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

Author Question: Let m represent the mass of an electron, and c represent the speed of light. In order to create an ... (Read 20 times)

MGLQZ

  • Hero Member
  • *****
  • Posts: 579
on: Jul 29, 2018
Let m represent the mass of an electron, and c represent the speed of light. In order to create an electron-positron pair, we must start with a photon whose energy is
 
  A) at least mc2.
  B) at least 2mc2.
  C) at least 4mc2.
  D) any value greater than zero.
  E) Actually it is impossible to create such pairs from photons.

Question 2

The two great theories of 20th-century physics are quantum theory and
 
  A) the theory of relativity.
  B) thermodynamics.
  C) Hamiltonian mechanics.
  D) the bootstrap theory of elementary particles.
  E) electromagnetism.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

chloejackso

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

A


MGLQZ

  • Member
  • Posts: 579
Reply 2 on: Jul 29, 2018
YES! Correct, THANKS for helping me on my review

nyrave

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Micrographs of nerve cells taken with different types of light microscopes. Micrographs of nerve cells taken with different types of light microscopes.
Why leaves are green: interaction of light with chloroplasts. Why leaves are green: interaction of light with chloroplasts.
Scorpions, Spiders and Sharks: Electron-Microscope Images Scorpions, Spiders and Sharks: Electron-Microscope Images
Electrospray mass spectrometry of a protein Electrospray mass spectrometry of a protein
A laser emits a pulse of light that lasts 10 ns. The light has a wavelength of 690 nm, and each ... A laser emits a pulse of light that lasts 10 ns. The light has a wavelength of 690 nm, and each ...
Mass Extinctions Mass Extinctions
Video: Premenstrual Syndrome

For a complete list of videos, visit our video library