 January 2005, Part 3
 1 2 3 4
41. Electrons oscillating with a frequency of 2.0 × 1010 hertz produce electromagnetic waves. These waves would be classified as

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

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42. In the circuit diagram shown below, ammeter A1 reads 10. amperes. What is the reading of ammeter A2?

(1) 6.0 A
(2) 10. A
(3) 20. A
(4) 4.0 A

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43. According to the Standard Model, a proton is constructed of two up quarks and one down quark (uud) and a neutron is constructed of one up quark and two down quarks (udd). During beta decay, a neutron decays into a proton, an electron, and an electron antineutrino. During this process there is a conversion of a

(1) u quark to a d quark
(2) d quark to a meson
(3) baryon to another baryon
(4) lepton to another lepton

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44. The bright-line emission spectrum of an element can best be explained by

(1) electrons transitioning between discrete energy levels in the atoms of that element
(2) protons acting as both particles and waves
(3) electrons being located in the nucleus
(4) protons being dispersed uniformly throughout the atoms of that element

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45. How much energy is required to move an electron in a mercury atom from the ground state to energy level h?

(1) 1.57 eV
(2) 8.81 eV
(3) 10.38 eV
(4) 11.95 eV

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46. As shown in the diagram below, a 0.50-meter-long spring is stretched from its equilibrium position to a length of 1.00 meter by a weight. If 15 joules of energy are stored in the stretched spring, what is the value of the spring constant?

(1) 30. N/m
(2) 60. N/m
(3) 120 N/m
(4) 240 N/m

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47. Which graph best represents the relationship between the electrical power and the current in a resistor that obeys Ohm's Law? 1 2 3 4
48. Which diagram below does not represent a periodic wave? 1 2 3 4
Base your answers to questions 49 through 50 on the information and diagram below.

An object was projected horizontally from a tall cliff. The diagram below represents the path of the object, neglecting friction. 49. How does the magnitude of the horizontal component of the object’s velocity at point A compare with the magnitude of the horizontal component of the object’s velocity at point B?

(1) A < B
(2) A = B
(3) A > B
(4) this answer cannot be determined since no initial numerical values were given

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50. How does the magnitude of the vertical component of the object’s velocity at point A compare with the magnitude of the vertical component of the object’s velocity at point B?

(1) A < B
(2) A = B
(3) A > B
(4) this answer cannot be determined since no initial numerical values were given Additional Tests
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