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

Author Question: Which light source is more energy-efficient? A) a fluorescent lamp B) an incandescent lamp C) a ... (Read 352 times)

kwoodring

  • Hero Member
  • *****
  • Posts: 560
on: Jul 29, 2018
Which light source is more energy-efficient?
 
  A) a fluorescent lamp
  B) an incandescent lamp
  C) a CFL
  D) an LED

Question 2

A carpenter is driving a nail into a board. The 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Assume that half of the kinetic energy of the hammer is transformed into heat in the 15.0-g steel nail and does not flow out.
 
  What is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? The specific heat of steel is 448 J/(kgK). A) 8.1 K
  B) 3.6 K
  C) 1.8 K
  D) 2.7 K
  E) 7.7 K


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

yahahah24021

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: D

Answer to Question 2

A


kwoodring

  • Member
  • Posts: 560
Reply 2 on: Jul 29, 2018
:D TYSM

meow1234

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Methane combustion as an energy–yielding redox reaction. Methane combustion as an energy–yielding redox reaction.
Cultural Variations in the Strange Situation Across cultures, most toddlers exhibit secure attachme Cultural Variations in the Strange Situation Across cultures, most toddlers exhibit secure attachme
Play in Four Cultures Across cultures, play is the most common activity in early childhood. Source: Play in Four Cultures Across cultures, play is the most common activity in early childhood. Source:
energy of interaction and distance of particle energy of interaction and distance of particle
Mixed dishes such as hamburgers and pizza are a major source of solid fats in the diets of Americans Mixed dishes such as hamburgers and pizza are a major source of solid fats in the diets of Americans
The Visible Spectrum of Electromagnetic Energy The Visible Spectrum of Electromagnetic Energy
Video: Mitosis step-by-step

For a complete list of videos, visit our video library