How does a concave mirror form an image?

it bends the light toward a focal point.
it bends the light away from a focal point.
it bounces the light toward a focal point.
it bounces the light away from a focal point.

c

Describe uniform velocity and variable velocity in short

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in