Which is the best example of a cycle: a turn of a wheel or a slide down a ski slope?

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.

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.