we drink. We breathe out carbine dioxide. We use salt in our foods. What do these substance have in common

Mike walks 100 meter north, then walks 30 meters south. after this, he walks another 10 meters north. what is the magnitude of his total displacement during this walk, in meters?

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.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created