In a US household, the voltage in an electric outlet (in volts) is given by the following equation, where t is in seconds.
V = 156sin(120πt)
However, in a European house, the voltage is given (in the same units) by the following equation.
V = 339sin(100πt)
Answer the following questions comparing the voltages in the two regions.

(a) How much greater is the maximum voltage in a European house than a US house?
(b) What is the number of cycles (oscillations) per second in a US house?

Question

In a US household, the voltage in an electric outlet (in volts) is given by the following equation, where t is in seconds.
V = 156sin(120πt)
However, in a European house, the voltage is given (in the same units) by the following equation.
V = 339sin(100πt)
Answer the following questions comparing the voltages in the two regions.

(a) How much greater is the maximum voltage in a European house than a US house? 
(b) What is the number of cycles (oscillations) per second in a US house?

barrycarter · Answer

What are the maximum voltages for the two households?

shane_b · Answer

http://openstudy.com/updates/503d883ae4b04d6bed310fab

shane_b · Answer

Already answered at the link above.

anonymous · Answer

well I got part a but it's part b I need help with. The answer to a is 183.

barrycarter · Answer

@Shane_B, I was intending that as a hint, not actually asking :) @cljohn, I think they wanted you to divide, not subtract?

anonymous · Answer

The assignment is online and said that answer was correct :) It is just asking the difference of aplitude for the first one

anonymous · Answer

the second part is confusing