What are the characteristics of an index fossil?

a. limited to a short span of geologic time but widely distributed

b. geographically limited

c. found only in shale

d. preserved as a mold

e. large enough to see without a hand lens

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.

Two point charges, separated by 1.5cm, have charge values of +2.0 and-4.0 uc, respectively. what is the value of the mutual force between them