I posted this before and no one could read it. we need help with #2 on the first

Question

I posted this before and no one could read it. we need help with #2 on the first and #3 and #5 on the second picture.

to the right, and five moving to the left, four electrons are passing 2. As part of a high electrons are passing to the left. What is the effective current, in Amperes? point in a energy physics experiment, a number of electrons and protons pass a certain The pipeline each second. (All of the charged particles are moving in the same direction.) detector records a current of 5.00 nA. If there afe 4 x 10 protons, then how many electrons? 3. A solenoid is created by winding a long copper wire around a hollow cylinder. [For a solenoid, the wire does not have to be copper and the cylinder does not have to hollow, but they are for this problem.] Using a vernier calinpr ithaj hrnn d

Explanation / Answer

2)

let the current is I

I = 5 nA

let the number of electrons is ne

Now, I = (-ne + np) * e

5 *10^-9 = 1.602 *10^-19 * (4 *10^10 - ne)

solving for ne

ne = 8.79 *10^9

the number of electrons passing is 8.79 *10^9

please post rest in a seperate post

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