What has more momentum: a sports car moving at 100 mph or a train that is not moving?

An object falling under the influence of gravity and no other force is said to be in free fall. O A. True O B. False

When scientists identify the age of a fossil they a. place it in a time period b. cut it up. c. decide if it's valuable. d. decide what continent it belongs on.

What are convection currents and what causes them?

Charged low pressure refrigeration machines may be most efficiently leak checked by

How are power ratings used to describe machines?

Why is flammability a chemical property?

Luke pulls a sled using a force of 65 N for a distance of 25 m across level ground. The rope Luke pulls forms an angle of 25° with the ground. About how much work does Luke do on the sled? 250 J 690 J 1,500 J 1,600 J

Intramolecular and intermolecular forces hold together which of the following? A. atoms within a molecule B. molecules within an object C. charged particles within a salt crystal D. the atoms within compounds E. all of the above

Why is it that a football does not stay in motion at a constant speed when thrown, as the First Law of Motion suggests that it would? 1) Air resistance and acceleration 2) Gravity and mass 3) Distance, mass and gravity 4) Air resistance and gravity

A student pulls a box across a horizontal floor at a constant speed of 4.0 meters per second by exerting a constant horizontal force of 45 newtons. approximately how much work does the student do against friction in moving the box 5.