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Physics Questions and Answers October 20, 2019

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4 . Two different transparent media with indices of refraction n , > n 2 start off in contact at a flat interface. Monochromatic light is shone through both media from opposite sides, and the wavelength of the light in each medium happens to equal the wavelength in the other medium. Light from each side is partially reflected back into the medium

2 5 . The sides of a small rectangular box are measured to be 1 . 8 0 0 . 0 1 cm , 2 . 0 5 0 . 0 2 cm , and 3 . 1 0 . 1 cm long. Calculate its volume and uncertainty in cubic centimeters.

Please answe # 2 and # 3 . An automobile having a mass of 1 , 0 0 0 k g is driven into a brick wall in a safety test. The bumper behaves like a spring with constant 5 . 1 5 1 0 6 N m and is compressed 2 . 7 5 cm as the car is brought to rest. What was the speed of the car before impact, assuming no energy is lost in the collision with the wall?
Please answe # 2 and # 3 . An automobile having a

1 . To reduce the harmful effects of a stroke, the patient's body is cooled down to 3 2 \ deg C by immersing it in cold water. The mass of the patient is 7 5 kg and the specific heat of the human body is 3 8 5 0 J / kg \ deg C . It is dipped in 1 2 0 liters of water at 3 0 \ deg C . How much ice at - 1 8 \ deg C must be put into the water so that

A 3 kg mass on a spring is stretched 7 cm and then let go . It oscillates back and forth with a period of 1 . 2 s . 2 1 . What is the spring constant k ? a ) 8 2 N / mb ) 6 1 0 N / mC ) 6 4 N / md ) 3 9 N / m 2 3 . What is its position at t = 1 s ? a ) 5 . 4 cmb ) 7 . 0 cmc ) 1 . 2 cmd ) 3 . 5 cm 2 2 . What is the speed when it returns to its

What is the wavelength and range of the error of the wavelength

Two point charges are brought closer together, increasing the force between them by a factor of 2 3 .

Q 3 ) Relativistic Doppler effect Three identical radio emitters transmitting signals at frequency \ ( u _ { 0 } \ ) respective to their own rest frames are moving relative to each other according to the figure below, where \ ( v \ ) is a relativistic velocity. ( a ) What is the frequency of A ' s radio signal as received by B ? [ 2 marks ] ( b )
Q 3 ) Relativistic Doppler effect Three identical

gravity always acts in a direction that is . . . ?

Problem 2 : ( 6 pts ) A solid sphere of radius R is placed at a height of 3 0 cm on a \ ( 1 5 ^ { \ circ } \ ) slope. It is released and rolls, without slipping, to the bottom. From what height should a circular hoop of radius R be released on the same slope in order to equal the sphere's speed at the bottom?
Problem 2 : ( 6 pts ) A solid sphere of radius R

What is the amplitude of the magnetic field a distance of 4 . 3 0 km away from a radio station that is broadcasting isotropically ( in all directions ) with a power of 3 7 . 0 kW ?

Two continuous water waves, one has 1 cm amplitude and another has 5 cm amplitude, interfere with each other. What is the water surface's displacement when a crest meets a trough? 0 cm 4 cm 2 cm 6 cm

a string on a string bas is tuned to vibrate at a fundamental frequency of 7 0 . 0 Hz . If the tension in the string were increased by a factor of 3 , what would be the new fundamental frequency

1 . Just like the change in momentum over time generates a force , the change in angular moment results in a torque . Using the theoretical values for the moments of inertia of the hollow cylinder and disk, determine the torque done on the system when the cylinder is dropped on the disk. Take

what does the alpha partile radiation delivered to lung tissue ) Wt = 0 . 1 2 ) would produce the same effective dose as 3 0 0 Sv of alpha particle radiation deliveerd to the thyrois

a mass vibrates back - and - forth from the free end of an ideal spring K equals 2 0 N / m with an amplitude of 0 . 2 5 m . What is the maximum connect energy of this vibrating mass?

When building a cart wheel, the blacksmith would heat up the metal rim so that it expands and fits over the wooden wheel's rim. If the diameter of the wooden wheel is 1 . 1 5 m and you want the steel ring to shrink 1 . 3 3 mm into the wood ( all around the rim ) once it's cooled off to room temperature ( 2 0 C ) , what temperature does the metal

Block A , with a mass of 4 . 0 kg , is moving with a speed of 2 . 0 m s while block B , with a mass of 8 . 0 kg , is moving in the opposite direction with a speed of 3 . 0 m s . The momentum of the center of mass of the two block system is: 6 0 k g * m s in the same direction as A 1 6 k g - m s in the same direction as A 1 6 k g * m s in the same
Block A , with a mass of 4 . 0 kg , is moving

The airpressure is 1 0 4 8 hPa. Convert it to atm

Show me the steps to solve Consider the three infinite straight parallel long wires shown in the figure. Find the force experienced by 2 5 cm length of wire G .
Show me the steps to solve Consider the three

Two gases at the same temperature must have the same pressure. volume. density. number of molecules. kinetic energy per molecule.

Define orbital Period of a satellite. Write the formula of period of a satellite

A Pascal ( the SI unit of pressure ) is equivalent to which of the following? Show answer choices kg / m N / m kg / m 2 N / m 2

What is the net force? Group of answer choices 1 1 N right 1 N right 1 N left

A pulsar is a rapidly rotating neutron star. Suppose that a particular pulsar has period 3 9 1 0 - 3 s , radius 1 2 . 8 km , and mass 4 . 1 1 0 2 5 k g . Assume the pulsar is spherical in shape. The pulsars rotational period will increase over time due to the release of electromagnetic radiation, which doesnt change its radius but reduces its
A pulsar is a rapidly rotating neutron star.

What is the kinetic energy of a tornado, which has been modelled as a cylinder with a radius of 3 0 0 km , a vertical height of 8 . 0 km , and a linear velocity of 4 0 m / sec ? The mean density of air at sea level is 1 . 2 2 5 kg / m 3 . Use the equation for kinetic energy of a rotating cylinder to be Mass x Velocity 2 .

Light traveling in air is incident on the surface of a block of plastic at an angle of 6 0 . 5 to the normal and is bent so that it makes a 4 9 . 3 angle with the normal in the plastic.

Calculate the driving distance savings matrix. 3 a . 1 . How much is saved if Customer 1 and 2 are served in one route? Enter the correct integer value in the input field. km unanswered 3 a . 2 . How much is saved if Customer 1 and 3 are served in one route? Enter the correct integer value in the input field. km unanswered 3 a . 3 . How much is

3 0 liters of H 2 O is mixed with 5 0 liters of ethanol ( density is 7 8 9 kg / m ^ 3 ) . What is the resulting density of the mixture in Ibm / ft ^ 3 ?

Two long parallel transmission lines 3 7 . 0 cmcm apart carry 2 1 . 0 AA and 7 4 . 5 AA currents. Find all locations where the net magnetic field of the two wires is zero if these currents are in opposite directions. Please, enter your answer as two distances, the first distance from the wire carrying 2 1 . 0 AA , and the second distance from the

Which two particles have opposite charges but the same mass? Group of answer choices beta ( ) particles and positrons protons and positrons alpha ( ) and beta ( ) particles neutrons and protons

A 5 . 4 kg mass is attached to a light cord that is wound around a pulley ( Fig 1 0 . 2 0 ) . The pulley is a uniform solid cylinder of radius 6 cm and a mass of 1 . 7 kg . a ) What is the net torque on the system about the point O ( magnitude and direction ) ? b ) When the mass has a speed v , the pulley has an angular speed w = v / R . Determine

What is the SPEED of a beam of neutrons if their average lifetime is measured to be 1 3 6 1 . 9 s ? At rest, their lifetime is 8 8 5 . 7 s .

The ammeter shown in the figure below reads 2 . 4 2 A . Find the following. ( a ) current I 1 ( in A ) A ( b ) current I 2 ( in A ) A ( c ) emf E ( in volts ) V ( d ) What If ? For what value of E ( in volts ) will the current in the ammeter read 1 . 5 1 A ? V
The ammeter shown in the figure below reads 2 . 4

[ 1 6 pts ] A 1 2 . 5 cm radius wheel pitching machine starts from rest, spinning a ball at the bottom of a vertical circular path at a constant angular acceleration. The ball will exit the machine after 2 . 1 revolutions. Use g = 9 . 8 m s 2 . [ Answer in 3 significant figures ] a ) [ 4 pts ] If the ball exits with an angular speed of 1 3 7 0 rpm
[ 1 6 pts ] A 1 2 . 5 cm radius wheel pitching

2 ( Ch . 4 - 6 ) Help Save & Exit A mango falls straight down to the ground due to Earth's gravity. How would you describe the work done by the Earth's gravitational field on the mango?
2 ( Ch . 4 - 6 ) Help Save & Exit A mango falls

After the force is removed at t = 1 s , is the momentum of the plastic cart greater than, less than, or equal to the momentum of the lead cart?Match

1 ) Consider a ligand with charge of + 1 e and a spherical protein of + 4 e and radius of 2 0 Ain water ( D = 8 0 ) . ( a ) What is the work of bringing the ligand from r = oo to the surface of the protein? ( b ) Now assume there is a hollow cavity of radius a = 5 ^ ( @ ) A inside the protein. The protein cavity is filled with water, and there is
1 ) Consider a ligand with charge of + 1 e and a

A standing wave can be made in a spring by shaking it . If one shakes harder so that each shake has more energy, the wavelength will increase the amplitude will increase the period will increase the frequency will increase
A standing wave can be made in a spring by

The normal ear detects sounds that range from 2 0 Hz to 1 5 , 0 0 0 H z 2 0 Hz to 5 , 0 0 0 H z 2 0 Hz to 1 0 , 0 0 0 H z 2 0 Hz to 2 0 , 0 0 0 H z
The normal ear detects sounds that range from 2 0

Two parallel wires are separated by a distance R as shown in the diagram. As compared to their separation, the wires are very long, extending well beyond the boundaries of the image. Wire 1 carries current I 1 . Wire 2 carries current I 2 in the opposite direction as the first current. Coordinate axes have been included for convenience. Part ( a )
Two parallel wires are separated by a distance R

Suppose Earth had a second moon with the same mass as our current Moon, but at twice the distance. The force of gravity between Earth and the other moon would be: Fg = ( m 1 x m 2 ) / d 2 4 times the force between Earth and our current Moon 4 times the force between Earth and our current Moon 2 times the force between Earth and our current Moon
Suppose Earth had a second moon with the same

Water flows at speed of 4 . 1 m s through a horizontal pipe of diameter 3 . 1 cm . The gauge pressure P 1 of the water in the pipe is 1 . 9 atm . A short segment of the pipe is constricted to a smaller diameter of 2 cm . What is the gauge pressure of the water flowing through the constricted segment? Atmospheric pressure is 1 . 0 1 3 1 0 5 P a .
Water flows at speed of 4 . 1 m s through a

The highest recorded waterfall in the wortd is found at Angat Folls in Varsezueta. Its iongest single watertall has a height of 8 9 7 m . If ivater at the top of the falls is at 1 . 5 . 0 degC what is the maximum temperature of the water at the bottom of the falls? Assume all linetio onerigy of water as it resaches the bottorn goes into raising
The highest recorded waterfall in the wortd is

A centripetal force of 5 . 0 newtons is applied to a rubber stopper moving at a constant speed in a horizontal circle. If the same force is applied, but the radius is made smaller, what happens to the speed, v , and the frequency, f , of the stopper? ( A ) v increases and f increases ( B ) v decreases and f decreases ( C ) v increases and f
A centripetal force of 5 . 0 newtons is applied

A 2 . 2 - cm - tall object is placed 4 . 8 cm in front of a convex mirror with radius of curvature 1 9 cm . Part ( a ) What is the image distance, in centimeters? Include its sign. s ' = Bultat Hatut ( 5 ) I give up ! 2 Submissiou ( s ) Remaining Hints: q , deduction per hint. Hints remaining: q , Feedback: q , deduction per feedback. Paurt ( b )
A 2 . 2 - cm - tall object is placed 4 . 8 cm in

1 . A force F acts on mass m 1 giving acceleration a 1 . The same force acts on a different mass m 2 giving acceleration a 2 = 2 a 1 . If m 1 and m 2 are glued together and the same force F acts on this combination, what is the resulting acceleration? 1 ) 3 / 4 a 1 2 ) 3 / 2 a 1 3 ) 1 / 2 a 1 4 ) 4 / 3 a 1 5 ) 2 / 3 a 1

A spherical, concave mirror with a focal length of 6 cm forms an image of a small object placed 8 cm in front of the mirror. Answer problems 2 4 ) and 2 5 ) . Where will the image be located? What is the magnification, and is it upright or inverted?
A spherical, concave mirror with a focal length

What focal length in centimeters is required for a magnifier if the magnification is to be 3 . 6 ?

( a ) On the basisthat AgCl crystallizes either in a cubic F or a cubic P lattice, index the firstsix reflections. [ 1 0 marks ] ( b ) Calculate the density of AgCl. [ 1 0 marks ] ( c ) What isthe minimum accelerating voltage Vo required to produce the X rays of the wavelength used ( 1 . 5 4 ) ?

Suppose Kevin, a 6 0 . 0 - kg gymnast, climbs a rope. ( a ) What is the tension ( in units of N ) in the rope if he climbs at a constant speed?

A 1 . 5 kg cart attached to an ideal spring with a force constant ( spring constant ) of 2 0 N / m oscillates on a horizontal, frictionless track. At time 0 . 0 s , the cart is released from rest at position x = 1 0 cm from the equilibrium position. ( a ) What is the frequency of the oscillations of the cart? ( b ) Determine the maximum speed of

For each description of the band structure of a solid material, select the best category for that material. partially filled conduction band insulator conductor semiconductor none of these energy gap of about 1 eV between the valence and conduction bands insulator semiconductor none of these conductor
For each description of the band structure of a

4 ) Jennifer is walking at 1 . 2 2 m / s . If Jennifer weighs 5 5 2 N , what is the magnitude of hermomentum? ( g = 9 . 8 m / s ? ) A ) 9 7 . 0 kg m / sB ) 1 3 7 kg m / sC ) 6 8 . 7 kg m / sD ) 6 7 2 kg m / sE ) 9 5 1 kg m / s

A transparent cube with index of refraction n = 1 . 6 and side length a = 4 . 0 c m is free to rotate about an axis passing through its center. A laser beam is aimed at the cube. After passing through the cube the beam hits a screen on the other side forming a spot. The spot is displaced a distance y from the straight line path. The cube is then
A transparent cube with index of refraction n = 1

A fisherman has netted a torpedo ray. As he picks it up , this electric fish creates a short - duration 6 0 V potential difference between his hands. His hands are wet with salt water, and so his skin resistance is a very low 1 0 0 . What current passes through his hands and arms
A fisherman has netted a torpedo ray. As he picks

A large house - fly, that is 3 m away from you, makes a noise of intensity level 4 0 dB . Calculate the noise intensity level of an imaginary swarm of 1 0 0 0 flies at the same location ( assuming negligible interference ) . Also, calculate the noise intensity level if the swarm of flies were to move to a distance of 6 m

A 1 1 7 0 kg 1 1 7 0 kg rocket travels through empty space with velocity 1 5 0 ms / 1 5 0 ms . In order to turn around, the astronaut fires reverse thrusters which, over time, brings the rocket briefly to rest, and then to a velocity 3 8 1 ms / 3 8 1 ms with the rocket now traveling in the opposite direction. During this process, the change in

Above the earth s atmosphere, at an altitude of 4 0 0 km , where the acceleration due to gravity is 8 . 6 9 m / s 2 , a missile with a total remaining mass of 3 0 0 kg is traveling at 5 0 0 m / s , 3 0 from vertical, and is not rotating. The thrust T from each of the missile s four rocket engines is 4 kN . At this instant, three of the four rocket

The angle between the axes of two polarizing filters is 3 7 . 5 .

4 7 . A point source of light is 2 . 5 0 m below the surface of a pool. What is the diameter of the circle of light that a person above the water will see? Assume the water has an index of refraction of refraction of n = 1 . 3 3

An RLC series circuit has a 1 . 0 0 k resistor, a 1 4 5 mH inductor, and a 2 5 . 0 nF capacitor. The rms value of the voltage source is 4 6 0 V . ( a ) What is the resonant frequency of the circuit? What is the condition for resonance? How is the resonant frequency dependent on the components of an RLC circuit? kHz ( b ) What is Irms at resonance?

A 2 0 0 kg sign is hung vertically from an 8 meter long steel cable. If the cable is three times stronger than it needs to be to hold the sign what is its diameter? How much does it stretch when the sign is hung on its end?

An atom is in an excited state for 2 . 3 6 s before moving back to the ground state. ( THIS IS AN EXAM QUESTION. ) 2 7 . Find the minimum uncertainty in energy of the photon in units of 1 0 - 1 0 eV . ( A ) 1 . 3 9 ( B ) 2 . 6 7

Two long, parallel wires are separated by a distance of 3 . 2 0 cmcm . The force per unit length that each wire exerts on the other is 4 . 2 0 1 0 5 N / mN / m , and the wires repel each other. The current in one wire is 0 . 5 2 0 AA . Part A What is the current in the second wire? Express your answer in amperes. Activate to select the

State the direction of vec ( D ) in terms of an angle measured counterclockwise from the positive x - axis. Express your answer in degrees. D =
State the direction of vec ( D ) in terms of an

Immediately outside a conducting sphere of unknown charge Q and radius R the electric potential is 1 9 0 V , and 1 0 . 0 cm further from the sphere, the potential is 1 6 0 V . ( a ) Determine the radius R of the sphere ( in cm ) . cm ( b ) Determine the charge Q on the sphere ( in nC ) . nC ( c ) The electric potential immediately outside another

Sunlight strikes the surface of a lake at an angle of incidence of 2 7 . 2 . At what angle with respect to the normal would a fish see the Sun?

A balloon holding 3 . 0 0 moles of neon ( Ne ) gas absorbs 9 3 5 J of thermal energy while doing 1 4 7 J of work expanding to a larger volume. HINT ( a ) Find the change in the balloon's internal energy ( in J ) . J ( b ) Calculate the change in temperature of the gas ( in K ) . K

0 . 2 moles of an ideal monatomic gas are initially held at 2 9 3 K in a volume of 5 liters. The gas is then subjected to a process in which its pressure is tripled at constant volume. Please answer each of the following questions. a ) What is the initial pressure of the gas? b ) What is the final temperature of the gas? c ) How much heat is added

Sam, whose mass is 8 0 kgkg , takes off across level snow on his jet - powered skis. The skis have a thrust of 2 5 0 NN and a coefficient of kinetic friction on snow of 0 . 1 0 . 1 . Unfortunately, the skis run out of fuel after only 1 1 ss How far has Sam traveled when he finally coasts to a stop? What is Sam's top speed?

A harmonic traveling wave is moving in the negative zdirection with an amplitude ( arbitrary units ) of 2 , a wavelength of 5 m , and a period of 3 s . Its displacement at the origin is zero at time zero. Write a wave equation for this wave ( a ) that exhibits directly both wavelength and period; ( b ) that exhibits directly both propagation

Calculate the rate of heat conduction ( in Watts ) through house walls that are d = 1 3 . 4 cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors. The surface area of the walls is A = 1 0 5 m 2 and their inside surface is at 1 9 . 9 C , while their outside surface is at 5 . 9 9 C .

1 . 4 Dipole in Field The coil above will: A . rotate clockwise, not move B . rotate countercw, not move C . move to the right, no rotation D . move to the left, no rotation E . move in another direction, without rotation F . move and rotate G . no net force so no rotation or Motion

Nocturnal radiational cooling is most intense near the center of a ( an ) _ _ _ _ _ _ .

an object floats with half its volume beneath the surface of the water. the weight of the displaced water is 2 0 0 0 N what is the weight is the object? the density is water is 1 0 0 0 kg / m ^ 3

What is the momentum as a function of time of a 5 kg particle moving with a velocity v = ( 2 . 0 i + 4 . 0 j ) m / s ? What is the net force?

What is the formula for internal energy of this system?
What is the formula for internal energy of this

energy is directly proporcional to freqeuncy. if xray has a very high frequency, we expecte then that the energy emitted by the xray to be . low energy that is not harmful; high energy

The limit to the eye s visual acuity is related to diffraction by the pupil. What is the angle between two just - resolvable points of light for a 2 . 8 5 mm diameter pupil in radians, assuming an average wavelength of 5 5 0 nm ? Take your result to be the practical limit for the eye. What is the greatest possible distance in km a car can be from

Cylinder \ ( A \ ) has a mass of 3 kg and cylinder \ ( B \ ) has a mass of 8 kg . ( Figure 1 ) - Part A Determine the speed of \ ( A \ ) after it has moved 2 m starting from rest. Neglect the mass of the cord and pulleys. Express your answer to three significant figures and include the appropriate units. \ [ v _ { A } = \ square \ text { Value } \
Cylinder \ ( A \ ) has a mass of 3 kg and

A star is moving away from Earth at a speed of 2 . 4 0 0 1 0 8 m s . Light of wavelength 4 1 9 . 0 nm is emitted by the star. What is the wavelength as measured by an Earth observer? nm
A star is moving away from Earth at a speed of 2

Review. A solid sphere of brass ( bulk modulus of 1 4 . 0 1 0 1 0 N m 2 ) with a diameter of 3 . 0 0 m is thrown into the ocean. By how much does the diameter of the sphere decrease as it sinks to a depth of 1 . 0 0 km ?
Review. A solid sphere of brass ( bulk modulus of

Question 4 1 pts Which term can not be used when discussing electric frelds produced by induction? Electric potential Magnetic flux electro - motive force Electric flux
Question 4 1 pts Which term can not be used when

Question 1 6 1 0 pts The electric force between two charges is 3 6 N . What would the force be if the distance between the charges is reduced by one - half? 1 0 N 7 2 N 1 8 N 1 4 4 N
Question 1 6 1 0 pts The electric force between

A solid wheel ( made of two disks of different size ) has a moment of inertia I = 0 . 4 0 0 k g * m 2 . The wheel rotates about a frictionless axle passing through its center. A rope wrapped around the inner radius of the wheel exerts a tangential force of magnitude 1 2 . 0 N at a distance r 2 = 0 . 1 0 0 m from the axle. A second rope, wrapped
A solid wheel ( made of two disks of different

Evaluation of data to find a relationship between torque ans angular acceleration

Given that the average rotational speed of a rotating object is approximately 1 . 2 1 r a d s , and the radius of the object is 2 0 . 1 m , find the translational speed of the object in miles per minute. Notes: 1 mile = 1 6 0 9 . 3 m ; 1 minute = 6 0 s . Multiple Choice 0 . 6 1 9 miles per minute 4 7 . 1 miles per minute 0 . 9 0 7 miles per minute
Given that the average rotational speed of a

( 1 5 points ) By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor. As the plate falls, its momentum has only a vertical component, and no component parallel to the floor. After the collision, the component of the total momentum parallel to the floor must remain zero, since the net
( 1 5 points ) By accident, a large plate is

The primary coil of a transformer has 4 5 4 turns; the secondary coil has 1 0 0 0 turns . An alternating current is sent through the primary coil. The emf in the primary is of amplitude 1 5 . 7 V . What is the emf amplitude in the secondary ?

An engine does 3 0 JJ of work and exhausts 1 0 JJ of waste heat during each cycle. What is the engine's thermal efficiency? If the cold - reservoir temperature is 3 0 C , what is the minimum possible temperature in C of the hot reservoir?

9 . 4 8 . Medical The anterior cruciate ligament in a woman s knee is 2 . 5 cm long and has a cross - sectional area of 0 . 5 4 cm 2 . If a force of 3 . 0 1 0 3 N is applied longitudinally, how much will the ligament stretch?

An Andean condor with a wingspan of 2 7 0 cm and a mass of 1 0 . 0 kg soars along a horizontal path. Model its winds as a rectangle with a width of 4 3 cm

Four 0 . 3 kg masses are held together by light rods in the shape of a square, 0 . 2 1 m on a side. Calculate the moment of inertia about one of the corners of the square.

The heat escape lessening position ( HELP ) involves the victim: Group of answer choices floating on his or her back. swimming and treading water as vigorously as possible. disposing of his or her personal flotation device. remaining as physically quiet as possible.

An ice skater with moment of inertia I 0 is spinning with angular speed w 0 . She pulls her arms in , thereby increasing her angular speed to 4 . Her moment of inertia is then

frequency in hertz of a wave with a wavelength of 7 2 5 nm

An air - filled parallel plate capacitor has round plates and carries a fixed amount of equal but oppositecharge on its plates. All the geometric parameters ofthe capacitor ( plate diameter and plate separation ) are now halved.If the original energy stored in the capacitor was U 0 , the new stored energy is:A . U 0 / 8 B 2 U 0 C U 0 D U 0 / 1 2 E

A car travels at a constant speed around a circular track whose radius is 3 . 0 km . The car goes once around the track in 3 3 0 s . What is the magnitude of the centripetal acceleration of the car?

Water flows through a garden hose which is attached to a nozzle. The water flows through hose with a speed of 2 . 3 1 m / s and through the nozzle with a speed of 2 6 . 3 m / s . Calculate the maximum height ( in m ) to which water could be squirted if it emerges from the nozzle and emerges with the nozzle removed. ( a ) Emerges from the nozzle. m

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