In the far west states of the country, one can find wind farms with wind turbines that turn in response to a force of high-speed air resistance, r = ½drhoav2. the power available is p = rv = ½drhoπr2v3, where v is the wind speed and we have assumed a circular face for the wind turbine of radius r. take the drag coefficient d = 1.00 and the density of air as 1.20 kg/m3.(a) for a wind turbine having r = 1.30 m, calculate the power available (in kw) for a velocity of v = 8.40 m/s.(b) for a wind turbine having r = 1.30 m, calculate the power available (in kw) for a velocity of v = 25.5 m/s.
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Physics, 22.06.2019 06:30
The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?
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Physics, 22.06.2019 14:00
Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.
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Physics, 22.06.2019 16:30
3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?
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Physics, 22.06.2019 20:30
Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3
Answers: 1
In the far west states of the country, one can find wind farms with wind turbines that turn in respo...
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