In the united states, most of our energy comes from this non–renewable resource, which has a negative effect on the environment. coal nuclear natural gas petroleum #ned answer asap!

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid