Awind turbine is 12 m in diameter. the wind blowing through it is blowing at 6.1 m/s. the efficiency of the turbine in 1.5%. the density of the air is 1.225 kg/m^3, what is the power output of the turbine? a. 0.34 kw b. 24 kw c. 0.24 kw d. 0.94 kw e. none of the above and the answer is

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good