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 86 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
Gracias!

upturnedfurball

  • Member
  • Posts: 334
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Artist's rendition of the view from a hypothetical airless planet orbiting Alpha Centauri A Artist's rendition of the view from a hypothetical airless planet orbiting Alpha Centauri A
Limbic system. Limbic system.
Saturn’s Ring System Saturn’s Ring System
TEN RULES OF PERFORMANCE IN A REDESIGNED HEALTH CARE SYSTEM TEN RULES OF PERFORMANCE IN A REDESIGNED HEALTH CARE SYSTEM
The Skeletal System and Homeostasis The Skeletal System and Homeostasis
The CRISPR/Cas system mediates an adaptive immune response in prokaryotes The CRISPR/Cas system mediates an adaptive immune response in prokaryotes
Video: Summary of glucose catabolism

For a complete list of videos, visit our video library