« previous next »

Author Question: A spacecraft has captured and brought material to Earth from a comet. Indicate whether the ... (Read 23 times)

shofmannx20

  • Hero Member
  • *****
  • Posts: 562
on: Jul 27, 2018
A spacecraft has captured and brought material to Earth from a comet.
 
  Indicate whether the statement is true or false

Question 2

If a star was the same size as our Sun, but was 81 times more luminous, it must be
 
  A) twice as hot as our Sun.
  B) three times hotter than the Sun.
  C) four times hotter than the Sun.
  D) nine times hotter than the Sun.
  E) 81 times hotter than the Sun.


TheDev123

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jul 27, 2018
Answer to Question 1

TRUE

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Astronomers identified 12-billion-year-old white dwarf stars only 100 light years away from Earth Astronomers identified 12-billion-year-old white dwarf stars only 100 light years away from Earth
Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth
The Two Tails of Comet Mrkos The Two Tails of Comet Mrkos
Distance from Earth to Sun schematic Distance from Earth to Sun schematic
Earth’s Spheres Earth’s Spheres
Earth’s Lithospheric Plates Earth’s Lithospheric Plates
Video: The pH scale - Strong acids and Weak acids

For a complete list of videos, visit our video library