Efficiency or 
is calculated by formula: 
where 
also efficiency has no unit.
Now put in the data and calculate the efficiency.
The efficiency of the machine is 0.8
If you want to get percentage just multiply by 100 and you get 80%
Hope this helps.
r3t40
Answer:
Explanation:
Let equal mass of Ne and Kr be m gm
no of moles of Ne and Kr will be m / 20 and m / 84 ( atomic weight of Ne and Kr is 20 and 84 )
Let the pressure and volume of both the gases be P and V respectively .
The temperature of Ne be T₁ and temperature of Kr be T₂.
For Ne
PV = (m / 20) x R T₁
For Kr
PV = (m / 84) x R T₂
T₁ / T₂ = 84 / 20
We know that
average KE of an atom of mono atomic gas = 3 / 2 x k T
k is boltzmann constant and T is temperature .
KEKr/KENe = T₂ / T₁
= 20 / 84
Answer:
It does not indicate the car's direction. Since velocity is both magnitude and direction, the speedometer measures speed but does NOT measure velocity
Answer:
d. light microscopy allows one to view dynamic processes in living cells.
Explanation:
One advantage of light microscopy over transmission electron microscopy is that light microscopy allows one to view dynamic processes in living cells.
Electron microscope differ from the light microscope because electron micoscope produce the image of the specimen using electron beam and not light. Electron microscopy samples must be kept in vacuum, this means live cells can not be imaged.
Answer:
Slit separation, 
Explanation:
It is given that,
Wavelength of light, 
The angle between the central bright fringe and the second dark fringe, 
In case of double slits, the condition for dark fringe is given by :
n = 2
So, the slit separation is 
. Hence, this is the required solution.
