A greyhound's velocity changes from 10 meters per second to 15 meters per second in 0.5 second. What is the greyhound's average acceleration?

Which type of heat transfer can happen through empty space? which type of heat transfer can happen through empty space? radiation conduction convection evaporation?

Which solid-state component can be used as a switch to turn current on or off?

How does the magnetic field at a pole differ from the magnetic field in the middle of a magnet?

A 398-kg boat is sailing 14.0° north of east at a speed of 1.50 m/s. 23.0 s later, it is sailing 33.0° north of east at a speed of 4.40 m/s. During this time, three forces act on the boat: a 32.8-N force directed 14.

Match the type of metamorphism to its best definition. Impact metamorphism ? The process in which a rock changes as a result of heat generated from magma. Dynamic metamorphism ? The process in which a rock changes due to pressure directed on it.

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova

When a car turns a corner on a level road, which force provides the necessary centripetal acceleration? 1) gravity 2) normal force 3) air resistance 4) tension 5) friction

Use Newton's universal law of gravitation to explain why gravity is greater on Earth than on Mercury.

What is a magnetic field and how does it interact with magnetic materials?