How was the speed of light measured in a precise way?
by timing the speed of falling meteorites
by using rotating mirrors to measure light’s round trip travel to a distant mountain
by timing how long it takes for an assistant far away to turn on a lantern after the
scientist turns one on
by watching for eclipses

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .

What occurs during a combustion reaction

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)