NEED HELP ASAP! DUE NOW!! The formula for this type of energy is PE = mass x Height
A 1 kg rock is sitting at a height of 100 meters.
What is its potential energy?
PE = 1 x 100. PE = 100 Use the same formula to calculate the potential energy of the same rock at each of the following heights and put the answers in the chart.

Height (m) Potential Energy (J)

0
1
20
50
100

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.