A train pulling out of Westmount accelerates from rest at a constant rate. It covers 800 meters in 10 seconds. What is its rate of acceleration?

Which two particles are found in the center of an atom

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

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