Select the correct answer. We use electrical devices that produce motion, light, and sound. Which aspect of energy explains why these devices are possible?
A. Energy can't be created.
B. Energy can change from one form to another.
C. Energy isn't made of matter.
D. Energy can't be destroyed.

A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Where do magnetic lines of force enter earth?