A boy is pushing a 136-kg crate on a 34 degree ramp, how much force must he apply to keep it from sliding downhill and to keep it stationery?

An increase in the greenhouse effect causes an increase in

In a rainstorm with a strong wind, what determines the best position in which to hold an umbrella?

How many teeth does an average human have

Which "spheres" are interacting when water evaporates from plants

A 1130-kg car is held in place by a light cable on a smooth (frictionless) ramp. The cable makes an angle of 31.0° above the surface of the ramp, and the ramp itself rises at 25.0° above the horizontal. Determine the tension in the cable?

Select all the correct answers. A free-falling golf ball strikes the ground and exerts a force on it. Which sentences are true about this situation? - A golf ball striking the ground is a collision.

The spreading of sound waves around openings in barriers is called

An object has a mass of 8.00 kg what is the gravitational force on the object on earth

Which of the following scientists studied physics in Egypt?

What is the Doppler effect?