____ has (have) wavelengths that are shorter than visible light. I. Gamma-rays II. Ultraviolet light III. Infrared radiation IV. X-rays
a. I & II
b. I & IV
c. II & III
d. II, III, & IV
e. I, II, & IV
E
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The particles in the nucleus referred to as nucleons are
A. electrons and protons. B. protons and neutrons. C. neutrons and electrons. D. electrons and photons.
Three masses are located as follows: a 3.5-kg mass is at the origin, a 4.2-kg mass at (0.0 m, 7.0 m), and a 6.5-kg mass at (24.0 m, 0.0 m). What is the gravitational energy of the system of masses? G = 6.67 x 10-11 N•m2/kg2
A) -2.8 × 10-10 J B) -2.0 × 10-10 J C) -1.4 × 10-10 J D) -3.2 × 10-10 J E) -3.9 × 10-10 J
The gibbous Moon is never visible in the daytime sky
a. True b. False Indicate whether the statement is true or false
The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
a.
its speed is constant.
b.
its speed is increasing.
c.
its speed is decreasing.
d.
its speed is a maximum.
e.
its speed is a minimum.