100 watts = 100 joules per second
22 watts = 22 joules per second
Saving = 78 joules per second
1 hour = 3,600 seconds
24 hours = 86,400 seconds
(78 joules/sec) x (86,400 sec) = 6,739,200 joules
The power require to keep the car traveling is 6,666 W.
The power of the engine at the given efficiency is 3,999.6 W.
<h3>What is Instantaneous power?</h3>
This the product of force and velocity of the given object.
The power require to keep the car traveling is calculated as follows;
P = Fv
![P = 300\ N \ \times \ \frac{80 \ kmh^{-1}}{3.6 \ km h^{-1}/m/s} \\\\ P = 300 \ N \times 22.22 \ m/s\\\\ P = 6,666 \ W](https://tex.z-dn.net/?f=P%20%3D%20300%5C%20N%20%5C%20%5Ctimes%20%20%5C%20%5Cfrac%7B80%20%5C%20kmh%5E%7B-1%7D%7D%7B3.6%20%5C%20km%20h%5E%7B-1%7D%2Fm%2Fs%7D%20%5C%5C%5C%5C%0AP%20%3D%20300%20%5C%20N%20%5Ctimes%2022.22%20%5C%20m%2Fs%5C%5C%5C%5C%0AP%20%3D%206%2C666%20%5C%20W)
The power of the engine at the given efficiency is calculated as follows;
![E = \frac{P_{out}}{P _{in}} \times 100\%\\\\ 60\% = \frac{P_{out}}{6,666} \times 100\%\\\\ 0.6 = \frac{P_{out}}{6,666} \\\\ P_{out} = 3,999.6 \ W](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7BP_%7Bout%7D%7D%7BP%20_%7Bin%7D%7D%20%5Ctimes%20100%5C%25%5C%5C%5C%5C%0A60%5C%25%20%3D%20%5Cfrac%7BP_%7Bout%7D%7D%7B6%2C666%7D%20%5Ctimes%20100%5C%25%5C%5C%5C%5C%0A0.6%20%3D%20%5Cfrac%7BP_%7Bout%7D%7D%7B6%2C666%7D%20%5C%5C%5C%5C%0AP_%7Bout%7D%20%3D%203%2C999.6%20%5C%20W)
Learn more about efficiency here: brainly.com/question/15418098
Answer:
washing dishes
Explanation:
my parents are always tired coming back from work so I wash dishes it will be less chores