Name three methods that can be used to change the overall density of an object.

Where does the force for earthquakes came from?

Examples were friction is not useful

Two skaters collide and grab on to each other on frictionless ice. One of them, of mass 77.0 kg, is moving to the right at 4.00 m/s, while the other, of mass 66.0 kg, is moving to the left at 2.50 m/s.

Three particles are moving perpendicular to a uniform magnetic field and travel on circular paths (see the drawing). They have the same mass and speed. List the particles in order of their charge magnitude, largest to smallest.

Describe the movement of heat energy by the process of convection

We use electrical devices leopard deuce motion, light, and sound. Which aspect of energy explains why these devices are possible?

In which circumstance is displacement the same as distance traveled

Identify the conditions for an elastic collision in a closed system. CHECK ALL THAT APPLY

A certain radioactive substance has a half life of one hour. if you start with 1g of the material at noon how much will be left at 3:00 PM?

For each of the following news stories, determine whether the objects speed or velocity is given: the world record for the hundred-meters dash is about 10m/s; the wind today is 30 km/h from the north-west;