Answer:
75 W
Explanation:
= temperature of the filament = 2100 K
= Emitting area of the filament = 1 cm² = 10⁻⁴ m²
= Emissivity = 0.68
= Stefan's constant = 5.67 x 10⁻⁸ Wm⁻²K⁻⁴
Using Stefan's law, Power output of the light bulb is given as
Since gas is sealed in container, volume of gas will ramain constant. from ideal gas equation PV=nRT, P/T = nR/V ==> P/T = constant.( constant since v is constant so whole term must be constant). therefore, (P/T)1 = (P/T)2.==> 50/300 = P2/360. ==> P2= 50X360/300 = 60KPa. Hope this helps
Answer:
The distance travelled is 151.22m and it took 0.97s
Explanation:
Well, this is an ARM problem, so we will need the following formulas
where 
is the initial position (we can assume is zero), 
is the initial speed of 104 m/s, 
is the initial time (we also assume is zero), a is the acceleration of 107 m/s2, v is speed, x is position and t is time.
Now that we have the formulas, we know that when the electron stops it has no speed. Then we calculate how much time it takes to stop.
Finally, we calculate the distance travelled in this time
Answer:
The electric power generated by the wind turbine is 1105.84 kWh
The amount of electric energy generated is 26540.17 kWh
The revenue generated per day is $2388.62
Explanation:
Consider a wind turbine with a blade
Span diameter of 100 m installed at a site
subjected to steady winds at 8 m/s
l.e wind speed v = 8 m/s
Span diameter d = 100 m
A, sweap area = πd² / 4
= π x 100² / 4
= 7853.98 m²
Lets solve for wind speed v = 8 m/s
Density of Area ρ = 1.25 kg/m³
η = 44%
P = 1/2 ρAv³η
= 1/2 x 1.25 x 785.98 x 8³ x 44/100
= 1/2 x 1.25 x 7853.98 x 512 x 0.44
= 1105840.38
= 1.10584038 mw
= 1105.84038 kWh
= 1105.84 kWh
Energy generated by wind turbine per day
⇒ P x H
= 1105.84038 x 24
= 26540.16912 kwh
= 26540.17 kwh
Revenue generated per day = Energy x 0.09 kwh
= 26540.16912 x 0.09
= $2388.615
= $2388.62
