1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Olegator [25]
3 years ago
12

Define light year, and explain how and why light years are used to measure distance in the universe

Biology
1 answer:
Paha777 [63]3 years ago
6 0

A light-year is the distance that light travels in empty space in one year. Since the speed of light is about 300,000 km per second (about 186,000 miles per second), then a light year is about 10 trillion kilometers (about 6 trillion miles).

The light year is used in astronomy because the universe is huge. Space objects such as stars and galaxies may be hundreds, thousands or millions of light years away.

You might be interested in
in order to keep a resting membrane potential, the active transport of the sodium and potassium pump must function to keep:
krek1111 [17]

The active transport of the sodium and potassium pump must work to maintain: A high concentration of sodium outside the cell and a high concentration of potassium inside the cytosol in order to maintain a resting membrane potential.

Active transport in cellular biology refers to the movement of molecules or ions across a cell membrane against the concentration gradient from a location of lower concentration to a region of higher concentration. Cellular energy is needed for active transport to achieve this movement.

The electrical potential differential across the plasma membrane of a cell during its non-excited condition is referred to as the resting membrane potential of the cell. The value of the electrical potential difference inside a cell compared to the extracellular environment is often used to indicate the difference across a cell membrane.

To learn more about Active transport click here,

brainly.com/question/12133248

#SPJ4

5 0
1 year ago
Which front is not a standard weather front?
VladimirAG [237]
Cool front is not a standard weather front. Cold front, warm front and occluded front are all standard weather front. When you say weather front, it is a boundary that separate 2 air masses.
5 0
3 years ago
PLEASE ANSWER ASAP!!! illegal fishing is thought to account for what percentage of fish caught? 10–20 percent 15–40 percent 20–5
marysya [2.9K]

Answer:

10-20 percent

Explanation:

7 0
3 years ago
Read 2 more answers
What is Asynchronous learning?
vlada-n [284]
Asynchronous Learning is when each student works at their own pace, and may not collaborate on work in class meetings, so the correct answer here would be D!
7 0
3 years ago
Humans can hear echolocation of bats, as they try to find food in the night sky.
maw [93]

Answer: False

Explanation: This is FALSE because the bats make a high frequency  sound and we can't hear that type of sound.

3 0
3 years ago
Other questions:
  • Seed plant are found in environments where seedless plant are not
    13·1 answer
  • Which sectional planes of the body could show parts of both lungs and the heart?
    15·1 answer
  • Which of the following terms are used to indicate that cell membranes will allow only certain molecules to pass through without
    12·1 answer
  • A plant that grows in water
    11·2 answers
  • The green pigment in plant cells is called
    8·2 answers
  • For the strand of DNA listed below. write out the matching RNA strand.
    10·2 answers
  • Name the three white poisons which should be eliminated ( but I'm addicted to...):-P​
    15·1 answer
  • PLZZZZZ HELP MEH!!!!!
    10·2 answers
  • 28 The statements describe four different plants.
    15·1 answer
  • Are any factors in the equation of photosynthesis more critical for plants that live on land than for plants that live underwate
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!