« previous next »

Author Question: How much money would you save per hour by replacing a 100-watt incandescent light bulb with an ... (Read 62 times)

ARLKQ

  • Hero Member
  • *****
  • Posts: 571
on: Aug 27, 2018
How much money would you save per hour by replacing a 100-watt incandescent light bulb with an equally bright 20-watt fluorescent bulb? Assume the cost for electricity to be 15 cents per kilowatt-hour.
 
  A) 1.5 cents per hour
  B) 1.2 cents per hour
  C) 0.3 cent per hour
  D) It's not possible to save only a fraction of a cent.

Question 2

Why are gas turbines more efficient at generating electricity than steam turbines?
 
  A) Gas is combustible, but steam is not.
  B) Electricity conducts better through the gas exhausts, which are ionized.
  C) Water has a relatively high specific heat capacity.
  D) Their hot combustion products provide more energy to turn the turbine.


kbennett34

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Part of the Hubble Ultra-Deep Field image showing a typical section of space containing galaxies int Part of the Hubble Ultra-Deep Field image showing a typical section of space containing galaxies int
Absorbance of Light by Rods and Cones Absorbance of Light by Rods and Cones
Using a vacuum hose and a test light to ground one cylinder at a time on a distributorless ignition ... Using a vacuum hose and a test light to ground one cylinder at a time on a distributorless ignition ...
(a) A turbidometry detector measures laser light directly across from the light source. The sample, ... (a) A turbidometry detector measures laser light directly across from the light source. The sample, ...
Press up under the cheekbones. Use light to moderate pressure to press into the soft tissues up ... Press up under the cheekbones. Use light to moderate pressure to press into the soft tissues up ...
Normal and abnormal corneal light reflection test Normal and abnormal corneal light reflection test
Video: Miller's reaction chamber experiment Animation

For a complete list of videos, visit our video library