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 66 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
:D TYSM

TheNamesImani

  • Member
  • Posts: 334
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

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

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

NaCl crystals dissolving in water NaCl crystals dissolving in water
The water cycle. The water cycle.
Xeriscaping Conserves Water Xeriscaping Conserves Water
Daily Water Balance in the Body Daily Water Balance in the Body
Advantages and DisAdvantages of Radiant super-heater Advantages and DisAdvantages of Radiant super-heater
Water transport in plants. Water transport in plants.
Video: ADH and the arterioles, kidneys, sweat glands and the Atrial natriuretic peptide (ANP)

For a complete list of videos, visit our video library