Two students are running in a race. Student 1 has more kinetic energy than student 2. Who will win the race?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.