Unfold Answers

Key Answers to All Inquisitive Minds! 

[unfoldanswers]

What is Specific Gravity? What is the Specific Gravity of Water?

When we go out in the summer to enjoy the pools and rivers, we must constantly double-check that all of our equipment and safety precautions are in place and operational.

When we go to the river and board our boats, we make sure there are no leaks and that we are wearing our life jackets. We make sure that young children who are still learning to swim have their floaters on or swim with them in a swim ring to ensure that they do not sink.

Why do both boats and swimming rings float?

Read Here

[unfoldanswers]

Shocking and Amazing Physics Facts

Physics delivers the facts; facts that are logical, unbiased, and without being agitated by our personal prejudice. Some of these facts are so amazing that we thought of listing them in our list of amazing physics facts.

Check out the Facts

[unfoldanswers]

10 Strongest Material in the World

Strength means an ability to withstand stress. A material is termed as strong if it can withstand a large value of stress without getting fractured. Recent developments in material science have introduced amazing materials which have a large value of tensile strength. Some are very light hence their strength-to-weight ratios are very good and can surpass Kevlar and even diamond. So here is our list of 10 strongest materials.

10. Palladium Alloy Glass

9. Ultra-High-Molecular-Weight Polyethylene (UHMWPE)

8. Limpet Teeth

7. Zylon

6. Moissanite

5. Diamond

4. Wurtzite Boron Nitride (w-BN)

3. Lonsdaleite

2. Carbon Nanotube Paper  (Bucky Paper)

1. Graphene

[unfoldanswers]

Why is gold rare?

Gold is not the rarest but a rare metal. But, why is gold rare? Its rarity along with its noble nature has made it expensive. Apart from this, it is widely used in jewelry because of its malleability i.e. a single gram of gold can have a meter square wide sheet.

These properties make gold expensive. Had it not been rare, it might not have been so expensive. In order to discern the cause of its rarity, let us first know what makes things rare?

Read Full Article

[unfoldanswers]

Unsolved Space Mysteries Only Few People Know

Many things are around us, and we still know very little about them. Space is far, big, and mysterious. Think about all the things you know about space and the existence of life and the galaxy; it’s all a hypothesis.

There is always logic to support those hypotheses, but there is no hard evidence, and it is highly unlikely that we will ever know what really happened. Having said that, that hypothesis has at least some explanation and a few shreds of evidence as well.

Real Full Article

[unfoldanswers]

What is an Oxidizing Agent?

An oxidizing agent is a chemical or element that receives electrons from a different species as part of a redox (oxidation-reduction) reaction.

An oxidant is a chemical compound that easily transfers oxygen or other atoms in order to get an electron. An oxidizer is a component of a process that releases oxygen or acquires electrons or hydrogen. As it absorbs electrons, the oxidizer is decreased. The reactant, on the other hand, is oxidized by allowing its electrons to be acquired by the oxidizer. Oxygen is the eponymous example of an oxidizing agent.

Read Full Article

[unfoldanswers]

Security Risk of Quantum Supremacy And Solutions

Researchers at Google have officially published their paper on achieving quantum supremacy. Since quantum computers can deduce security keys in use today in short span of time, a question arises – Does quantum supremacy pose a security risk?

Security Risk of Quantum Supremacy

Quantum computers are faster to solve some particular complex problems which are literally unsolvable for classical computers. Also, they can easily search data in a short time (short in quadratic order). This is what makes them superior to the classical ones. And this superiority can increase the risk in some particular confidentiality required sectors as banking.

Apart from banking data has been valuable in this modern period of information technology. The safety of data is equally essential. Modern codes are developed by mathematical formulations, and with the advancement of problem-solving technologies, they can easily be decoded.

Quantum computers can decipher the most complex mathematical cyphers in a matter of minutes or hours. If you have to check ‘N’ numbers it will have to check root over ‘N’ times whereas a classical computer has to check exactly ‘N’ times. This will decrease time exponentially when ‘N’ is large.

The tedious calculations to figure out the security keys is rather too long for modern classical devices that it takes the fastest classical computers many years to figure it out. But quantum computers can have a great advantage of time and can generate the key faster. This can pose a risk to the confidential documents as well as money.

[unfoldanswers]

Truth About Quantum Supremacy . Is it Achieved?

Quantum supremacy is a stage at which the quantum computers can solve the problems which classical computers literally cannot and can be used to solve such variety of problems that we encounter in life science. This can lead the study of quantum phenomena to another level since quantum computing works with the same quantum properties.

These computers work on the basis of qubits and quantum algorithms in a quantum processor. Since quantum computing is a new form of technology, it can lead to solving particular problems conveniently. But using it for normal purpose is the hurdle today.

Classical computers are based on binary logic which encompasses the mobile phones to the sophisticated supercomputers. There are certain probabilistic computations like finding the ground state of caffeine molecule, which cannot be solved by the most powerful supercomputers in existence.

Surpassing these computer’s ability is actually quantum supremacy. Thus it requires a quantum computer which can do what classical computers can and solves most sophisticated problems which classical computers cannot. This multipurpose quantum device is being sought by researchers at IBM and Google but has not yet officially been released.

[unfoldanswers]

Quantum Levitation – Advancing Towards Levitating Vehicles

Star Wars, Back to Future and other futuristic movies had this really spiffy concept of the levitated(float in the air) vehicles. Is it possible? A quantum phenomena called quantum levitation might one day lead us to such levitating vehicles.

Lexus made a hoverboard using this technology and featured in a commercial. This technique is different from the operational Maglev trains which operates by the use of electromagnets or superconducting magnets because it use superconductors and their purely quantum properties.

What’s a Superconductor?

A superconductor is a material which does not resist the flow of electricity through it. Even the copper wires heat when large current flows through it (during short circuit) due to their small electricity resisting property. But superconductor has no resistance and a current set up in a superconductor lasts forever without dissipating theoretically.

There are two types of superconductors, type – I and type – II. Type -I does not allow magnetic field lines (flux) through it while the next one does at high magnetic field. The levitation uses type – II superconductors since it requires flux to be passed in order to lock the object and move.

[unfoldanswers]

Is Perpetual Motion Machine Possible?

Perpetual motion machine means a machine that moves for indefinite time and gives us output work. Who would not imagine such machines, like a car to which you don’t need to add gas? Can we build such machines that can do continuous work without the addition of fuel (energy input)?

Perpetual motion

Newton’s first law states that “Every body continues in its state of rest or uniform motion unless an external force acts upon it.” This means that a body in motion will be in perpetual motion if it is not acted upon by some force that can cease its motion. Thus, if there is no force acting on a moving object, it remains perpetually in motion.

Newton’s statement is amicable with our topic of discussion, perpetual motion. But, it’s not experienced in our daily life because we cannot have a completely force (against the motion) free environment in the world. Friction appears within object- medium interface, as the motion is on a medium when we are on Earth.

Space is completely different realm. Still, an object in space is acted upon by gravity if no other forces. Also, energy transfer can be seen even in the heavenly bodies whose motion seems perpetual, which tends to oppose its motion.

If the force applied is constant, relativity implies that the laws of physics are not affected. So constant force systems are equivalent to no force systems on the basis of physics. But energy transfer in the form of different radiations or tides is inevitable.

So, Perpetual motion is however not experienced with the presence of such losses and resisting forces. Even Earth is slowing down at a very slow rate, everything is.

Read Full Article

[unfoldanswers]

Can Quantum Computers Replace Modern Computers?

Quantum computers are computing device that rely on quantum physics for computation.

But does that mean the modern computers is going to be obsolete soon?

Quantum Computers works on the basis of quantum computing and can solve some particular problems that a modern supercomputer takes days or months in some hours or minutes. This idea provokes a question – can quantum computers replace modern computers?

[unfoldanswers]

Quantum World & The Weird Reality That Lies Within

We hear the word quantum or quantum world very often. If it’s not in the context of physics or science, it’s somewhere else. The movie ‘quantum of solace’ or ‘quantum dot display’ in television can be a good example.

This word ‘quantum’ readily makes a phrase amazing – quantum teleportation, quantum encryption, quantum dot display, quantum computing and quantum logic to name some. So whats the real meaning of this word quantum and its world, quantum world?

[unfoldanswers]

Insight to Quantum computing and Qubits

Quantum computing is the computing process which is based completely upon quantum laws and is carried out by quantum phenomena. Despite our lack of complete control over the quantum phenomena, this thing has created a great fuss in modern community.

In this article, I attempt to provide an insight to quantum computing starting from computing, leaving the practicality aside.

[unfoldanswers]

What is the blackest material on Earth?

The blackest material on Earth should have no color at all since black is no color. Black is the extent of not seeing an object! A thing which reflects no light or minimum light by absorbing almost all of it appears black. So an absolutely black material should reflect no light (a perfect black body) and we don’t see the absolutely black object. What is the blackest material on Earth?

[unfoldanswers]

What is the color of the moon? – The reason behind colored moon

What is the colour of the moon? If you look at the moon, it appears mostly white or yellow, sometimes blue and sometimes red. Does the moon really change colours or it has definite colours?

[unfoldanswers]

Which one is safer, a helicopter or an airplane?

When it comes to air transport or any transportation, safety comes first. Air transport safety is well scrutinized than any others before the operation. May be its because we are terrestrial and aviation is something unusual for us.

The major air transport means are of two kinds – helicopter and airplane. Both of them are different in terms of both the principle of flying and shapes. So one must be much safer than the other. Then, which one is safer, a helicopter or an airplane?

[unfoldanswers]

How fast is 5G going to be? Everything you need to know about 5G explained.

Whenever there is a discussion about 5G, there is a question that pops up invariably,

“How fast is 5G going to be?”

That is understandable because all the previous upgrades (2G, 3G & 4G) had mostly to do with the speed of the internet. However, it’s much more than the speed this time around. But if we have to talk about the speed, the fifth generation of mobile networks is actually going to be more than what ‘fast’ means to you.