A fan blade makes 25 revolutions every 3 seconds. What is the period? * 10 points
8.3 s
25s
0.12 sec
3 sec

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 .

Carbon tetrachloride (ccl4) is ionic or convalent

Acid rain is caused by human activity. select the best answer from the choices provided t f