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 55 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!

bitingbit

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

A Mass-Loss Star A Mass-Loss Star
Benvenuto Cellini, Saltcellar: Neptune (Sea) and Tellus (Earth). Benvenuto Cellini, Saltcellar: Neptune (Sea) and Tellus (Earth).
Disorders of the Male Reproductive System Disorders of the Male Reproductive System
Extinction and extirpation per years Extinction and extirpation per years
Complete Digestive System: Frog Complete Digestive System: Frog
A sea star A sea star
Video: Chemical Equilibrium between N2O4 (colorless gas) and NO2 (brown gas)

For a complete list of videos, visit our video library