3. If the potential difference is 120 volts and the resistance is 60 ohms, what is the current?

2 amperes

Explanation:

According to Ohms law

v = ir

v = voltage

I = current

r = resistance

From the question

v = 120volts

r = 60 ohms

I = ?

Using ohms law ,

v = ir

120 = I x 60

Divide both sides by 60

120/60 = I x 60/60

2 = I

I = 2 amperes

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures