A rope can withstand a maximum tension of 1050 N. Suppose the coefficient of static friction between wood and concrete is u = 0.4. What is the most massive
wooden crate you could begin to move with this rope?

In a good thermo flask the main cause of heat loss is

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents