On a cold winter day, the outside temperature is -20C and the ...

[bobbie]

On a cold winter day, the outside temperature is -20C and the inside temperature is maintained at 20C. There is a net heat flow to the outside through the walls, roof, etc., of 25 kW.
 
  What is the rate of increase of the entropy of the universe as a result of this? A) 13 W/K
  B) 25 W/K
  C) 85 W/K
  D) 99 W/K
  E) 0 W/K

Question 2

A mass is attached to a spring. It oscillates at a frequency of 4.0 Hz when displaced a distance of 2.0 cm from equilibrium and released. What is the maximum velocity attained by the mass?
 
  A) 0.08 m/s
  B) 0.32 m/s
  C) 0.02 m/s
  D) 0.40 m/s
  E) 0.50 m/s

[lgoldst9]

Answer to Question 1

A

Answer to Question 2

E