Within an internal combustion engine, the can-shaped component that moves up and down the cylinder and is the main moving part in the engine is the
a. connecting rod.
b. piston.
c. spark plug.
d. crankshaft.

Apiano tuner uses a tuner to create a tone of 5.00 x 10² hz. when a key on the piano is struck he hears 5 beats per second. what is a possible frequency of vibration for the piano string? 2500 hz 1300 hz 605 hz 495 hz

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Which accurately compares concave and convex lenses?