A jogger runs at an average speed of 5 m/s for 3 minutes, then finishes with an average speed of 4 m/s for 2 minutes. What is his average speed in m/s for the run?

How many protons are in the radioactive isotope 40/19K?

A force that tries to slow things are moving through air

Solar energy heats the surface of the earth including the ground rocks and even roadways as the temperatures of the surfaces increase heat energy is released back

A car travels 70 miles in 80 minutes. Which is its average speed per minute

During a baseball game l. A hitter strikes the ball with a bat. When this happens, the ball and the bat exert a firce on each othe. Why does the ball accelerate away from the vat more than accelerates away from the ball?

A 2.25-kg block is released from rest on a ramp of height h. when the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.

Which of the following are steps for balancing chemical equations? Check all that apply. ] A. Multiply the reactants to get the products. B. Change subscripts. O C.

1. Why does the water vapour in clouds condense? 2. Explain why you can see clouds but not see the water vapour in the air

What are some similarities between electricity and gravity?

What's the difference between solids and liquids?