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3 years ago

11

A car, starting from rest, accelerates in a straight-line path at a constant rate of 2.5 m/s2. How far will the car travel in 12

seconds?

1 answer:

Ksenya-84 [330]3 years ago

6 0

Answer:

180 m

Explanation:

i found the formula

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Large wind turbines with a power capacity of 8 MW and blade span diameters of over 160 m are available for electric power genera

andriy [413]

Answer:

85413.20177 W

2050.831684248 kWh

184.5748512 dollars

Explanation:

d = Diameter of blade = 100 m

r = Radius = $\dfrac{d}{2}=\dfrac{100}{2}=50\ m$

$\eta$ = Efficiency = 0.34

$\rho$ = Density of air = 1.25 kg/m³

V = Velocity of wind = 8 m/s

A = Area = $\pi r^2$

The power of a wind turbine is given by

$P=\dfrac{1}{2}\rho AV^3\eta\\\Rightarrow P=\dfrac{1}{2}\times 1.25\times \pi\times 50^2\times 8^3\times 0.34\\\Rightarrow P=854513.20177\ W$

The power is 85413.20177 W

Energy is given by

$E=Pt\\\Rightarrow E=854513.20177\times 24\\\Rightarrow E=20508316.84248\ Wh\\\Rightarrow E=2050.831684248\ kWh$

The energy is 2050.831684248 kWh

The revenue is given by

$0.09\times 2050.831684248=184.5748512\$$

The revenue generated is 184.5748512 dollars

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