perhaps more than any other mathematical theorem, the theorem has been demonstrated several times using a variety of techniques.Pythagoras was a Greek philosopher who contributed significantly to the fields of mathematics, astronomy, and music theory. Although the Babylonians were aware of the Pythagoras' theorem a thousand years before, he may have been the first to demonstrate it.To learn more about Pythagoras refer to:
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A charge q is located at the centre of a cube. The electric flux through any face is :
Answer: 4πq/ 6(4π∈₀)
What is the Electric Flux through the surface?
According to Gauss's theorem in electrostatics, the flow of electricity through a surface depends only on the amount of charge trapped on the surface. It does not depend on the size or shape of the surface. Therefore, the flow of electricity through the surface is the same for all figures.
Step 1: Charge enclosed in cube =q
Step 2: Apply Gauss Law
Electric flux passing through cube = Charge Enclosed / ∈ = q / ∈₀
A charge is placed at the centre, Therefore, due to symmetry, all six faces of the cube are equivalent, so the same flux will pass through each face.
∴ Flux through each face = Total flux through cube / 6
= q / 6∈₀ = 4πq/ 6(4π∈₀)
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A charge q is located at the centre of a cube. The electric flux through any face is 4πq/ 6(4π∈₀)
What is the Electric Flux through the surface?
According to Gauss's theorem in electrostatics, the flow of electricity through a surface depends only on the amount of charge trapped on the surface. It does not depend on the size or shape of the surface. Therefore, the flow of electricity through the surface is the same for all figures.
Step 1: Charge enclosed in cube =q
Step 2: Apply Gauss Law
Electric flux passing through cube = Charge Enclosed / ∈ = q / ∈₀
A charge is placed at the centre, Therefore, due to symmetry, all six faces of the cube are equivalent, so the same flux will pass through each face.
∴ Flux through each face = Total flux through cube / 6
= q / 6∈₀ = 4πq/ 6(4π∈₀)
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Electrical energy can be delivered as a direct current or alternating current. Identify a common application of energy delivered as direct current and a common application of energy delivered as alternating current.
AC current is generally used to power homes and businesses while DC current is typical of batteries that power flashlights and other home appliances.
What is the main difference between Alternating and Direct current?In direct current, the voltage is always constant, and the electricity flows in a certain direction. In alternating current, the voltage periodically changes from positive to negative and from negative to positive, and the direction of the current also periodically changes accordingly.Given is that electrical energy can be delivered as a direct current or alternating current.
AC current is generally used to power homes and businesses, and is also present when audio and radio signals are carried on electrical wires. DC current is typical of batteries that power flashlights and other home appliances and is also used in some industrial applications
Therefore, AC current is generally used to power homes and businesses while DC current is typical of batteries that power flashlights and other home appliances.
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seafloor topography can be mapped by satellite sensors that use: group of answer choices electromagnetic waves that pass through ocean water and bounce back to the satellite from the seafloor. extremely sensitive cameras that sense electromagnetic radiation being emitted by the seafloor. sound waves that pass through ocean water and bounce back to the satellite from the seafloor. electromagnetic waves that bounce back to the satellite from the sea surface.
Answer:wet wet
Explanation:
a car accelerates at 1.76 m/s2 along a straight road. it passes two marks that are 26 m apart at times 2.5 s and 4.2 s. what was the car's initial velocity?
The car's initial velocity is 17.12 m/s.
What is initial and final velocity?When gravitational force is first exerted on an object, its initial velocity describes how quickly it moves. The final velocity, on the other hand, is a vector quantity that gauges the speed and direction of a moving object after it has experienced its maximum acceleration.
[tex]x_{5}[/tex] - [tex]x_{4}[/tex] = [tex]V_{4} t[/tex] + [tex]\frac{1}{2}[/tex][tex]at^{2}[/tex]
[tex]26 = v4(1) +\frac{1}{2} (1.76)(1)2[/tex]
v4 = 25.12m/s
25.12 = v0 + a(4)
v0 = 17.12 m/s
Hence 17.12 m/s is a correct answer for the car's initial velocity.
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A spring is hung from the ceiling. When a block is attached to its end, it stretches 2.0 cm before reaching its new equilibrium length. The block is then pulled down slightly and released. What is the frequency of oscillation? (in Hertz)
The frequency of oscillation can be calculated using the formula f = 1/2π√(k/m) where k is the spring constant and m is the mass of the block.
Using a spring constant of k = 100 N/m and a mass of 2 kg, the resulting frequency of oscillation is 0.785 Hertz.
This formula is known as the natural frequency, and is an important concept in physics. The natural frequency of a system is the frequency at which it tends to oscillate when it is disturbed. This is why when a mass is attached to a spring, the system oscillates when it is disturbed. The natural frequency of a system is determined by the mass and stiffness of its components.
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As well as oxygen levels and rainfall, what other non-living indicator can give a good indication of changes in the environment?.
As well as oxygen levels and rainfall, temperature as
non-living indicator also can give a good indication of changes in the environment.
Change in natural environmentChanges in the natural environment can occur due to natural factors and human factors. Floods, hot lava, volcanic eruptions, earthquakes and tsunamis are examples of changes in the natural environment due to natural factors.
While the cause of changes in the natural environment due to human factors that can cause changes in the natural environment.
For example, the use of technology in managing nature, excessive use of the natural environment, disposal of waste into the natural environment and so on.
When the use of technology is not considered properly it can result in damage. Changes that occur in the natural environment can even cause the people who live in the area to be forced to leave their homes.
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A 7. 0 kg bowling ball traveling at 2. 0 m/s collides with a stationary 0. 5 kg beach ball in an elastic collision. The bowling ball leaves the collision with a velocity of 1. 5 m/s traveling in the same direction as the beach ball.
The final velocity of the beach ball is 4.5 m/s, traveling in the same direction as the bowling ball after the collision.
Given that the initial velocity of the beach ball is 0 m/s, we have:
7.0 kg * 2.0 m/s + 0.5 kg * 0 m/s = 7.0 kg * 1.5 m/s + 0.5 kg * v2'
Solving for v2', we get:
v2' = (7.0 kg * 2.0 m/s + 0.5 kg * 0 m/s - 7.0 kg * 1.5 m/s) / 0.5 kg = 4.5 m/s.
A collision is a sudden, forceful event that occurs when two or more objects come into contact with each other. This can happen in various physical settings, from subatomic particle interactions to car accidents. In physics, collisions are often studied to understand the motion and energy transfer between objects.
Collisions can either be elastic or inelastic. In an elastic collision, the total kinetic energy of the colliding objects is conserved, and the objects simply bounce off each other. In an inelastic collision, the total kinetic energy of the objects decreases due to the transfer of energy into other forms such as heat, sound, or deformation.
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X + worksheet/questions?ald=25241606&wld 3215 MG Calculate Speed X What is the average speed of a car that travels 200 miles in 5 hours? miles per hour (just write the number) Type your answer in below.
Answer:
40 miles per hour
Explanation:
Average speed = distance ÷ time
= 200 ÷ 5
= 40
Someone solve this please
If an outside force acts on a system and causes a change in its velocity, the system is said to be accelerating. The rate at which this velocity changes is known as the system's acceleration.
How will you determine the acceleration of the system?The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.
According to Newton's second law, this acceleration is equal to the product of the entire force acting on the system and its total mass. Now observe that the two bodies can each be considered separately in terms of Newton's law.
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at which of the following locations is the electric field the strongest? a point 1 m from the surface of a charged spherical shell with a radius of 0.5 m and a charge of 1 c a point 0.1 m (perpendicular distance) from the center of a 10-m-long wire with 1 c of charge distributed on it a point 1 m from a 1-c point charge a point 0.1 m (perpendicular distance) from the center of a 10-m2 conducting plane with charge with 1 c of charge distributed on each side a point 1 m from the surface of a charged spherical with a radius of 1 m that has 1 c of charge distributed on it
A point 0.1 m (perpendicular distance) from the center of a 10 - m long wire with 1C of charge distributed on it. Thus, option 4 is correct.
What is charge?Subatomic particles with an electric charge will exert a force when they are in an electric or magnetic field, according to the definition of electric charge.
Protons and electrons are the most common charge carriers for the two types of electrical charges—positive and negative.
Subatomic particles or matter particles serve as examples of different types of charges:
The charge on a proton is positive.
Negative charge is a property of electrons.
Null charge exists in neutrons.
Option 4 has the the strongest electric field
[tex]$$for the long wire,$$\mathrm{E}=\frac{\lambda}{2 \pi \epsilon_{\mathrm{o}} \mathrm{r}}$$where,$$\lambda=\frac{\mathrm{Q}}{\mathrm{L}}=\frac{1}{10}=0.1 \frac{\mathrm{C}}{\mathrm{m}}$$so,$$\begin{aligned}\mathrm{E} & =\frac{0.1}{2 \pi \times 8.85 \mathrm{e}-12 \times 0.1} \\\mathrm{E} & =1.8 \times 10^{10} \ {\mathrm{N}}/{\mathrm{C}}\end{aligned}$$[/tex]
which is comparatively stronger than other cases.
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complete the following statement: the term net force most accurately describes
The overall force acting on an object, taking into account all the individual forces that are affecting it. The net force is equal to the sum of all the forces acting on an object, and it determines the direction and magnitude of the object's motion.
The net force is also known as the resulting force and it is calculated by subtracting the forces that are in the opposite direction from the forces that are acting in the same direction. The net force is an important concept in physics and is used to describe the interactions between objects and the physical laws that govern motion. force of anything is the measure of the body to create a pressure to pull or push something from its position and we can do it. The net force is equal to the sum of all the forces acting on an object
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What type of reactions are essentially opposites of one another?
The chemical reactions of decomposition and synthesis are opposite to each other.
In decomposition reaction, a chemical compound breaks apart or decomposes into two or more molecules. Generally, the decomposition reaction is represented as AB → A + B.
In this type of reaction, a final product or compound transforms into constituents or individual reactants and it is the reverse of synthesis reaction. It is also called chemical decomposition or chemical break down. For example CaCO3(s)→ CaO(s)+CO2(g) is a decomposition reaction.
On the contrary, in synthesis reaction individual reactants combine to form a chemical compound. For example CaO(s)+CO2(g) → CaCO3(s) is a synthesis reaction and is the reverse of decomposition reaction respectively.
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Explain the process by which charge is transferred and provide evidence
The process of transferring charge from a charged body to earth is called earthing and the process involves the transfer of electrons that occurs when an electron relocates from an atom or molecule to a different such entity.
What is a Charge?This is referred to as the property of subatomic particles that causes it to experience a force when placed in an electric and magnetic field.
Earthing is a method and it is a process is carried out by connecting the neutral or non-current carrying part of the equipment to the ground or other substances and the evidence involves touching of a charged particle to a conductive material which leads to the charges being transferred from the charged material to the conductor such that particles with the same charge will repel.
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A block of mass m is at rest on a rough incline, as shown in the figure above. Which of the following forces must have a magnitude equal to mg? Select 2 answers.
a. the total force exerted by the block on the incline
b. the normal force exerted on the block by the incline
c. the force of friction exerted on the block by the incline
d. the gravitational force exerted on earth by the block
The correct answers are:
a. The total force exerted by the block on the incline.
b. The normal force exerted on the block by the incline.
a. The total force exerted by the block on the incline must have a magnitude equal to mg. This force can be decomposed into two components: one parallel to the incline (friction force) and one perpendicular to the incline (normal force). The sum of these two components is equal to mg.
b. The normal force exerted on the block by the incline must have a magnitude equal to mg. The normal force is the force exerted perpendicular to the incline, and it balances the component of the weight of the block that acts perpendicular to the incline.
c. The force of friction exerted on the block by the incline does not necessarily have a magnitude equal to mg. The force of friction depends on the coefficient of friction between the block and the incline, as well as the other forces acting on the block.
d. The gravitational force exerted on Earth by the block is equal to the weight of the block, which is mg. However, this force is not relevant to the situation of the block on the incline.
Therefore, the correct options are a and b.
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estimate the average gasoline consumption over the time interval [0,3]. the average consumption is enter your response here gallons per day.
Average gasoline consumption is 20,000 gallons per day.
Engineer-of-Record, Proctor Engineering Research & Consulting, Inc., Alachua, Florida. Gasoline engine, any of a class of internal-combustion engines that generate power by burning a volatile liquid fuel (gasoline or a gasoline mixture such as ethanol) with ignition initiated by an electric spark. this is the oil that is made after the processing of the crude oil and we can use it in our cars for travelling in them. it is very important fuel for us as it is used for burning. Gasoline or petrol is a derivative product of crude oil/petroleum. It is derived during fractional distillation process and has a translucent liquid form. It's not used in its crude form. Different additives are added like ethanol to use it as fuel for passenger vehicles.
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Two cars with equal mass come to a stop from the same initial speed, one braking gently and the other braking hard.
The car that brakes hard will convert more kinetic energy to thermal energy compared to the car that brakes gently.
What do you mean by Kinetic energy ?Kinetic energy is the energy an object has due to its motion. It is defined as the work required to accelerate an object from rest to its current velocity. The equation for kinetic energy (KE) is given by:
KE = 0.5 * m * v²
where
m is the mass of the object and
v is its velocity.
Kinetic energy is a scalar quantity and has units of joules (J) in the SI system. It is an important concept in mechanics and is used to calculate the energy of an object in motion, the energy transfer in collisions and other interactions, and the potential energy of an object in motion.
When a car brakes, its kinetic energy is transformed into thermal energy due to the friction between the brakes and the wheels. The harder the brakes are applied, the greater the friction and the more kinetic energy is converted into thermal energy.
As a result, the car that brakes hard will experience a greater amount of friction and convert more of its kinetic energy into thermal energy, leading to higher temperatures and more energy lost as heat compared to the car that brakes gently.
Therefore, the car that brakes hard will convert more of its kinetic energy into thermal energy due to the increased friction between its brakes and wheels, leading to a greater loss of energy as heat.
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How mnemonic strategies could be used to improve memory?
Mnemonic strategies can be used to improve memory by improving the capacity of the brain to store information.
Why do mnemonics help us remember?
Mnemonics help us remember by using associations, images, and stories to link information together in a way that our brains can easily recall. This makes it easier to remember facts, numbers, or pieces of information that we would otherwise struggle to remember.
These strategies involve using techniques such as visual imagery, association, and organization to make it easier to recall information. For example, using visual imagery can help to create a mental image of the information or concept being remembered, which can help to recall it more easily. Associations can be made between new information and existing knowledge, which can also help to remember it better. Finally, organizing information into categories or hierarchies can make it easier to recall. These strategies can help to improve memory by making it easier to recall information and by improving the ability to remember information for longer periods of time.
Therefore, improving the capacity of the brain to store information is the answer.
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How many dots should be shown in the Lewis dot diagram?
The amount of dots corresponds to the atom's number of valence electrons. With no more than two dots on a side, these dots are positioned above, below, and to the right and left of the symbol.
What are the Lewis dot structure's three rules?Step 1: Finding the total amount of valence electrons is the first step. Step 2: Outline the molecule's skeletal structure. Step 3: Form each bond in the skeletal structure using two valence electrons.
How many dots should be displayed in the carbon Lewis dot diagram?Four bonds are created by the four valence electrons that make up carbon. As a result, carbon has four dots surrounding it.
A Lewis dot structure: what is it?Lewis structures are diagrams that show the valence electrons of atoms within a molecule. They are often referred to as Lewis dot structures or electron dot structures. The valence electrons of atoms and molecules, whether they reside as lone pairs or within bonds, can be seen using these Lewis symbols and structures.
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a student releases a ball from rest on an inclined plane and measures that it travels a distance of 0.5 m in a time of 2.0 s. the average speed of the ball is
The average speed of the ball is 0.25 m/s
Define speed.
Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path.
The displacement of a body over a predetermined amount of time is referred to as velocity. It has a scalar value. A vector quantity, that is.
Distance/Time = Speed.
A force has the power to alter an object's motion's direction. A greater force acting on an object will result in a greater change in motion. To undergo the same change in motion, a heavier object needs more force than a lighter thing.
S = Average speed
d = total distance
t = total time.
S = d/t.
d = 0.5m
t = 2.0s
S = 0.5/2
S = 0.25m/s
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(10 points) temperatures on mercury: mercury has a semi-major axis length of 0.387 au, an eccentricity of 0.2056, and an albedo of 0.068. a day on mercury is 4223 hrs. what is the expected equilibrium blackbody temperature in k of mercury at both perihelion and aphelion?
The expected equilibrium blackbody temperature of Mercury at perihelion is 442 K and at aphelion is 389 K.
What is meant by equilibrium blackbody?
A black body in thermodynamic equilibrium is an idealized physical body that absorbs all electromagnetic radiation that falls on it, regardless of frequency or angle of incidence. It is a theoretical construct that perfectly emits electromagnetic radiation at a characteristic temperature, which is defined by the energy balance between the energy being absorbed and the energy being emitted.
The expected equilibrium blackbody temperature of Mercury at perihelion and aphelion can be calculated using the equation:
[tex]T = ( (1 - A) / (1 - e^2)^1/4 \times (L_{sun} / (4 \times \pi \times d^2))^1/4[/tex]
where A is the albedo, e is the eccentricity, L_sun is the solar constant, and d is the semi-major axis length.
At perihelion, d = 0.387 * (1 - 0.2056) = 0.3068 au
[tex]T_{peri }[/tex]= [tex]((1 - 0.068) / (1 - 0.2056^2)^1/4 \times (1361 / (4 \times /pi \times 0.3068^2)))^1/4 = 442 K[/tex]
At aphelion, d = 0.387 * (1 + 0.2056) = 0.4684 au
[tex]T_{ap} = ((1 - 0.068) / (1 - 0.2056^2)^1/4 \times (1361 / (4 \times \pi \times 0.4684^2)))^1/4 = 389 K[/tex]
So the expected equilibrium blackbody temperature of Mercury at perihelion is 442 K and at aphelion is 389 K.
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a commuter backs her car out of her garage with a constant acceleration of 1.9 m/s2. assume that her initial motion is in the positive direction.
If a commuter backs her car out of her garage with a constant acceleration of 1.9 m/s^2 and her initial motion is in the positive direction, we can use kinematic equations to calculate the position, velocity, and time of her car.
The first equation we can use is the position equation:
x = x0 + v0 * t + 0.5 * a * t^2
where x is the final position, x0 is the initial position (which is 0 in this case since she is backing out of the garage), v0 is the initial velocity (which is 0 m/s since she is starting from rest), t is the time, and a is the acceleration (1.9 m/s^2).
The next equation we can use is the velocity equation:
v = v0 + a * t
where v is the final velocity.
To solve for t, we can use either equation and substitute the known values. For example, using the velocity equation:
v = v0 + a * t
t = (v - v0) / a
t = (v - 0) / 1.9
Once we have t, we can use it in the position equation to solve for x:
x = x0 + v0 * t + 0.5 * a * t^2
x = 0 + 0 * t + 0.5 * 1.9 * t^2
x = 0.5 * 1.9 * t^2
The above equation can thus be used to calculate the car's position as a function of time. The velocity and position of the car at any given time can be calculated by plugging the value of t into the velocity and position equations, respectively.
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At a certain temperature and preure, the peed of ound in helium i 992 meter per econd, and the peed of ound in air i 334 meter per econd. A ound with a wavelength of 4. 98 meter travel in helium and pae into air. What are the wavelength and frequency of the ound after it enter the air?
After the sound wave enters air, its wavelength is 1.68 m and its frequency is 199 Hz.
The wavelength and frequency of a sound wave are related by the equation:
v = fλ
Where,
v = the speed of sound
f = the frequency
λ = the wavelength.
In helium, the speed of sound is 992 m/s and the wavelength of the sound wave is 4.98 m. The frequency of the sound wave in helium can be calculated as:
f = v / λ = 992 m/s / 4.98 m = 199 Hz
When the sound wave passes from helium into air, the speed of sound decreases to 334 m/s. Since the frequency is constant for a given wave, the wavelength must change to compensate for the decrease in speed:
λ = v / f = 334 m/s / 199 Hz = 1.68 m
So, after the sound wave enters air, its wavelength is 1.68 m and its frequency is 199 Hz.
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A box of mass M = 10 Kg rests on a 35° inclined plane with the horizontal. A string is used to keep the box in equilibrium. The string makes an angle of 25 ° with the inclined plane. The coefficient of friction between the box and the inclined plane is 0.3.
The tension will be 52.58 N.
The angle of incline is 25°. So the Tension will be balanced by Vertical component of normal
T= N sin Ф
T= N sin 25°
The normal reaction is balanced by the vertically downward component of weight(mg). The corresponding angle on the block will be 35°
N = Mg sin 35°
T= M g sin 35° sin 25°
T= 10 9.8 sin 35° sin 25°
T= 52.58 N
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an unknown additional charge q3 is now placed at point b, located at coordinates (0 m , 15.0 m ). find the magnitude and sign of q3 needed to make the total electric field at point a equal to zero. express your answer in nanocoulombs to three significant figures.
The magnitude and sign of q3 needed to make the total electric field at point a equal to zero is +0.3nc.
What is the charge?
Electric charge is a physical property of matter that causes matter to experience a force when placed in an electromagnetic field.Electric charge can be positive or negative (commonly carried by protons and electrons, by convention). Like charges, they repel each other, and unlike charges, they attract. An object with no net charge is referred to as neutral. The early knowledge of how charged substances interact is now called classical electrodynamics and is still accurate for problems that do not require consideration of quantum effects.Two point charges are placed on the x axis. The first charge, q1 = 8.00 nC , is placed a distance 16.0 m from the origin along the positive x axis; the second charge, q2 = 6.00 nC , is placed a distance 9.00 m from the origin along the negative x axis.
q3 = +0.3nc
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