In a wire with a 1.05 mm2 cross-sectional area, 7.93×1020 electrons flow past any point during 3.97 s. What is the current in the wire?

The current in the wire is 31.96 A.

Explanation:

The current in the wire can be calculated as follows:

Where:

q: is the electric charge transferred through the surface

t: is the time      

The charge, q, is:

Where:

n: is the number of electrons = 7.93x10²⁰

e: is the electron's charge = 1.6x10⁻¹⁹ C

Hence, the current in the wire is:

Therefore, the current in the wire is 31.96 A.

I hope it helps you!

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures