A shopping cart (initially at rest) with a mass of 45.0kg is released at a height of 4.2m at the top of the store’s entrance ramp. What is the cart’s velocity at the bottom of the ramp?

Ways that industry and agriculture use physical properties to separate substances

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.

Mixing salt in water is an example of physical change