If the mass of the earth and all objects on it were suddenly doubled, but the size remained the same, the acceleration due to gravity at the surface would become
A) 4 times what it now is.
B) 1/4 of what it now is.
C) 2 times what it now is.
D) the same as it now is.
E) 1/2 of what it now is.
C
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Three balls of equal mass start from rest and roll down different ramps. All ramps have the same height. but different steepness. Which ball has the greater speed at the bottom of its ramp?
a. The ball from steepest ramp b. The ball from the least steep ramp c. They will all have the same speed since the ramps are all the same height
After tying a string to a rock, you twirl the rock around above your head. If the string were to break, what path would the rock follow?
A. The rock will fall down immediately. B. The rock will go in a straight line before falling down. C. The rock will fly upward. D. The rock will complete the circle before falling down.
An asteroid revolves around the Sun with a perihelion 0.5 AU and an aphelion of 7.5 AU. What is its period of revolution?
a. 4 years b. 8 years c. 16 years d. 32 years e. 64 years
What is the mass of 2 moles of carbon dioxide?
a. 88 g b. 80 g c. 64 g d. 56 g