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

Author Question: Process of Science: Given that Einstein's equations naturally showed the possibility of an ... (Read 31 times)

TFauchery

  • Hero Member
  • *****
  • Posts: 500
on: Jul 27, 2018
Process of Science: Given that Einstein's equations naturally showed the possibility of an accelerating Universe, why have astronomers only recently found strong evidence for dark energy?
 
  What will be an ideal response?

Question 2

Elements heavier than hydrogen and helium constitute about ________ of the mass of the interstellar medium.
 
  A) 0.002
  B) 2
  C) 70
  D) 98


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

medine

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 27, 2018
Answer to Question 1

The difference between a coasting and accelerating expansion is only apparent at very large lookback times. It therefore requires careful observations of white dwarf supernovae in distant galaxies. This only became possible a little over a decade ago. Similarly, we have only recently gained the instrumentation possible to study the tiny fluctuations in the cosmic microwave background that also point to a flat Universe that is indicative of dark energy.

Answer to Question 2

B


TFauchery

  • Member
  • Posts: 500
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

frankwu0507

  • Member
  • Posts: 322
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Albert Einstein Albert Einstein
Critical thinking and the evaluation process Critical thinking and the evaluation process
Maps are important tools in political science as they help us see relationships between politics and Maps are important tools in political science as they help us see relationships between politics and
(a) The phagocytic process, beginning in the upper left with bacterial attachment and phagocytic ... (a) The phagocytic process, beginning in the upper left with bacterial attachment and phagocytic ...
Science Joke Science Joke
Solve the following equations: Solve the following equations:
Video: Calvin cycle (The light-independent reactions )

For a complete list of videos, visit our video library