Which characteristics are used to classify stars on the Hertzsprung-Russell diagram? Check all that apply.

size
density
composition
temperature
absolute brightness

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.