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

Author Question: A 100 W lightbulb has an energy efficiency of 5. It is turned on for one minute. During this time, ... (Read 50 times)

maegan_martin

  • Hero Member
  • *****
  • Posts: 532
on: Jul 29, 2018
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
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

D


maegan_martin

  • Member
  • Posts: 532
Reply 2 on: Jul 29, 2018
Gracias!

momolu

  • Member
  • Posts: 320
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

An Estimate of the Time of Global Peak Conventional Oil Production An Estimate of the Time of Global Peak Conventional Oil Production
Metabolic pathways involved in lipolysis, the breakdown of fats (triglycerides) for energy. Metabolic pathways involved in lipolysis, the breakdown of fats (triglycerides) for energy.
El Niño events release energy El Niño events release energy
The growth in demand for energy use is met by burning fossil fuels The growth in demand for energy use is met by burning fossil fuels
Ionization energy Ionization energy
Time-of-entry mapping Time-of-entry mapping
Video: Chloroplast Structure & Light Dependent Reactions (Photosystem 1 and 2 Cyclic Electron Flow)

For a complete list of videos, visit our video library