Physics, 19.07.2019 21:20 HaJEReMY5170
Awind turbine is rotating at 15 rpm under steady winds flowing through the turbine at a rate of 42,000 kg/s. the tip velocity of the turbine blade is measured to be 250 km/h. if 180 kw power is produced by the turbine, determine (a) the average velocity of the air and (b) the conversion efficiency of the turbine. take the density of air to be 1.31kg/m3.
Answers: 3
Physics, 22.06.2019 19:30
Which of the following compounds would be primarily ionic? methane, ch4, ammonia nh3, calcium chloride, cacl2, or carbon dioxide, co2
Answers: 1
Physics, 22.06.2019 22:50
Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?
Answers: 1
Physics, 23.06.2019 00:00
Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.
Answers: 1
Awind turbine is rotating at 15 rpm under steady winds flowing through the turbine at a rate of 42,0...
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