A mouse ran 100 centimeters in 20 seconds. What was his speed?
A. 5 cm/s
B. 0.2 m/s
C. 2000 m/s
D. 120 m/s

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy

Which best represents the law of conservation of mass ?

Select the correct answer. what does the process of natural selection involve?