An example of a grad-school level question?
The comet Shoemaker-Levy struck the planet Jupiter in July of 1994. The process of a comet striking a planet is an example of a net decrease in kinetic energy. Kinetic energy was ultimately converted into

An example of a grad-school level question?
A car skids along the road and smoke appears to be coming from under the tires. The heat that produces the smoke is caused by

An example of a grad-school level question?
In New York State, an observer will usually see the Sun rise in the

An example of a grad-school level question?
A strawberry farmer finds that, after a hard freeze, some of his strawberries are still alive. Which best explains why these strawberries were able to survive?