The speed of light is 300,000,000 m/s. Red light has a wavelength of 0.0000007 m. What is its frequency?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

What is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?