Author Question: A fan is turned off, and its angular speed decreases from 10.0 rad/s to 6.3 rad/s in 5.0 s. What is ... (Read 94 times)

daltonest1984 · **on:** Jul 29, 2018

A fan is turned off, and its angular speed decreases from 10.0 rad/s to 6.3 rad/s in 5.0 s. What is the magnitude of the angular acceleration of the fan?

A)

0.86 rad/s2

B)

0.74 rad/s2

C)

0.37 rad/s2

D)

11.6 rad/s2

E)

1.16 rad/s2

Question 2

330 g of water at 55C are poured into an 855 g aluminum container with an initial temperature of 10C. The specific heat of aluminum is 900 J/(kgK).

What is the final temperature of the system, assuming no heat is exchanged with the surroundings?
A)

28C

B)

39C

C)

31C

D)

33C

E)

35C