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lianna [129]
1 year ago
5

Out of all the mass and energy in the universe, ordinary matter (the stuff that makes up stars and gas, and all the things we in

teract with in everyday life) constitutes about
Physics
1 answer:
MrMuchimi1 year ago
5 0

Answer:

About 5 % of the universe is visible.

Estimates are that 68 % of the universe consists of "dark energy" and 27% of the universe consists of "dark matter". Currently 95 % of the universe is not currently visible to the scientists involved (cannot be explained by means that we know).

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You are pulling a suitcase through the airport at a constant speed by exerting a force of 28.0 N at an angle 30.0° from the hori
forsale [732]

The force of friction that is acting on the suitcase is the force that opposes the motion of the suitcase.

<h3>What is friction?</h3>

The force that resists the motion between two bodies in contact. There are some materials that reduces friction such as oil in a car engine reduces friction. In this example, friction creates between the motion of suitcase and with the ground.

So we can conclude that the force of friction that is acting on the suitcase is the force that opposes the motion of the suitcase.

Learn more about force here: brainly.com/question/12970081

#SPJ1

8 0
1 year ago
Mr. and Mrs. miller both have blue eyes. Could any of their children be born with brown eyes? Circle yes or no. And what rule an
mrs_skeptik [129]
Yes, because they children also will have blue eyes because every each single childrean will follow their parents
4 0
2 years ago
Read 2 more answers
in metals, the properties of malleability and ductility are explained by the fact that metallic atoms can roll past metallic bon
creativ13 [48]

Answer: Option (b) is the correct answer.

Explanation:

Metals are malleable and ductile, that means, metals can be beaten into thin sheets and they can be drawn into thin wires.  

While showing the property of malleability and ductility, the bonds between metals did not break as there is only change in the shape of metal.

Thus, we can conclude that out of the given options, in metals, the properties of malleability and ductility are explained by the fact that metallic atoms can roll over without breaking their bonds.

7 0
3 years ago
Read 2 more answers
What natural product is plastic made from?
forsale [732]

Answer:

cellulose, coal, natural gas, salt and crude oil

Explanation:

6 0
3 years ago
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Bert strikes a cue ball of mass 0.17 kg, giving it a velocity of 3 m/s in the x-direction. When the cue ball strikes the eight b
Anuta_ua [19.1K]

Answer:

The velocity of the cue ball after collision is -2.13 m/s and the velocity of the eight ball after collision is 2.06 m/s

Explanation:

Let m₁ = mass of cue ball = 0.17 kg, m₂ = mass of eight ball = 0.16 kg, v₁ = initial speed of cue ball = 3 m/s, v₂ = initial speed of eight ball = 0 (since it is initially at rest), v₃ = final speed of cue ball, v₄ = final speed of eight ball.

Since the cue ball and eight ball are deflected at an angle to the horizontal, we resolve their final velocity into its components in the x and y direction and then apply it to the law of conservation of momentum.

From the law of conservation of momentum,

In the x- direction

m₁v₁ + m₂v₂ = -m₁v₃cos40 + m₂v₄cos45 (the third quantity is negative since the cue ball moves 40° in the opposite direction)

0.17 × 3 = -0.17v₃cos40 + 0.16v₄cos45

0.51 = -0.130v₃ + 0.113v₄

-0.130v₃ + 0.113v₄ = 0.51 (1)

In the y - direction

0 = m₁v₃sin40 + m₂v₄sin45  (since our initial momentum in the y-direction is zero)

m₁v₃sin40 = -m₂v₄sin45

0.17v₃sin40 = -0.16v₄sin45

0.1093v₃ = -0.113v₄  

v₄ = -0.1093v₃/0.113  (2)

Substituting (2) into (1), we have

-0.130v₃ + 0.113 × -0.1093v₃/0.113  = 0.51

-0.130v₃ -0.1093v₃ = 0.51

-0.239v₃ = 0.51

v₃ = 0.51/-0.239 = -2.134 m/s ≅ -2.13 m/s

Substituting v₃ into (2), we have

v₄ = -0.1093(-2.134)/0.113 = 2.064 m/s ≅ 2.06 m/s

So, the velocity of the cue ball after collision is -2.13 m/s and the velocity of the eight ball after collision is 2.06 m/s

8 0
2 years ago
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