A 100 N tin box is prevented from falling by holding it on both sides. If the pushing forces are 400 N each, what is the coefficient of friction?

What will a positive and a negative charge do if they are separated from each other?

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?