« previous next »

Author Question: An electron and a positron (antielectron), both nearly at rest, collide. What particle(s) is(are) ... (Read 39 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?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Insects Under the Electron Microscope Insects Under the Electron Microscope
Nerve ending scanned by electron micrograph Nerve ending scanned by electron micrograph
Neck stretch. Rest the receiver’s head on the palm of your right hand, taking a firm hold on the ... Neck stretch. Rest the receiver’s head on the palm of your right hand, taking a firm hold on the ...
A racing car accelerates uniformly from rest along a straight track. This track has markers ... A racing car accelerates uniformly from rest along a straight track. This track has markers ...
Electron micrograph of mitochondrial DNA derived from the frog Xenopus laevis Electron micrograph of mitochondrial DNA derived from the frog Xenopus laevis
Electron micrograph of Euglena gracilis Electron micrograph of Euglena gracilis
Video: Effect of blood chemistry - stimuli, hyperventilation response and hypoventilation response

For a complete list of videos, visit our video library