« previous next »

Author Question: The second most abundant element in the solar system is A) silicon. B) helium. C) oxygen. D) ... (Read 60 times)

Themember4

  • Hero Member
  • *****
  • Posts: 538
on: Jul 27, 2018
The second most abundant element in the solar system is
 
  A) silicon. B) helium. C) oxygen. D) hydrogen. E) carbon.

Question 2

How do we know the expansion of the universe is accelerating?
 
  A) We're really not that sure the expansion is accelerating; it's all just a theory.
  B) The rotation curves of galaxies indicate the universe is speeding up.
  C) White dwarf supernova in distant galaxies are fainter than they would be if the expansion were not accelerating.
  D) Redshifts of distant galaxies are increasing with time, so when we repeat the measurements, the redshifts are larger.
  E) We see more of the universe every night, as the observable universe grows in size.


ktidd

  • Sr. Member
  • ****
  • Posts: 319
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Themember4

  • Hero Member
  • *****
  • Posts: 538
Reply #2 on: Jul 27, 2018
TY


ktidd

  • Sr. Member
  • ****
  • Posts: 319
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

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?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

REPRODUCTIVE SYSTEM REPRODUCTIVE SYSTEM
Write-It-Once System Write-It-Once System
Disorders of the Female Reproductive System Disorders of the Female Reproductive System
Procedures for Diagnostic Tests Related to the Digestive System Procedures for Diagnostic Tests Related to the Digestive System
Female Reproductive System "الجهاز التناسلي للأنثى" Female Reproductive System "الجهاز التناسلي للأنثى"
In 1974 a UC Berkeley group fired an oxygen nucleus at a californium target. Giv In 1974 a UC Berkeley group fired an oxygen nucleus at a californium target. Giv
Video: Ear Virtual Tour Animation

For a complete list of videos, visit our video library