Which of the following is an elastic collision?

A vase falling to the floor and shattering

B. Two cars colliding and sticking together

C. A wad of gum sticking to a window

D. A tennis racquet hitting a ball

When an object stops moving, changes speed, or changes direction, how does a scientists describe that condition? A. Unbalanced forces B. Frictional force C. A balanced set of forces D. stable factors

3730 watts equals about how many horsepower A. 5 B. 10 C. 20 D. 30

Because of the high heat and low humidity in the summer in death valley, california, a visitor requires about one quart of water for every two miles traveled on foot. calculate the approximate number of liters required for a person to walk 10.

A high-speed train travels 480 km from Paris to Grenoble, France, at an average speed of 180 km/h. How long will it take to reach Grenoble? A. 0.66 h B. 3.8 h C. 0.38 h D. 2.7 h

What is mantle convection? A. cool matter rises and heats up and then falls and cools again and again, sometimes it will be erupted out of volcanoes B.

Which of the following is the most accurate statement concerning the properties of matter? a. they can be written as symbols b. they can be observed and measured c. they cannot be tested or verified d. they change with the amount of matter present

Danilo is sliding down a slide. What forces are acting on him as he slides

If you want your investment or savings account to be easily turned into cash without losing its value, you should consider the?

What is the definition of "gravitational potential energy"?

A number of food chains linked together