This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The heating coil of a hot water heater has a resistance of 20 ohms and operates at 210 V. If ... (Read 60 times)

ap345

  • Hero Member
  • *****
  • Posts: 537
on: Jul 28, 2018
The heating coil of a hot water heater has a resistance of 20 ohms and operates at 210 V. If electrical energy costs 5.5 cents per kW-hr, what does it cost to raise the 200 kg of water in the tank from 15C to 80C? (The specific heat of water is 4 186 J/kgC)

Question 2

A high-voltage transmission line carries 1 000 A at 700 kV for a distance of 100 miles. If the resistance per length in the wire is 0.5 W/mile, what is the power loss due to resistive losses?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

emily12345

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jul 28, 2018
Answer to Question 1

83 cents

Answer to Question 2

50 MW


ap345

  • Member
  • Posts: 537
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

pratush dev

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Upward transport of water in xylem. Upward transport of water in xylem.
Water amount needed to grow crops Water amount needed to grow crops
Rotary engine operates on the four-stroke cycle but uses a rotor instead of a piston and crankshaft ... Rotary engine operates on the four-stroke cycle but uses a rotor instead of a piston and crankshaft ...
Diversion of surface water Diversion of surface water
Glacial deposits overlain by marine carbonates formed in very warm water Glacial deposits overlain by marine carbonates formed in very warm water
What mass, in grams, of a 5.00% by mass sugar water solution is needed to supply What mass, in grams, of a 5.00% by mass sugar water solution is needed to supply
Video: Nervous pathway to the Neuromuscular (NMJ)

For a complete list of videos, visit our video library