According to the static equilibrium, the tension in the wire would be 24.62 N
Since all parts of the system are at rest (Ftotal = Ttotal = 0), we will be using static equilibrium. An object is said to be in a state of static equilibrium when all of the forces acting on it are in equilibrium with one another and the object is not moving in regard to the relative plane.
Thus, the tension in the wire would be:
2Fy = m × g
Fy = (m × g) ÷ 2
Fy = (0.5 × 9.8) ÷ 2
Fy = 2.45 N
Sinθ = 2 ÷ √(4+400)
F = Fy ÷ Sinθ
F = 2.45 ÷ 0.0995
F = 24.62 N
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In Platos credo, Socrates, believes that he should follow the laws of the state Athens, because?
In Plato's philosophy, Socrates believed that he should follow the laws of the state of Athens because he believed in the idea of the "philosopher-king."
Who was Socrates?
Socrates was a classical Greek philosopher, credited as one of the founders of Western philosophy. He is best known for his method of inquiry, called the Socratic method, and for his teaching style, which was dialogic and aimed at getting students to think critically and develop their own ideas.
According to Socrates, the laws of the state were a reflection of the absolute and unchanging moral values that exist in the world. He believed that as a philosopher, it was his duty to live in accordance with these moral values, and thus to follow the laws of the state. In this way, Socrates saw himself as a servant of the divine, and believed that by following the laws, he was serving the greater good and promoting the welfare of the city.
Hence, In Plato's philosophy, Socrates believed that he should follow the laws of the state of Athens because he believed in the idea of the "philosopher-king."
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The driver of a car moving with a uniform speed of 40m/s observes a truck approaching
in the opposite direction with a speed of 20m/s.Calculate the speed of the car relative to that of the truck.
Answer:
60m/s
Explanation:
Whenever two objects are moving in opposite direction the relative speed is obtained by adding the speeds of the two objects.
Here the two vehicles are moving with speed 20m/s and 40m/s .
So the relative speed of the car relative to that of the truck will be,
(40 + 20 ) m/s
60m/s
hope this helps!
Showing your calculation determine the heat capacity of the metals for each trial: a) known metal : cu trial 1:
The heat capacity has to do with the amount of heat that can be added to cause a temperature change.
How do you experimentally determine the heat capacity?The question is incomplete but I will give you an overview of the experiment determination of the heat capacity.
The heat capacity can be experimentally determined using the method of calorimetry. This involves measuring the change in temperature of a substance as heat is added to it or taken away from it. By knowing the heat added or removed and the resulting change in temperature, the heat capacity of the substance can be calculated using the equation:
C = ΔQ / ΔT
where C is the heat capacity, ΔQ is the amount of heat added or removed, and ΔT is the resulting change in temperature.
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A steel ball whose mass is 100 g is rolling at a rate of 2.8 m/sec. What is it’s momentum?
Answer:
The momentum of the steel ball is 0.28 kg m/sec.
Explanation:
The momentum of an object can be calculated using the formula: momentum = mass x velocity. In this case, the mass of the steel ball is 100 g, which is equivalent to 0.1 kg. The velocity of the ball is 2.8 m/sec. Plugging in the values into the formula, we get:
momentum = 0.1 kg x 2.8 m/sec
momentum = 0.28 kg m/sec
So the momentum of the steel ball is 0.28 kg m/sec.
which of the following is true of earth's orbit about the sun? question 57 options: it takes approximately the same time for earth as it does the rest of the planets in the solar system to orbit the sun. the orbit does not vary over millions of years. it is perfectly circular. it is elliptical.
Answer:
The orbit of the earth about the sun is very slightly elliptical
(about 91.5 to 93.5) million miles
a 1200kg car makes a right turn. the radius of this curve is 4.2m. if the maximum force of friction between the tires and the road is 2587.2n, what is the maximum velocity that the car can have before skidding?
The following equations provide the maximum speed at which an automobile may travel in a circular turn without skidding, (* g * r) = v max As a result, the car can travel at a maximum speed of about 3.23 m/s before skidding during the turn.
A car is a vehicle made specifically to move people and cargo over roads. Although electric and hybrid models have increased in popularity recently, internal combustion engines that use fossil fuels still provide the majority of the power for cars. The steering system, engine, gearbox, suspension, and brakes are a few of the crucial parts of a car. Modern vehicles frequently include a number of extra conveniences, such power windows, air conditioning, and sophisticated safety systems. The introduction of automobiles, which offer a practical and effective mode of transportation and enable the growth of new industries like travel and commuting, has had a significant impact on society.
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Two identical metal balls are suspended by insulating threads. Both balls have the same net charge. In this problem, do not assume the balls are point charges.(a) Draw a separate free-body diagram for each ball. Label the forces.(b) Suppose the charge on the second ball is reduced slightly so that it is less than that on the first ball. Predict whether the angle that ball 1 makes will be greater than, less than, or equal to the angle that ball 2 makes with the vertical. Explain.(c) Predict what will happen if the net charge on ball 2 is reduced to zero. Make a sketch to illustrate your answer.
In this situation, both balls will exert electrostatic force on each other in the first example.
Here, in the first scenario, both balls will interact electrostatically. The two balls will reject one another as a result of this electrostatic force.In addition, there will be a vertical downward gravitational force acting on the two balls.
Now that we know, the angle between the two balls will be greater as the horizontal force separates the two balls as the electrostatic force of repulsion between the two balls increases.
As we decrease the charge on one ball, the net electrostatic force between the two balls also reduces since we know that the net electrostatic force between two balls depends on the product of two charges.
The two balls then travel closer to one another as the angle between them diminishes. Additionally, we can see from the free body diagram of two balls that all of the forces acting on the balls are the same; as a result, both balls' angles of inclination with respect to the vertical are same.
Because of this, the angle created by ball l with the vertical equals the angle formed by ball 2.
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what horizontal force is required to hold a 3kg book vertically against the wall to prevent it from falling if the coefficient of static friction between the book and the wall is .3?
100N of horizontal force is required to hold a 3kg book vertically against the wall to prevent it from falling if the coefficient of static friction between the book and the wall is 0.3.
What is friction?
Friction between two surfaces causes kinetic energy from moving surfaces to be converted into thermal energy (that is, it converts work to heat). As demonstrated by the utilization of friction produced by rubbing pieces of wood together to start a fire, this feature can have dramatic effects. Every time there is motion with friction, such as when a viscous fluid is agitated, kinetic energy is transformed into thermal energy. Wear is a significant side effect of several types of friction that can result in deteriorated performance or component damage. The discipline of tribology includes friction.Friction=μN, where N is the normal force.
N = friction/μ.
N = mg/μ
m = 3 kg
g = 10m/s²
μ = 0.3
N = mg/μ
N = 300/3
= 100N
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A roller coaster features a near vertical drop of 135 meters. If the initial velocity was zero, the mass of the cart and riders was 1,500 kg, and the velocity at the end of the drop was 45 m/s, how much of the potential energy was converted into thermal energy?
Group of answer choices
392 kJ
579 kJ
468 kJ
518 kJ
The amount of potential energy that converted into thermal energy is 468 kJ.
What is energy?Energy, which is observable in the execution of labor as well as in the form of heat and light, is the quantitative quality that is transferred to a body or to a physical system in physics.
Energy is a preserved resource, energy can only be transformed from one form to another and cannot be created or destroyed.
Hence, form conservation of energy;
the amount of potential energy that converted into thermal energy =
Initial potential energy - final kinetic energy
= 1500 × 9.8 × 135 - 1/2×1500×45²
= 465750 Joule
= 468 kJ
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the next three questions refer to an object whose position versus time graph is shown above. at which point is its speed the largest?
Object whose position throughout time is represented by a graph Which point in position 6 has the highest speed
What is the definition of a velocity simple?A body and object's velocity determines the direction of its motion. Speed is fundamentally a scalar quantity. It is a vector term in its purest form. It refers to the rate at which distance varies.
We calculate velocity because?Any object's velocity is a measurement of how swiftly it moves. Therefore, it can be described as the shift in an object's position divided by time. Both a magnitude (a number) and a direction are associated with velocity. Meters a second (meter/second) is the unit used to measure velocity.
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you are about to bike down a large mountain. at the top of the mountain where the ambient pressure is 11.5 psi, your tire pressure gauge reads 28 psig. after riding down the mountain to sea level where the ambient pressure is 14.7 psi, what will the reading of your tire pressure gauge be?
At the top of the mountain where the ambient pressure is 11.5 psi, your tire pressure gauge reads 28 psig. After riding down the mountain to sea level where the ambient pressure is 14.7 psi. The tire pressure gauge at sea level will read 24.8 psig.
In this case, we can start by converting the gauge pressure at the top of the mountain (28 psig) to absolute pressure (pa) using the formula:
pa = gauge pressure + ambient pressure
pa = 28 psig + 11.5 psi
pa = 39.5 psi
At sea level, the ambient pressure is 14.7 psi, so the gauge pressure (pg) can be calculated as:
pg = pa - ambient pressure
pg = 39.5 psi - 14.7 psi
pg = 24.8 psig
So, the tire pressure gauge at sea level will read 24.8 psig.
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what is the minimum magnitude of an electric field that balances the weight of a plastic sphere of mass 6.4 g that has been charged to -3.0 nc?
Answer:
F = Q E force exerted by field on charge Q
F = M g weight of sphere
M g = Q E
E = M g / Q = .0064 kg * 9.80 m/s^2 / 3E-9 C
E = 2.09E7 Newtons/Coulomb
Use evidence and scientific reasoning to explain why the reading on the balance increased as Magnet 2 was lowered towards Magnet 1. Remember that Magnet 1's North pole was facing upwards while resting on the balance. In your response, be sure to describe the magnetic field interactions and the orientation of the magnetic poles for each magnet
The increase in the reading on the balance as Magnet 2 was lowered towards Magnet 1 was due to the interaction between the magnetic fields of the two magnets and the orientation of their magnetic poles, leading to an increase in the overall magnetic field strength.
When Magnet 2 was lowered towards Magnet 1, the reading on the balance increased because of the interaction between the magnetic fields of the two magnets.
Magnet 1, with its North pole facing upwards, creates a magnetic field with lines of force flowing out of the North pole and into the South pole. This creates a magnetic field that is stronger near the North pole and weaker near the South pole.
When Magnet 2 was brought near Magnet 1, the magnetic field of Magnet 2 interacts with the magnetic field of Magnet 1.
If the North pole of Magnet 2 is facing the South pole of Magnet 1, the magnetic fields of the two magnets will reinforce each other, leading to an increase in the overall magnetic field strength.
This increase in magnetic field strength can be detected by the balance, causing the reading to increase.
It's important to note that the orientation of the magnetic poles and the direction of the magnetic field lines play a crucial role in the magnetic field interactions between two magnets.
If the North pole of Magnet 2 was facing the North pole of Magnet 1, the magnetic fields would repel each other, causing the reading on the balance to decrease.
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a firefighter is helping the woman shown in the figure below. the woman's weight is 120 lb. what's the tension (in lb) in the rope connecting the woman to the firefighter?
The tension in the rope is equal to the weight of the woman, which is 120 lb. Since the woman is not accelerating, the forces acting on her must be balanced, meaning the tension in the rope must equal her weight. Therefore, the tension in the rope is 120 lb.
What is tension?
Tension is a state of mental or emotional strain, resulting from opposing forces or influences. It is a feeling of inner strain caused by a clash of emotions, ideas, or beliefs. It can also result from physical causes such as a lack of sleep, worry, physical exertion, and even hunger.
Tension can manifest itself in physical symptoms such as headaches, neck pain, muscle tightness, and fatigue. It can also lead to emotional problems such as anxiety, irritability, and depression. It is important to recognize and address tension in order to maintain good mental and physical health.
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What is a wave's wavelength if it was
traveling at 33 m/s and had a frequency of
11 Hz? What was the period?
Important Formulas:
[tex]v=\lambda f[/tex]
velocity(measured in m/s) = wavelength(measured in meters) * frequency(measured in hertz)
[tex]T=\dfrac{1}{f}[/tex]
period(measured in seconds) = 1 / frequency(measured in hertz)
__________________________________________________________
Given:
[tex]v=33m/s[/tex]
[tex]f=11Hz[/tex]
[tex]\lambda=?[/tex]
[tex]T=?[/tex]
__________________________________________________________
Wavelength:Rearrange formula for velocity to make wavelength the subject:
[tex]v=\lambda f[/tex]
[tex]\dfrac{v}{f} =\dfrac{\lambda f}{f}[/tex]
[tex]\lambda=\dfrac{v}{f}[/tex]
__________________________________________________________
Finding wavelength:
[tex]\lambda=\dfrac{v}{f}[/tex]
[tex]\lambda=\dfrac{33}{11}[/tex]
[tex]\lambda=3m[/tex]
__________________________________________________________
Period:Finding period:
[tex]T=\dfrac{1}{f}[/tex]
[tex]T=\dfrac{1}{11}[/tex]
[tex]T=0.09[/tex]
__________________________________________________________
Answer:
[tex]\boxed{\lambda=3 \texttt{ meters}}\\\boxed{T=0.09 \texttt{ seconds}}[/tex]
The physical properties of a mineral are largely due to its
Physical properties of a mineral is mainly due to the atomic structure as well as the crystalline structure of the mineral. Each mineral will have its own characteristic crystalline structure.
The important physical properties are color, crystal form, hardness, cleavage, density and specific gravity. All these properties are based on the arrangement of atoms. It atoms are tightly packed harder will be the mineral, greater the density.
The location of atoms or ions in the crystalline structure determines the cleavage. It happens through the line where the bonds are weakest. The more the space between the atoms, less the density and specific gravity.
So all these physical properties are imparted due to the atomic structure and arrangement of atoms in its crystal.
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an object has a 4 c charge. the object breaks into two pieces. one piece has a charge of -2 c. what is the exact charge (in c) of the other piece? do not include units with your answer.
The total charge to conserved that is Q=-6C,Now the sum of the total charges on both the pieces should be Q=Q1+Q2 = -6C,given that one charge is Q1 =2C, there fore -6 =2+Q2, There fore the charge on other piece is Q2 = -6-2 = -8C.
Can something have a 2.8 * 10 18 charge?In accordance with the principle of charge quantization, the total charge on an object must be an integer multiple of the basic charge, which is the fee on an electron (e).Not an integer, this.Thus, a body charged at 2.810-18 C is not possible.
How can you tell if something has a positive or negative charge?If there are greater proton than electrons, the charge density of the thing is positive.If an object has more electrons than protons, it has a negative net charge.If there are an equal number of protons and electrons, the thing is neutral.
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what is the uncertainty in the position (in m) of an electron moving 30.0 m/s accurate up to 0.00100 %
The uncertainty in the position of the electron moving at 30.0 m/s is 0.0003 m.
What is electron?Electron is an open-source framework that allows developers to create cross-platform desktop applications using web technologies like JavaScript, HTML, and CSS. It is based on the Chromium web browser and Node.js runtime, and developers can use it to build applications for Windows, Linux, and macOS. Electron is used by many popular applications, including Slack, Visual Studio Code, and Atom. It provides a range of powerful tools and APIs to help developers create feature-rich applications quickly and easily.
The uncertainty in the position of the electron is determined by the uncertainty in its velocity, which is 0.00100%.
This means that the uncertainty in the position of the electron is equal to 0.00100% of 30.0 m/s, or 0.0003 m.
Therefore, the uncertainty in the position of the electron moving at 30.0 m/s is 0.0003 m.
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a mass is suspended by a spring and subject to an input force function f(t). what is the relationship between the input force and the output velocity for the system? vs/fs
Equation describes the connection between a mass-spring system's input force and output velocity, m(d^2x/dt^2) + b(dx/dt) + kx = f(t).
The relationship between the input force and the output velocity of a mass-spring system is given by the equation m(d^2x/dt^2) + b(dx/dt) + kx = f(t), where m is the mass of the object, b is the damping coefficient, k is the spring constant, x is the displacement of the mass from its equilibrium position, and f(t) is the input force as a function of time.
Thus, the relationship between the input force and the output velocity is mediated by the mass, spring constant, damping coefficient, and displacement of the system.
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Which source of energy is used in a nuclear power station to generate electrical energy
Steam is produced when the cooling agent is heated by nuclear fusion. Turbines, or wheels turned by a flowing current, are rotated by the steam. The generators, which are engines that produce power, are driven by the turbines. Above process is followed in a nuclear power station to generate electrical energy.
Electrical energy is the energy that emerges from the kinetic or potential energy of charged particles. It is referred to be energy that has undergone transformation from overall electric potential energy.
Electrical energy can be described as the result of electrons travelling between two points. The movement of charged particles along or through a medium is known as electricity or current (like a wire).
The basic unit of electrical energy is the joule, also referred to as a watt-second. One joule of electrical energy is produced when one amp of current flows through a circuit for one second while a potential difference of one volt is applied across it.
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4. For each of the following cases, indicate whether the work done on the second object in each example will have a positive or a negative value.
5. If a neighbor pushes a lawnmower four times as far as you do but exerts only half the force, which one of you does more work and by how much?
c. Air exerts a force on a parachute as the parachutist falls to Earth.
b. A rope exerts a force on a bucket as the bucket t is raised up a well.
a. The road exerts a friction force on a speeding car skidding to a stop.
Work done on an object- Measure of energy transfer when an object is moved over a distance by an external force, at least some of which is applied in the displacement direction.
a. When the road exerts a friction force on a speeding car skidding to a stop, the work done by the friction force is negative. This is because the friction force opposes the motion of the car and slows it down. When the force is in the opposite direction of the motion of an object, the work done by the force is negative.
b. When a rope exerts a force on a bucket as it is raised up a well, the work done by the rope is positive. The force of the rope is in the same direction as the displacement of the bucket, so the work done by the rope is positive. When the force is in the same direction as the motion of an object, the work done by the force is positive.
c. When air exerts a force on a parachutist as they fall to Earth, the work done by the air is negative. The force of air resistance opposes the motion of the parachutist and slows them down, so the work done by the air is negative.
Comparison of work done:
The work done by a force is defined as the product of the force and the distance traveled by an object.
If a neighbour pushes a lawnmower four times as far as you do but exerts only half the force, neighbour does more work. The work done by neighbour is four times the distance traveled by the lawnmower multiplied by half the force exerted .
To find the exact difference in the amount of work done, calculate the product of the distance traveled by the lawnmower and the difference in the force exerted by each person. Assuming that person pushed the lawnmower a distance of d units and exerted a force of f units. Then, neighbour pushed the lawnmower a distance of and exerted a force of
The work done by person is given by the equation
The work done by neighbour is given by the equation
The difference in the amount of work done is given by the equation W2 -
So, neighbour did units more work than the person has done.
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if the staggered and eclipsed populations of ethane had only differed 30-fold instead of the almost three orders-of-magnitude, what would the energy difference between them be?
The energy difference between the staggered and eclipsed populations of ethane depends on various factors such as bond length, bond angle, and bond energy.
In general, the energy difference between these two populations is proportional to the difference in their molecular structure.]
If the difference in molecular structure between the staggered and eclipsed populations of ethane had only been 30-fold instead of the almost three orders of magnitude, it would result in a proportionally smaller energy difference between them. However, without more specific information about the specific molecular structure and bond energies involved, it is not possible to determine the exact energy difference.
In general, it's important to note that the magnitude of the energy difference between the staggered and eclipsed populations of ethane can be influenced by various factors such as temperature, pressure, and the presence of other molecules. These factors can affect the magnitude of the energy difference and make it difficult to determine an exact value.
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a man skis down from the top of a hill 1450.0 m high, starting from rest. if he loses 70% of his initial mechanical energy to friction during his descent, what is his speed in m/s at the base of the hill?
Speed of a man at the base of the hill is 93.27m/sec if a man skies down from the top of hill 1450m high.
In actual sciences, mechanical energy is the amount of possible energy and motor energy. The rule of preservation of mechanical energy expresses that in the event that a disengaged framework is subject just to moderate powers, the mechanical energy is consistent. In the event that an item moves the other way of a moderate net power, the potential energy will increment; and if the speed (not the speed) of the item changes, the dynamic energy of the item likewise changes.
In every single genuine framework, nonetheless, non-conservative powers, for example, frictional powers, will be available, however in the event that they are of irrelevant greatness, the mechanical energy changes nearly nothing and its protection is a valuable estimation. In flexible crashes, the active energy is moderated, yet in inelastic impacts some mechanical energy might be changed over into nuclear power. The comparability between lost mechanical energy and an expansion in temperature was found by James Prescott Joule.
At 1450m height,mechanical energy is equal to potential energy. Potential energy is all due to position of man.
Potential energy=mgh where m is the mass and g is the acceleration due to gravity and h is the height.
So,potential energy=m×10×1450Joules.
Now,when he starts from rest and losses 70% of energy in friction,it means 30% mechanical energy will convert into kinetic energy.
So,30% of mechanical energy=kinetic energy of man.
=>(30/100) ×m×10×1450=(1/2)×m×v²
=>3×1450×2=v²
=>v²=8700
=>v=√8700
=>v=93.27m/sec.
Hence,speed of man at base is 93.27m/sec.
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The type of function that describes the amplitude of damped oscillatory motion is _______. quadratic sinusoidal inverse exponential linear
Because we already know that this function is exponential, that sort of function that describes the amplitude of damped oscillatory motion is exponential. [tex]y=A\times e^{\frac{-b}{2m} }[/tex][tex]\times cos\omega t[/tex]
The maximum displacement or distance a point on a vibrating body or wave can move in relation to its equilibrium location is referred to as the amplitude in physics. It is equivalent to the half-length of the vibration path. The bob swings halfway across the pendulum's amplitude when it shifts from one side to the other. Waves are produced by vibrating sources, and the amplitude of the waves is inversely proportional to the amplitude of the source. The largest deviation of any point on a transverse wave, such as the wave on a plucked string, from its position when the wave is at rest, is used to determine the wave's amplitude.
[tex]y=A\times e^{\frac{-b}{2m} }[/tex][tex]\times cos\omega t[/tex] [tex]\rightarrow(1)[/tex]
here function is [tex]A\times e^{\frac{-b}{2m} }[/tex] is amplitude
as per equation ( 1 ) it is exponential
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the index of refraction for red (660 nm) and green (550 nm) light respectively in flint glass is 1.662 and 1.674. by how much do the critical angles for red and green light differ in flint glass surrounded by air?
The sine refraction of the two angles, or sin(c, red) - sin(c, green), is equal to the difference between the critical angles for red and green light.
How does critical angle work?The critical angle is the angle of incidence (angle between the incoming light and the surface normal) where no more refraction takes place and the refracted ray is just skimming the surface. Beyond this angle, the light won't enter the second medium and will instead begin to reflect back into the first.
What is the flint glass' violet refractive index?Flint glass has red and violet light refractive indices of 1.613 and 1.632, respectively. The refractive indices of the materials define the critical angle.
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a rotating fan completes 1200 revolutions every minute. consider the tip of a blade, at a radius of 0.15 m. (a) through what distance does the tip move in one revolution? what are (b) the
The angular velocity of the tip of the blade is angular velocity = 2 * π * 1200 rotations / minute = 7539.82 rad/min.
(a) To find the distance the tip of the blade moves in one revolution, we can use the circumference of a circle:
distance = 2 * π * radius = 2 * π * 0.15 m = 0.94 m
So, the tip of the blade moves a distance of 0.94 meters in one revolution.
(b) To find the linear velocity of the tip of the blade, we can use the formula for linear velocity:
linear velocity = distance / time = 2 * π * radius * rotations / minute
Since the fan completes 1200 revolutions per minute, the linear velocity is:
linear velocity = 2 * π * 0.15 m * 1200 rotations / minute = 94.25 m/s
To find the angular velocity of the tip of the blade, we can use the formula for angular velocity:
angular velocity = 2 * π * rotations / minute
So, the angular velocity of the tip of the blade is:
angular velocity = 2 * π * 1200 rotations / minute = 7539.82 rad/min.
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Over several cycles, a refrigerator does 1.51 × 10^4 J of work on the refrigerant. The refrigerant in turn removes 7.55 × 10^4 J as heat from the air inside the refrigerator.
a. How much energy is transferred as heat to the outside air?
b. What is the net change in the internal energy of the refrigerant?
c. What is the amount of work done on the air inside the refrigerator?
d. What is the net change in the internal energy of the air inside the refrigerator?
a) The heat energy transferred to the outside air is 6.04 × 10^4 J.
b) The net change in the internal energy of the refrigerant is 1.51 × 10^4 J.
c) amount of work done inside is -1.51 × 10^4 J.
d) The net change in the internal energy is 9.06 × 10^4 J
Refrigerant Energy Analysisa. The amount of energy transferred as heat to the outside air is the difference between the amount of heat removed from the air inside the refrigerator and the work done on the refrigerant: 7.55 × 10^4 J - 1.51 × 10^4 J = 6.04 × 10^4 J.
b. The net change in the internal energy of the refrigerant is the work done on the refrigerant: 1.51 × 10^4 J.
c. The amount of work done on the air inside the refrigerator is negative of the work done on the refrigerant, as energy is transferred from the air to the refrigerant: -1.51 × 10^4 J.
d. The net change in the internal energy of the air inside the refrigerator is the heat removed from the air minus the work done on the air: 7.55 × 10^4 J - (-1.51 × 10^4 J) = 9.06 × 10^4 J.
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A 66.9 kg high jumper leaves the ground with a vertical velocity of 8.9 m/s. How high can he jump? The acceleration of gravity is 9.8 m/s^2. Answer in units of m.
Answer:
Below
Explanation:
All of the Kinetic energy ( 1/2 mv^2) will be converted to Gravitational Potential Energy ( mgh) ....so
1/2 m v^2 = mgh divide both sides of the equation by 'm'
1/2 v^2 = gh ( not that the mass of the jumper is irrelevant !)
(1/2 v^2 ) /g = h
(1/2) (9.8 m/s)^2 / (9.8 m/s^2 ) = 4.9 m
a refracting and reflecting telescope have the same diameter; the refracting telescope will be much longer than the reflector. group of answer choices true false
A refracting and reflecting telescope have the same diameter; the refracting telescope will be much longer than the reflector'
The answer choice is true.
Because refracting and reflecting telescopes are designed differently, they can have different lengths even though they have the same diameter. Refracting telescopes, commonly known as refractors, bend and concentrate light to create images. The length of a refractor is mostly dictated by the size of its objective lens, which is the primary light-gathering lens at the front of the telescope. A bigger lens necessitates a longer tube in order to accommodate it, resulting in a greater overall length of the telescope.
Reflecting telescopes, also known as reflectors, on the other hand, employ mirrors to gather and focus light. The length of a reflector telescope is dictated by the size of its primary mirror. A longer optical tube is required to accommodate a larger mirror, but it does not have to be as long as a refractor of the same diameter because the light from the mirror travels a shorter distance before reaching the eyepiece.
Even if a refractor and a reflector have the same diameter, the refractor will be considerably longer due to the length necessary to accommodate its huge lens, but the reflector will have a lower overall length since the light it gathers travels a shorter journey.
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Rank the boxes on the basis of the magnitude of the normal force acting on them.
Rank from largest to smallest. To rank items as equivalent, overlap them.
1) 130N--->7kg
2) 150N--->1kg
3) 150N--->7kg
4) 120N--->3kg
5) 140N--->5kg
6) 140N--->3kg
150N--->7kg, 5) 140N--->5kg, 1) 130N--->7kg, 4) 120N--->3kg, 6) 140N--->3kg and 2) 150N--->1kg. The normal force acting on each box is determined by the weight of the box.
What is force?
Force is an influential physical quantity that can cause an object to change its velocity and/or shape. It is a vector quantity meaning it has both magnitude and direction.
Forces can cause objects to accelerate, decelerate, or change direction. Examples of forces include gravitational force, electromagnetic force, and frictional force. Force is measured in units of Newtons (N). Force is an important concept in physics as it is one of the fundamental concepts of the subject.
Since the weight of each box is determined by its mass, the box with the largest mass will have the greatest.
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