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
babunello [35]
3 years ago
14

What do we mean by the observable universe?

Physics
1 answer:
mote1985 [20]3 years ago
4 0
The observable universe<span> is a spherical region of the </span>Universe, <span>comprising all matter that can be observed from Earth at the present time, because light and other signals from these objects have had time to reach Earth since the beginning of the cosmological expansion.


</span>
You might be interested in
A piece of transparent material that is used to focus light and form a image
Soloha48 [4]

Convex Lenses are used to focus light and form a image. They are transparent.

They are one type of lenses. Different type of lenses are used to focus light differently. The basic lenses are concave and convex. Convex lenses converge light falling on it whereas concave lenses diverge light falling on it.

4 0
3 years ago
Read 2 more answers
The cardiovascular system consists of
guapka [62]
Consists of A. good luck
3 0
3 years ago
How many watt hours will 3-155amp hour 12 volt batteries wired in a parallel configuration produce?
Ede4ka [16]

Answer:

B 5580 W•hr

Explanation:

A Watt is a Volt times an Amp

3(12 V(155 A•hr)) = 5580 W•hr

4 0
2 years ago
A 20-kg child is tossed up into the air by her parent. The child is 2 meters off the ground traveling 5 m/s.
nignag [31]
The kinetic energy (KE) is 250 J and the gravitational potential energy (GPE) is 392 J
4 0
3 years ago
Determine the Mutual Inductance per unit length between two long solenoids, one inside the other, whose radii are r1 and r2 (r2
Triss [41]

Answer:

M' = μ₀n₁n₂πr₂²

Explanation:

Since r₂ < r₁ the mutual inductance M = N₂Ф₂₁/i₁ where N₂ = number of turns of solenoid 2 = n₂l where n₂ = number of turns per unit length of solenoid 2 and l = length of solenoid, Ф₂₁ = flux in solenoid 2 due to magnetic field in solenoid 1 = B₁A₂ where B₁ = magnetic field due to solenoid 1 = μ₀n₁i₁ where μ₀ = permeability of free space, n₁ = number of turns per unit length of solenoid 1 and i₁ = current in solenoid 1. A₂ = area of solenoid 2 = πr₂² where r₂ = radius of solenoid 2.

So, M = N₂Ф₂₁/i₁

substituting the values of the variables into the equation, we have

M = N₂Ф₂₁/i₁

M = N₂B₁A₂/i₁

M = n₂lμ₀n₁i₁πr₂²/i₁

M = lμ₀n₁n₂πr₂²

So, the mutual inductance per unit length is M' = M/l = μ₀n₁n₂πr₂²

M' = μ₀n₁n₂πr₂²

3 0
2 years ago
Other questions:
  • A driver traveling 50 mph rounds a bend and sees a car stopped 40 yards (36.576 m) ahead. Assumethe following: the road is flat
    13·1 answer
  • In astronomy, the term perihelion refers to the point in the orbit of an asteroid, comet, or planet when it is closest to the su
    15·1 answer
  • The nonmetals include which of the following groups? Use the periodic table to answer the question. Check all that apply. haloge
    8·1 answer
  • If the electric field between the plates has a magnitude of 1.4×105 V/m , what is the potential difference between the plates?
    5·1 answer
  • According to Newton’s first law of motion, when will an object at rest begin to move?
    12·1 answer
  • What purpose does a generator serve in a power plant?
    15·1 answer
  • A 20 kg crate initially at rest on a horizontal floor requires a 80 N horizontal force to set it in motion. Find the coefficient
    6·1 answer
  • What are factor affecting resistance?​
    9·1 answer
  • Why did the model spacecraft go so much faster than expected on Wednesday?
    6·1 answer
  • Suppose a large housefly 3.0 m away from you makes sound with an intensity level of 40.0 dB. What would be the sound intensity l
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!