The constant G that appears in the equation F = Gm1m2/r2 is
a. smaller on the Moon than on Earth.
b. the force of gravity.
c. equal to g.
d. the acceleration due to gravity.
e. a universal constant.
e
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The nucleus that has the least mass per nucleon is
A) hydrogen. B) iron. C) lead. D) uranium. E) plutonium.
An object at 30.0°C has its temperature increased to 41.0°C. The power then radiated by this object increases by how many percent?
a. 10.0 b. 15.3 c. 3.63 d. 36.7 e. 96.5
A playground merry-go-round with a radius of 1.8 m and a rotational inertia of 120 kg m2 is stationary
A child with a mass of 25 kg gets on and walks around the edge of the merry-go-round. How many revolutions around the merry-go-round must the child make in order for the merry-go-round to make one full revolution? A) 2.5 revolutions B) 1.5 revolutions C) 3.0 revolutions D) 1.0 revolutions E) 2.0 revolutions
Which of the following types of protogalactic clouds is most likely to form an elliptical galaxy?
A) a low-density cloud with quite a bit of angular momentum B) a dense cloud with quite a bit of angular momentum C) a very low-density cloud with very little angular momentum D) a very massive cloud with any density and a lot of angular momentum E) a dense cloud with very little angular momentum