This topic contains a solution. Click here to go to the answer

Author Question: Someone in Earth's rest frame says that a spaceship's trip between two planets took 10.0 y, while an ... (Read 148 times)

cabate

  • Hero Member
  • *****
  • Posts: 537
Someone in Earth's rest frame says that a spaceship's trip between two planets took 10.0 y, while an astronaut on the space ship says that the trip took 6.27 y. Find the speed of the spaceship in terms of the speed of light.
 
  A) 0.779c
  B) 0.687c
  C) 0.975c
  D) 0.384c

Question 2

In Ptolemy's theory, retrograde planetary motion is explained as
 
  A) the backward part of the planet's loop-the-loop orbits around Earth.
  B) due to the back-and-forth or oscillatory motion that planets make as they move along their circular orbits around Earth.
  C) due to the natural wandering of the celestial sphere of background stars.
  D) a result of Earth's motion: as Earth passes another planet, that planet appears to move backward as seen against the background stars.
  E) Actually he didn't have an explanation for this.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

peilian

  • Sr. Member
  • ****
  • Posts: 316
Answer to Question 1

A

Answer to Question 2

A




cabate

  • Member
  • Posts: 537
Reply 2 on: Jul 29, 2018
Wow, this really help


aliotak

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Excellent

 

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

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?

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?

The FDA recognizes 118 routes of administration.

For a complete list of videos, visit our video library