Inside the nucleus, the weakest of the four fundamental forces is
A) the electromagnetic force. B) the gravitational force.
C) the weak nuclear force. D) the strong nuclear force.
B
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Mercury and the Moon appear similar, but we note that:
A) the lunar mare are darker than Mercury's intercrater plains. B) Mercury has "weird terrain" opposite its huge Caloris Basin. C) Mercury has striking lobate scarps due to the shrinking of its core. D) Mercury does not always keep the same face toward the Sun, while the Moon does have the Earthside always facing us. E) All of the above are correct.
A 4.0-pC point charge is placed at the center of a hollow (inner radius = 2.0 cm, outer radius = 4.0 cm) conducting sphere which has a net charge of 4.0 pC. Determine the magnitude of the electric field at a point which is 6.0 cm from the point charge.
A. 35 N/C B. 25 N/C C. 30 N/C D. 20 N/C E. 10 N/C
Simple Pendulum: A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T. How does the period of the pendulum change when the elevator moves downward with constant acceleration?
A. The period does not change. B. The period increases. C. The period decreases. D. The period becomes zero. E. The period increases if the upward acceleration is more than g/2 but decreases if the upward acceleration is less than g/2.
As the moon covers the solar disk during a solar eclipse, a flash spectrum of the sun's chromosphere can be recorded. This flash spectrum reveals an emission spectrum and provides information on the properties of the chromosphere. As the moon moves from the inner chromosphere to the outer chromosphere, the spectral lines present in the flash spectrum change. What is going on in the chromosphere
that produces the changes in the flash spectrum? I. The temperature of the chromosphere decreases as the distance from the photosphere increases. II. The temperature of the chromosphere increases as the distance from the photosphere increases. III. The density of the chromosphere decreases as the distance from the photosphere increases. IV. The density of the chromosphere increases as the distance from the photosphere increases. a. I & III b. I & IV c. II & III d. II & IV e. I