The number 0.00243 has how many significant digits?
a. 3
b. 4
c. 5
d. 6

Energy is the ability to do work which measures what

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.

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.