A car moves at 45 kilometers per hour. Which option describes if the given value is speed or velocity?

1 velocity, because there is no specific direction
2 speed, because there is no specific direction
3 velocity, because there is a mention of time
4 speed, because there is a mention of time

How to tell if a molecule is polar or nonpolar with electronegativity

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.

Contains chemical energy. a. heat b. light c. natural gas