Melting point, hardness, and density are all examples of (physical/chemical) properties.

The substances that are necessary for producing of certain hormones and that store and transport vitamins

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.

The energy equivalent of the rest mass of an electron is