A hot air ballon was a mass of 400 kilograms moves across the sky with 3200 joules of kinetic energy. the velocity of the balloon is

Summarize how the force of gravity factors into at least three processes in the formation of stars.

Which statement describes why ocean currents are considered convection currents? A) Warm water moves counterclockwise in the northern hemisphere B) Warm water rises and cold water moves in to replace it.

When the mass of one object doubles what happens to its gravitational attraction to another object of constant mass, assuming the distance between the two objects remains constant?

The moon formed after a planet-sized object collided with the sun.

If a toaster produces 8 ohms of resistance in a 120 v circuit, what is the amount of current in the circuit

What two factors determine how fast weathering occurs

A sound that's produced by a single wave at a constant frequency and with no overtones is called

Which of the following is ignored when determining the relative mass of atoms? protons nucleus electrons. neutrons

Gamma radiation can be significantly reduced by ... A sheet of paper Air A 3 mm thickness of aluminium Several cm of lead

Why is it possible to remove a paper without moving the object on it. (apply newton's law)