A2 kg cart going 1 m/s to the right crashes into a 2 kg cart going 1 m/s in the opposite direction (to the left). What is the total momentum of the system before and after the colision?
Okg m/s
4 kg m/s
4J
2 kg m/s

If the moon has a diameter of 2,159.14 miles, what is the maximum distance that it could be observed by the naked eye with enough detail that you could distinguish it from other celestial bodies (assuming that you have 20/20 vision)

Which term best describes the phrase “something that happens”?

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?