Professor Brown holds on to the end of the second hand of a clock atop city hall. If the second hand is 2.77 m long, what is the professor's centripetal acceleration?

a. 4.27E-2 m/s/s
b. 2.02E-2 m/s/s
c. 2.61E-2 m/s/s
d. 2.29E-2 m/s/5
e. 3.04E-2 m/s/s
f. 3.44E-2 m/s/s
h. 3.91E-2 m/s/s
i. 4.62E-2 m/s/s

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit