A lobster crawls onto a bathroom scale on the ocean floor. Its weight compared to its weight above the surface is
A) greater.
B) less.
C) the same.
Answer: B
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A person standing in the Moon's penumbra will see a
What will be an ideal response?
If a source of light is approaching us at 3,000 km/sec, then all its waves are:
A) blue shifted by 1%. B) redshifted by 1%. C) not affected, as c is constant regardless of the direction of motion. D) blue shifted out of the visible spectrum into the ultraviolet. E) redshifted out of the visible into the infrared.
A thin cylindrical shell is released from rest and rolls without slipping down an inclined plane that makes an angle of 30° with the horizontal. How long does it take it to travel 3.1 m?
A) 1.4 s B) 1.1 s C) 2.1 s D) 1.6 s E) 1.8 s
Between July 1969 and December 1972, 17 people reached the surface of the Moon
a. True b. False Indicate whether the statement is true or false