Tuesday hmwk, notes on Power, Optional Assignment

Notes from today on electric power

Homework due Tuesday:  p. 884#138-140, 148  AND p. 420#1-4,13

Bring lab journals Tuesday and Wed!

First 2013 optional assignment:
Find (or calculate using the information you can find) values for the following categories of FIVE items in your home:
Item name    Voltage           Power        Current       Resistance     Cost to run 1 month (assume $.09 /kWh)
(like TV)      (usually 120v                                                         ex. 3 hours/day *30 days * wattage in kW
                     unless plugged into                                                                      *9 cents per kWh
             a transformer at the wall)
Due no later than Friday, Jan 25