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 44 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
Wow, this really help

Alyson.hiatt@yahoo.com

  • Member
  • Posts: 354
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Solar Energy Solar Energy
Changes in Time Spent with Family Members Changes in Time Spent with Family Members
Earth scientists have devised a scheme to divide the planet’s natural history into distinct time ... Earth scientists have devised a scheme to divide the planet’s natural history into distinct time ...
Attributes of Major Energy Channels According to Traditional Chinese Medicine Attributes of Major Energy Channels According to Traditional Chinese Medicine
A clock is showing the time as exactly 3:00 p.m. and 25 s. A clock is showing the time as exactly 3:00 p.m. and 25 s.
Humans take in energy by eating food Humans take in energy by eating food
Video: Nerve Impulse Transmission Animation

For a complete list of videos, visit our video library