What is the ratio of the light-gathering power of a 10-m telescope to that of a 1-m telescope?
a. 10 to 1
b. 1 to 10
c. 100 to 1
d. 1 to 100
e. 3.2 to 1
c
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A hydraulic press multiplies a force by 100, which is done at the expense of
A) energy, which is divided by 100. B) the distance through which the force acts. C) the time through which the force acts. D) the mechanism providing the force. E) none of the above
A child is riding a merry-go-round that has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of 0.745 rad/s2. The child is standing 4.65 m from the center of the merry-go-round
What is the magnitude of the linear acceleration of the child? A) 8.05 m/s2 B) 7.27 m/s2 C) 2.58 m/s2 D) 3.46 m/s2 E) 4.10 m/s2
Consider the following three items
A. 100 g of steam on the Moon B. 10 g of water on the Earth C. 20 g of ice floating in water on the Earth Put these items in order of increasing mass:
1.A < B < C 2.A < C < B 3.B < A < C 4.B < C < A 5.C < A < B 6.C < B < A 7.None of the above 8.Impossible to determineWhich of the following is the smallest dwarf planet?
a. Ceres b. Mercury c. Pluto d. Eris