If the bottom of the blue line on the right side of a Min/Max Thermometer is at +27, what does that tell you about the temperatu
1 answer:
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Explanation:
The first attachment contains the complete question while the second attachment is the solution.
Answer:
a) 5.22 m/s
b) 31.4 %
Explanation:
f = rotating speed = 15 rpm = 15/60 =0.25 rps
m = Mass flow rate of air = 42000 kg/s
v = Tip velocity = 250 km/h = 250/3.6 = 69.44 m/s
W = Work output = 180 kW
A = Swept area of wind turbine
r = Radius of wind turbine
η = Efficiency
∴ The average velocity of the air is 5.22 m/s
∴ Conversion efficiency of the turbine is 0.314 or 31.4 %
Answer:
option d is correct
work done is 647 J
Explanation:
Given data
pressure P = 3 atm
volume V1 = 2 L
volume V2 = 8 L
to find out
work is done by the gas
solution
we know that work done formula that is
work done = k ( -
) / n
here n = 1 - γ
and k = PV^γ
and we know for diatomic gas γ = 1.4
so k will be = ( 3× 101325 ) ×
k = 50.62
so that now
work done = k ( -
) / n
work done = 50.62 ( -
) / 1-1.4
so work done will be 647 J
so option d is correct
work done is 647 J