A hair dryer draws 14.5A when plugged into a 120-V line. Assume direct current.

A) What is its resistance?

for this i got 8.3 (ohm)

but i dont know what to do with the second part of the question
B) How much charge passes through it in 15min ?

Question

A hair dryer draws 14.5A when plugged into a 120-V line. Assume direct current.

A) What is its resistance?

for this i got 8.3 (ohm) 

but i dont know what to do with the second part of the question
B) How much charge passes through it in 15min ?

anonymous · Answer

for Part a i did R = V/ A

hartnn · Answer

Charge = current * time

part a is correct :)

anonymous · Answer

I dont understand which formula to use for part b.

hartnn · Answer

i gave you the formula only

Charge = current * time

current = 14.5
time = 15 min

hartnn · Answer

if needed convert time into seconds
time = 15 min = 15*60 sec = ....sec

anonymous · Answer

oh that is all, I didnt even find that in the book thank you very much

hartnn · Answer

your most welcome ^_^

anonymous · Answer

I got an answer of 13050

hartnn · Answer

charge = 13050 Ampere-sec
don't forget the units :)

anonymous · Answer

so it  would be A/s ..your the best thank you!

hartnn · Answer

not A/s its A-s

A (ampere ) and s (seconds) are multiplied, not divided

hartnn · Answer

because charge is current(in amperes) multiplied by time(in seconds)

anonymous · Answer

A*s right, lemme try it aha thank you!

anonymous · Answer

it worked thank you!

hartnn · Answer

:D