Which is not a step in the scientific method? a. Problem or question. b. Research. c. Ask other people for their opinion. d. Arrive at a conclusion.

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?

Coal contains energy. a. light b. kinetic c. chemical d. mechanical