States that momentum cannot be created or destroyed

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

What is the temperature in degrees celsius of a substance with a tempature of 49k

The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g