34. State the number of significant digits in each of the following measurements.
a. 0.000 03 m c. 80.001 m
b. 64.01 fm
d. 0.720 ug

Which would not reduce the amount of green house gasses in the air

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?