What is most likely the color of the light whose second-order bright band forms an angle of 13.5° if the diffraction grating has 175 lines per mm?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

What happens to atoms and chemical bonds during a reaction?

Explain what makes a passenger in a turning car slide toward the door. critical thinking