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

Author Question: Our calendar has leap years because A) there is one more sidereal day in a year than solar days. ... (Read 156 times)

Bob-Dole

  • Hero Member
  • *****
  • Posts: 547
on: Jul 27, 2018
Our calendar has leap years because
 
  A) there is one more sidereal day in a year than solar days.
  B) a tropical year is slightly more than 365 days.
  C) there is a difference between a sidereal year and a tropical year.
  D) the perihelion of Earth's orbit is slowly advancing.

Question 2

The most active galactic nuclei are usually found at large distances from us; relatively few nearby galaxies have active galactic nuclei. What does this imply?
 
  A) Supermassive black holes existed only when the universe was young and no longer exist today.
  B) Active galactic nuclei tend to become less active as they age.
  C) Active galactic nuclei can form only at large distances from the Milky Way.
  D) The jets seen in many active galactic nuclei must cause them to move far away from us.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

matt

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

B

Answer to Question 2

B


Bob-Dole

  • Member
  • Posts: 547
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

peter

  • Member
  • Posts: 330
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

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?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Solar Harvesting Device Solar Harvesting Device
Changes in Synaptic Density From Birth to Age 2 Synaptic connections increase throughout the first Changes in Synaptic Density From Birth to Age 2 Synaptic connections increase throughout the first
In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it. In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it.
A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a
The human eye, a product of 600 million years of evolution (Lamb, Collin, & Pugh, 2007). The human eye, a product of 600 million years of evolution (Lamb, Collin, & Pugh, 2007).
A non-interest-bearing five-year note for $54600.00 issued May 1, 2015, is discounted April 1, ... A non-interest-bearing five-year note for $54600.00 issued May 1, 2015, is discounted April 1, ...
Video: Alternative Energy Sources

For a complete list of videos, visit our video library