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tangare [24]
3 years ago
14

What is Hubbles Law?​

Physics
2 answers:
Whitepunk [10]3 years ago
8 0

Answer:

Explanation:

Hubble's law is considered the first observational basis for the expansion of the universe and today serves as one of the pieces of evidence most often cited in support of the Big Bang model.The motion of astronomical objects due solely to this expansion is known as the Hubble flow.

STALIN [3.7K]3 years ago
4 0

Explanation: Hubble was a person but they named a satellite that they sent out into outer space after him. He discovered that the galaxies that are the furthest away are moving the fastest away from us and the galaxies that are closer to us are moving at a slower rate.

So that is Hubble's law. Hubble's law is a mathematical thing that you can do if you take higher level astronomy. There is a mathematical relationship that you can figure out which is the the further away something is the faster it's moving away.

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The breaking car had 10,000 J of kinetic energy before breaking after breaking it had 2000 J of kinetic energy. How much thermal
WINSTONCH [101]

Answer:

8000J

Explanation:

The kinetic energy of the car lost during breaking are converted to thermal energy and are gained by the brakes.

Kinetic energy loss by car = thermal energy gained by brakes.

∆K.E = ∆T.E ....1

The Kinetic energy loss by car can be expressed as;

∆K.E = K.E1 - K.E2

Initial K.E = K.E1 = 10000J

Final K.E = K.E2 = 2000J

∆K.E= 10000J - 2000J = 8000J

From equation 1,

∆K.E = ∆T.E

∆T.E = 8,000J

thermal energy gain by brakes = 8,000J

8 0
3 years ago
Ahsoka pulls a wounded soldier (mass 64 kg) across the ground with a force 18 Newtons. If they have an acceleration of 1.5 m/s2
Kryger [21]

Answer:

0.124

Explanation:

18-(9.81*64)*k=64*1.5

4 0
2 years ago
Read 2 more answers
You have a mass of 60-kg, and you are facing your friend who has a mass of 100 kg. You skate towards
White raven [17]

Answer: My initial velocity is 5 m/s.

Explanation:

In this case, momentum can be conserved.

initial momentum = final momentum

Since both the bodies come to rest after collision,

Final momentum = 0

Let my velocity be v, and mass, m1 = 60 kg

Friend's mass, m2 = 100 kg

Friend's velocity, v2 = 3 m/s

Intial momentum = m1v + m2v2

= 60v + 300

Conserving momentum,

60v + 300 = 0

v= -5 m/s

( Negative sign indicates that me and my friend are moving in opposite directions that is towards each other)

4 0
3 years ago
Phosphorus bursts into flame when exposed to oxygen. What element might be used when storing pure phosphorus to keep it from rea
bekas [8.4K]
<h3><u>Answer;</u></h3>

Argon

<h3><u>Explanation;</u></h3>
  • Phosphorus is an element found in group 15 of the periodic table, it is one of the element that belongs to nitrogen family.
  • The element phosphorus exhibits allotrophy, namely; white phosphorus, red phosphorus and black phosphorus.
  • <u>Phosphorus, particularly the white phosphorus combines with oxygen so easily that it catches fire automatically. Thus, as a safety precaution, white phosphorus is stored under water in laboratories. </u>
  • <u>It may be also stored in argon, since argon is an inert element which belongs to the noble gases group.</u>

4 0
3 years ago
Read 2 more answers
When viewing an object, we see its color according to the wavelength of light that the object A. absorbs. B. transmits. C. conta
max2010maxim [7]

D. Reflects

The object absorbs the rest of the color spectrum

7 0
3 years ago
Read 2 more answers
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