PhysicsLAB NY Regents Exams
June 2004, Part 2

Constants        Formulas

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21. The diagram below shows two identical metal spheres, A and B, separated by distance d. Each sphere has mass m and possesses charge q.

Which diagram best represents the electrostatic force Fe and the gravitational force Fg acting on sphere B due to sphere A?

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22. The table below lists various characteristics of two metallic wires, A and B.

If wire A has resistance R, then wire B has resistance

(1) R
(2) 2R
(3) 3R
(4) 4R

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23. The diagram below represents an electric circuit consisting of a 12-volt battery, a 3.0-ohm resistor, R1, and a variable resistor, R2.

At what value must the variable resistor be set to produce a current of 1.0 amperes through R1?

(1) 6.0 Ω
(2) 9.0 Ω
(3) 3.0 Ω
(4) 12 Ω

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24. The energy of a photon is inversely proportional to its

(1) wavelength
(2) speed
(3) frequency
(4) phase

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25. The energy equivalent of the rest mass of an electron is approximately

(1) 5.1 105 J
(2) 8.2 10-14 J
(3) 2.7 10-22 J
(4) 8.5 10-28 J

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26. A single vibratory disturbance moving through a medium is called

(1) a node
(2) an antinode
(3) a standing wave
(4) a pulse

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27. An electric bell connected to a battery is sealed inside a large jar. What happens as the air is removed from the jar?

(1) The electric circuit stops working because electromagnetic radiation can not travel through a vacuum.
(2) The bell’s pitch decreases because the frequency of the sound waves is lower in a vacuum than in air.
(3) The bell’s loudness increases because of decreased air resistance.
(4) The bell’s loudness decreases because sound waves can not travel through a vacuum.

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28. As a sound wave passes from water, where the speed is 1.49 103 meters per second, into air, the wave’s speed

(1) decreases and its frequency remains the same
(2) increases and its frequency remains the same
(3) remains the same and its frequency decreases
(4) remains the same and its frequency increases

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29. Which phenomenon occurs when an object absorbs wave energy that matches the object’s natural frequency?

(1) reflection
(2) diffraction
(3) resonance
(4) interference

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30. A ray of monochromatic light (f = 5.09 1014 hertz) in air is incident at an angle of 30 on a boundary with corn oil. What is the angle of refraction, to the nearest degree, for this light ray in the corn oil?

(1) 6
(2) 20
(3) 30
(4) 47

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31. A wave is diffracted as it passes through an opening in a barrier. The amount of diffraction that the wave undergoes depends on both the

(1) amplitude and frequency of the incident wave
(2) wavelength and speed of the incident wave
(3) wavelength of the incident wave and the size of the opening
(4) amplitude of the incident wave and the size of the opening

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32. A source of waves and an observer are moving relative to each other. The observer will detect a steadily increasing frequency if

(1) he moves toward the source at a constant speed
(2) the source moves away from him at a constant speed
(3) he accelerates toward the source
(4) the source accelerates away from him

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33. Which wave diagram has both wavelength (λ) and amplitude (A) labeled correctly?

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34. A laser beam is directed at the surface of a smooth, calm pond as represented in the diagram below.

Which organisms could be illuminated by the laser light?

(1) the bird and the fish
(2) the bird and the seaweed
(3) the crab and the seaweed
(4) the crab and the fish

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35. The diagram below represents two waves of equal amplitude and frequency approaching point P as they move through the same medium.

As the two waves pass through each other, the medium at point P will

(1) vibrate up and down
(2) vibrate left and right
(3) vibrate into and out of the page
(4) remain stationary

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36. A constant unbalanced force is applied to an object for a period of time. Which graph best represents the acceleration of the object as a function of elapsed time?

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37. The graph below represents the kinetic energy, gravitational potential energy, and total mechanical energy of a moving block.

Which best describes the motion of the block?

(1) accelerating on a flat horizontal surface
(2) sliding up a frictionless incline
(3) falling freely
(4) being lifted at constant velocity

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38 The diameter of a United States penny is closest to

(1) 100 m
(2) 10-1 m
(3) 10-2 m
(4) 10-3 m

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Base your answers to questions 39 and 40 on the data table below. The data table lists the energy and corresponding frequency of five photons.
 
Photon Energy (J)  Frequency (Hz)
A 6.63 10–15 1.00 1019
B 1.99 10–17 3.00 1016
C 3.49 10–19 5.26 1014
D 1.33 10–20 2.00 1013
E 6.63 10–26 1.00 108

39. In which part of the electromagnetic spectrum would photon D be found?

(1) infrared
(3) ultraviolet
(2) visible
(4) x ray

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40. The graph below represents the relationship between the energy and the frequency of photons. The slope of the graph would be

(1) 6.63 10–34 J•s
(2) 6.67 10–11 N•m2/kg2
(3) 1.60 10–19 J
(4) 1.60 10–19 C





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