Find the number of significant figures in each of the following.

81.0 ± 0.8

The metric unit of electrical power is the watt volt ampere ohm

What is a good example of instantaneous speed

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .