in order for combustion to occur what needs to happen

Can a black light be used to charge a solar powered product

When is an object accelerating?

An old lady uses a walker and is able to cross the street. is this inertia?

A collision in which some kinetic energy is lost is a (n) collision. A collision in which the objects become one and move together is a (n) inelastic collision.

Compare the momentum of a 6,300-kg elephant walking 0.11 m/s and a 50-kg dolphin swimming 10.4 m/s. your answer

The element that is most abundant in earth is

What is true about coal as an energy source

A car is moving with a speed of 22 m/s. The driver then brakes, and the car comes to a halt after 6.5 s. What is the distance covered by the car after the driver brakes, until it comes to a stop? A) 36 m B) 72 m C) 140 m D) 210 m

Which of the following best explains why an explosive charge in a cannon can cause a cannonball to fly out of the cannon with a high velocity? A. because chemical potential energy can convert to gravitational potential energy B.

Distance divided by time what is velocity