If you pitch a baseball with twice the kinetic energy you gave it in a previous pitch, the magnitude of its momentum is
A) 4 times as much.
B) 2 times as much.
C) doubled.
D) times as much.
E) the same.
D
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We can essentially rule out the Sun as a cause of global warming over the past few decades because
A) the amount of incoming sunlight has decreased while Earth's average temperature has increased. B) the amount of light coming from the Sun does not change over time scales of decades. C) there is no evidence that the Sun can affect climate. D) the number of sunspots on the Sun varies in an approximately 11-year cycle.
Which of the following correctly lists the various parts of the electromagnetic spectrum in the correct order from lowest to highest energy.
A. infrared, ultraviolet, radio waves, gamma rays, visible B. gamma rays, infrared, ultraviolet, radio waves, visible C. radio waves, ultraviolet, visible, infrared, gamma rays D. gamma rays, ultraviolet, visible, infrared, radio waves E. radio waves, infrared, visible, ultraviolet, gamma rays
How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red when an electric current is in it?
A) 1 B) 2 C) 3 D) 4 E) none of the above
A slit of width 2.0 ?m is used in a single slit experiment with light of wavelength 650 nm. If the intensity at the central maximum is Io, what is the intensity 10° from the center?
A) 0.53 Io B) 0.03 Io C) 0.43 Io D) 0.50 Io E) 0.35 Io