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

Author Question: If astronauts could travel at v = 0.90c, we on Earth would say it takes (4.2/0.90) = 4.7 years to ... (Read 53 times)

B

  • Hero Member
  • *****
  • Posts: 570
on: Jul 28, 2018
If astronauts could travel at v = 0.90c, we on Earth would say it takes (4.2/0.90) = 4.7 years to reach Alpha Centauri, 4.2 lightyears away. The astronauts disagree. How much time passes on the astronaut's clocks?
 a. 2.0 years
  c. 1.4 years
  b. 2.4 years
  d. 3.0 years

Question 2

A muon formed high in the Earth's atmosphere travels at a speed 0.990c for a distance of 6.40 km before it decays. What is the muon's lifetime as measured in its reference frame?
 a. 4.65  10-6 s
  c. 2.18  10-6 s
  b. 1.55  10-5 s
  d. 3.04  10-6 s


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

juliaf

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

D


B

  • Member
  • Posts: 570
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

marict

  • Member
  • Posts: 304
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Deciduous and permanent teeth. (A) The deciduous teeth, with the age of eruption given in months; (B Deciduous and permanent teeth. (A) The deciduous teeth, with the age of eruption given in months; (B
This portrait of Thomas Jefferson is considered an accurate likeness, painted when he was thirty-sev This portrait of Thomas Jefferson is considered an accurate likeness, painted when he was thirty-sev
Earth’s orientation Earth’s orientation
The Arctic is warming faster than any other region on Earth The Arctic is warming faster than any other region on Earth
Wavelengths that penetrate the earth's atmosphere Wavelengths that penetrate the earth's atmosphere
Escape Speed from Earth Escape Speed from Earth
Video: Genetic distance between human groups

For a complete list of videos, visit our video library