This topic contains a solution. Click here to go to the answer

Author Question: A 100 W lightbulb has an energy efficiency of 5. It is turned on for one minute. During this time, ... (Read 48 times)

maegan_martin

  • Hero Member
  • *****
  • Posts: 532
A 100 W lightbulb has an energy efficiency of 5. It is turned on for one minute. During this time, the visible radiant energy output of the lightbulb is
 
  A) 300 J.
  B) 6000 J.
  C) 5700 J.
  D) impossible to determine because we don't know the voltage.
  E) impossible to determine because we don't know the power.

Question 2

A 25-g string is stretched with a tension of 43 N between two fixed points 12 m apart. What is the frequency of the second harmonic?
 
  A) 18 Hz B) 24 Hz C) 36 Hz D) 12 Hz E) 6.0 Hz



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mohan

  • Sr. Member
  • ****
  • Posts: 362
Answer to Question 1

A

Answer to Question 2

D




maegan_martin

  • Member
  • Posts: 532
Reply 2 on: Jul 29, 2018
:D TYSM


6ana001

  • Member
  • Posts: 311
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

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.

For a complete list of videos, visit our video library