Here’s some of them
6. J
7. I
10. O
13. F
14. E
15. N
Answer:B
Explanation:
Given
Power Produced ![P=25\ kW](https://tex.z-dn.net/?f=P%3D25%5C%20kW)
time ![t=10\ min](https://tex.z-dn.net/?f=t%3D10%5C%20min)
Gasoline consumed ![m=1.25\ kg](https://tex.z-dn.net/?f=m%3D1.25%5C%20kg)
Heat capacity of Gasoline ![C=43,000\ kJ/kg](https://tex.z-dn.net/?f=C%3D43%2C000%5C%20kJ%2Fkg)
Heat Provided by Gasoline ![Q_s=m\times C](https://tex.z-dn.net/?f=Q_s%3Dm%5Ctimes%20C)
![Q_s=1.25\times 43000=53,750\ kJ](https://tex.z-dn.net/?f=Q_s%3D1.25%5Ctimes%2043000%3D53%2C750%5C%20kJ)
Energy used in Producing Power is ![W=25\times 10\times 60=15,000\ kJ](https://tex.z-dn.net/?f=W%3D25%5Ctimes%2010%5Ctimes%2060%3D15%2C000%5C%20kJ)
Efficiency of an engine is
![\eta =\frac{Work}{Energy\ Supplied}](https://tex.z-dn.net/?f=%5Ceta%20%3D%5Cfrac%7BWork%7D%7BEnergy%5C%20Supplied%7D)
![\eta =\frac{15000}{53750}=0.2790](https://tex.z-dn.net/?f=%5Ceta%20%3D%5Cfrac%7B15000%7D%7B53750%7D%3D0.2790)
![\eta =27.90\approx 28\ \%](https://tex.z-dn.net/?f=%5Ceta%20%3D27.90%5Capprox%2028%5C%20%5C%25)
Answer:
90
Explanation:
mean is basically taking the sum of all numbers and then dividing the sum with the number of all given numbers..
here, the mean is 9, total numbers are 10.. so the sum will be 9 multiplied by 10, that is 90.
Answer:
I have solved the problem below. I hope it will let you clear the concept.
For any inquiries ask me in the comments.
Explanation: