Which machine would be an alternative to lifting a crate with a pulley?

a. doorstop

b. ramp

c. ax

d. screw

Scientist who discovered that arms contain an electric charge

A teacher at my school: Mr. Zerr is on the moon and he has a certain mass. Will his mass change when he comes to Earth?

I need the answer for density

The first model of an atom was a simple, neutral sphere. explain why J. J Thomson had to come up with a new model of the atom when he discovered the electron?

An element whose physical properties are generally opposite of metals

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

Unless otherwise posted, what is the speed limit in a school zone? florida

If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position? when released, what will be it's kinetic energy if it flies past it's starting position?