Aroller coaster car rapidly picks up speed as it rolls down the slope. as it starts down the slope, its speed is 4 m/s. but three seconds later, at the bottom of the slope, its speed is 22 m/s what is the average acceleration?

Why don't you see your reflection in water with waves or repples

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Explain what will happen if decomposers were apsent from a forest ecoysystem.