Describe the two hypotheses as to the origin or reason for the sun’s motion relative to the stars of the zodiac, first the self-centered view then the more modern less self- centered hypothesis.

The slope of a velocity time graph over any interval of time gives the during that interval

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?