An object of mass m is suspended by two coplanar wires, as shown below. The tension in each wire has a magnitude given by
A.
.B.
.C.
.D.
E.
.Answer: D
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An ideal gas is allowed to undergo a free expansion. If its initial volume is V1 and its final volume is V2, the change in entropy is
A. nR ln (V2/V1) B. nRT ln (V2/V1) C. nk ln (V2/V1) D. 0 E. nR V2/V1
In the context of general relativity, time slows down in curved space-time. This is referred to as _____
A) spatial loss B) spatial growth C) time dilation D) time fragmentation
When an earthquake occurs, the location on Earth's surface above the point of initial energy release is called the earthquake's
a. fault line. b. focus. c. epicenter. d. none of the above.
Velocity: A bat, flying toward the east at 2.0 m/s, emits a shriek that is reflected back to it from a wall that is 20.0 m in front of the bat at the instant the shriek is emitted. Sound travels at 340 m/s in the air. How many milliseconds after emitting the shriek does the bat hear the reflected echo from the wall?
Fill in the blank(s) with the appropriate word(s).