# SAT PHYSICS 2 mcq help

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1. Jan 22, 2016

### **Mariam**

1. The problem statement, all variables and given/known data
1)a student decides to investigate the electric shock she received when she gets out of her car. Which of the following factors least likely to have a significant effect on the size of the shock?
A. The material of her clothe
B. The distance she slides across the seat when getting out
C. The part of the car she touches when she gets out
D. The humidity of the air
E. Whether or not the engine is running

2) which has the least rest mass?
Electron
Photon
Quark
Proton
Neutron

2. Relevant equations
I don't really understand the questions, but probably no equations needed cause it's only concepts
Maybe for second question, Erest=mc^2
3. The attempt at a solution
As I mentioned, I have no clue

2. Jan 22, 2016

### Staff: Mentor

What causes the shock?

3. Jan 22, 2016

### **Mariam**

Maybe the fact that the car is a conductor , so inside conductor there is no charge but on the surface there is?

4. Jan 22, 2016

### Staff: Mentor

No, don't over-think this problem. You can get that kind of shock pretty much anywhere. Like when you pull on a wool pull-over sweater and touch a door knob. What kind of shock is that? What causes it? You can read about it at wikipedia, and I bet you'll be able to answer the question then.

5. Jan 22, 2016

### **Mariam**

Ok, it's static electricity that builds up on your body from car seat.

So A and B are ruled out.
I also think whether can affect the charge, cause if more water /humidity means less electric shock.

Is it correct until now?

6. Jan 22, 2016

### Staff: Mentor

Yes, good!

7. Jan 22, 2016

### **Mariam**

I think it's E then

8. Jan 23, 2016

Looks right.