Created by Master Student

Physics Practice Test #2

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Which of the following statements is/are correct about an object that has no unbalanced forces applied to it? I. The object has no velocity. II. The object has no acceleration. III. The object does not move.

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An Olympic diver performs a 3.5 somersault. During his dive he uses the tuck position so that he will have

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A negative ion is an object that has

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A person who normally weighs 900N at sea level climbs to the top of Mt. Everest. While on top of Mt. Everest that person will weigh

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The mass of the atom is

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An observer is 2 m from a source of sound waves. By how much will the sound level decrease if the observer moves to a distance of 20 m ?

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Why do baseball catchers wear mitts rather than just using their bare hands to catch pitched baseballs?

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When green light (wavelength = 500 nm in air) travels through diamond (refractive index = 2.4), what is its wavelength?

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A photon can eject an electron from the surface of a photovoltaic metal if and only if

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A rocket sled rides on a frictionless track while a 1000N force from the rockets accelerates the sled. Suddenly the retrorockets accidentally fire, applying a 1000N force in the opposite direction. The sled will

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A pair of tuning forks produce sound waves that travel through the air. The frequency of the sound waves produced by the first tuning fork is 440 Hz, and the frequency of the sound waves produced by the second tuning fork is 880 Hz. If v1 denotes the speed of the sound waves produced by the first tuning fork and v2 denotes the speed of the sound waves produced by the second turning fork, then

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A rope of length 5 m is stretched to a tension of 80 N. If its mass is 1 kg, at what speed would a 10 Hz transverse wave travel down the string?

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Which wave characteristic describes the product of the frequency and the wavelength?

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Two equal vectors V and V' are added together. All of the following are possible values for the magnitude of the resultant vector EXCEPT

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A battery and a variable resistor are in series with a small fan. A switch is closed, and the fan runs. When the variable resistor is moved slightly to the left, the fan slows down a little. When the variable resistor is moved slightly to the right, the fan speeds up a little. The following question is about the operation of the circuit described. If the variable resistor in the circuit is set all the way to the right, what happens in the circuit? I. The fan runs faster. II. The voltage decreases. III. The current increases.

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Which is due to the change in wave speed when a wave strikes the boundary to another medium?

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A 400N box is suspended motionless from a steel frame by two ropes, A and B, which hang straight up and down. Which of the following statements about the tension in the two ropes is correct?

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The driver of an automobile traveling at 80 km/hr locks his brakes and skids to a stop in order to avoid hitting a deer in the road. If the driver had been traveling at 40 km/hr, how much faster would he have stopped?

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Negative charges are accelerated by electric fields toward points

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The electric field strength at a point some distance away from a source charge does NOT depend on

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A straight wire of length 2 m carries a 10-amp current. How much stronger is the magnetic field at a distance of 2 cm from the wire than it is at 4 cm from the wire?

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A laboratory centrifuge starts from rest and reaches a rotational speed of 8,000 radians/ sec in a time of 25 seconds. What is the angular acceleration of the centrifuge?

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A 12,500 kg boxcar rolling through a freight yard has a velocity of 1 m/s when it strikes another boxcar of the same mass that is at rest. Both cars stick together and continue to roll down the track with a momentum of

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What is the major product of the fission reaction of 235 U? The basic fission reaction is

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The symbols used in writing nuclear equations. Atomic nuclei are typically written in the form . Which letter represents the protons plus neutrons in the nucleus?

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A father holds his child on his shoulders during a parade. The father does no work during the parade because

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Which of the following would be half as great at a distance of 2R from a source charge than it would be at a distance of R from the charge? I. Electric force on another charge II. Electric field due to the source charge III. Electric potential due to the source charge

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A rocket is launched into the air during a fireworks show. Which of the following statements about the parts of the rocket is appropriate immediately after the explosion?

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A photovoltaic metal absorbs a photon of yellow light and immediately emits an ultraviolet photon. This is called

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Which of the following is/are true concerning magnetic forces and fields? I. The magnetic field lines due to a current-carrying wire radiate away from the wire. II. The kinetic energy of a charged particle can be increased by a magnetic force. III. A charged particle can move through a magnetic field without feeling a magnetic force.

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Refrigeration is a process through which

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Which of the following best describes the condition of an enclosed gas during an adiabatic compression?

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Einstein's theory of relativity states that all the laws of nature are the same in

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The current through a 20ohm resistor connected to a 12V battery is

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Two children are riding a merry-go-round. Child (P) rides on a pony on the outside rim of the merry-go-round, while Child (L) rides a lion on the inside rim of the merry-goround. At the end of the ride, which of the following statements is true?

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What is the centripetal acceleration on the rim of a wagon wheel of 44 cm diameter if the wagon is being pulled at a constant 2.5 m/s?

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A toy rocket is launched straight up. At the exact top of its flight path, which of the following is true?

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At the surface of the earth, an object of mass m has weight w. If this object is transported to an altitude that's twice the radius of the earth, then, at the new location,

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Two objects, one of mass 3 kg and moving with a speed of 2 m/s and the other of mass 5 kg and speed 2 m/s, move toward each other and collide head-on. If the collision is perfectly inelastic, find the speed of the objects after the collision.

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ater has the specific heat 4.186 kJ/kg* degrees celsius, a boiling point of 100 degrees celsius, and a heat of vaporization of 2,260 kJ/kg. A sealed beaker contains 100 g of water that's initially at 20 degrees celsius. If the water absorbs 100 kJ of heat, what will its final temperature be?

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