2. A measuring cylinder has a mass of 120g when empty.
When it contains 50cm of a liquid, the total mass of the measuring cylinder and the liquid is
What is the density of the liquid?
A
glom
B
50
de
g/cm
C
120
50
giem
D
160
50
g/cm

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2