A 5.0-kg object is suspended by a string from the ceiling of an elevator that is accelerating downward at a rate of 2.6 m/s2 . What is the tension in the string?
a. 49 N
b. 36 N
c. 62 N
d. 13 N
e. 52 N
b
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What is the equivalent resistance between points A and B in the figure when R = 10 ??
A. 20 ? B. 10 ? C. 25 ? D. 15 ? E. 3.2 ?
When light from the air enters a raindrop, the light
A) slows down. B) remains at speed c. C) speeds up. D) none of the above
The stainless steel 17-7PH is precipitation hardened with the intermetallic compound _________.
Fill in the blank(s) with the appropriate word(s).
Kepler's second law tells us that planets sweep out equal areas in equal times. If you compare the amount of area per time swept by Earth with the one of Jupiter, you would conclude:
A) They sweep the same area per time. B) They sweep different areas per time. C) Jupiter sweeps a larger area per time because it has much more mass than Earth. D) Earth sweeps a larger area per time because it has much less mass than Jupiter.