When an ice pack is applied to an injury, thermal energy from the injured area transfers to the ice, causing the blood vessels within the area to constrict, which reduces the swelling. how is thermal energy transferred in this scenario?
1.) conduction
2.) convection
3.) radiation

Energy is the ability to do work which measures what

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

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