The electrical resistance of the wire is proportional to its length L and inversely proportional to the square of its diameter,

.
The length of the wire in the problem is changed from 200 inches to 500 inches, so the new length is 2.5 times the initial length:

the diameter of the wire is not changed, so the new electrical resistance must be 2.5 times the original value:
Well, first of all, if the ramps are perfectly frictionless, then the ball
won't roll ... it'll slide. Kind of like a bowling ball does at the beginning
of a shiny, highly-waxed lane. You need friction against the ball to roll it.
But in any case, no matter what the slopes of the ramps are, even
if they have different slopes, the ball will rise on the second ramp
to the same height from which it was released on the first ramp.
The answer would be C since metals have electrons that help in heating up the metal
I think its a higher frequency
The centripetal acceleration of the car is 48,800 mi/h2