What do radio waves and microwaves have in common?
a. both have shorter wavelengths than visible light.
b. both are located to the right of visible lights on the spectrum.
c. both have higher frequencies than visible light.
d. both are located next to visible light on the spectrum.

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.)

Which type of circuit is becoming more common in residential electrical design and construction? a. hazardous-area circuit b. three-phase circuit c. 480-volt circuit d. communication circuit

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.