What are some machines or devices that depend on gravity to work?

What is usually the first step in amending the US Constitution

Electron guns are used in X-ray tubes. The electrons are accelerated through a relatively large voltage and directed onto a metal target, producing X-rays. (a) How many electrons per second strike the target if the current is 0.

Frank just graduated from eighth grade. Assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation

Which material would you take, steel or bricks/stone to design a bridge. Why? (Question related to poisson's ratio)

A green plant captures energy from the sun and creates glucose. What is the radiant energy from the sun being converted to?

What characteristic of a planet determines the acceleration due to gravity on it?

Which set of terms best defines what affects kinetic energy and potential energy, respectively? position, gravity gravity, position velocity, height height, velocity

You are operating a powerboat at night. You see green and white lights on another boat. What should you do?

How does Newton's second law apply to an "Egg Drop" experiment?

A 4.0-n puck is traveling at 3.0 m/s. it strikes an 8.0-n puck, which is stationary. the two pucks stick together. their common final speed is: