Amodel propeller 1 m in diameter is tested in a wind tunnel. air approaches the propeller at 50 m=s when it rotates at 1800 rpm. the thrust and torque measured under these conditions are 100 n and 10 nm, respectively. a prototype eight times as large as the model is to be built. at a dynamically similar operating point, the approach air speed is to be 130 m=s. calculate the speed, thrust, and torque of the prototype propeller under these conditions, neglecting the effect of viscosity but including density

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

What is a possible result of higher air temperature caused by global warming

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v