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Physics Questions and Answers September 18, 2019

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( a ) What magnitude point charge creates a 4 0 , 0 0 0 N / C electric field at a distance of 0 . 2 3 5 m ?

The temperature of 2 . 0 0 mol of an ideal monatomic gas is raised 6 . 9 K at constant volume. What is the change in the average kinetic energy per mole?

a thin cylindrical ring starts from rest at a height h 1 = 8 2 m . the ring has a radius R = 3 8 cm and a mass M = 1 0 kg . if the ring rolls ( without slipping ) all the way to point 2 , what is the ring's energy at point 2 in terms of h 2 and v 2 ?

Part A What is the angular momentum of the system of child and turntable before the child starts any outward radial movement? Remember that you are expected to treat the child as a point mass. \ [ \ mathrm { kg } \ cdot \ mathrm { ~m } ^ { 2 } / \ mathrm { s } \ ] Incorrect; Try Again; 8 attempts remaining
Part A What is the angular momentum of the system

The maximum possible efficiency of a heat engine is determined by

Ultraviolet light with a frequency of 7 . 8 8 1 0 1 5 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 4 . 1 eV . What is the work function ( in eV ) of the metal?

A 8 . 0 0 - cm - long wire is pulled along a U - shaped conducting rail in a perpendicular magnetic field. The total resistance of the wire and rail is 0 . 3 5 0 . Pulling the wire at a steady speed of 4 . 0 0 m / sm / s causes 4 . 0 0 WW of power to be dissipated in the circuit.

One mole of an ideal gas initially at a temperature of Ti = 2 . 8 degrees C undergoes an expansion at a constant pressure of 1 . 0 0 atm to seven times its original volune. Calculate the new temperature Tf of the gas. b ) Calculate the work done on the gas during the expansion

A block with a mass of 0 . 3 0 kgkg is attached to a horizontal spring. The block is pulled back from its equilibrium position until the spring exerts a force of 1 . 2 NN on the block. When the block is released, it oscillates with a frequency of 1 . 2 HzHz . Part A How far was the block pulled back before being released? Express your answer with

What is the escape speed from a planet of mass M and radius R if M = 3 . 2 x 1 0 ^ ( 2 3 ) kg and R = 2 . 4 x 1 0 ^ ( 6 ) m . Write your answer in km / s rounding to first decimal place.

A . When the block arrives at point C ( where it comes to a stop ) from point B at the bottom of the hill, - - - Select - - - kinetic gravitational potential spring potential electric potential thermal chemical energy has decreased and - - - Select - - - kinetic gravitational potential spring potential electric potential thermal chemical energy

Which type of exposure is due to radioactive material such as particles or dust that physically attaches to or enters the body.

A uniform rod of mass 2 3 0 g and length 1 0 0 cm is free to rotate in a horizontal plane around a fixed vertical axis through its center, perpendicular to its length. Two small beads, each of mass 2 2 g , are mounted in grooves along the rod. Initially, the two beads are held by catches on opposite sides of the rod's center, 1 4 cm from the axis

Your science teacher has assigned you the task of building a water barometer. You have learned that the pressure of the atmosphere can vary by as much as 5 % from standard atmosphere as the weather changes. ( a ) What minimum height must your barometer have? ( b ) One stormy day the TV weather says, "The barometric pressure this afternoon is a low

Anne is working on a research project that involves the use of a centrifuge. Her samples must first experience an acceleration of 1 0 0 g , but then the acceleration must increase by a factor of eight. By How much will the rotational speed v have to increase?

A uniform electric field of magnitude E = 2 * 1 0 ^ 3 * N / C is applied between two parallel plates that are separated by a distance of d = 0 . 5 m . The potential at the negative plate is V _ { 1 } = 0 V What is the potential at the positive plate? What is the potential difference between the plates? A proton ( charge q = 1 . 6 * 1 0 ^ - 1 9 Cq

8 A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant ( a ) linear speed, ( b ) angular speed, ( c ) angular momentum. ( d ) kinetic energy. ( e ) potential energy. ( f ) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun. Which of the following symptoms is
8 A comet orbits the sun in a highly elliptical

Measuring the ratio of primordial deuterium to hydrogen in intergalactic gas clouds allows us to set a limit on the total amount of mass in the universe the density of ordinary ( baryonic ) matter the universe the acceleration of the universe the current age of the universe
Measuring the ratio of primordial deuterium to

When the pressure on nn moles of helium gas is suddenly changed from an initial value of p 1 p 1 to a final value of p 2 p 2 , the density of the gas changes from its initial value of 1 1 to a final value of 2 = 1 ( p 2 / p 1 ) 3 / 5 2 = 1 ( p 2 / p 1 ) 3 / 5 . If the initial absolute temperature of the gas is T 1 T 1 , what is its final absolute

A small rectangular loop of length I = 1 0 c m and width w = 8 . 0 c m with resistance R = 2 . 0 is pulled at a constant speed v = 2 . 0 c m s through a region of uniform magnetic field B = 2 . 0 T , pointing into the page. as shown in Figure Q - 3 . At t = 0 , the front of the rectangular loop enters the region of the magnetic field. Figure Q - 3
A small rectangular loop of length I = 1 0 c m

What is the radius of the event horizon for a black hole with a mass 7 . 0 times the mass of the sun? This distance is called the Schwarzschild radius.

In an AC RLC circuit, the peak current occurs when the frequency is set to the resonance frequency.

The equation of a transverse wave traveling along avery long string is y = 3 . 5 0 sin ( 0 . 0 4 1 7 nx + 5 . 3 8 nt ) , where x and y are expressed in centimeters and t is in seconds. Determine ( a ) the amplitude, ( b ) the wavelength, ( c ) the frequency, ( d ) the speed, ( e ) the direction of propagation of the wave and ( f ) the maximum

A spherically spreading EM wave comes from a 1 8 0 0 W source. Part A At a distance of 4 . 1 m , what is the intensity? Express your answer using two significant figures. Correct Part B What is the rms value of the electric field? Express your answer using two significant figures. \ [ E _ { \ mathrm { rms } } = \ ] \ [ \ mathrm { V } / \ mathrm {
A spherically spreading EM wave comes from a 1 8

A rubber ball is shot straight up from the ground with speed \ ( v \ ) . Simultaneously, a second rubber ball at height \ ( h \ ) directly above the first ball is dropped from rest. 1 . At what height above the ground do the balls collide? Your answer will be a symbolic expression in terms of \ ( v , h \ ) , and \ ( g \ ) . NOTE:Use " * + - / "
A rubber ball is shot straight up from the ground

Increasing the period of an oscillator increases the firquency of its oscillation. True False
Increasing the period of an oscillator increases

A woman sitting in a parked car hears an approaching police siren at a frequency f 1 . As it passes her and moves away, she then hears the siren at a frequency f 2 . Which of the following correctly states the relationship between the observed frequencies f 1 and f 2 and the actual frequency f 0 of the source? f 2 = f 0 = f 1 f 0 f 1 f 0 f 1 f 1 f
A woman sitting in a parked car hears an

An electron moves at 2 . 4 0 1 0 6 6 m / sm / s through a region in which there is a magnetic field of unspecified direction and magnitude 7 . 9 0 1 0 2 2 TT .

The temperature of 3 . 7 6 g of helium is increased at constant volume by T . What mass of oxygen can have its temperature increased by the same amount at constant volume using rhe same amount of heat

two circular coils are concentric and lie in the same plane. the inner coil contains 1 2 0 turns of wire, has a radius of 0 . 0 1 2 m , and carries a current of 7 . 9 A . the outer coil contains 1 4 0 turns and has a radius of 0 . 0 2 1 m . what must be the magnitude of the current in the outer coil, such that the net magnetic field at the common

A 1 . 0 5 kg mass oscillates according to the equation x = 0 . 7 0 0 c o s 8 . 5 0 t , where x is in meters and t is in seconds. Part A Determine the amplitude.
A 1 . 0 5 kg mass oscillates according to the

A man of mass m = 5 2 kg moves at a velocity vi = 1 . 5 2 m / s before jumping on a skateboard that is initially at rest. After jumping on the board the man has a velocity vf = 1 . 4 m / s .

Laura throws a tennis ball ( mass = 0 . 0 5 7 0 k g ) vertically upward. The ball returns to the point of release after 4 . 2 0 s . What is the acceleration
Laura throws a tennis ball ( mass = 0 . 0 5 7 0 k

We can also calculate the torque in a more formal way using vector components. Recall that the cross product of two vectors vec ( A ) and vec ( B ) can be calculated as follows. vec ( A ) vec ( B ) = ( A y B z - A z B y ) h a t ( i ) + ( A z B x - A x B z ) h a t ( j ) + ( A x B y - A y B x ) h a t ( k ) Let's examine the same situation again,
We can also calculate the torque in a more formal

A B - flat clarinet and concert flute have roughly the same length. However, the lowest harmonic ( fundamental ) of the flute is about twice the frequency ( an octave higher ) than that of the clarinet. The main reason for this is that
A B - flat clarinet and concert flute have

A 4 0 . 0 liter gas tank is filled to the brim with gasoline when the temperature is 5 . 0 0 C . Gasoline has a coefficient of volume expansion of 9 5 0 1 0 - 6 / C . If the gas tank is moved into the sun of a hot summer day, the temperature of the gas tank is increased to 6 0 . 0 C . What is the volume of gasoline that overflows the tank ( ignore

Does it seem obvious that matter does really exist?

Six objects are placed in a 5 0 0 F F ( 2 6 0 C C ) oven and allowed to reach thermal equilibrium. Each object has a mass of 1 . 0 kgkg . The specific heat and thermal conductivity of each substance are denoted by cc and kk . Part A Rank these objects on the basis of their temperatures when removed from the oven. Rank from largest to smallest. To

rart A What is the wavelength, in nm , of a photon with energy 0 . 3 0 eV ? Express your answer in nanometers. \ [ \ lambda = [ \ quad ] \ mathrm { nm } \ ] Part B Is this wavelength visible, ultraviolet, or infrared light? visible light ultraviolet light infrared light Request Answer Part C What is the wavelength, in nm , of a photon with energy

A person exerts a horizontal force of 3 1 NN on the end of a door 9 9 cmcm wide. What is the magnitude of the torque if the force is exerted perpendicular to the door? What is the magnitude of the torque if the force is exerted at a 6 0 . 0 angle to the face of the door?

A rod and two balloons A very thin glass rod 4 meters long is rubbed all over with a silk cloth. It gains a uniformly distributed charge 1 . 8 1 0 6 C . Two small spherical rubber balloons of radius 1 . 2 cm are rubbed all over with wool. They each gain a uniformly distributed charge of - 7 1 0 8 C . The balloons are near the midpoint of the glass

RNEK: 1 2 - 2 5 . Yukar ya do ru hareket eden bir roketin ivmesi, s metre cinsinden olmak zere , a = ( 6 + 0 . 0 2 s ) m s 2 dir. Roketin s = 1 0 0 m y ksekli ine ula mas i ingerekli zaman belirleyiniz. i = 0 ba lang an nda v = 0 ve s = 0 d r r . ORNEK: * 1 2 - 3 6 . Bir u ak duragan halden harekete baslar, pistte 1 5 0 0 m ilerler ve sabit ivmeli
RNEK: 1 2 - 2 5 . Yukar ya do ru hareket eden bir

When the distance between a point source of light and a light meter is reduced from 6 . 0 m to 2 . 0 m , the intensity of illumination at the meter will be the original value multiplied by: 1 3 1 / 9 1
When the distance between a point source of light

Shoot the Monkey ( Honors ) A hunter is on the ground waiting in some bushes to hunt some monkeys. The hunter spots a monkey hanging in a tree that is 4 0 m away ( horizontally ) and 3 0 m high ( vertically ) . The hunter aims the gun directly at the monkey and shoots. However, the smart monkey lets go of the tree as soon as the bullet is shot. If
Shoot the Monkey ( Honors ) A hunter is on the

A baseball of mass m 1 = 0 . 4 3 kgm 1 = 0 . 4 3 kg is thrown at another ball hanging from the ceiling by a length of string L = 1 . 5 5 mL = 1 . 5 5 m . The second ball m 2 = 0 . 6 4 kgm 2 = 0 . 6 4 kg is initially at rest while the baseball has an initial horizontal velocity of V 1 = 2 . 5 m / sV 1 = 2 . 5 m / s . After the collision the first

A 6 0 - kgkg skater initially at rest throws a 4 . 0 - kgkg medicine ball horizontally to the left. Suppose the ball is accelerated through a distance of 1 . 0 mm before leaving the skater's hand at a speed of 7 . 0 m / sm / s . Assume the skater and the ball to be point - like, the surface to be frictionless, and ignore air resistance. Use a

You have a resistor of resistance 2 2 0 , an inductor of inductance 0 . 4 5 0 HH , a capacitor of capacitance 6 . 4 0 FF and a voltage source that has a voltage amplitude of 3 3 . 0 VV and an angular frequency of 2 9 0 rad / srad / s . The resistor, inductor, capacitor, and voltage source are connected to form an L - R - C series circuit.

6 . A friend lends you the eyepiece of his microscope to use on your own microscope. He claims the spatial resolution of your microscope will be halved, since his eyepiece has the same diameter as yours but twice the magnification. Is his claim valid? Explain.
6 . A friend lends you the eyepiece of his

Two parallel wires separated by 3 . 8 0 cm repel each other with a force per unit length of 1 . 6 0 x 1 0 - 4 N / m . The current in one wire is 5 . 4 5 A . ( a ) Find the current in the other wire. 5 . 5 8 A ( b ) Are the currents in the same direction or in opposite directions? the same direction opposite directions

If the absolute temperature of an object is uipled. the thermal power radiated by this object ( assuming that its emissivity and size are not affected by the temperature change ) will increase by a factor of 2 7 . increase by a factor of 8 1 . increase by a factor of 3 . increase by a factor of 9 . increase by a factor of 1 8 .
If the absolute temperature of an object is

4 . ( 1 0 points ) A submarine is submerged to a shallow depth in the Pacific ocean on a calm day. An enemy reconnaissance UAV flies over the submarine 3 km above the surface of water. What is the apparent height of the UAV above the surface as viewed from the submarine? Use both the direct approach involving Snell's law and the small angle
4 . ( 1 0 points ) A submarine is submerged to a

Consider the diagram below a ) The roller coaster is pulled up to point A where it , and its screaming occupants, are released from rest. Assuming no friction, calculate the speed of the coaster at points B , C , and D . Show your work. b ) Now, suppose the roller coaster passes point A with a speed of 1 . 7 0 m s . If the work done by friction is
Consider the diagram below a ) The roller coaster

What are the functions describing the two equal - amplitude waves traveling in opposite directions that make up the standing wave?

( 1 pt . ) As a spinning ice skater pulls his arms and legs inward toward his body, you observe that his spin rate increases. This is due to the fact that which one of the following quantities remains roughly constant? A . rotational kinetic energy D . angular momentum B . moment of inertia E . angular velocity C . rotational frequency
( 1 pt . ) As a spinning ice skater pulls his

Lab 4 - Newton's Laws Worksheet Displacement of the air car: x = q , 1 . 0 0 meter Total mass of the air car: m 1 = q , 3 8 8 . 8 7 g Table 1 : Trip time data 6 . 7 6 - 6 . 5 8 \ table [ [ \ table [ [ Hanging mass ] , [ m 2 ( k g )
Lab 4 - Newton's Laws Worksheet Displacement of

A traveling wave along the x - axis is given by the following wave function ( x , t ) = 4 . 3 cos ( 1 . 3 x - 1 1 . 2 t + 0 . 3 2 ) , where x in meter, t in seconds, and in meters. Read off the appropriate quantities for this wave function and find the following characteristics of this plane wave: The amplitude in meters.

Required information A ball weighing 2 0 . 7 N is tied to a string fixed to the ceiling. The string makes a 2 6 . 2 angle with the ceiling. Initially, the ball is held in place by a force vec ( F ) that is perpendicular to the string. 1 = 2 6 . 2 What is the tension in the string? N
Required information A ball weighing 2 0 . 7 N is

The focal length of a mirror can be determined entirely from the shape of the mirror. In contrast, to determine the focal length of a lens we must know both the shape of the lens and its index of refraction - and the index of refraction of the surrounding medium. For instance, when a thin lens is immersed in a liquid we must modify the thin - lens

An object is 3 0 cm in front of a converging lens with a focal length of 1 0 cm

If the inductor were to open, what would happen to each of the following ( a ) the total current in the circuit ( b ) the phase angle between the generator voltage and across ( c ) the generator voltage

Two solid disks, which are free to rotate independently about the same axis that passes through their centers and perpendicular to their faces, are initially at rest. The two disks have the same mass, but one has a radius R and the other has a radius 2 R . A force of magnitude F is applied to the edge of the larger radius disk and it begins

A cube 1 7 cmcm on each side contains 3 . 3 gg of helium at 2 0 C C . 1 4 0 0 JJ of heat energy are transferred to this gas. Part A Part complete What is the final pressure if the process is at constant volume? Express your answer with the appropriate units. View Available Hint ( s ) for Part A pp = 6 . 0 1 0 5 PaPa SubmitPrevious Answers Correct

In order for the spring to exert no restoring force at all, the oscillation would have to be so Blank that the highest point is at or Blank the initial, unweighted equilibrium end of the spring. In this case, as the mass passes through the point where the unstretched end of the spring would hang if unweighted, the spring would momentarily exert no

What is the effect on the period of a pendulum if you decrease its length by 5 . 0 0 % ?

During a collision with a wall, the velocity of a . 2 kg ball changes from 2 0 m / s toward the wall to 1 2 m / s away from the wall. If the time the ball was in contact with the wall was 6 0 ms , what was the magnitude of the average force applied to the ball?

An electron is accelerated to a speed where its total energy is 2 1 8 times larger than its rest energy. How many times is the kinetic energy of the electron larger than its rest energy? Tries 0 / 2 0 What is the kinetic energy of the electron? Tries 0 / 2 0 What is the speed of the electron in terms of the speed of light? ( In this part of the

The photoelectric work function of potassium is 2 . 3 eVeV. Light that has a wavelength of 1 2 0 nmnm falls on potassium.

A gas is enclosed in a cylinder fitted with a light frictionless piston and maintained at atmospheric pressure. When 2 5 4 kcalkcal of heat is added to the gas, the volume is observed to increase slowly from 1 2 . 0 m 3 m 3 to 1 6 . 2 m 3 m 3 . Part A Calculate the work done by the gas. Express your answer with the appropriate units. Activate to

two events occur in an inertial system K at the same time but 6 km apart. What is the time difference ( in s ) measured in a system K ' moving parallel to these two events when the distance separation of the events is measured to be 8 km in K ' ?

A single - turn square loop of wire, 2 . 0 0 cm on each edge, carries a clockwise current of 0 . 2 3 0 A . The loop is inside a solenoid, with the plane of the loop perpendicular to the magnetic field of the solenoid. The solenoid has 3 0 . 0 turns / cm and carries a clockwise current of 1 5 . 0 A . ( a ) Find the force on each side of the loop. (

A series RLC circuit consists of a 9 9 . 0 resistor, a 0 . 2 0 0 HH inductor, and a 4 0 . 0 FF capacitor. It is attached to a 1 2 0 V / 6 0 Hz power line. Part A What is the peak current II at this frequency? Express your answer with the appropriate units. Activate to select the appropriates template from the following choices. Operate up and down

Question 1 0 1 1 pts At what rate would the current in a 1 0 0 - mH inductor have to change to induce an emf of 1 0 0 0 V in the inductor? 1 0 , 0 0 0 A / s 1 0 0 A s 1 A s 1 0 0 0 A / s 1 0 A s
Question 1 0 1 1 pts At what rate would the

In the figure drawn, a square loop of side 0 . 5 0 m lies in the plane of the page and carries a current of 8 . 0 A passing counterclockwise through it . What is the magnetic field at the center ( O ) of the loop? And in what direction points? ( 2 points ) A . 1 . 9 1 0 - 6 T , into the page B . 1 . 9 1 0 - 6 T , out of the page C . 7 . 5 1 0 - 6
In the figure drawn, a square loop of side 0 . 5

Compare E x 1 and E x 2 , the values of the x - component of the electric field at t = 0 . E x 1 is evaluated at ( x = 0 , y = 0 , z = z m a x ) , while E x 2 is evaluated at ( x = ( : n m , y = n m , z = z m a x } . E x 1 = E x 2 E x 1 > E x 2 E x 1 E x 1 = E x 2 E x 1 > E x 2
Compare E x 1 and E x 2 , the values of the x -

Using a conventional two - slit apparatus with light of wavelength 6 6 2 nm , 3 0 bright fringes per centimeter are observed on a screen 2 . 9 m away. What is the slit separation?

Select all diagrams that provide a correct qualitative accounting of the energy as the block slides down the rough surface. \ table [ [ { : [ + 1 ] 0 - u b r a c e ( + u b r a c e ) i n i t i a l U i + K i = ubrace ( U f + K f + E n . c . ubrace ) f i n a l , , - ubrace ( + 1 ubrace ) u b r a c e ( U i + K i ubrace ) i n i t i a l = ubrace ( U f +
Select all diagrams that provide a correct

What is the heat required to melt 1 kg of ice into water? Knowing that L f of ice is 3 3 4 k J k g . 3 3 4 0 0 0 J Both are correct 3 3 4 kJ
What is the heat required to melt 1 kg of ice

1 . What conditions must be true to say an object is in static equilibrium?

The masnetic fild component of the EM plane wave in problem 1 ) osallates along the: a ) x - axis, with B y = B z = 0 b ) y - axis, with B x = B 2 = 0 c ) 2 - axis, with B y = B x = 0
The masnetic fild component of the EM plane wave

What is the angle between [ - 1 0 3 ] and [ 1 1 1 ] direction vectors in the cubic system?
What is the angle between [ - 1 0 3 ] and [ 1 1 1

A woman of mass 5 8 kg jumps off the bow of a 4 7 kg canoe that is intially at rest. If her velocity is 3 . 5 m / s to the right, what is the velocity of the canoe after she jumps?

For any given molecule, by what factor must the temperature change in order for vrms to double? Select answer from the options below The temperature must decrease by a factor of 2 . The temperature must increase by a factor of 4 . The temperature must increase by a factor of 2 . Temperature has no effect on rmsvrms . The temperature must decrease

A conducting rod ( length ( : = 8 0 c m } rotates at a constant angular rate of 1 5 revolutions per second about a pivot at one end. A uniform field ) = ( 6 0 m T is directed perpendicularly to the plane of rotation. What is the magnitude of the emf induced between the ends of the rod? 2 . 7 V 2 . 1 V 2 . 4 V 1 . 8 V
A conducting rod ( length ( : = 8 0 c m } rotates

Three sheets of plastic have unknown indices of refraction. Sheet 1 is placed on top of sheet 2 , and a laser beam is directed onto the sheets from above so that it strikes the interface at an angle of 2 6 . 5 deg with the normal. The refracted beam in sheet 2 makes an angle of 3 1 . 1 deg with the normal. The experiment is repeated with sheet 3

Which of the following statements are true about electron spin? ( i ) There are two allowed values for the spin quantum number, s . ( ii ) There are two allowed values for the spin projection quantum number, s . ( iii ) The component of an electron's spin angular momentum along the z - axis is quantized into three possible values ( called "spin up

A double - slit interference pattern is observed on a screen 1 . 0 m behind two slits

A resistor with RR = 3 0 . 0 and an inductor with LL = 0 . 6 0 0 HH are connected in series to a battery that has emf 8 0 . 0 VV and negligible internal resistance. At time tt after the circuit is completed, the energy stored in the inductor is 0 . 4 0 0 JJ . At this instant, what is the voltage across the inductor?

Consider the following statements. A 1 : I = 0 A 2 : I = V R A 3 : I = V R e 1 / ( RC ) B 1 : VC = 0 B 2 : VC = V B 3 : VC = V e 1 / ( RC ) Immediately after the switch is closed, iden tify the current I through R and the potential VC across the capacitor, respectively

Suppose a straight 1 . 0 0 - m m - diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field B , which is horizontal, perpendicular to the wire, and of magnitude 5 . 0 1 0 - 5 T . What current would the wire carry? Does the answer seem feasible? Explain briefly:
Suppose a straight 1 . 0 0 - m m - diameter

In the two - slit experiment of the figure, let angle be 2 3 . 5 , the slit separation be 4 . 6 7 m , and the wavelength be = 5 0 2 n m . ( a ) What multiple of gives the phase difference between the waves of rays r 1 and r 2 when they arrive at point P on the distant screen? ( b ) What is the phase difference in radians? L
In the two - slit experiment of the figure, let

An underground pipe with a diameter of 5 . 0 cm goes through the floor of an apartment building with a gauge pressure of 3 . 8 atm and a speed of \ ( 0 . 6 8 \ mathrm { ~m } / \ mathrm { s } \ ) . The pipe goes up to the kitchen in the 2 nd floor 1 8 m above, and the pipe narrows to a diameter of 2 . 8 cm by the time it reaches the kitchen. The
An underground pipe with a diameter of 5 . 0 cm

A 5 0 . 0 g marble moving at 2 . 1 0 m s strikes a 3 0 . 0 g marble at rest. Note that the collision is elastic and that it is a "head - on " collision so all motion is along a line. Part A What is the speed of 5 0 . 0 g marble immediately after the collision? Express your answer with the appropriate units. ( v f x ) 5 0 , 0 g = Previous Answers
A 5 0 . 0 g marble moving at 2 . 1 0 m s strikes

A merry - go - round is a common piece of playground equipment. A 3 . 0 - m - diameter merry - go - round, which can be modeled as a disk with a mass of 2 6 0 kg , is spinning at 1 7 rpm . John runs tangent to the merry - go - round at \ ( 5 . 8 \ mathrm { ~m } / \ mathrm { s } \ ) , in the same direction that it is turning, and jumps onto the
A merry - go - round is a common piece of

What is the magnitude of the torque about the origin? A ) r F sin B ) r F cos Answer: r F cos Try again. What is the torque about the origin? A ) r F sin B ) r F cos Answer: r F sin p 1 i p 1 f p 2 i r F axis rF axis

A 1 4 0 hp crane lifts a 3 1 0 0 lb load at a constant speed to a height of 1 3 5 ft in 2 9 s . Part A How efficient is the crane in this situation?
A 1 4 0 hp crane lifts a 3 1 0 0 lb load at a

Graded 2 : State whether the light bulbs below are a ) in series b ) in parallel or c ) neither. Remember that if resistances are in series, the current through each must be the same. If resistances are in parallel, the voltage across each is the same since their ends are connected together: Bulbs 1 and 2 : Bulbs 1 and 3 : Bulbs 2 and 3 : Branch
Graded 2 : State whether the light bulbs below

A child's toy consists of a block that attaches to a table with a suction cup, a spring connected to that block, a ball, and a launching ramp. ( Figure 1 ) The spring has a spring constant \ ( 6 3 . 0 \ mathrm { ~N } / \ mathrm { m } \ ) , the ball has a mass 0 . 3 0 3 kg , and the ramp rises a height 0 . 0 8 5 m above the table, the surface of
A child's toy consists of a block that attaches

the decay constant of 2 3 5 U is 9 . 8 * 1 0 ^ - 1 0 y ^ - 1 . a . compute the half life

High - altitude mountain climbers do not eat snow, but always melt it first with a stove. To see why, calculate the energy absorbed from a climber's body under the following conditions. The specific heat of ice is 2 1 0 0 J k g * C , the latent heat of fusion is 3 3 3 k J k g , the specific heat of water is 4 1 8 6 J k g * C . Part A Calculate the
High - altitude mountain climbers do not eat

the index of refraction of zircon in

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