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andre [41]
4 years ago
11

Does the universe ever stop ?

Physics
2 answers:
kenny6666 [7]4 years ago
8 0

We would only know that if we could see it.

So far, with the most sensitive astronomical instruments that have
been built, we don't see an end as far away as we can see. 

The farthest (dimmest) objects we can see are something like
13-1/2 billion light years away.


Vlad1618 [11]4 years ago
6 0
Nope. But nobody knows for sure. They haven't gone that far out. It could take billions of lightyears. 
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A soapbox derby is to be held on a frictionless hill with a 28 m vertical drop. The track is 300 m long. What is
ki77a [65]

Answer: -31039 J

Explanation:

5 0
3 years ago
The average kinetic energy of particles of matter is called
GenaCL600 [577]

Answer:

The answer is Temperature.

8 0
3 years ago
Melissa's hair stands up on end after she takes her wool hat off in the winter but not in the summer
Temka [501]

Answer:

Static electricity

Explanation:

A static reaction is transpiring with the surrounding air as well as her hair.

8 0
2 years ago
A flat uniform circular disk (radius = 2.00 m, mass= 100
ExtremeBDS [4]

Answer:

0.5 rad / s

Explanation:

Moment of inertia of the disk I₁ = 1/2 MR²

M is mass of the disc and R is radius

Putting the values in the formula

Moment of inertia of the disc  I₁  = 1/2 x 100 x 2 x 2

= 200 kgm²

Moment of inertia of man about the axis of rotation of disc

mass x( distance from axis )²

I₂  = 40 x 1.25²

= 62.5 kgm²

Let ω₁ and ω₂ be the angular speed of disc and man about the axis

ω₂ = tangential speed / radius of circular path

= 2 /1.25 rad / s

= 1.6 rad /s

ω₁ = ?

Applying conservation of angular moment ( no external torque is acting on the disc )

I₁ω₁ = I₂ω₂

200 X ω₁ = 62.5 X 1.6

ω₁ =  0.5 rad / s

7 0
3 years ago
Two objects are raised off the ground and one of them is three times as high as the other one. How do their potential energy com
DochEvi [55]

The potential energy of any object depends on its mass as well as its height off the ground.

Potential energy = mass x gravity x height.

We don't have enough information to compare the potential energies of these two objects because we don't know their masses.

3 0
4 years ago
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