The muscular system brings what to the body?

If a balloon is taken outside on a very cold day, what will occur?

While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you

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