In machines and engines, A. there will be no friction. B. friction increases fuel efficiency. C. the process of overcoming friction uses valuable fuels.

Suppose you are walking in an airliner in flight

What do scalars measure force acceleration magnitude velocity

All of the following are physical properties of chlorine except it

1. Calculate the speed for a car that went a distance of 125 kilometers in 2 hours time.

Which best describes what happens to sunlight after passing through the keyhole of a door

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?

The period T of a simple pendulum depends on the length L of the pendulum and the acceleration of gravity g (dimensions L/T^2). (a) Find a simple combination of L and g that has the dimensions of time.

What is an example of the theory that the best adapted organisms for an environment are the ones most likely to survive

What does not affect the apparent brightness of a star?