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Physics Questions and Answers October 24, 2019

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A sinusoidal wave is sent along a string with a linear density of \ ( 2 . 2 5 \ mathrm { ~g } / \ mathrm { m } \ ) . As it travels, the kinetic energies of the mass elements along the string vary. Figure ( a ) gives the rate \ ( d K / d t \ ) at which kinetic energy passes through the string elements at a particular instant, plotted as a function
A sinusoidal wave is sent along a string with a

Grains from a grain hopper fall at a rate of \ ( 1 0 . 7 \ mathrm { ~kg } / \ mathrm { s } \ ) vertically onto a freight car that is moving horizontally at a constant speed \ ( 3 . 3 \ mathrm { ~m } / \ mathrm { s } \ ) on a straight track. What force, in newtons, is needed to keep the freight car moving at a constant velocity?
Grains from a grain hopper fall at a rate of \ (

After a 0 . 3 0 0 - kg rubber ball is dropped from a height of 1 . 7 5 m , it bounces off a concrete floor and rebounds to a height of 1 . 5 0 m

If the net electric flux out of a closed surface is zero, does that mean the charge density must be zero everywhere inside the surface? Explain your answer.
If the net electric flux out of a closed surface

Car A travels with speed v around curve number one, which has a radius r . Car B travels with speed 2 v around curve number two, which has a radius 2 r . The acceleration will be zero for both cars. the same for both cars. greater for car A . greater for car B .
Car A travels with speed v around curve number

Suppose that the amount of heat removed when 1 . 0 kg of water freezes at 0 . 0 C were removed from ethyl alcohol at its freezing / melting point of - 1 1 4 . 4 C . How many kilograms of ethyl alcohol would freeze? Number Units
Suppose that the amount of heat removed when 1 .

) A 4 . 8 kg block attached to a spring executes simple harmonic motion on a frictionless horizontal surface. At time t = 0 s , the block has a displacement of - 0 . 9 0 m , a velocity of - 0 . 8 0 m / s , and an acceleration of + 2 . 9 m / s 2 . The force constant of the spring is closest to: A ) 1 3 N / m B ) 1 4 N / m C ) 1 5 N / m D ) 1 1 N /

explain impulse formula in physics

explain continuous mass distribution of centre of mass formula

The main thing that differs between speakers with different accents is: Group of answer choices How long they pause before producing plosives How high the noise frequency is when producing fricatives How and where they are producing vowels in the vocal tract All of the above

A beam with particles, particles, and rays at a given energy is directed toward a 1 - centimeter thick block of lithium. Which is most likely to interact with a lithium atom?

A copper wire of cross - sectional area 2 . 4 0 \ times 1 0 - 6 m * and length 4 . 0 0 m has a current of 2 . 8 0 A uniformly distributed across that area. ( a ) What is the magnitude of the electric field along the wire? ( b ) How much electrical energy is transferred to thermal energy in 4 0 . 0 min?

a pendulum has a period of 2 . 2 5 s on earth. what is its period on mars

A series LC circuit consists of a 2 . 5 mH inductor and a 4 . 5 F capacitor.

the uncertainty in position of an electron is 4 . 3 5 x 1 0 ^ - 1 0 m . Find the minimum uncertainty in the electrons velocity?

A spar buoy consists of a circular cylinder, which floats with its axis oriented vertically. One such buoy has a radius of 1 . 0 0 m , a height of 2 . 0 0 m and weighs 4 0 . 0 kN .
A spar buoy consists of a circular cylinder,

5 : O A l P O A R Q O A
5 : O A l P O A R Q O A

A DVD ( radius 6 . 0 cm ) is spinning freely with an angular velocity of 1 1 5 0 rpm when a bug drops onto and sticks to the DVD a distance 4 . 7 cm from the center. If the DVD slows to 8 7 5 rpm , what is the ratio of the bug's mass to the DVD ' s mass? ( Ignore the effect of the hole in the center of the DVD . )

A uniform cylindrical turntable of radius 1 . 6 0 m and mass 2 9 . 4 kg rotates counterclockwise in a horizontal plane with an initial angular speed of 4 rad / s . The fixed turntable bearing is frictionless. A lump of clay of mass 2 . 3 0 kg and negligible size is dropped onto the turntable from a small distance above it and immediately sticks to

How much work must be done to increase the speed of an electron from rest to ( a ) 0 . 5 8 6 c , ( b ) 0 . 9 3 0 c , and ( c ) 0 . 9 9 5 8 c ?

While warming up for a game, a center fielder throws a baseball with a velocity v at different angles above the horizontal. The left fielder always catches the baseball at the same height it was released. Express your answers to the following in terms of the given variables and fundamental constants. Determine the initial vertical velocity of the

The brass bar and the aluminum bar in the drawing are attached to an immovable wall. At 2 4 . 1 C the air gap between the rods is 1 . 7 1 * 1 0 ^ - 3 m . At what temperature will the gap be closed

By what factor will the rms speed of gas molecules increase if the temperature is increased from 0 C C to 2 7 3 C C ?

What is impact lag

some would say that we "generated" electrical power but in terms of physics terminology we would take in terms of "energy conservation" and "efficiency". Explain the meaning of these two terms and how they apply in this situation

what would human on Earth need to do to withstand this temperature

1 . A ball is thrown upward from the top of a 3 0 meter high building with an initial speed of 2 5 m / s . a . How much time does it take to reach the ground? b . What velocity does it have when it reaches the ground

6 of 9 - Energy of Interfering Cherie and Desmond consider the case where the magnitudes of the amplitudes are equal but one is inverted. At the moment the two pulses overlap, what can Desmond say lappens to the energy of the pulses? "The energy associated with the pulses has disappeared." "The energy of the pulses increases by a factor of 4 ,
6 of 9 - Energy of Interfering Cherie and Desmond

Two parallel wires carry currents in the opposite direction. There are no magnetic fields present, other than that caused by the wires. If Wire 1 has a current of I , while Wire 2 has a current of 2 I, which current feels the stronger force? Question 1 7 options: The forces are the same. Only one of the wires feels a force. Wire 2 . Wire 1 .

For ice melting into water at 0 C , the latent heat of fusion is Lf = 3 . 3 5 x 1 0 ^ 5 J / kg . For boiling water at 1 0 0 C , the latent heat of vaporization is Lv = 2 . 2 6 x 1 0 ^ 6 J / kg . which process involves a greater change in entropy?

Blood flows through the aorta at a speed of 3 7 cm / s . The aorta, which has radius 1 . 2 cm , branches eventually into a large number of tiny capillaries that distribute the blood to the various body organs. In a capillary, the blood speed is 0 . 0 7 6 cm / s and the radius is 6 . 2 x 1 0 - 4 cm . Treating the blood as an incompressible fluid,

Consider a tank of water of total depth D , sitting on the Earth s surface. Take the surface of the water to be z = 0 , and the bottom of the tank to be at z = D ( so z increases in the downward direction ) . Assume the density of water is constant at water ( we call the water incompressible ) . For low pressures, the assumption of

A group of hikers hear an echo 3 . 8 s after they shout. The temperature is 2 0 C . How far away is the mountain that reflected the sound wave? At this altitude, the speed of sound in air at 2 7 3 K is 3 3 2 m / s . Answer in units of m .

Light of wavelength 6 0 0 mm passes through a double slit with a separation d = 0 . 3 mm . The screen is at L = 2 . 0 m . What is the angular width of the interference maximum? What is the width in cm of the interference maximum? If the slit separation is increased, how does the distance between maxima change? If the slits are not infinitely

g ( m / s 2 ) = 9 . 8 mass ( kg ) = 2 s = 0 . 5 k = 0 . 5 Angle = 3 0 Keeping the settings from the previous question, but changing the coefficient of kinetic friction to 0 . 4 , how much farther up the ramp does the mass travel before turning around? ( please provide your answer in m to 2 decimal places ) Keep the settings from the previous

Mass m = 0 . 1 kg moves to the right with speed v = 0 . 6 9 m / s and collides with an equal mass initially at rest. After this inelastic collision the system retains a fraction = 0 . 7 8 of its original kinetic energy. If the masses remain in contact for 0 . 0 1 secs while colliding, what is the magnitude of the average force in N between the

A sample of gas, initially with a volume of 1 . 0 L , undergoes a thermodynamic cycle. Find the work done by the gas on its environment during each stage of the cycle described below. ( Enter your answers in J . ) ( a ) First, the gas expands from a volume of 1 . 0 L to 6 . 0 L at a constant pressure of 8 . 0 atm. J ( b ) Second, the gas is cooled

A child applies an 1 9 . 0 N force tangentially to the edge of the merry - go - round for 2 5 . 0 s . If the merry - go - round is initially at rest, what is its angular speed after this 2 5 . 0 s interval? Express your answer in radians per second. Activate to select the appropriates template from the following choices. Operate up and down arrow

Suppose a 5 9 . 5 kg gymnast climbs a rope. ( a ) What is the tension ( in N ) in the rope if he climbs at a constant speed? N ( b ) What is the tension ( in N ) in the rope if he accelerates upward at a rate of 1 . 7 0 m / s 2 ? N

Consider two microwave ovens which emit electromagnetic waves at frequencies of 9 6 0 and 2 5 9 0 MHz , respectively. Part ( a ) What is the ratio of power outputs of the lower - frequency oven to the higher - frequency one, if they emit the same numbers of photons? P 1 / P 2 = | sin ( ) cos ( ) tan ( ) cotan ( ) asin ( ) acos ( ) atan ( ) acotan

A 5 0 kg mass is at vec ( r ) 1 = 7 mhat ( ) . An object with mass 3 0 kg and charge 8 1 0 - 9 C is at vec ( r ) 2 = 4 mhat ( ) + 4 mhat ( ) . A 5 1 0 - 1 0 C charge is at vec ( r ) 3 = 4 mhat ( ) . What is the force on the 3 0 kg object due to the 5 0 kg mass ? ( a ) vec ( F ) = 3 . 2 1 0 - 9 Nhat ( ) + 2 . 4 1 0 - 9 Nhat ( ) ( b ) vec ( F ) = 3

An object is at rest. Two forces, x and Y , are acting on it . Force x has a magnitude of x and acts in the downward direction. What is the magnitude and direction of Y , given that the object remains at rest? The magnitude is 2 x and points in the upward direction. The magnitude is x and points in the upward direction. The magnitude is x and
An object is at rest. Two forces, x and Y , are

A mass m = 1 . 6 kgm = 1 . 6 kg is at the end of a horizontal spring on a frictionless horizontal surface. The mass is oscillating with an amplitude A = 9 . 5 cmA = 9 . 5 cm and a frequency f = 1 . 9 5 Hzf = 1 . 9 5 Hz . eric.deslauriers@uconn.edu 8 C 8 4 - 4 2 - 2 2 - 4 4 - 9 9 ED - 2 5 9 5 4 Part ( a ) Write an equation for the spring constant

Problem 1 3 . 1 6 9 The river flows north at 3 m / s . ( Assume that the current is uniform. ) If you want to travel in a straight line from point C to point Din a boat that moves at a constant speed of 1 0 m / s relative to the water, in what direction should you point the boat? How long does it take to make the crossing? underline v theta * fw =

= 1 0 yi + 2 yjmzk . The constant " m " is most nearly:

7 - 5 1 ) .
7 - 5 1 ) .

each spectral line in an atomic spectrum represents

A 0 . 2 3 0 kgkg frame, when suspended from a coil spring, stretches the spring 0 . 0 4 0 0 mm . A 0 . 2 0 0 kgkg lump of putty is dropped from rest onto the frame from a height of 3 0 . 0 cmcm ( Figure 1 ) .
A 0 . 2 3 0 kgkg frame, when suspended from a

A 0 . 1 5 m 3 - plastic cube is tied to the bottom of a lake with a rope. The cube is completely submerged in the water. The density of the plastic is 8 5 0 . 0 k g m 3 and the density of the water is 1 0 0 0 . 0 k g m 3 . a . Draw a free - body diagram for the submerged plastic cube. b . Find the tension in the rope.
A 0 . 1 5 m 3 - plastic cube is tied to the

In an elastic collision, bumper cars 1 and 2 are moving in the same direction when bumper car 1 rear - ends bumper car 2 . The initial speed of bumper car 1 is 7 . 2 6 m / s and that of bumper car 2 is 4 . 6 2 m / s . The bumper cars have the same mass. Take the positive direction to be the direction in which the bumper cars are moving. What is

Part ( a ) Unanswered 5 attempts left In a particular photoelectric effect experiment, photons with an energy of 4 . 5 0 eV are incident on a metal surface, producing photoelectrons with a maximum kinetic energy of 2 . 6 0 eV . Calculate the work function of the metal. q , eV Numeric answer Part ( c ) Unanswered 5 attempts left Calculate the
Part ( a ) Unanswered 5 attempts left In a

A volleyball player is jumping up to spike ( hit ) a ball. Describe the work produced by the muscle at the knee joint during the take - off. Make sure to include the primary muscle responsible for producing the work, the type of muscle contraction occurred, and the effect of work on the total mechanical energy of the player's body. Make sure to
A volleyball player is jumping up to spike ( hit

A baseball picker throws a ball vertically straight upward and catches the ball 4 . 4 0 s later. ( a ) with what velocity did the ball leave the pitcher's hand? ( b ) what was the maximum height reached by the ball?

If a 6 0 0 0 Hz sound is presented at 9 0 degrees to the left of the listener ( directly to the left side ) , then the right ear Group of answer choices hears the sound at the same time as the left. hears the sound before the left. hears the sound at the same intensity as the left. hears the sound at a lower intensity than the left.

A parallel - plate vacuum capacitor has 8 . 0 4 JJ of energy stored in it . The separation between the plates is 4 . 0 0 mmmm . a . If the separation is decreased to 1 . 0 0 mmmm , what is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed? Express your answer in

A 3 . 3 5 g bullet moves with a speed of 1 2 5 m s perpendicular to the Earth's magnetic field of 5 . 0 0 1 0 - 5 T . Part A If the bullet possesses a net charge of 1 . 2 5 1 0 - 8 C , by what distance will it be deflected from its path due to the Earth's magnetic field after it has traveled 1 . 2 5 km ? Request Answer Incorrect; Try Again; 2
A 3 . 3 5 g bullet moves with a speed of 1 2 5 m

EMR 7 . Determine whether the following statement is True or False. Radio waves have the longest wavelength among all common electromagnetic radiations. It means radio waves have the lowest energy and the lowest frequency. True False
EMR 7 . Determine whether the following statement

A long solenoid with 1 . 8 0 1 0 3 turns per meter and radius 2 . 0 0 cm carries an oscillating current I = 7 . 0 0 s i n 1 2 0 t , where I is in amperes and t is in seconds. ( a ) What is the electric field induced at a radius r = 1 . 0 0 c m from the axis of the solenoid? ( Use the following as necessary: t . Let E be measured in millivolts /
A long solenoid with 1 . 8 0 1 0 3 turns per

[ 0 / 1 Points ] SERCP 1 1 8 . 2 . P . 0 1 0 . PRACTICE ANOTHER system. ) HINT x c m = , m y c m = , m Need Help?
[ 0 / 1 Points ] SERCP 1 1 8 . 2 . P . 0 1 0 .

The circular region with radius R = 6 . 5 5 c m shown in the figure has an electric field directed upwards and perpendicular to the region. The amount of electric flux E through a circle with radius r from the center of the region is given by the expression E ( r ) = ( 2 . 2 5 V ) r What is the magnitude B of the induced magnetic field at a
The circular region with radius R = 6 . 5 5 c m

The angular speed of the hour hand of a clock is Select answer from the options below ( 6 0 / ) rad / s ( / 4 3 2 0 0 ) rad / s ( 1 8 0 0 / ) rad / s ( / 2 1 6 0 0 ) rad / s ( ) rad / s

A long U - tube is partially filled with mercury, with density 1 4 0 0 0 k g m 3 . When 1 0 cm of water ( density 1 0 0 0 k g m 3 ) is poured into the left arm, the mercury in the right arm rises above its original level by: 0 . 7 1 4 cm 3 5 cm 1 4 cm 7 0 cm 0 . 3 5 7 indicates a slide with a question that Quest Learning & Acsen
A long U - tube is partially filled with mercury,

What is the internal energy of 9 . 4 9 mol of an ideal monatomic gas at 2 3 8 K ?
What is the internal energy of 9 . 4 9 mol of an

When certain light rays pass from a vacuum into a block of an unknown material, the measured index of refraction of the material is 3 . 0 0 . A ) 9 . 9 1 0 6 m / s B ) 4 . 8 1 0 7 m / s C ) 1 . 0 1 0 8 m / s D ) 1 . 9 1 0 8 m / s E ) 2 . 9 1 0 8 m / s Ans: C Difficulty: Medium SectionDef: Section 2 6 - 1 What is the speed of light inside the block?

Charges g , and q , exert repulsi forces of 2 0 N on each other. What is the repulsive force when their separation is increase so that their final separation is 1 2 0 % of their initial separation? Sent from my iPhone

Knowing what you do about x - ray diffraction, explain how the color of an opal is angle - dependent ( if at all ) .

A steak hangs by a string from a buoy of mass m , radius r , and height h . The steak s density is approximately that of water ( negligibly more, so it hangs down ) . Take the density of water to be . ( i ) How far beneath the water d is the bottom of the buoy?

Declare a fly procedure for the alien and develop a flying motion. Using an expression, program the alien to fly and land precisely next to a boulder. Using an expression, program the UFO to fly and land precisely next to the alien. Save the project.

An equipotential surface can be described as which of the following? Choose the best answer. a One of an infinite number of level surfaces along which the values of gravity potential are equal b ) One of an infinite number of level surfaces along which the value of acceleration due to gravity are equal c ) Any specially - named level surface along

A 3 0 0 0 pF capacitor is charged to 1 8 4 V and then quickly connected to a 1 8 mH inductor. What is the frequency of osciliation?

During the zombie apocalypse, a horde of zombies is applying a force of 3 0 0 newtons to the middle of a door. On the other side of the door, the brave survivors hold it closed at the handle ( across from the hinges ) . If the door is three feet wide, and the survivors keep it shut, what force must they be applying?

Two capacitors, C 1 = 4 . 0 0 F and C 2 = 9 . 0 F , are connected in parallel, and the resulting combination is connected to a 9 . 0 0 - V battery. ( a ) Find the equivalent capacitance of the combination. 1 3 F ( b ) Find the potential difference across each capacitor. V 1 = 9 VV 2 = 9 V ( c ) Find the charge stored on each capacitor. Q 1 = 3 6

At what altitude above Earth's surface would the gravitational acceleration be 2 . 7 0 m s 2 ? ( Take the Earth's radius as 6 3 7 0 km . )
At what altitude above Earth's surface would the

A steel belted radial automobile tire is inflated to a gauge pressure of 2 . 0 0 x 1 0 ^ 5 Pa when the temperature is 6 7 degree Fahrenheit. Later in the day, the temperature rises to 1 0 3 degrees F . Assuming the volume of the tire remains constant, what is the gauge pressure at the elevated temperature?

On September 1 7 , 1 9 1 8 , an asteroid named ( 4 5 8 7 3 2 ) 2 0 1 1 MD 5 passed Earth at a distance of about 3 5 0 , 0 0 0 km . That's closer than the Moon is to us ! The asteroid has a diameter of about 1 2 0 0 meters. If the ( 4 5 8 7 3 2 ) 2 0 1 1 MD 5 asteroid would have hit, it . . . would have been more destructive than the Tunguska

A roller coaster car ( mass = M ) is on a track that forms a circular loop ( radius = r ) in the vertical plane. If the car is to just maintain contact with the track at the top of the loop, what is the minimum value for its speed at that point? Question 8 Select one: a . rg b . ( rg ) ^ 1 / 2 c . ( 0 . 5 rg ) ^ 1 / 2 d . ( 2 rg ) ^ 1 / 2

Does this represent a health risk to the farmer? LD 5 0 of 3 mg . kg

A glucose solution of viscosity 2 . 2 1 0 3 1 0 3 N s / m 2 N s / m 2 and density 1 0 3 0 kg / m 3 kg / m 3 flows from an elevated open bag into a vein. The needle into the vein has a radius of 0 . 2 0 mmmm and is 3 . 0 cmcm long. All other tubes leading to the needle have much larger radii, and viscous forces in them can be ignored. The pressure

explicitly show the relation between planck density, current radiation density and matter - radiation equality density

An adventurous scientist is going to work in a low temperature environment and decides to create a new temperature scale called the z scale. She decides to call the boiling point of nitrogen as 0

2 . Assume the starting volume of the balloon is 4 1 0 cm ' at 2 5 C ( room temperature. ) Calculate the volume of the balloon when it is in the freezer ( - 1 8 C . )

The equation of a traveling wave is y ( x , t ) = 0 . 0 2 c o s ( 0 . 2 5 x - 5 0 0 t ) , where the units are SI . The velocity of the wave is ? 0 . 0 2 m s 2 0 0 0 m / s 5 1 0 - 4 m s 5 0 0 m s 0 . 2 5 m s
The equation of a traveling wave is y ( x , t ) =

A current of I = 0 . 2 5 A is charging a capacitor that has square plates of area A . What is the displacement current which is passing through the capacitor in amps?

When a nucleus emits a positron, its atomic number Group of answer choices increases by 1 . decreases by 1 . doesn't change.

A 2 2 . 0 kg uniform beam is attached to a wall with a hinge while its far end is supported by a cable such that the beam is horizontal. If the angle between the beam and the cable is = 6 2 . 0 , what is the horizontal component of the force exerted by the hinqe on the beam?
A 2 2 . 0 kg uniform beam is attached to a wall

A 1 0 0 W lightbulb is placed 3 . 5 m from your eyeball, which has a diameter of 2 . 5 cm . Determine how much energy is absorbed by your eye in 2 minutes. E = 0 . 3 8 3 J
A 1 0 0 W lightbulb is placed 3 . 5 m from your

$ 0 0 red blood cells each have a mass of 9 . 0 5 1 0 - 1 4 k g and carry a negative charge spread uniformly over their urfaces . The 1 0 repulsion arising from the excess charge prevents the cells from clumping together. One cell carries - 2 . 3 0 pC and the other - 2 . 6 0 pC , and each cell can be modeled as a sphere 3 . 7 5 1 0 - 6 m in
$ 0 0 red blood cells each have a mass of 9 . 0 5

PROBLEM 6 3 In state - of - the - art vacuum systems, pressures as low as 1 0 - 9 P a are being attained. Calculate the number of molecules in a 1 . 0 0 m 3 vessel at this pressure if the temperature is 2 7 C . ( 2 0 points )
PROBLEM 6 3 In state - of - the - art vacuum

A crate of mass 4 8 kg containing bananas is sliding in a straight line on a frictionless surface at a constant velocity of 1 2 m s . A monkey of mass 3 9 kg hanging from the ceiling times it correctly and jumps vertically down landing in the crate. At the time the monkey lands in the crate his velocity is 1 2 m s vertically downward. What is the
A crate of mass 4 8 kg containing bananas is

Problem 2 ( 5 points ) A block of mass m feels a net force of F ( t ) = F 0 ( e - a t + t 4 ) where F 0 and a are constants. A ) Determine the velocity of the block. ( 2 points ) B ) Calculate the position of the block. ( 2 points ) C ) Determine the integration constants by implementing the following initial conditions: ) = ( 0 and ) = ( 0 .
Problem 2 ( 5 points ) A block of mass m feels a

5 . What is the \ ( \ mathrm { m } / \ mathrm { z } \ ) ( in \ ( \ mathrm { Da } / \ mathrm { z } \ ) ) for an ion accelerated into a 2 kV electric field that is orthogonal to a 1 5 T magnetic field that has a radius of curvature of 5 mm . 8 points
5 . What is the \ ( \ mathrm { m } / \ mathrm { z

How much heat was lost by the water? How much heat was gained by the block? What is the specific heat of the block?

A proton is located at a distance of 0 . 0 5 3 m from a point charge of + 8 . 0 0 C . The repulsive electric force moves the proton until it is at a distance of 0 . 1 6 m from the charge. Suppose that the electric potential energy lost by the system were carried off by a photon. What would be its wavelength? nm
A proton is located at a distance of 0 . 0 5 3 m

Albert Einstein lowers a book of mass m downward a distance h at constant speed v . The work done by . . . the force of gravity is . . . 1 : + , 2 : - , 3 : 0 the force of Albert's hand is . . . 1 : + , 2 : - , 3 : 0
Albert Einstein lowers a book of mass m downward

A 6 . 5 F capacitor is charged by a 1 3 5 V battery ( see the figure ( Figure 1 ) a ) and then is disconnected from the battery. When this capacitor ( C 1 ) is then connected ( see the figure b ) to a second ( initially uncharged ) capacitor, C 2 , the final voltage on each capacitor is 2 5 V . Figure 1 of 1 Part A What is the value of C 2 ? [
A 6 . 5 F capacitor is charged by a 1 3 5 V

8 Multiple Choice 5 points Jebediah is in a circular orbit with a radius of 6 6 0 0 km . Valentina is in an elliptical orbit. She gets as close as 6 5 0 0 km to the Earth's center and travels as far as 6 8 0 0 km away. At what distance from the Earth's center would Valentina have the same speed as Jebediah? 6 6 2 4 . 9 1 km 6 5 0 3 . 0 4 km 3 3 1
8 Multiple Choice 5 points Jebediah is in a

MOVING AMBULANCE An ambulance is creeping up behind you in traffic with its siren on . The highest frequency emitted by the siren is 1 0 7 0 Hz , but the highest frequency that you hear is doppler shifted by 1 5 . 9 Hz . How fast is the ambulance moving if the speed of sound is 3 4 5 m s ? v = Submit 2 . RUNNING FROM THE COPS You are running away
MOVING AMBULANCE An ambulance is creeping up

If 9 9 Tc 4 3 undergoes gamma rays emission, what is produced

Water flows smoothly through a pipe with various circular cross - sections of diameters 2 D , 2 D , 6 D , and,andD ` , respectively.

A mechanical system consiting of the thin rod, a solid disk, and a small solid puck all fixed. What is the mass of the disk of puck - rod - disk system

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