8 Amazing science facts with expanations.

Index:

1. What does the Ice age mean?

2. How smooth is the surface of Earth?

3. How would you detect a gas cloud if it's not radiating light? 

4. Universe and Us.

5. Why do we have a magnetic field?

6. How could different phases of matter exist at the same time? Think about it.

7. How tides are formed?

8. Can we get the negative temperature on the absolute scale?

1. What does the Ice age mean? 

An ice age means that when water evaporates from the ocean and enters the clouds, it gets cold enough to move the clouds over land. It's not raining. It snows, it snows, and it stays. As a result, the water that rises from the sea does not return to the sea and accumulates on land. In the midst of this deposition, when they are strong and persistent, we call them glaciers. Glaciers are not snowfall itself. The compacted snow becomes a frozen river that slowly flows back into the ocean. But the ocean is being drained faster than it is replenished. In other words, during the Ice Age, sea levels are falling.

2. How smooth is the surface of Earth?

Are you aware that the surface of the globe, with all of its mountains, valleys, and hills, would be more uniformly smooth than any cue ball ever manufactured? Consider it.

Do you know,

Which portion of the crust of the Earth is the largest? Off the coast of the Philippines in the Pacific Ocean is the Marianas Trench. There are six miles of descent. The location where the earth's surface is the lowest.

The tip of K1 is the Earth's highest point.  K1 is the Himalayan Mountains. In Nepal. How high is that? It's about 5 miles up. The distance between the lowest point on the Earth's surface and the highest point on the Earth's surface is 11 miles. But even if we have an 8000-mile diameter, those two places are pretty far apart. If you were a cosmic giant who traveled up to it and ran your finger over it. The surface of Earth would feel as smooth as a cue ball to you.

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3. How would you detect a gas cloud if it's not radiating light?

 They do, in fact, emit radio waves, and someone has worked out what kind of radio waves they emit and why. He got knowledge about the atom's nucleus as a result of this. According to the nucleus's mass, he also found that the nucleus can resonate. This indicates that an atom will resonate slightly differently depending on where it is in the periodic table when subjected to the same electromagnetic field. Nucleus magnetic resonance is a brand-new physics phenomenon that he found. If you can tell one heavy atom from another, he would then ask a shrewd medical technologist. Let me use that to construct a machine. Put your body inside of it. I can then tell one tissue kind from another. The magnetic resonance imager, or MRI, was thus created. Possibly the most effective weapon in the arsenal of contemporary medicine.

4. Universe and Us.

It's a well-known fact that the human body is mostly made of water. The top elements in the human body are Hydrogen, Oxygen, Carbon, and Nitrogen. And the top elements of the universe are 

Hydrogen, Helium, Oxygen, Carbon, Nitrogen. Except for helium, every element is matching with what our body contains. We are no special in the universe at all. We are made of the same things as the universe is made of. And we can find from this that we're not living inside the universe but we're actually part of it. We're the universe ourselves. 

5. Why do we have a magnetic field? 

We have a magnetic field because our earth's core is Fluid. So molten thing in the center of Earth. Iron is the heaviest. When these elements were there, the heaviest elements fell to the center and the lightest elements went to the top surface. So molten iron is in the middle of the Earth. And Earth is spinning, remember. Also, we know that iron is magnetizable. So what's happening is magnetizable chargeable thing is moving with a spin of Earth. Result>

A dynamo is what you made when you have moving metal. And in a Dynamo, a Magnetic Field is essentially created from scratch. Because of this, chilled, ancient, dead planets lack magnetic fields. Mars has no magnetic field at all. So Because our core is fluid, we have a magnetic field. 

Must Read - Physics in everyday life question and explanations.

6. How could different phases of matter exist at the same time? Think about it.

What if we reduce the air pressure? We will of course get transition from ice to water. It'll remain as it is but then it will affect the boiling point of water. If we reduce air pressure it will decrease the boiling point. If we keep decreasing the air pressure, the boiling point will keep dropping. Let's say we are going from 40 degrees Celcius. We keep decreasing the air pressure. Going from 40 degrees to 20 to 10 to 0.01 degrees Celcius. Now, what happens? The water will evaporate and become steam. All that will happen at 0.01 degrees Celcius. So there's a unique combination of temperature and pressure at which ice, water, and steam will coexist or solid phase, liquid phase, and gaseous phase can all coexist in thermodynamic equilibrium.

7. How tides are formed?

Most people say the tides are high during a full moon, by the way, the tides are also high during a new moon but no one mentions it. They're equally as high as they are during a full moon. And low tides during a full moon are the lowest tides of the month. 

Like earth, the sun has tides on the earth also but they're like a third the strength of the moon's tides. Every day there are high tides and low tides. But at full moon, the high tide is higher and the low tide is lower than at any other time of the month. Same with the new moon. Because when you have a full moon the sun is exactly aligned with the earth's moon system. So the sun's tides add to the moon's tides. sun's tides give a little bit of a rise, that rise is added to the moon's rise and then you get extra high tides.

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8. Can we get the negative temperature on the absolute scale? 

We're of course talking about the absolute temperature scale. we're talking about zero kelvin where we could get there. In the third law of thermodynamics and quantum mechanics tells us we can't. If we could get there all motion would stop. So we're talking about negative temperatures.

Every time you use a laser pointer you're exploiting negative temperatures.

You might think but how can you go beyond having no motion at all that just makes no sense. Actually, it's all about how you define temperature. Basically the higher the temperature the more the jiggling. 

What happens is that the atoms and molecules, want to occupy the lowest energy state that's where you find the greatest probability of finding them. What's the probability of finding the atoms or molecules in those. It's a really simple equation 

 P(probability) proportional to exp(-dE/KT).

dE is the difference between energy levels. 

k is Boltzmann's constant.

and T is temperature.

 But if you can engineer a system whereby you have many more atoms and molecules in the higher energy level than in the lower energy and you keep going up so you have more molecules.

In terms of negative temperatures, make that T negative and negative cancel out in the equation.

P(probability) proportional to exp(+dE/KT).

Probability is increasing as you go up and up. 

What I really want to get across is that we haven't gone through zero. We have not got to zero kelvin which is still Louboutin in terms of the laws of thermodynamics and quantum mechanics.

The way a laser works, it effectively exploits a negative temperature. This is called a population inversion and what happens is that electrons fall down from a higher level to a lower level and they give out a photon and that's that population inversion.

Negative temperatures are actually hot. It's hot in the sense that if you have a normal temperature object and you bring a negative temperature object, heat will flow from negative to positive here. 

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