« previous next »

Author Question: An electron and a positron (antielectron), both nearly at rest, collide. What particle(s) is(are) ... (Read 75 times)

Pea0909berry

  • Hero Member
  • *****
  • Posts: 573
on: Jul 28, 2018
An electron and a positron (antielectron), both nearly at rest, collide. What particle(s) is(are) produced?
 a. One photon of energy 1.02 MeV
  b. Two photons of energy 511 keV
  c. A pi-meson
  d. A K-meson and an anti-neutrino

Question 2

On March 21, the noonday Sun is overhead at what latitude?
 a. 0
  b. 23.5N
  c. 23.5S
  d. That of the Tropic of Cancer


Liamb2179

  • Sr. Member
  • ****
  • Posts: 365
Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

a


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Although Tasmanian devils are nocturnal, they like to rest in the sun. Scarring from fighting is vis Although Tasmanian devils are nocturnal, they like to rest in the sun. Scarring from fighting is vis
An electron micrograph of an E. coli cell An electron micrograph of an E. coli cell
Electron Microscope Images of a Diatom Electron Microscope Images of a Diatom
The electron-carrying coenzymes NAD+ and FAD The electron-carrying coenzymes NAD+ and FAD
energy of interaction and distance of particle energy of interaction and distance of particle
An electron micrograph of chloroplast DNA (cpDNA) derived from lettuce An electron micrograph of chloroplast DNA (cpDNA) derived from lettuce
Video: The Lac Operon in E. Coli

For a complete list of videos, visit our video library