« previous next »

Author Question: A photon is A) a high-energy electromagnetic wave. B) an electron that has been ejected from a ... (Read 82 times)

MGLQZ

  • Hero Member
  • *****
  • Posts: 579
on: Jul 29, 2018
A photon is
 
  A) a high-energy electromagnetic wave.
  B) an electron that has been ejected from a metal surface by electromagnetic radiation.
  C) a particle-like quantum of radiation.
  D) one of the two types of nuclear particles.
  E) the anti-particle to the electron.

Question 2

A certain siren radiates sound uniformly in all directions. At a distance of 17 m from the siren, the intensity level is 49 db. How many watts of power does this siren put out? The threshold of human hearing is 1.0  10-12 W/m2.
 
  What will be an ideal response?


shaquita

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

2.9  10-4 W


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Energy flows in a typical gasoline-powered car Energy flows in a typical gasoline-powered car
Insects Under the Electron Microscope Insects Under the Electron Microscope
Scorpions, Spiders and Sharks: Electron-Microscope Images Scorpions, Spiders and Sharks: Electron-Microscope Images
Nerve ending scanned by electron micrograph Nerve ending scanned by electron micrograph
Radiative forcing expresses change in energy input over time Radiative forcing expresses change in energy input over time
Energy Balance and Imbalances Energy Balance and Imbalances
Video: Structures that affect circulation - kidneys, blood volume and venous tone

For a complete list of videos, visit our video library