the range of visible light wavelengths is between 3.9 x 10^-7m and 7.0 x 10^-7m. what's is the corresponding range of frequencies for visible light?

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s.calculate eddy’s power rating

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?