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

Author Question: Our best measurements from Earth indicate that the star system Alpha Centauri is 4.2 light-years ... (Read 93 times)

karateprodigy

  • Hero Member
  • *****
  • Posts: 550
on: Jul 28, 2018
Our best measurements from Earth indicate that the star system Alpha Centauri is 4.2 light-years away. Suppose some of our astronauts traveled there at a speed v = 0.90c. What would the astronauts measure as the distance to Alpha Centauri?
 a. 1.3 lightyears
  c. 1.8 lightyears
  b. 4.0 lightyears
  d. 2.7 lightyears

Question 2

A muon formed high in Earth's atmosphere travels at a speed 0.9900c for a distance (as we see it) of 9200 m before it decays. How far does the muon travel as measured in its frame?
 a. 2596 m
  c. 4554 m
  b. 1298 m
  d. 649 m


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

steff9894

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


karateprodigy

  • Member
  • Posts: 550
Reply 2 on: Jul 28, 2018
:D TYSM

kusterl

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Gracias!

« previous next »
 

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.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Lymphatic system. Lymphatic system.
Digestive System Digestive System
Receptors in the autonomic nervous system: (a) sympathetic division; (b) parasympathetic division Receptors in the autonomic nervous system: (a) sympathetic division; (b) parasympathetic division
Prevalence of drug use in the United States. Figures are based on a survey of people 12 years of age ... Prevalence of drug use in the United States. Figures are based on a survey of people 12 years of age ...
Precession of Earth Precession of Earth
The Cre-Lox system for creating conditional knockouts The Cre-Lox system for creating conditional knockouts
Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

For a complete list of videos, visit our video library