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Author Question: An electric clothes dryer draws 20 A at 220 V. If the clothes put into the dryer have a mass of 7.0 ... (Read 93 times)

nenivikky

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  • Posts: 516
on: Jul 28, 2018
An electric clothes dryer draws 20 A at 220 V. If the clothes put into the dryer have a mass of 7.0 kg when wet and 3.0 kg dry, how long does it take to dry the clothes? (Assume all heat energy goes into vaporizing water, Lv = 2.26  106 J/kg.)
 a. 55 min
  c. 16 min
  b. 26 min
  d. 34 min

Question 2

A solid sphere, a solid cylinder, and a hoop each have the same mass and radius. If they are spinning at the same angular velocity, which one has the greatest angular momentum?
 a. the sphere
  b. the cylinder
  c. the hoop
  d. They all have the same angular momentum.


AngeliqueG

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Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

C


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