Water flows over a flat plate so that at the downstream end it has the velocity profile shown. The average velocity v across the upper horizontal surface is nearest:
(A) 0.043 m/s
(B) 0.067 m/s
(C) 0.082 m/s
(D) 0.097 m/s
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Suppose it is full moon. What phase of Earth would someone on the Moon see at this time?
A) full Earth B) new Earth C) first-quarter Earth D) Earth does not go through phases as seen from the Moon.
The principle of equivalence states that
A) the laws of physics are the same in all inertial frames of reference. B) the speed of light is the same in any frame of reference. C) clocks that move relative to one another keep time at different rates. D) the length of an object depends on its speed relative to a given observer. E) all physical experiments conducted in a uniform gravitational field and in an accelerated frame of reference give identical results.
A block of mass m sits at rest on a rough inclined ramp that makes an angle ? with the horizontal. What must be true about force of static friction f on the block?
A) f = mg sin ? B) f = mg cos ? C) f > mg D) f > mg cos ? E) f > mg sin ?
When an unstable Cd nucleus undergoes gamma decay, the nucleus formed is that of
a. Cadmium. b. Tin. c. Silver. d. Palladium. e. Indium.