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Physics Questions and Answers October 14, 2019

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An ideal heat - engine is to be used in an environment where the ambient temperature is 3 2 . 0 C . What should be the minimum temperature of the hot heat reservoir in order to reach at least 4 1 . 6 percent efficiency with the heat - engine? ( Give your answer in Celsius. ) 2 . 4 9 1 0 2

How does the momentum of an electron traveling at 0 . 9 8 c compare with its classical momentum? p r e l a t i v e p c l a s s i c =
How does the momentum of an electron traveling at

The energy of an electromagnetic wave scales with the electric field ( E ) as E 1 E 2 E 2 1 E E 2 1 E 2
The energy of an electromagnetic wave scales with

The distance from the eye's lens to the retina for a given person is 3 . 0 cm . This person clearly sees an object 2 7 cm in front of his eye. The focal length of the eye's lens in this case is + 2 . 7 c m + 3 c m - 3 . 3 7 c m + 3 . 3 7 c m - 3 c m - 2 . 7 c m
The distance from the eye's lens to the retina

To accurately measure the temperature of an object with a pyrometer you must know the object's... transmittance. emissivity. blackbody coefficient. irreverence. reflectivity.
To accurately measure the temperature of an

if the intensitu of a sound wave doibles, then bu how much does the sound level increase

A capacitor of 6 5 FF consists of two square plates and is connected to an AC voltage source with VrmsVrms = 1 0 . 0 VV and = 1 2 0 0 rad / srad / s . The plates are moved so the gap between the plates increases by 5 . 5 times. What is the new IrmsIrms? Express your answer with the appropriate units. Activate to select the appropriates template

How would you say 'you ( PL ) left' in Language a ? nixeeli xatwari nateeli xoqwari xixeeli
How would you say 'you ( PL ) left' in Language a

A proton located at the origin is accelerated in the - y direction for a brief time. Part 1 ( a ) How much time passes before a detector located at detects a radiative electric field? s Attempts: 0 of 6 Using multiple attempts will impact your score. 4 0 % score reduction after attempt 3 Part 2 Part 3 Search
A proton located at the origin is accelerated in

Consider the wave equation: y ( x , t ) = Asin ( k x - t ) It provides information about which of the following: A . The frequency of the wave B . The wavelength of the wave C . The time period of the wave D . The wave velocity E . All of the above
Consider the wave equation: y ( x , t ) = Asin (

What is the direction of ball 1 in a reference frame that moves with ball 2 ? left right the ball is at rest
What is the direction of ball 1 in a reference

Consider water moving through a firehose. When the fluid moves from the wider region to the narrow region, the fluid speeds up in accordance with continuity ( v 2 > v 1 ) . Now applying Bernoulli's equation to this context, we can say that the pressure in the wider region, P 1 , is greater than, less than, or equal to the pressure in the narrow

A sphere radiates energy at a rate of 1 . 1 0 J / sJ / s when its temperature is 1 0 0 C C . At what rate will it radiate energy if its temperature is increased to 2 0 0 C C ? ( Neglect any heat transferred back into the sphere. ) 6 . 8 7 5 1 0 2 J / sJ / s 2 . 2 0 J / sJ / s 2 . 8 4 J / sJ / s 1 7 . 6 J / s

i ) A lamp hangs vertically from a cord in a descending elevator that decelerates at 1 . 6 m / s 2 . Calculate the lamp s mass if the tension in the cord is 6 0 N . Calculate the cord's tension when the elevator ascends with an upward acceleration of 2 . 4 m / s 2 . ( 1 0 marks )

comparing the mutual inductance of M 1 , 2 of coil 1 with respect to coil 2 with the mutual inductance of M 2 , 1 of coil 2 with respect to coil 1 it turns out that a . ) M 1 , 2 is always greater b . ) M 2 , 1 is always greater c . ) M 1 , 2 is less than M 2 , 1

If there was no dark energy, no inflation, and the density in the early universe were 0 . 0 0 1 % above the critical density the universe Would quickly come to have the critical density Would quickly have slowed down, come to a stop, and had a big crunch long ago Have expanded so quickly that stars could never have formed Would have developed a
If there was no dark energy, no inflation, and

2 Multiple Choice 1 point Consider two gasses: Methane C H 4 and Helium H e . Both gases are at the same temperature. Which one has the higher kinetic energy per particle and which one has the higher speed? Helium has the higher kinetic energy and the higher speed They have the same kinetic energy, but Methane has the higher speed Helium has the
2 Multiple Choice 1 point Consider two gasses:

A spacer is cut from a playing card of thickness 3 . 0 3 1 0 - 4 m and used to separate one end of two rectangular, optically flat, 2 . 9 0 cm long glass plates with n = 1 . 5 0 , as in the figure below. Laser light at 5 9 4 nm shines straight down on the top plate. ( a ) Count the number of phase reversals for the interfering waves. ( b )
A spacer is cut from a playing card of thickness

A very thin layer of corn oil ( What is the energy of each of the two photons produced in a protonantiproton annihilation? Use the following Joules - to - electron - Volts conversion 1 e V = 1 . 6 0 2 1 0 - 1 9 J . The rest mass of a proton is 1 . 6 7 1 0 - 2 7 k g . MeV
A very thin layer of corn oil ( What is the

Problem 2 A bomb of mass m . = 1 0 k g is initially at rest. It explodes into three pieces. One piece of mass m 1 = 5 k g moves at a speed of 4 m s to the left. Another piece of mass m 2 = 3 k g moves at a speed of 4 m s in the positive y direction. Find the x and y components of the velocity of the third piece.
Problem 2 A bomb of mass m . = 1 0 k g is

A 1 2 5 N sign is supported by two ropes. One rope pulls up and to the right 1 = 2 8 . 5 above the horizontal with a tension T 1 , and the other rope pulls up and to the left 2 = 5 2 . 5 above the horizontal with a tension T 2 , as shown in the figure. Find the tensions T 1 and T 2 . T 1 = N T 2 = N
A 1 2 5 N sign is supported by two ropes. One

A current of 2 . 8 5 A is flowing through a 1 9 7 1 turn solenoid of length L = 3 0 . 5 cm . What is the magnitude of the magnetic field inside the solenoid? ( in T ) 3 . A 3 . 1 4 4 1 0 3 B 4 . 1 8 1 1 0 3 C 5 . 5 6 1 1 0 3 D 7 . 3 9 7 1 0 3 E 9 . 8 3 8 1 0 3 F 1 . 3 0 8 1 0 2 G 1 . 7 4 0 1 0 2 H 2 . 3 1 4 1

A material is warmed to a temperature 2 / 3 of the way from absolute zero to the material s melting temperature. You grab the ends of the material and pull. The likely behavior is: Group of answer choices The material will not deform. The material will deform plastically ( not snapping back when you let go ) under a small pull, and will deform

A tractor - trailer is siting still motionless. The mass of the trailer is 4 x the mass of the tractor. If the tractor accelerates what force does the trailer apply to the tractor

Both types of problems solved in this practice set involved several steps. However in one problem you added the steps together and in another you set them equal to each other. How do you know when to add them up and when to set them equal

A small object with mass mm = 0 . 0 9 0 0 kgkg moves along the + x + x - axis. The only force on the object is a conservative force that has the potential - energy function U ( x ) = x 2 + x 3 U ( x ) = x 2 + x 3 , where = 9 . 0 0 J / m 2 J / m 2 and = 0 . 3 0 0 J / m 3 J / m 3 . The object is released from rest at small xx . Part A When the

Light of wavelength 5 8 5 . 0 0 nm is incident normally on a diffraction grating, and the fifth - order maximum is observed to be 2 8 . 0 from the normal. How many slits N per millimeter are marked on the grating? N = slits per millimeter
Light of wavelength 5 8 5 . 0 0 nm is incident

What is approximate energy scale for electroweak interaction?

A 2 - k g block on a frictionless inclined plane at 4 0 has a cord attached to a pulley of mass 1 kg and radius 2 0 cm ( see Figure 9 below ) . us ( a ) What is the acceleration of the block down the plane? ( b ) What is the work done by the gravitational force to move the block 5 0 cm ? Page | 1
A 2 - k g block on a frictionless inclined plane

( 5 pts ) 1 0 . A metal sphere radiates energy at a rate f 3 . 0 0 J s when the temperature of the sphere is 2 7 . 0 C . At what rate does the sphere radiate energy if its temperature is increased to 7 7 . 0 C ?
( 5 pts ) 1 0 . A metal sphere radiates energy at

? _ _ _ _ _ _ _ _ _ _ i s a t y p e o f l i n e a r r e l a t i o n s h i p w h e r e a l l o b s e r v a t i o n s f a l l a l o n g a s t r a i g h t l i n e .

The primary coil of a transformer has 1 0 loops and is connected to an outlet providing 1 2 0 volts, resulting in a current through the primary coil of 1 amp . If the secondary coil has 1 0 0 loops, the output voltage from the secondary coil would be with an output curren [ Select ] 1 0 x the current of the primary = 1 0 amps 1 1 0 th the current
The primary coil of a transformer has 1 0 loops

Three identical very dense masses of 5 4 0 0 kgkg each are placed on the x axis. One mass is at x 1 x 1 = - 1 2 0 cmcm , one is at the origin, and one is at x 2 x 2 = 4 1 0 cmcm .

A tow truck is pulling a car out of a ditch by means of a steel cable ( Y = 2 . 0 x 1 0 ^ 1 1 N / m ^ 2 ) .

Which of the following statements is correct or true for a gas under conditions such as its reduced pressure 2 . 0 and its reduced temperature is 1 . 1 ? Group of answer choices It has a compressibility factor around 0 . 3 9 . It cannot reasonably be treated as an ideal gas. All of these describe the gas under the specified conditions. It has a

An electromagnetic wave with a frequency of 5 . 2 0 1 0 1 4 HzHz propagates with a speed of 2 . 3 2 1 0 8 m / sm / s in a certain piece of glass.

An object attached to a spring undergoes simple harmonic motion modeled by the differential equation my ' ' + ky = 0 where y ( t ) is the displacement of the mass ( relative to equilibrium ) at time t , m is the mass of the object, and k

If the block is displaced 8 0 mmmm downward from its equilibrium position and given a downward velocity of 0 . 8 0 m / sm / s , determine the equation which describes the motion. Assume that positive displacement is downward. y = 0 . 1 2 0 sin 6 . 6 8 t + 8 . 0 0 1 0 2 cos 6 . 6 8 ty = 0 . 1 2 0 sin 6 . 6 8 t + 8 . 0 0 1 0 2 cos 6 . 6 8 ty = 0 . 1

A uniform cube with mass 0 . 3 0 0 kg and volume 0 . 0 2 7 0 m 3 is sitting on the floor. A uniform sphere with radius 0 . 3 0 0 m and mass 0 . 9 0 0 kg sits on top of the cube. Part A How far is the center of mass of the two - object system above the floor? Express your answer with the appropriate units. Activate to select the appropriates

The continuity equation is the result of application of the following law to the flow field. Option 1 , first law of thermodynamics. Option 2 , conservation of mass. Option 3 , Newton's second law. Option 4 , conservation of energy.

A loudspeaker having a diaphragm that vibrates at 9 7 0 Hz is traveling at 6 5 . 0 m / s directly toward a pair of holes in a very large wall in a region for which the speed of sound is 3 4 4 m / s . You observe that the sound coming through the openings first cancels at 1 4 . 4 with respect to the original direction of the speaker when observed

Let the K coordinate system have an origin at your location on the ground with the z - axis going straight up into the air

A 7 7 g , 3 0 - cm - long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 1 4 g ball of clay traveling horizontally at 2 . 6 m / s hits and sticks to the very bottom tip of the rod. To what maximum angle, measured from vertical, does the rod ( with the attached ball of clay ) rotate?

The supermassive black hole at the center of our Milky Way galaxy has a mass that is about 4 million times the mass of our Sun. Suppose that you are 1 . 7 meters tall and you are falling freely, feet - first, toward that black hole. At the moment that your feet cross the event horizon, your head is farther from the center than your feet are, by 1

The maximum electric field at a distance of 3 8 m from an isotropic point light source is 4 V / m . ( A ) What is the maximum value of the magnetic field at that point? T ( B ) What is the average intensity of the light at that point? W / m 2 ( C ) What is the power of the light source? W

6 . A student repeating Coulomb's experiment made the following observations: Given charges 2 . 3 6 * 1 0 ^ - 8 and 5 * 1 0 ^ - 1 5 and a separation of 1 . 0 0 5 7 cm , the electric force between them is 1 * 1 0 ^ - 6 N . What value of k does this indicate, and what are two possible reasons the student found a different value from the known

A cylindrical glass of mass m 1 = 1 . 1 7 kg slides along a frictionless kitchen countertop due to an initial applied force whose magnitude depends on time: F ( t ) = bt 2 , with b = 5 3 . 9 N / s 2 . ( a ) ( 5 points ) What is the speed communicated to the glass by that force if the force was applied for 0 . 8 s ? ( b ) ( 5 points ) As that glass

You're filling up your water bottle at one of the many water fountains on campus, when you start wondering how many water fountains there are on campus and how much it costs the university to run them every day. Each water fountain gets water from a pipe in the wall, and then, similar to a fridge, electricity is required to run a chiller to cool

A certain bungee cord has a relaxed length of 2 0 m . When Kelly hangs from the cord, it becomes 2 2 . 4 5 m long. What would Kelly's oscillation period be after being set into a vertical oscillation of amplitude 1 . 0 m while hanging from this cord? Is it important that the amplitude of oscillation is 1 . 0 m ?

Question 1 5 6 . 6 7 pts You are riding a rollercoaster going around a vertical loop, on the inside of the loop. If the loop has a radius of 5 0 meters, how fast must the cart be moving in order for you to feel three times as heavy at the top of the loop? 4 4 . 3 m s 3 8 . 4 m / s 4 9 . 5 m s 3 1 . 3 m s
Question 1 5 6 . 6 7 pts You are riding a

You have three current carrying wires, each carrying a 0 . 2 5 A current. Each wire is 5 0 cm long, and they are located in a plane, as shown in the diagram. The wires on top and bottom have current flowing to the right, and the one in the center has current flowing to the left. Wire spacing d is 2 . 5 cm . What is the net force on the wire at the
You have three current carrying wires, each

an acceleration voltage of 1 5 . 0 kv is used to accelerate ions

At one instant, force = 4 . 0 acts on a 0 . 2 5 kg object that has position vector = 2 . 0 2 . 0 and velocity vector = 5 . 0 + 5 . 0 / . About the origin and in unit - vector notation, what are

How much energy is stored in a 2 . 5 0 - cmcm - diameter, 1 2 . 0 - cmcm - long solenoid that has 2 0 0 turns of wire and carries a current of 0 . 8 0 0 AA ? Express your answer with the appropriate units. View Available Hint ( s ) for Part A Activate to select the appropriates template from the following choices. Operate up and down arrow for

The steering wheel of a car has a radius of 0 . 1 9 5 m , while the steering wheel of a truck has a radius of 0 . 2 7 7 m . The same force is applied in the same direction to each. What is the ratio of the torque produced by this force in the truck to the torque produced in the car?
The steering wheel of a car has a radius of 0 . 1

A helicopter pilot needs to travel to a regional airport 2 4 miles away. She flies at an actual heading of \ ( \ mathrm { N } 1 6 . 2 6 ^ { \ circ } \ mathrm { E } \ ) with an airspeed of 1 1 0 mph , and there is a wind blowing directly east at 1 9 mph . ( a ) Determine the compass heading that the pilot needs to reach her destination. ( b ) How
A helicopter pilot needs to travel to a regional

A potter's wheel, with rotational inertia 4 6 k g * m 2 is spinning freely at 4 0 rpm . The potter drops a lump of clay onto the wheel, where it sticks a distance 1 . 2 m from the rotational axis. If the subsequent angular speed of the wheel and clay is 3 2 rpm what is the mass of the clay?
A potter's wheel, with rotational inertia 4 6 k g

1 points Save Answer An object is released from rest at height h above the ground. How does its kinetic energy just before it hits the ground compare with its initial potential energy if we include air resistance? The kinetic and potential energies are the same. The kinetic energy is less than the potential energy. The kinetic energy is greater
1 points Save Answer An object is released from

A straight stream of protons passes a given point in space at a rate of 1 . 9 1 0 9 protons / s What magnetic field do they produce 2 . 3 m from the beam

Two disks, A & B , have the same momentum. The radius of disk A is twice the radius of disk B ; both disks have the same mass. If the angular speed of disk A is , what is the angular speed of disk B ? 4 2 1 2 1 4
Two disks, A & B , have the same momentum. The

What is the work done by a force of 1 0 N moving an object 5 meters in the direction of the force? A ) 1 0 J B ) 2 0 J C ) 3 0 J D ) 5 0 J

Quantitative Analysis ART F: When the box is only being accelerated forward, a m a x has one value. ( a m a x is the maximum acceleration the forklift can have before the box begins to slide. ) When the box is both accelerating forward and down, a m a x is less. Explain in a clear, coherent paragraph - length response why this is true.
Quantitative Analysis ART F: When the box is only

A current of 1 0 mA is in a circular loop with 1 turn of wire. The loop produces a magnetic field of 1 . 2 6 ' 1 0 - 8 T . If the number of turns of wire in the loop is increased to 8 , what is the magnetic field produced? 1 . 2 6 ' 1 0 - 8 T 1 . 0 1 1 1 0 - 7 T 1 . 5 8 ' 1 1 0 - 9 T Not enough information
A current of 1 0 mA is in a circular loop with 1

QUESTION 1 0 1 0 0 points Consider an object in uniform circular motion ( constant speed along a circular path ) . Which of the following statements is correct? a . The object has no acceleration. b . The centripetal force on the object balances the centrifugal force on the object. c . The net force on the object is directed away from the center
QUESTION 1 0 1 0 0 points Consider an object in

Question 7 :Blocks and , each with a mass of , are hung from the ceiling of an elevator by ropes 1 and 2 . What is the force exerted by rope 1 on block when the elevator is traveling upward at a constant speed of ? Answer Choices: 1 . 2 . 3 . 4 . 5 . Would you like the solution or the final answer?

a boxer punches his opponent in the head. which experiences the smaller force?

CH - 1 3 - 2 : ( 1 5 points ) The Sun and Earth each exert a gravitational force on the Moon What is the ratio F S u n F E a r t h of these two forces? ( The average Sun - Moon distance is equal to the Sun - Earth distance. ) ( Use values from back of book, as necessary. ) Does this answer surprise you? Most Americans will try to tell you "that
CH - 1 3 - 2 : ( 1 5 points ) The Sun and Earth

What is the term used for the phenomena we experience when we walk around a patch of grass and it appears brighter or darker depending upon our viewing angle in relation to the angle of the sun

An electron is moving with a speed of 9 . 0 0 1 0 6 m / s .

A neon sign requires 1 1 kV for its operation. A transformer is used to raise the voltage from the line voltage of 2 2 0 V ( rms ) AC to 1 1 kV ( rms ) AC .

Pablo is running in a half marathon at a velocity of 2 m / s . Another runner, Jacob, is 4 8 meters behind Pablo with the same velocity. Jacob begins to accelerate at 0 . 0 4 m / s 2 . ( a ) How long does it take Jacob to catch Pablo ( in s ) ? s ( b ) What is the distance ( in m ) covered by Jacob? m ( c ) What is Jacob's final velocity ( in m /

A golf ball of mass m = 0 . 1 7 kg is dropped from a height h . It interacts with the floor for 1 = 0 . 1 7 5 s , and applies a force of F = 1 3 . 5 N to the floor when it elasticallycollides with it .

A wave on a string is described by D ( x , t ) = ( 2 . 8 cm ) sin [ 2 ( x / ( 8 . 4 m ) + t / ( 0 . 1 4 s ) + 1 ) ] , where x is in m and t is in s . At t = 0 . 4 9 s , what is the displacement of the string at x = 4 . 9 m ?

What is the amplitude of the magnetic field a distance of 4 . 0 0 km away from a radio station that is broadcasting isotropically ( in all directions ) with a power of 3 5 . 0 kW ?

what is the x component Ex of the electric field at ( x = 0 , y = 0 , z = 0 ) at t = 0

At some instant, the blood pressure in the heart is 1 . 8 1 0 4 Pa . Assume the density of blood is the same as water. What is the pressure in an artery 0 . 4 0 m above the heart, treating the blood as a nonviscous fluid?

a 2 0 0 g hockey puck is sliding down a ramp inclined at 3 5 degree angle, the coefficients of static and kinetic friction between the hockey puck and the ramp are u = 0 . 5 0 and u _ k = 0 . 3 0 respectively ( a ) what is the normal force on the puck due to the ramp ( b ) what is the acceleration of the puck

oherent light of frequency 6 . 3 6 1 0 1 4 HzHz passes through two thin slits and falls on a screen 8 8 . 0 cmcm away. You observe that the third bright fringe occurs at 3 . 0 9 cmcm on either side of the central bright fringe. Part A How far apart are the two slits? Activate to select the appropriates template from the following choices. Operate

Why does steam at 1 0 0 deg C produce a far worse burn than water at 1 0 0 deg C ? Group of answer choices Steam has a higher specific heat because it can be pressurized Steam has 5 4 0 cal / g more energy than water steam is invisible

Monochromatic light from a distant source is incident on a slit 0 . 8 1 5 mm wide. On a screen 2 . 1 3 m away, the distance from the central maximum of the diffraction pattern to the first minimum is measured to be 1 . 3 5 mm .
Monochromatic light from a distant source is

Formula del potencial electrico

A building inspector standing on the top floor of a building wishes to determine the depth of the elevator shaft. They drop a rock from rest and hear it hit bottom after 2 . 8 7 s . ( a ) How far ( in m ) is it from where they drop the rock to the bottom of the shaft? The speed of sound at the temperature of air in the shaft is 3 3 6 m / s . (

You drop a stone down a well. You hear the splash 1 . 6 3 s later. How deep is the well? The speed of sound in air is 3 4 3 m / s . A ) 6 . 9 6 m B ) 1 8 . 8 m C ) 2 0 . 0 m D ) 2 0 . 2 m E ) 1 2 . 5 m

speed of transverse wave on a string is 1 6 0 when string tension 2 3 0 changed to raise wave speed to 2 3 0

A cart attached to an ideal spring with a force constant ( spring constant ) of oscillates on a horizontal, frictionless track. At time , the cart is released from rest at position from the equilibrium position. ( a ) What is the frequency of the oscillations of the cart? ( b ) Determine the maximum speed of the cart. Where does the maximum speed

A rectangular glass window pane on a house has a width of 1 . 2 m , a height of 1 . 9 m , and a thickness of 0 . 5 6 cm . Find the energy transferred through the window by conduction in 1 2 hours on a day when the inside temperature of the house is 2 2 C and the outside temperature is 2 . 0 C . Take surface air layers into consideration.

A photon with a wavelength of 3 . 7 0 1 0 1 3 mm strikes a deuteron, splitting it into a proton and a neutron. Calculate the kinetic energy released in this interaction. Express your answer in megaelectronvolts. Assuming the two particles share the energy equally, and taking their masses to be 1 . 0 0 uu , calculate their speeds after the

Bernoulli's Principle states: A force will be directed from areas of high pressure to low pressure; this creates lift True False
Bernoulli's Principle states: A force will be

An air bubble of radius 8 . 0 cm is released from the mouth of a diver. At the diver's depth the pressure is 1 . 1 5 atm . ( We ' ll learn in chapter 1 3 why the diver's depth affects the pressure. ) As it rises to the surface, the air inside the bubble does 2 0 . 3 8 J of work. The bubble rises so quickly to the surface that this process can be
An air bubble of radius 8 . 0 cm is released from

What happens to a wave when it is refracted? the wave is bent the wave is transmitted the wave is reflected the wave is radiated
What happens to a wave when it is refracted? the

The coefficient of static friction for the tires of a race car is 0 . 7 5 0 and the coefficient of kinetic friction is 0 . 5 6 0 . The car is on a level circular track of 8 0 . 0 m radius on a planet where g = 2 . 4 5 ( m ) s 2 compared to Earth's g = 9 . 8 0 ( m ) s 2 . If the car is to be able to travel at the same speed on the planet as on
The coefficient of static friction for the tires

Please answer 6 and 7 On a hot summer day, the temperature of air in Arizona reaches 1 0 4 F . What is the speed of sound in air at this temperature? ( The speed of sound at 0 C is 3 3 1 m s . Use the conversion noc = 2 7 3 k ac necessary. ) m s Need Help? [ - / 1 0 Points ] SERCP 1 1 1 4 . 3 . P . 0 0 5 . 0 / 5 Submissions Used A group of hikers
Please answer 6 and 7 On a hot summer day, the

A 1 4 0 - kg object and a 4 4 0 - k g object are separated by 4 . 7 0 m . ( a ) Find the magnitude of the net gravitational force exerted by these objects on a 4 1 . 0 - kg object placed midway between them. ( b ) At what position ( other than an infinitely remote one ) can the 4 1 . 0 - k g object be placed so as to experience a net force of zero
A 1 4 0 - kg object and a 4 4 0 - k g object are

Determine the amount of charge and stored energy of a capacitor consisting of 1 . 5 cm \ times 2 cm rectangular plates separated by a 0 . 0 2 mm air gap when connected to a 9 V battery. Use the permittivity of free space, = 8 . 8 5 \ times 1 0 ^ 2 ( F / m )

Task# 1 0 A block ( mass = 1 5 k g ) is being pulled on a rough horizontal surface by a person ysing a rope. The rope makes an angle = 2 0 with the horizontal. As the result of constant force T = 1 7 5 N applied by the person, the block moves with constant acceleration. The coefficient of friction & between the block and the surface is 0 . 4 2 .
Task# 1 0 A block ( mass = 1 5 k g ) is being

Part A The probe used in a medical ultrasound examination emits sound waves in air that have a wavelength of 0 . 1 2 mm . What is the wavelength of the sound waves in the patient? 0 . 5 4 mm 0 . 0 2 7 mm 0 . 2 6 mm 0 . 1 2 mm
Part A The probe used in a medical ultrasound

Magnet A has twice the magnetic field strength of magnet B and pulls on magnet B with force of 1 0 0 N . The amount of force that magnet A exerts on magnet B is not enough information more than 1 0 0 N . exactly 1 0 0 N . at or about 5 0 N .
Magnet A has twice the magnetic field strength of

State the dimensions of C given that C = m 2 x 4 v ( m is a mass, x is a length and v is velocity ) . [ M ] 2 [ L ] 2 [ T ] [ M ] 2 4 [ T ] [ M ] [ T ] 2 [ M ] 2 [ T ]
State the dimensions of C given that C = m 2 x 4

A ball on a massless, rigid rod oscillates as a simple pendulum with a period of 2 . 0 s . If the ball is replaced with another ball having twice the mass, the period will be A . 1 . 0 s B . 1 . 4 s C . 2 . 0 s D . 2 . 8 s E . 4 . 0 s Sinte - 1 8
A ball on a massless, rigid rod oscillates as a

Refer to the figure. Let the mass of the block be 1 . 4 0 kg and the angle be 3 6 . 0 . Find ( a ) the tension in the cord and ( b ) the normal force acting on the block. ( c ) If the cord is cut, find the magnitude of the block's acceleration. ( a ) Number Units ( b ) Number ( c ) Number Units Units
Refer to the figure. Let the mass of the block be

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