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

Author Question: Gentle gravitational tidal forces appear to be necessary to create spiral arms. a. True b. False ... (Read 67 times)

ssal

  • Hero Member
  • *****
  • Posts: 572
Gentle gravitational tidal forces appear to be necessary to create spiral arms.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

Why are X-rays and gamma rays considered dangerous forms of light?
 
  a. These forms of light are only produced by large, dangerous machines.
  b. There is no form of protection from these forms of light.
 c. These forms of light break through Earth's atmosphere.
 d. Photons of these wavelengths have high energy.
 e. These forms of light cause sunburn.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

randomguy133

  • Sr. Member
  • ****
  • Posts: 310
Answer to Question 1

True

Answer to Question 2

d





 

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

For a complete list of videos, visit our video library