Which scientist determined that the farther a planet is from the sun, the longer it takes to orbit the sun?
copernicus
halley
kepler
doppler

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl, max are applied?

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.