Current would flow between them and they would receive a terrible shock.
Mercury and Venus are therefore closer to each other most of the time. But Earth is the planet closest to Venus. And that's why from here on Earth, Venus looks so big and luminous. Venus is the brightest thing in the night sky after the sun and the moon.
Answer:
a)η = 69.18 %
b)W= 1210 J
c)P=3967.21 W
Explanation:
Given that
Q₁ = 1749 J
Q₂ = 539 J
From first law of thermodynamics
Q₁ = Q₂ +W
W=Work out put
Q₂=Heat rejected to the cold reservoir
Q₁ =heat absorb by hot reservoir
W= Q₁- Q₂
W= 1210 J
The efficiency given as
![\eta=\dfrac{W}{Q_1}](https://tex.z-dn.net/?f=%5Ceta%3D%5Cdfrac%7BW%7D%7BQ_1%7D)
![\eta=\dfrac{1210}{1749}](https://tex.z-dn.net/?f=%5Ceta%3D%5Cdfrac%7B1210%7D%7B1749%7D)
![\eta=0.6918](https://tex.z-dn.net/?f=%5Ceta%3D0.6918)
η = 69.18 %
We know that rate of work done is known as power
![P=\dfrac{W}{t}](https://tex.z-dn.net/?f=P%3D%5Cdfrac%7BW%7D%7Bt%7D)
![P=\dfrac{1210}{0.305}\ W](https://tex.z-dn.net/?f=P%3D%5Cdfrac%7B1210%7D%7B0.305%7D%5C%20W)
P=3967.21 W