A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance. If the 10-kg rock falls with acceleration a, what is the acceleration of the 20-kg rock?
A) 4a B) a/2 C) a/4 D) 2a E) a
Question 2
Suppose you are on the moon and you drop a rock and a feather at the same time. You will find that
A) the two fall at the same speed, but this speed is slower than a rock would fall on Earth.
B) the rock falls faster than the feather, although both of them fall slower than they would on Earth.
C) the rock falls faster than the feather, and both speeds are the same as they would be on Earth.
D) the two fall at the same speed, and this speed is the same as the speed of a rock falling on Earth.
E) they don't fall--they remain suspended above the surface of the moon.
Eating is a nutritional as well as a social time
Rock and Plastic
Time
Some clues about the importance of language experience come from the tragic case of Genie, a girl ...
Sterilization Time Requirements
Disitive Time For Meat