I actually know the answer to this one, you use pennies to find the atomic weight of a penny, it really doesn't have a weight. LOL
You're going to use the constant acceleration motion equation for velocity and displacement:
(V)final²=(V)initial²+2a(Δx)
Given:
a=0.500m/s²
Δx=4.75m
(V)intial=0m
(V)final= UNKNOWN
(V)final= 2.179m/s
Answer:0.147 N-m
Explanation:
Given
Diameter of Pulley 
radius 
mass of first object 
mass of second object 
Now both masses will exert a torque a on Pulley
Torque due to first Pulley 
Torque due to second mass on Pulley 
Total Torque by masses 
so we need to apply a torque of magnitude 0.147 N-m opposite to the direction of 
Question:
When salt dissolves in water, what type of change occurs?
Answer:
A physical change results in a change of the material's appearance, but no new chemical products result. So the answer would be A.
