Answer: <u>D. An AC circuit</u>
Explanation:
I took it on a test and it was correct ; )
Answer: 
Explanation:
IMA stands for Ideal Mechanical advantage.
The IMA of pulley system can be defined as the ratio of output force to input force.
From the given pulley system,
The input force = 
The output force = 
Hence, IMA of the given pulley system,

1. Proton
2. negative ion
3. electric charge
4. electron
5. repel
6. attract
7. positive ion
Answer: 88.2 J
Explanation: PE, OR Potential Energy, equals to mass gravity and height.
mass - 3kg
height - 3 because (8-5)
gravity is 9.8kg
so 3 times 3 times 9.8 = 88.2J