In the classroom demonstration shown above, a rubber ball is dropped from position 1. the ball bounces as shown.
a. what is the source of the potential energy in this experiment?
b. in which position does the ball have the least potential energy but the most kinetic energy?
c. does the ball have more potential energy in position 2 or 4? explain your answer.

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?

The term equestrian relates to which animal? bulls cows horses pigs