The lens in the eyepiece of a telescope magnifies light by bending it. what is this bending called?
your average speed is:
(the distance you fly, in any convenient unit of length)
the unit of your average speed is:
(the same convenient unit of length) per hour.
the answer is b. the solid with lower volume will have a higher density.
the way i usually think about this is by using cubes filled with cotton. you have a large rectangle and a small cube, each filled with the same amount. the cube is going to be denser because it is smaller and the cotton is more compressed to be able to fit into it. while the rectangle gives the cotton a lot of space to move freely around. mind you, they still have the same amount of cotton, but the cube is filled with more dense cotton because it is smaller.
another more common example is the trick question, "which is heavier, one pound of rocks, or one pound of feathers" they are the same weight, but one is more dense than the other.