Momentum: Calculate the speed at which a 0.723-kg object has the same momentum as a 1.30-kg object that is moving 0.515c.
A. 0.734c
B. 0.712c
C. 0.981c
D. 0.592c
Answer: A
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If C = 10 ?F, what is the equivalent capacitance for the combination shown?
A. 7.5 ?F B. 6.5 ?F C. 7.0 ?F D. 5.8 ?F E. 13 ?F
How was the value of G first determined?
a. by Cavendish, using a torsion balance b. by Eötvös, using a torsion balance c. via a gedanken experiment d. by Newton, watching an apple fall e. none of the above
A light bulb has resistance of 175 ? when operating at 100 V. Find the current in the light bulb
a. 1.8 A b. 0.33 A c. 0.57 A d. 0.76 A e. 1.3 A
Poke a pinhole in a piece of card and hold it in sunlight and an image of the Sun is cast on the floor. The Sun-image diameter depends on the height of the pinhole above the floor
Measurements for all heights show the Sun-image diameter is about 1/100 the distance between the pinhole and the floor. This means that A) about 100 end-to-end Sun images would fit between the pinhole and the floor. B) distance-wise, the Sun is about 100 Suns away from Earth. C) both of these D) none of the above