Asappp ! exercise 2: a 15-watt led needs 25 watts of power to produce the same amount of light as
the 100-watt incandescent bulb.
1. if the led light bulb is left on for 168 hours (a whole week), how many watt-hours of
energy does it consume?
2. how many kilowatt-hours of energy does it consume?
3. how much did it cost to leave the light bulb on?
4. how many pounds of carbon dioxide equivalents did leaving the light bulb on release?
then you do 5736 x 8 = 45,888 watts used in 8 days
We can calculate the watts per hour for one hour:
The electric heater uses 3/5 Watts per hour. To determine the Watts that it uses we must multiply by the number of hours it is being used, which is a 1/2 hour:
The electric heaters uses 0.3 Watts of power for 1/2 hour.
293 watts x 24 hours= 5736 watts a day
5736x8= 45,888 watts use for eight days
Find out the how many watts would it use if it is on for 8 days .
Let us assume that the watts would it use if it is on for 8 days be x .
A computer uses 239 watts per hour.
As in one day there are 24 hours .
Than the equation becomes
x = 239 × 24 × 8
x = 45888 watts
Therefore 45888 watts of computer uses if it is on for 8 days .
The computer uses 45,888 watts in 8 days
when the chinese communist party took power in 1949, it began to build new di and levees to hold the yellow and yangtze rivers back.
the answer is "c" im pretty sure.