The neighborhood joker comes up to you and is really on a roll this morning. After several “good ones” they then say “OK so you’re taking physics, right? Here’s one – if the acceleration of gravity is 9.8 m/s2 then why isn’t everything accelerating? HAHAHA”. Being a dedicated student you give this question some real thought and come up with a reasonable response. You might say:

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?

Arock displaces 1.65 l of water. the volume of the rock is: a: 1,650 cm³ b: 165.0 cm³ c: 16.50 cm³ d: 0.165 cm³

Two lasers are shining on a double slit, with slit separation d. laser 1 has a wavelength of d/20, whereas laser 2 has a wavelength of d/15. the lasers produce separate interference patterns on a screen a distance 5.30 m away from the slits. part a which laser has its first maximum closer to the central maximum? view available hint(s) which laser has its first maximum closer to the central maximum? laser 1 laser 2