PhysicsLAB NY Regents
January 2007, Part 2

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21 If the amplitude of a wave traveling in a rope is doubled, the speed of the wave in the rope will
22 Two waves having the same amplitude and frequency are traveling in the same medium. Maximum destructive interference will occur when the phase difference between the waves is
23 What is the speed of a radio wave in a vacuum?
24 A ringing bell is located in a chamber. When the air is removed from the chamber, why can the bell be seen vibrating but not be heard?

25 As a transverse wave travels through a medium, the individual particles of the medium move

26 A straight glass rod appears to bend when placed in a beaker of water, as shown in the diagram below.
What is the best explanation for this phenomenon?

27 What happens to the speed and frequency of a light ray when it passes from air into water?

28 Parallel wave fronts incident on an opening in a barrier are diffracted. For which combination of wavelength and size of opening will diffraction effects be greatest?

29 Which wave phenomenon occurs when vibrations in one object cause vibrations in a second object?
30 A photon having an energy of 9.40 electronvolts strikes a hydrogen atom in the ground state. Why is the photon not absorbed by the hydrogen atom?

31 Metal sphere A has a charge of –2 units and an identical metal sphere, B, has a charge of –4 units. If the spheres are brought into contact with each other and then separated, the charge on sphere B will be
32 A photon of light traveling through space with a wavelength of 6.0 × 10–7 meter has an energy of
33 What is the net electrical charge on a magnesium ion that is formed when a neutral magnesium atom loses two electrons?
34 The charge of an anti-strange quark is approximately
35 What fundamental force holds quarks together to form particles such as protons and neutrons?
36 A cart travels with a constant nonzero acceleration along a straight line. Which graph best represents the relationship between the distance the cart travels and time of travel?
37 Which graph best represents the relationship between the acceleration of an object falling freely near the surface of Earth and the time that it falls?
38 The diagram below shows a 4.0-kilogram object accelerating at 10. meters per second2 on a rough horizontal surface.
What is the magnitude of the frictional force Ff acting on the object?
39 What is the magnitude of the force needed to keep a 60.-newton rubber block moving across level, dry asphalt in a straight line at a constant speed of 2.0 meters per second?
40 Which graph best represents the relationship between the gravitational potential energy of an object near the surface of Earth and its height above Earth’s surface?

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