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
katrin2010 [14]
3 years ago
10

What was the physical principle used by edwin hubble to demonstrate that the "spiral nebulae" are very distant and large?

Physics
1 answer:
alekssr [168]3 years ago
4 0
<span>The physical principle used by Edwin Hubble to demonstrate that the "spiral nebulae" are very distant and large was the inverse-square law of light. The Cepheid variable stars in the spiral nebulae obey a period-luminosity relation; by measuring the period of a Cepheid star, its average luminosity can be determined, and then, by comparing this with its average apparent brightness, its distance can be calculated.</span>
You might be interested in
While brayden is traveling along a straight interstate highway, he notices that the mile marker reads 260. Brayden travels until
Yuki888 [10]

Answer:

<em>displacement = -85 miles</em>

Explanation:

<u>Displacement </u>

It's a magnitude used to measure the linear space between two points. It's computed as the subtraction of the final position minus the initial position which results in a vector. Notice the displacement only depends on the initial and final positions and not on the path the object has traveled.

Brayden starts to measure his position when the mile marker reads 260. Then he travels to the 150-mile marker and goes back to the 175-mile marker, his final position. As mentioned, the displacement only depends on the relative positions, so

displacement = 175 - 260 = -85 miles

5 0
4 years ago
Positive psychologists believe that happiness can be increased by
Elenna [48]
The answer is positive thoughts
5 0
3 years ago
Read 2 more answers
Which of the following is the best name for a compound made from calcium and bromine? (CaBr2) calcium bromide calcium dibromide
8_murik_8 [283]

By definition, we have to:

Calcium Bromide is an inorganic salt formed by granular white crystals that responds to the formula CaBr2.

Calcium bromide has no odor, is colorless and has a bitter taste.

It is obtained by adding Hydrobromic Acid to Calcium Oxide, Calcium Carbonate or Calcium Hydroxide.

The substance that results is then subjected to a crystallization process, which involves evaporating the water.

From here, you get then:

CaBr2.

Answer:

CaBr2 = Calcium bromide.

6 0
3 years ago
Read 2 more answers
A ray at which angle would produce the most glare? A. 59 degrees C. 25 degrees D. 37 degrees
Mkey [24]
<span>A. 59 degrees......
Hope it works</span>
5 0
3 years ago
Read 2 more answers
What is the relationship between height of high tide and height of low tide for any location? ( Small answer please :) ! )
Lera25 [3.4K]

Answer:

Tides are very long-period waves that move through the oceans in response to the forces exerted by the moon and sun. They originate in the oceans and progress toward the coastlines where they appear as the regular rise and fall of the sea surface. When the highest part or crest of the wave reaches a particular location, high tide occurs; low tide corresponds to the lowest part of the wave, or its trough. The difference in height between the high tide and the low tide is called the tidal range. Tidal range is the height difference between high tide and low tide.

7 0
3 years ago
Other questions:
  • A furlong is 220 yd. A fortnight is 2 weeks. Convert a speed of one furlong per fortnight to millimeters per second.
    7·1 answer
  • What is the speed of an electron traveling 32 cm in 2 ns?
    5·1 answer
  • PLZ HELP ME GUYS!!!! Using appropriate terminology, contrast transverse and longitudinal waves. Hint: How are they different? Yo
    14·1 answer
  • A ball is launched with initial speed v from the ground level up a frictionless hill. The hill becomes steeper as the ball slide
    11·1 answer
  • A circular loop of wire with ra dius 8.0 cm carries a current of 0.20 A. A vec- tor of unit length and parallel to the dipole mo
    5·1 answer
  • dentro de cada rama de deportes que existen se debe mantene normas que hacen al atleta cada día ser mejor.¿ Cuales son esas norm
    11·1 answer
  • What happens to all light bulbs in a series circuit when one burns out? How would the situation change when the lights are hooke
    10·1 answer
  • What are the uses of a magnet?
    7·2 answers
  • Which lists imaging techniques that use wave behaviors in order of increased risk of cancer from least risk to greatest
    10·1 answer
  • Molecules can be made up of two atoms of the same element;
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!