From Earth, due to their motions and the fact that the Sun lights only a portion of each surface, both Mercury and the Moon:
A) always look full from Earth.
B) appear to go through phases.
C) pass through Earth's shadow.
D) appear to be half-lit by the Sun.
E) always have the same side facing Earth.
B
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A force is non-conservative if the net work done by the force on an object moving around any closed path is zero
Indicate whether the statement is true or false
Capacitor #1 has parallel plates of length L and width W, plate separation d, and is filled with dielectric with constant K.Capacitor #2 has parallel plates of length 2L and width 2W, plate separation 2d, and is filled with dielectric with constant 2k. If a voltage V is applied to capacitor #1 and a voltage 2V is applied to capacitor #2, which capacitor stores more energy and by what factor?
a. Capacitor #2 by a factor of 8 b. Capacitor #2 by a factor of 16 c. Capacitor #1 by a factor of 4 d. Both capacitors store the same energy.
The back of a person's eye is too close to the lens. This person is suffering from
A) nearsightedness. B) spherical aberration. C) astigmatism. D) chromatic aberration. E) farsightedness.
The distances to other stars are best measured in ________
Fill in the blank(s) with correct word