Answer:
Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work).
Explanation:
It is a measure of how well a machine reduces friction.
Latitude, elevation, ocean currents, topography, and prevailing winds. There's probably a few others but these are the most important.
Answer:
I think the Bulb No. 2 will stop emitting light if the bulb No. 1 burns out.
Answer:
d = 11.1 m
Explanation:
Since the inclined plane is frictionless, this is just a simple application of the conservation law of energy:

Let d be the displacement along the inclined plane. Note that the height h in terms of d and the angle is as follows:

Plugging this into the energy conservation equation and cancelling m, we get

Solving for d,

Answer:
magnitude of the velocity
Explanation: