A 6.2 kg cannonball is fires from a 280 kg cannon. The cannon recoils with a velocity of 4.9 m/s. What is the velocity of the cannonball when it leaves the cannon?

The atomic mass of an element is equal to the number of: A: protons B: protons plus neutrons C: protons plus electrons D: neutrons

A 4 kg object possesses 18 J of kinetic energy. What is its velocity?

When you hold a piece of chocolate in ypur hand, why does the chocolate melt?

Because you may come in contact with organisms you cannot see, what safety procedure MUST be followed? a. Read over your activity. b. Open the windows of the laboratory. c. Wash your hands thoroughly after completing the activity. d.

How is thermal energy transferred between two objects that are at different temperatures?

A set of data is collected from a simple circuit with a 20 resistor and is represented in the table

A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v. Assume that the magnitude of the acceleration due to gravity is g. a.

8. What happens to force when mass is increased?

Give an example of ionic and covalent bond, and explain and make an example for each.

Which of these is the best reason for proper nutrition? A. To ensure that you will be skinny B. To protect yourself against certain diseases C. To improve your intelligence D. To ensure that you will get good grades