Planet Z-34 has a mass equal to one-third that of Earth and a radius equal to one-third that of Earth. With g representing, as usual, the acceleration due to gravity at the surface of Earth, the acceleration due to gravity at the surface of Z-34 is
A) g/3.
B) 3g.
C) 6g.
D) g/9.
E) 9g.
B
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Two identical masses are attached by a light string that passes over a small pulley, as shown in Figure 6-6. The table and the pulley are frictionless. The masses are moving
A. with an acceleration equal to g. B. with an acceleration less than g. C. with an acceleration greater than g. D. at constant speed. E. with an acceleration that cannot be determined without additional information.
All ________ planets have rings around their equators
Fill in the blank(s) with correct word
The magnitude of the electric field at a point P for a certain electromagnetic wave is 570 N/C. What is the magnitude of the magnetic field for that wave at P? (c = 3.0 x 108 m/s)
A) 2.91 µT B) 1.90 µT C) 1.10 µT D) 1.41 µT E) 2.41 µT
As rising air cools,
A) water vapor content decreases. B) relative humidity decreases. C) the moist adiabatic lapse rate increases. D) relative humidity increases.