Match each simple machine with its description.
wedge
reduces the amount of friction when
an object is being moved
lever
can split apart an object
wheel and axle
uses a rope: can change the direction
of a force
inclined plane
similar to a seesaw can lift an object
pulley
is a ramp

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy