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Physics Questions and Answers September 11, 2019

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Assume that a 7 . 0 - cm - diameter, 1 1 0 W light bulb radiates all its energy as a single wavelength of visible light. Estimate the electric field amplitude at the surface of the bulb. Estimate the magnetic field amplitude at the surface of the bulb.

se the worked example above to help you solve this problem. Light of wavelength 5 . 8 4 1 0 2 nm is incident on a slit of width 0 . 3 1 3 mm . The observing screen is placed 2 . 1 2 m from the slit. Find the positions of the first dark fringes and the width of the central bright fringe. y 1 = mmw = mm EXERCISEHINTS: GETTING STARTED | I ' M STUCK!

What is the de Broglie wavelength of an electron with kinetic energy 1 . 6 0 1 0 - 1 5 J ? Multiple Choice 1 2 . 3 pm 6 1 2 nm 6 1 . 2 nm 1 3 . 7 pm 1 . 2 0 fm
What is the de Broglie wavelength of an electron

A minoceros is at the origin of coordinates at time t 1 = 0 For the time interval from t 1 to t 2 = 1 4 5 s , the rhino's average velocity has x - component 3 . 2 0 m s and y - component 5 . 9 0 m s .
A minoceros is at the origin of coordinates at

An f / 3 . 0 5 CCD camera has a 1 0 9 mm focal length lens and can focus on objects from infinity to as near as 3 1 . 5 cm from the lens. Note: " f / 3 . 0 5 " means " an f - number of 3 . 0 5 . " HINT ( a ) Determine the camera's aperture diameter in mm . mm Determine the minimum and maximum distances in cm from the CCD sensor over which the lens

Let s obtain the equation for the final temperature of the water / block system. The first law of thermodynamics states that the flow of heat is just the transfer of internal energy. If we assume that the water block system is isolated, what relationship between Qwater and Qblock? B 2 . Rewrite this equation in terms of the heat capacities and

a wire carries a current. if the wire radius is halved and the current is halved, the electron drift velocity changes by a factor of

7 . ( 1 5 points ) A glass rod of refractive index \ ( n = 1 . 6 \ ) and diameter \ ( d = 1 . 6 \ mathrm { ~cm } \ ) has a hemispherical cap. There is a fault in the glass \ ( \ ell = 2 . 3 \ mathrm { ~cm } \ ) from the end. Can you see this fault if you look at the rod through the spherical cap along the axis of symmetry? From about how far away
7 . ( 1 5 points ) A glass rod of refractive

1 . A long, straight solenoid has 7 7 0 turns. When the current in the solenoid is 2 . 9 0 A , the average flux through each turn of the solenoid is \ ( 3 . 2 5 \ times 1 0 ^ { - 3 } \ mathrm { ~Wb } \ ) . a . What must be the magnitude of the rate of change of the current in order for the self - induced emf to equal 7 . 2 5 mV ? b . What is the
1 . A long, straight solenoid has 7 7 0 turns.

A bicycle wheel is rotated a quarter of a revolution. What angle ( a ) in radians and ( b ) in degrees is it rotated by ?

The average flow rate of blood in the aorta is 8 0 cm 3 / scm 3 / s . Beyond the aorta, this blood eventually travels through about 6 1 0 9 6 1 0 9 capillaries, each of radius 8 . 0 1 0 4 8 . 0 1 0 4 cmcm . What is the average speed of the blood in the capillaries? Express your answer with the appropriate units.

A police officers radar gun emis radio waves at a frequeney of 1 0 3 Gitz. Assume that the cars are both headed directly av from the stationary officer. d Use c = 3 . 0 0 0 x 1 0 8 m / s for the speed of light and 1 mph = 0 . 4 4 7 0 4 m / s . Macmi What is the magnitude Af of the difference in the frequencies reflected back to the radar gun by a

You have a 1 9 5 resistor, a 0 . 4 0 4 H inductor, a 4 . 9 8 F capacitor, and a variable - frequency ac source with an amplitude of 3 . 0 2 V . You connect all four elements together to form a series circuit. Part A At what frequency will the current in the circuit be greatest? Express your answer in radians per second. Part B What will be the

An LL - CC circuit consists of a 6 0 . 0 mHmH inductor and a 2 9 0 FF capacitor. The initial charge on the capacitor is 6 . 0 0 CC and the initial current in the inductor is 0 . 6 0 0 mAmA. ( a ) What is the maximum energy stored in the inductor? ( b ) What is the maximum current in the inductor? ( c ) What is the maximum voltage across the

You discover a new type of microscopic, atom - like object. The energy levels for this object are given by En = E 1 n , where E 1 = 2 8 . 0 eV . For this new object, determine the following. ( a ) excitation energy ( in eV ) of the object in the third excited state 2 1 . 0 eV ( b ) amount of energy ( in eV ) required to cause an object in the

The temperature of a 2 . 1 4 kg block of copper is increased reversibly from 2 5 . 0 C to 1 0 0 C . Assume that the specific heat of copper is 3 8 6 J / kg K . ( a ) Find the energy absorbed as heat. J ( b ) Find the change in entropy. J / K

If emission spectra from a distant galaxy are shifted toward the red, then they must have

A 5 . 0 mLmL syringe has an inner diameter of 5 . 0 mmmm , a needle inner diameter of 0 . 2 2 mmmm , and a plunger pad diameter ( where you place your finger ) of 1 . 2 cmcm . A nurse uses the syringe to inject medicine into a patient whose blood pressure is 1 4 0 / 1 0 0 . Assume the liquid is an ideal fluid. Part A What is the minimum force the

( 2 ) Which one of the following is TRUE about Bulk Modulus of elasticity? ( A ) it is the ratio of compressive stress to volumetric strain ( B ) it is the ratio of compressive stress to linear strain ( C ) it is the ratio of tensile stress to volumetric strain ( D ) it is the ratio of tensile stress to linear strain
( 2 ) Which one of the following is TRUE about

A film of MgF 2 ( n = 1 . 3 8 ) is used to coat on the ( front ) surface of a sun glasses ( n glass = 1 . 6 )

Please solve both prompts. In this question you will explore how bats use the Doppler effect with echolocation to get more information about their prey. Echolocation is the process of using the reflection of sound waves to detect information about the surrounding environment. Animals that use echolocation emit a sound that travels until it hits a
Please solve both prompts. In this question you

Michael lear on a shopping cart, causing it to start moving. Which statement is true about the orces Michael and the cart exert on each other? Michael and the cart exert equal and opposite forces on each other. Michael exerts a larger magnitude force on the cart than the cart exerts on Michael. The magnitude of forces cannot be determined without
Michael lear on a shopping cart, causing it to

You have been hired to design a family - friendly see - saw. Your design will feature a uniform board of mass M = 1 6 . 6 1 k g and length L = 1 3 . 7 7 m that can be moved so that the pivot is a distance d from the center of the board. This will allow riders to achieve static equilibrium even if they are of different mass, as most people are. You
You have been hired to design a family - friendly

In a double - slit interference experiment, the wavelength is = 5 0 2 n m , the slit separation is d = 0 . 1 9 0 m m , and the screen is D = 4 7 . 0 c m away from the slits. What is the linear distance x between the sixth order maximum and the third order maximum on the screen?
In a double - slit interference experiment, the

Question 1 2 1 pts A 0 . 7 0 - m radius cylindrical region contains a uniform electric field that is parallel to the axis and is increasing at the rate 5 . 0 1 0 1 2 V m * s . The magnetic field at a point 1 . 2 m from the axis has a magnitude of: 2 . 3 1 0 - 5 T 7 . 0 1 0 - 6 T 2 . 8 1 0 - 5 T 0 T 1 . 1 1 0 - 5 T
Question 1 2 1 pts A 0 . 7 0 - m radius

An adiabatic process is one in which no heat enters or leaves a gas. If a gas undergoes an adiabatic transition and its internal thermal energy increases, what must happen to the volume of the gas?
An adiabatic process is one in which no heat

A gas at a pressure of 3 2 5 torr exerts a force of N on an area of 5 . 5 m 2 . 2 . 4 0 . 0 1 8 1 . 8 * 1 0 3 5 9 2 . 4 * 1 0 5
A gas at a pressure of 3 2 5 torr exerts a force

A system has two blocks, ml and m 2 , on an inclined plane, attached by a rope on a pulley. Draw a FBD of the forces acting on blocks, m 1 and m 2 .
A system has two blocks, ml and m 2 , on an

= h p = h m v , y m = m L d , m = 0 , 1 , 2 , 3 , dots De Broglic wavelength for a moving particle Positions of bright fringes for double - slit interference at screen distance L . A beam of electrons, and then a beam of protons, are shot through a double slit with a very small slit spacing such they make similar interference patterns. Which is
= h p = h m v , y m = m L d , m = 0 , 1 , 2 , 3 ,

During an adiabatic expansion the temperature of 0 . 4 5 0 molmol of argon ( ArAr ) drops from 6 4 . 0 C C to 1 0 . 0 C C . The argon may be treated as an ideal gas. How much work does the gas do ? What is the change in internal energy of the gas?

In an oscillating LC circuit, the maximum charge on the capacitor is 6 . 0 1 0 6 C and the maximum current through the inductor is 9 . 0 mA . ( a ) What is the period of the oscillations ( in s ) ? s ( b ) How much time ( in s ) elapses between an instant when the capacitor is uncharged and the next instant when it is fully charged? s

An experiment involves placing an object 2 4 . 0 cm in front of a diverging lens with a radius of curvature 1 9 . 5 cm . Calculate the image distance formed by the lens. Please express your answer in centimeters.
An experiment involves placing an object 2 4 . 0

Learning Goal:which one of the following statements is the best explanation for the fact that metal pipes that carry water often burst during cold winter months? Group of answer choices Both the metal and the water expand, but the water expands to a greater extent. The metal contracts to a greater extent than the water. The interior of the pipe

An RC series circuit has resistance of 5 0 and capacitance of 1 6 0 F . What is its time constant, ( tau ) of the circuit if the capacitor takes 4 0 ms to become fully charged. An RC series circuit has resistance of 5 0 and capacitance of 1 6 0 F . What is its time constant, ( tau ) of the circuit if the capacitor takes 4 0 ms to become fully

An ultracentrifuge accelerates from rest at a constant rate to 9 . 3 8 x 1 0 ^ 5 rpm in 1 . 9 9 min. What is its angular acceleration in radians per second squared? What is the tangential acceleration of a point 9 . 7 cm from the axis of rotation? What is the radial acceleration of the same point in meters per second squared when the centrifuge

a long copper wire of resistivity 1 . 7 e ^ - 8 is coiled into a solenoid with a total length of 5 0 m and a radius of 5 cm . the solenoid is connected to a 1 2 v battery. the wire has a circular cross sectional area of 0 . 5 mm 2 ignoring the effect of self induction what is the total power dissipated in the solenoid

The field of an electromagnet is given by B = 0 . 0 2 + 0 . 0 1 1 5 z 2 , with B in tesla and z = distance in cm from the north pole of the magnet. A magnetic dipole whose moment hasmagnitude 1 . 3 4 x 1 0 - 2 3 amp - m 2 is located 8 . 0 0 cm from the north pole, the dipolemoment vector at 4 0 \ deg to the local magnetic field direction. What are

The speed of a certain proton is 3 5 0 km / s . if the certainty in its momentum is 0 . 0 0 1 0 0 per cent, what uncertainty in its location must be tolerated?

Suppose that light rays approach a negative lens so that they are converging towards the focal point on the far side of the lens. How will these rays emerge when they leave the lens? Multiple Choice They will converge to the focal point. They will converge to another point. They will diverge. They will all be parallel to each other.

Torque is the rotational analogue of: ( A ) kinetic energy ( D ) force ( B ) linear momentum ( E ) mass ( C ) acc
Torque is the rotational analogue of: ( A )

A straight, 2 . 5 0 mm wire carries a typical household current of 1 . 5 0 AA ( in one direction ) at a location where the earth's magnetic field is 0 . 5 5 0 gauss from south to north. Find the magnitude of the force if the current in this wire is running vertically upward. Express your answer with the appropriate units

what is 2 . 5 0 * 1 0 ^ - 4 m in mm

What is the focal length of a magnifying glass that produces a magnification of 3 . 0 0 3 . 0 0 when held 5 . 8 0 5 . 8 0 cm from an object, such as a rare coin? What is the focal length of the magnifying glass? Calculate the power of the magnifier in diopters.

0 1 8 ( part 1 of 2 ) 1 0 . 0 points A point source emits sound waves with an average power output of 4 . 7 3 W . Find the intensity 6 . 9 2 m from the source. Answer in units of W / m 2 . 0 1 9 ( part 2 of 2 ) 1 0 . 0 points Find the distance at which the sound reduces to a level of 6 4 dB . Answer in units of m .

Two point charges are located on the y - axis as follows: one charge q 1 q 1 = - 1 . 7 0 nCnC located at y = y = - 0 . 6 0 0 mm , and a second charge q 2 q 2 = 3 . 9 5 nCnC at the origin ( y = 0 ) ( y = 0 ) .

why does the red light have the theta + 2 7 term while the violet only has theta

speed. to Port and 6 9 0 . 0 m Ahead of Alpha. direction, give a negative angle. Part A What is the force on Gamma by Alpha? Give the magnitude of the force in \ ( \ mu \ mathrm { N } \ left ( \ mu \ mathrm { N } \ right . \ ) is read "microNewtons" and designates \ ( 1 0 ^ { - 6 } \ mathrm { ~N } \ ) ) . between 0 and 1 8 0 degrees. If the angle
speed. to Port and 6 9 0 . 0 m Ahead of Alpha.

Astronaut Hans leaves Earth in a spaceship traveling at a speed of 0 . 2 8 0 c relative to the observer Brian at rest on Earth. Hans is holding a pencil at an angle of 3 0 with the direction of travel, as seen by Hans. What angle does the pencil make with the direction of travel, as seen by Brian on Earth? 3 0 3 1 2 9 3 3 9 0
Astronaut Hans leaves Earth in a spaceship

A real heat engine operating between heat reserves at temperatures of 5 1 0 K and 2 7 0 K performs 2 . 4 KG of network and rejects nine point KJ of heat in a single cycle. The thermal efficiency of the heat engine is closest to .

Question 6 ( 1 point ) Which of the following statements are true? Select all correct statements. Select 1 correct answer ( s ) If the length of the wire increases by a factor of 4 and the tension and mass remain the same, the phase speed of the transverse wave increases by a factor of 2 . If the tension is increased and the mass of the wire is
Question 6 ( 1 point ) Which of the following

Suppose an air - gap capacitor has circular plates of radius R = 3 . 0 cm and separation d = 1 . 4 m m . A 7 5 . 0 Hz emf, E = E 0 c o s ( t ) , is applied to the capacitor. The maximum displacement current is 3 1 A .
Suppose an air - gap capacitor has circular

you have two plates of copper, a sheet of mica ( thickness = 1 . 2 mm , k = 7 . 0 ) , and a slab of paraffin ( thickness = 1 . 3 cm , k = 2 . 0 ) . To make a parallel plate capacitor with the largest C , which sheet should you place between the copper plates: mica, glass or paraffin?

What is recoil speed of car cannon

Three capacitors C 1 = 1 0 . 4 F , C 2 = 2 0 . 0 F , and C 3 = 2 9 . 0 F are connected in series. To avoid breakdown of the capacitors, the maximum potential difference to which any of them can be individually charged is 1 2 5 V . Determine the maximum energy stored in the series combination.

A certain transverse wave is described by y ( x , t ) = Bcos [ 2 ( xL t ) ] y ( x , t ) = Bcos [ 2 ( xL t ) ] , where BB = 5 . 5 0 mmmm , LL = 3 0 . 0 cmcm , and = 3 . 9 0 1 0 2 ss .

A thin stick is placed along the x axis so that one of its ends is at x 1 = 0 . 0 0 m and the other one at x 2 = 2 . 0 5 m . The stick has a non - uniform mass density ( x ) = a x + b , where a = 0 . 9 9 9 k g m 2 and b = 1 . 1 2 2 k g m . What is the x coordinate x c m of the stick's center of mass? x c m =
A thin stick is placed along the x axis so that

2 . ) If you are told that you have a 1 . 0 kg mass of solid water ( ice ) with an initial temperature of exactly 0 C , how much heat is transferred to melt the ice and convert it into 1 . 0 kg of liquid water at 0 C ? Is the heat energy absorbed or released by the water in this process? Q = m L where: Q: heat energy exchange of the body m: mass

In an amusement park ride, passengers stand inside an 8 . 0 m radius cylinder, Initially the cylinder rotates with its axis oriented along the vertical. After the cylinder has acquired sufficient speed, it tilts into a vertical plane, that is , the axis tilts into the horizontal, as shown in the figure. Suppose that, once the axis has tilted into
In an amusement park ride, passengers stand

What is the focal length ( in m ) of a makeup mirror that has a power of 1 . 4 0 D ?

An object in SHM oscillates with a period of 4 . 0 ss and an amplitude of 1 5 cmcm .

Q 8 . The volume of earth is 1 . 0 8 1 0 1 2 k m 3 while the volume of Jupiter is 1 . 4 3 1 0 1 5 k m 3 . Find out the difference between their radius assuming both are spheres.
Q 8 . The volume of earth is 1 . 0 8 1 0 1 2 k m

In a Young's double - slit experiment the wavelength of light used is 4 8 7 nm ( in vacuum ) , and the separation between the slits is 1 . 4 1 0 - 6 m . Determine the angle that locates ( a ) the dark fringe for which m = 0 , ( b ) the bright fringe for which m = 1 , ( c ) the dark fringe for which m = 1 , and ( d ) the bright fringe for which m =
In a Young's double - slit experiment the

An electric turntable 0 . 7 4 0 m in diameter is rotating about a fixed axis with an initial angular velocity of 0 . 2 2 0 rev / s . The angular acceleration is 0 . 9 1 0 rev / s 2 . Compute the angular velocity after a time of 0 . 2 0 7 s . Through how many revolutions has the blade turned in this time interval? What is the tangential speed of a

Electromagnetic waves are traveling in the vacuum of space. Calculate the wavelengths of these electromagnetic waves with the following frequencies. ( Enter the first wavelength in pm and the second wavelength in cm . ) ( a ) 9 . 0 0 1 0 1 9 Hz pm ( a ) 2 . 5 0 1 0 9 Hz cm

A uniform solid disk with mass 5 . 7 5 kg and a radius of 0 . 1 7 6 m rotates about a fixed axis perpindicular to its face. If the angular speed is 5 . 3 7 rad / s , calculate the angular momentum of the disk when the axis of rotation passes through its centre of mass. 4 . 7 8 1 0 - 1 kg * m ^ 2 / s You are correct. Your receipt no . is 1 6 0 - 4

Question 5 ( 1 point ) A very long straight current - carrying wire produces a magnetic field of 2 0 mT at a distance d from the wire. To measure a field of 5 mT due to this wire, you would have to go to a distance of 1 6 d d 4 sqrt ( 2 ) 8 d 2 d 4 d
Question 5 ( 1 point ) A very long straight

A student wants to use conservation of momentum to determine the mass, m , of an unknown Object 1 that can be placed on an air track. Describe such an experiment. Assume that you have a device to measure velocity, an air track or frictionless surface to eliminate friction, and another Object 2 with known mass, M .

A 0 . 8 0 0 kg ornament is hanging by a 1 . 5 0 m wire when the ornament is suddenly hit by a 0 . 2 0 0 kg missile traveling horizontally at 1 2 . 0 m s . The missile embeds itself in the ornament during the collision.
A 0 . 8 0 0 kg ornament is hanging by a 1 . 5 0 m

You have just completed the overhaul on your dune buggy. To test the engine, you rev it up to 2 . 8 5 1 0 3 rpm ( revolutions per minute ) . ( a ) Determine the frequency and period of the engine. frequency Hzperiod s ( b ) If you change the period to 0 . 0 4 5 0 s , determine the number of rpm for the engine. rpm

You throw a 5 . 5 gg coin straight down at 4 . 0 m / sm / s from a 7 5 - mm - high bridge. How much work does gravity do as the coin falls to the water below? What is the coin's change in kinetic energy?

A 2 0 0 g load attached to a horizontal spring moves in simple harmonic motion with a period of 0 . 4 3 0 s . The total mechanical energy of the spring load system is 4 . 0 0 J . ( a ) What is the spring constant ( in N / m ) ? N / m ( b ) What is the amplitude ( in m ) of the motion? m ( c ) What If ? What is the percentage change in amplitude of

during your visit to the eye doctor, your pupils are dilated so the ophthalmologist can better see the interior.

A satellite orbits a planet of unknown mass in a circle of ra - dius 2 . 0 1 0 7 m . The magnitude of the gravitational force on the satellite from the planet is F 8 0 N . ( a ) What is the kinetic energy of the satellite in this orbit? ( b ) What would F be if the orbit radius were increased to 3 . 0 1 0 7 m ?

a simple pendulum is made of a small blob of mass m = 4 kg attached to the end of an inextensible wire. the angular amplitude of oscillation is 1 0 . 0 3

If a system has 7 0 . 0 J of heat added to it , and the system does 2 5 . 0 J of work on its surroundings, what is the change in the internal energy of the system, in J

1 0 . A thin layer of oil with index of refraction 1 . 5 0 is on top of a pool of water ( index of refraction 1 . 3 3 ) . The light reflected from the surface has a maximum intensity in the green part of the spectrum at a wavelength ( in air ) of Air \ ( n = 1 \ ) 5 4 0 nm . Which of the following is the thinnest possible thickness of the layer of
1 0 . A thin layer of oil with index of

Light is travelling through a medium whose index of refraction is unknown. It hits a medium whose index of refraction is 1 . 0 3 . The critical angle is 7 0 for this boundary. What is the index of refraction for the medium through which the light travels?

Which of the following are characteristics of a mass in simple harmonic motion?I. The motion repeats at regular intervals.II . The motion is sinusoidal.III. The restoring force is proportional to the displacement from equilibrium

Suspuse a 3 4 0 that has a 5 0 - Hz horn is moving at 3 5 , 0 m / s in stillair on a day when the sped ( a ) What frequencies are observed by a stationary person at the side of the tracks as the train approaches and after it passes? ( b ) What frequency is observed by the train's engineer traveling on the train?

r 0 8 pts 5 4 Details A generator is constructed by rotating a coil of N turns in a magnetic field B at a frequency f . The internal resistance of the coil is R and the cross sectional area of the coil is A . Which of the following statements are True / False ? The maximum induced EMF occurs when the rotated coil is perpendicular to the magnetic
r 0 8 pts 5 4 Details A generator is constructed

A pebble is dropped in a lake; and it produces ripples with a frequency of 0 . 2 5 Hz . When should a second pebble be dropped at the same place to produce destructive interference?
A pebble is dropped in a lake; and it produces

Part I Now recall the expression for the time derivative of the x component of the system's total momentum: d p x t d t = F x . Considering the information that you now have, choose the best alternative for an equivalent expression to d p x t d t . View Available Hint ( s ) 0 nonzero constant k t k t 2
Part I Now recall the expression for the time

2 N / CWhat is the magnitude of the electric field at a point within the sphere. cm 1 0 from the center in . The answer you gave is not a number \ ( 7 \ mathrm { ~N } / \ mathrm { C } \ ) What is the magnitude of the electric field at a point outside of the sphere. cm 2 0 from the center in
2 N / CWhat is the magnitude of the electric

Problem 4 Two vectors in C 3 are given by Find | a : | | ( a )
Problem 4 Two vectors in C 3 are given by Find |

In the figure, part of a long insulated wire carrying current i = 8 . 8 3 m A is bent into a circular section of radius R = 9 . 3 9 c m . What are ( a ) the x - component, ( b ) the y - component, and ( c ) the z - component of the magnetic field at the center of curvature C if the circular section lies in the plane of the page as shown? What are
In the figure, part of a long insulated wire

1 . A mover is trying to slide a uniformly filled crate of length L , height H and mass M across a floor. There is static friction with coefficient s between the floor and the crate. The mover exerts a horizontal force F at the upper edge of the crate. If s is large enough, the crate will tip over before it slides. ( a ) Find an expression for the

A uniform bar of length L = 1 . 1 1 m and mass m = 1 . 9 kg is pivoted at the right end and lifted \ theta = 1 0 . 0 o above the horizontal. A horizontal force of magnitude F = 1 0 . 2 N What is the magnitude of the net torque acting on the bar about the pivot point?

An observer traveling with speed 0 . 5 c moves directly toward a beacon emitting photons with speed c in her direction. The observer measures the speed of the approaching photons as An observer traveling with speed 0 . 5 c moves directly toward a beacon emitting photons with speed c in her direction. The observer measures the speed of the

A rectangular trough, 2 . 0 m long, 0 . 7 0 m wide, and 0 . 5 0 m deep, is completely full of water. One end of the trough has a small drain plug right at the bottom edge. What is the speed at which the water emerges from the hole when the plug is pulled?

A 1 5 0 0 0 - N car on a hydraulic lift rests on a cylinder with a piston of radius 0 . 2 0 m . If a connecting cylinder with a piston of 0 . 0 4 0 - m radius is driven by compressed air, what force must be applied to this smaller piston in order to lift the car?

In 1 9 5 7 , the ( then ) Soviet Union launched Sputnik, Earth s first orbiting artificial satellite. Sputnik orbited at an altitude of 1 3 4 ( perigee ) to 5 8 3 ( apogee ) miles. It transmitted with approximately one watt RF power at frequencies of 2 0 . 0 0 5 and 4 0 . 0 0 2 MHz . Sputnik had two pairs of antennas with elements in each pair

The electric field of an electromagnetic wave in a vacuum is Ey = ( 1 5 . 0 V / m ) cos ( ( 2 . 7 8 1 0 ^ 8 ) x - wt ) , where x is in m and t is in s .

A bat flies along the x axis. What is the sign of the acceleration if it is moving in the positive direction and slowing down?

A resistor with R 1 R 1 = 2 2 . 0 is connected to a battery that has negligible internal resistance and electrical energy is dissipated by at a rate of 5 0 . 0 WW .

A lone neutron spontaneously decays into a proton plus an

a uniform magnetic field of 8 . 7 5 t points in some direction. consider the magnetic flux through a large triangular wire loop that has three equal sides of 1 . 4 5 m

What sound intensity level in dB is produced by a chain saw that creates an intensity of 4 . 0 0 watts per meter squared?

In the pVpV diagram shown in the figure ( Figure 1 ) , 8 3 . 0 JJ of work was done by 0 . 0 7 0 0 mole of ideal gas during an adiabatic process. How much heat entered or left this gas from a to b ? Express your answer in joules. By how many joules did the internal energy of the gas change? Express your answer in joules. What is the temperature of
In the pVpV diagram shown in the figure ( Figure

A bicycle wheel has an initial angular velocity of 1 . 1 0 rad / srad / s .

Light of wavelength 1 . 0 4 nm creates a first order interference maximum when it is incident on a crystal at a grazing angle of 2 5 . 7 from the surface. Determine the interatomic spacing of the Bragg planes of the crystal. Answer in nanometers.

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