00:01
In this problem, we're considering a solar cell, and we're told it's 15 % efficient in converting solar to electrical energy.
00:09
And it produces an energy flow of one kilowatt per meter squared produced to full sunlight.
00:14
If the area is 40 square centimeters, we're asked to calculate the power output in watts.
00:21
Okay, i don't think this one's going to be too hard.
00:26
So let's convert our kilowatts to watts, and that'll be 1 times 10.
00:40
0 watts per meter squared.
00:48
And my area, 40 centimeters squared.
01:00
I'm going to make this a little bit narrower.
01:02
And 40 square centimeters, and i'll do that like 10 centimeters squared, 1 meter squared, equal 4 .00 times 10 to the minus dip square meters.
01:43
Okay, so my power will equal my energy flow times my area.
01:55
So power will equal my 1 .00 times 10 to the third...