A 1/10th scale model of an airplane is tested in a wind tunnel. The reynolds number of the model is the same as that of the full scale airplane in air. The velocity in the wind tunnel is then

Simplify completely: - 3 (4-9) + 6-2 (-8+5)

You run 100 m in 25 s. If you later run the same distance in less time, explain if your average speed increase or decrease.

Food provide your body with

Sound waves are produced by the horn of a truck that is approaching a stationary observer. Compared to the sound waves detected by the driver of the truck, the sound waves detected by the observer have a greater (1) wavelength (3) period (2)

What is electrical power? how to measure power?

The period of a 440 Hertz sound wave is __ seconds. 1/440 1/220 220 440

Match the term to the correct description. ~A type of circuit where part of the loop is broken. ~The flow of electrons. ~A loop that creates a pathway for electricity to follow. ~A type of circuit with only one path for the electricity to follow.

What is the mass of an object that is accelerating at 10 m/s^2 when a force of 2,386 N is exerted

According to the U. S. Green Building Council, what percentage of the world's energy use and greenhouse gas emissions can be attributed to buildings?

Magnets are often fitted to the doors of refrigerators and cupboards WHY?