To calculate the density of a substance, what 2 properties do you need to know?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)