Created by Master Student

Physics Practice Test #3

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A very rich boy has an ice hockey practice floor that is essentially frictionless installed in a long refrigerated boxcar. As the train is moving, the boy practices shooting at the goal at the other end of the car. Just as he releases his shot, the train goes around a sharp curve to the left (looking forward in the direction the boy is shooting).Which statement most accurately describes the boy's shot?

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Object A (which is cold) is placed on top of object B (which is hot) in a closed system. Which of the following is the best description of what occurs in the system? I. Both A and B eventually reach the same temperature. II. Gravity stops heat from moving up into A. III. Heat flows from A to B.

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An object is placed 60 cm from a spherical convex mirror. If the mirror forms a virtual image 20 cm from the mirror, what's the magnitude of the mirror's radius of curvature?

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Consider two adjacent transparent media. The speed of light in Medium 1 is v1, and the speed of light in Medium 2 is v2. If v1 < v2, then total internal reflection will occur at the interface between these media if a beam of light is

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When it is known that a net force is operating on an object, it is known that the object is

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A sample of a radioactive substance has a half-life of 20 minutes. If the sample's activity is 200 counts/second, what is the number of counts/second after one hour passes?

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How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20 degrees celsius to 50 degrees celsius if the specific heat of stainless steel is 0.50 kJ/kg e degrees celsius ?

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Traveling at an initial speed of 1.5e6 m/s, a proton enters a region of constant magnetic field, B, of magnitude 1.0 tesla. If the proton's initial velocity vector makes an angle of 30 degrees with the direction of B, compute the proton's speed 4 seconds after entering the magnetic field.

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At the third maxima on both sides of the zeroth fringe in a Young's double slit experiment, the light

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What's the missing particle in the following nuclear reaction?

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A rock is dropped off a cliff and strikes the ground with an impact velocity of 30 m/s. How high was the cliff?

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Consider a light wave that passes from air into a very thick clear glass block that has its opposite internal side mirrored (facing into the glass). The light ray passes into the glass block at an angle greater than 0 degrees and less than 90 degrees, strikes the mirrored surface and reflects back through the glass into the air. What happens while the light ray is in the glass block but before it strikes the mirrored surface?

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A carbon atom decays into a nitrogen atom in the equation below. Which of the quantities correctly finishes the equation?

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A magician pulls a tablecloth from under a table full of dishes without disturbing the dishes. This act demonstrates that

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The frequency of a wave is 4 cycles per second, and its speed is .08 meters per second. What is the wavelength of one of the waves?

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An object is placed inside the focal point of a concave mirror. Which of the following describes the image?

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A soccer ball, at rest on the ground, is kicked with an initial velocity of 10 m/s at a launch angle of 30 degrees. Calculate its total flight time, assuming that air resistance is negligible.

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If a shaft were drilled through the center of the earth and all you had to do was step into the shaft to "fall" to the other side, and a 800N person took the trip, her weight at the exact time she passed through the exact center of the earth would be

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The kinetic energy a pendulum contains 74. Einstein's theory of relativity is based on when it passes through its zero displacement may be decreased by

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A 7.25 kg bowling ball is rolled onto a perfectly level surface at a velocity of 10 m/s. The co-efficient of friction between the surface and the bowling ball is .0025. If the surface is perfectly level and is long enough, how far will the bowling ball roll before it comes to a complete stop?

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Refrigerators and freezers perform their functions by

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Which of the following statements best describes the relationship between two objects that are in thermal equilibrium?

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Which of the following statements is true about an ideal gas contained at a fixed volume when its temperature is raised?

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An electron is allowed to freely move between a pair of parallel plates that have a 1.5 volt potential difference. The electron starts at the negative plate. The velocity of the electron as it strikes the positive plate is most nearly

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Which of the following is an example of a compressional wave?

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According to Einstein's theory of relativity, which of the following would be a correct assumption to make for a traveler in a spaceship traveling at .95c?

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When a switch is closed to operate a DC circuit, the electrons that cause the current

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A woman dancing in high-heeled shoes accidentally steps on her partner's foot with the heel of her shoe. Even though her partner outweighs her by 400N and can easily lift her off the floor, he feels pain because

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The energy obtained in a nuclear reaction is derived from

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If an object's mass and the net force it feels are both known, then Newton's second law could be used to directly calculate which quantity?

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Two high school students attempt to push a car uphill. The car rolls downhill against them for a distance of 10 m before they can bring it to a stop. If both students pushed on the car with a force of 1000N while it rolled downhill, how much work did they do?

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When blue light is shined onto a certain metal, no electrons are ejected. Which of the following lights might eject electrons from the metal?

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A car is driving along a level road at a constant 60 km/hr. The force acting on the car from the tires of the car is

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An object is thrown from a moving vehicle. Which of the following statements is not true? I. The velocity of the object changes. II. The acceleration of the object changes. III. The direction of motion of the object changes.

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A 30N child can push open a 1000N door because

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Which of the following best describes the relationship between the frequency and amplitude of a sound wave?

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A 50 g cube of ice is added to 500 g of boiling water. Which of the following is most likely to occur?

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An unmanned exploratory space vehicle is accelerated to .85c as it leaves the solar system. Years later a stationary extraterrestrial watches the vehicle pass and measures the length of the vehicle to be 12.64 m. What was the length of the vehicle on earth before it began its trip?

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A car, starting from rest, accelerates uniformly at 4 m/s2 along a straight track. How far will it travel in 6 s ?

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A batter hits a long fly ball. Neglecting air resistance, the baseball's horizontal component of speed is constant because it

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