« previous next »

Author Question: Astronomers can tell that the Sun moves at about _____. A) 225 km/s B) 240 km/s C) 265 km/s ... (Read 17 times)

SGallaher96

  • Hero Member
  • *****
  • Posts: 509
on: Jul 27, 2018
Astronomers can tell that the Sun moves at about _____.
 
  A) 225 km/s
  B) 240 km/s
  C) 265 km/s
  D) 280 km/s

Question 2

Which of the following is true of the spiral density wave theory?
 
  A) It explains the formation of stars in self-sustaining star formation regions.
  B) It establishes that spiral arms are wound up by differential rotation.
  C) It does not account for the branches and spurs in spiral arms.
  D) It does not explain the spiral structure of spiral galaxies.


rosiehomeworddo

  • Sr. Member
  • ****
  • Posts: 306
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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
An electrocardiogram (EKG) wave, a record of the electrical signal as it moves through the conductio An electrocardiogram (EKG) wave, a record of the electrical signal as it moves through the conductio
Osmosis: Water moves from an area of low solute concentration to an area of higher solute ... Osmosis: Water moves from an area of low solute concentration to an area of higher solute ...
The side injector combines with the shape of the piston to create a swirl as the piston moves up ... The side injector combines with the shape of the piston to create a swirl as the piston moves up ...
The piston creates a tumbling force as it moves upward. The piston creates a tumbling force as it moves upward.
How water moves through a tree How water moves through a tree
Video: Dissociative Disorders (Part 1)

For a complete list of videos, visit our video library