What are the common problems that international students face while travelling abroad for studies?

New germs. You’ll be exposed to new bacteria and viruses, often while jetlagged or adapting to a new climate. In my first year of study abroad I had a cold for three months.

Bureaucratic nonsense. Foreign universities function in ways that aren’t always documented — you’re expected to just know how the processes work.

Culture shock. At some point you’ll miss all the familiarity of home, including family, friends, and comfort foods.

Are Italians trustworthy?

Contrary to other opinions on this matter, I think your question has some validity. Of course it’s true that “Italians” means essentially nothing unless specified to mean Italians of nationality, blood line, language/culture, or some other criterion. Still, I think I may have an idea where you’re coming from with this question. I will confine my remarks to addressing only people of Italian culture, language and ethnicity, living in Italy in the present day.

As John Hooper pointed out so eloquently in his recent book “Italians,” modern Italy generally views people — all people — as belonging to one of two groups: “furbo” or “fesso.” Furbo means “clever” but also carries connotations of being sly and underhanded in most contexts; fesso means “sucker.” This isn’t how we see things in most modern countries, outside the crime-ridden areas of town anyway. Not surprisingly, Italy is crime-ridden.

It should be pointed out that within modern Italian culture, a blame-the-victim mentality is pervasive. If you buy a household appliance online and it never arrives, that was your fault, not the furbo who used a website to shake people out of their money illegally. He is a sort of protected species, as are the law enforcement entities who should apprehend him but probably won’t. You are not a protected species — as a victim of white collar crime, you are a laughing stock.

With this pervasive mentality, one can easily imagine how it would trickle into society and influence how young people construct their own version of the world they live in, so that they can profitably participate in it. In a society which rewards clever dishonesty and laughs at honesty as if it were a sign of total stupidity, you have lawyers and judges, police and politicians, civil servants and even teachers who display a kind of apathy and indifference toward what we might call in other societies a “moral compass.” It’s easy enough to illustrate this right now: two-thirds of the United States finds Donald Trump totally appalling, wants him removed from office, and a special prosecutor is working full-time on making that a reality. In Italy under its own “Trump,” Silvio Berlusconi, a much smaller portion of the population felt that way. There was never a special prosecutor, “midnight laws” were passed dozens of times to render illegal the evidence which would have jailed him, and there were even sitting parliamentarians who moonlighted as Berlusconi’s own defense lawyers but did not recuse themselves from parliamentary votes to grant their client — the Prime Minister — immunity. Italians either rolled their eyes or, more often, did not see any problem. Berlusconi dominated Italy’s political landscape from 1994 to 2011, and even in his advanced years he’s recently staged a political comeback .

On paper, Italy is a democracy and its lax law enforcement plus endemic corruption represent the will of the people; however, there is evidence that if the government were to clean up, so would the people. It’s a bit of a chicken-and-egg problem, and difficult to gauge the best course of action. The Catholic Church claims to be the supreme moral authority in Italy, yet corrupts itself with one scandal after another. As this happens, the moral compass of many everyday Italians spins interminably while that of many others does not, because they are guided by an internal and innate sense of morality, not one which weathervanes with Church and State norms.

So the best answer I can give to your question is “some yes, some no.” Just like everywhere.

Why is light always in motion?

Ok, assuming that this question is being asked by a high school student, to talk about light, you must know about relativity and quantum mechanics.

According to theory of relativity, there is not absolute motion in universe. Every motion in this universe is relative. This theory is based on the fact that there is no experiment that can distinguish between a stationary object and an object moving with constant velocity. If you are a in a spaceship, and you see an asteroid approaching you, it may be possible that it is not the asteroid that is approaching you but it is your spaceship which is moving towards the asteroid

The earth which seems to be stationary is actually revolving around sun and rotating on its own axis in our solar system. But don’t think for a moment that our solar system is stationary. All the celestial bodies in Milkyway, including our solar system is orbiting around the Milkyway’s center, which is the reason behind spiral figure of our galaxy. But then, our own Milkyway is approaching towards another galaxy called Andromeda ( Or you may say Andromeda is approaching us, it means the same thing ). And finally comes the expanding universe, according to which everything in this universe is moving away from each other, based on Hubble’s Law. So there is no way you can ever tell if something is absolutely in motion or not

Now lets talk about light. The unique thing about light is that it is moving with respect to everyone with same speed ( around 300,000,000 meters/second). If you light a torch while sitting in a supersonic jet in the direction of motion and then light it sitting on your room. In both cases, the speed of light will be unchanged (which according to newton’s laws is invalid ). This unique property of light was the basis of Eisenstein's theory of relativity.

Coming to your question, according to quantum physics light is composed of tiny particles know as photons. These photons have zero ‘rest mass’ (mass of an object when it is not motion w.r.t you). So classically, they must have zero momentum ( as [math]m = 0[/math] implies [math]m*c = 0 [/math]) (c = speed of light). But this is outlawed by relativity and quantum mechanics. A single photon do carry momentum which is equal to [math]\frac{hc}{L} [/math] where h = Plank’s constant, L = wavelength of light. This formula is result of Quantum Physics and relativity. So one simple reason why light appears to be always in motion is that it carries momentum. So long as no one obstructs its path and extracts its momentum, it will keep moving on, according to conservation of momentum.

But there are even more plausible explanations regarding nature of light which as I said earlier, are heavily based on Quantum Physics and Relativity. One of them is the the Spacetime fabric, which says that space and time are bound together in a continuum. Light do nothing but simple follow the path of this continuum.

For further read, refer to Wikipedia, or just read last Chapter of HC Verma Part II . Believe me its a very interesting read

Did the International Criminal Court ever lay charges against Ayatollah Khomeini for the use of child soldiers in the Iran/Iraq war?

Those teenagers went to the war volunteerly, often without the permission of their parents. Nobody forced them. Teenagers usually tricked their parents for going to the war, many of them escaped from their homes and joined the armed forces. As Parisa said, because of their young age, the army initially didn’t recruit them, but they still wanted to fight the Iraqi Ba’thists, so they went to the front with bare hands, and the army had no choice other than giving them a weapon. Teenagers are arrogant and when they decide to do something, you can’t stop them.

My uncle was one of those so-called child soldiers. He suddenly disappeared, and days later we found out that he went to the front. He became a prisoner of war, and Saddam severely tortured him for more than 19 months. He finally was freed during a prisoner exchange. Prior to his freedom, the authorities gave us this photo and asked if we can recognize him

Certainly we were unable because as you see, he is looking downward. Those days were very hard for us, specially for his parents. When he finally reached home, our neighbors sacrificed 24 sheeps and two cows.

My father also fought in the war, though he wasn’t a child soldiers (he was 30+ by then). Here is one of his photos (the person behind the machine-gun):

That war was a holy defense for us. It’s funny that nowadays some Americans like the person who asked this question are trying to play the role of angels and claim that they want to “bring democracy to poor Iranians”. Where have you been when Saddam was dropping chemical bombs on Iranian civilians? Aha, you were busy giving him the chemical bombs. More than 100,000 Iranians were killed by those chemical bombs, and the only thing the Americans and the rest of the world did was encouraging Saddam to drop more chemical bombs. The Americans, or more correctly, the world (with some notable exceptions like Syrians, whom we are thankful forever) strongly supported Saddam during that war, the world did everything to bring us to our kneels, but we were not defeated, we didn’t lose a single inch of our soil. Apparently this hurtful fact is burning some people as Harry Haller rightly said in his answer.

Don’t pay attention to the answers by Saudis and some Americans, who are saying something other then what I mentioned in my answer. Thanks, but we do not want American and Saudi democracy. You already brought your democracy to Afghanistan, Iraq, Libya, Syria and Yemen. That’s enough.

How to know if you have bone spurs

Bone spurs don't generally cause symptoms. Numerous individuals have bone goads however don't have any acquaintance with it. Be that as it may, if bone goads rub against different bones or adjacent delicate tissues they can bring about torment or a loss of ordinary movement in a joint. This is most regular in the hips, knees, shoulders, hands and feet.
If the bone goads rub against tendons or ligaments they can bring about torment or a tear. This is normal in the shoulder and can prompt a rotator sleeve tear.

If bone spur happen in the spine, they can bring about torment and loss of movement, however they can likewise squeeze the nerves or spinal rope. At the point when nerves in the spine are squeezed, it is known as radiculopathy. It can bring about torment, deadness, shivering, or shortcoming in the arms or legs. If the spinal rope is compacted, it is called myelopathy. This can bring about issues with offset, shortcoming, and agony.

What is the derivative of [math]y = \sin^{\cos x} x[/math]?

Use a method called logarithmic differentiation to solve this problem, to make computations easier. First, take the logarithm of both sides, and go from there:

[math]\displaystyle y = {\sin}^{\cos(x)}{x}[/math]

[math]\displaystyle \ln(y) = \ln({\sin}^{\cos(x)}(x))[/math]

[math]\displaystyle \ln(y) = \cos(x)\ln(\sin(x))[/math]

Now, differentiate both sides, using implicit differentiation on the LHS and product/chain rules on the RHS:

[math]\displaystyle \dfrac{y’}{y} = -\sin(x) \cdot \ln(\sin(x)) + \cos(x) \cdot \dfrac{1}{\sin(x)} \cdot \cos(x)[/math]

[math]\displaystyle \dfrac{y’}{y} = \cos(x)\cot(x) – \sin(x)\ln(\sin(x))[/math]

[math]\displaystyle y’ = y\left(\cos(x)\cot(x) – \sin(x)\ln(\sin(x))\right)[/math]

[math]\displaystyle y’ = {\sin}^{\cos(x)}{x}\left(\cos(x)\cot(x) – \sin(x)\ln(\sin(x))\right)[/math]

I hope this helps.

How powerful is a million nuclear blasts and what could it achieve destruction wise?

“nuclear blasts” vary greatly in size and destructive power. A small “tactical” nuclear warhead may yeild “only” the equivalent of 20 tons of TNT, for instance.

A typical Cold-War-era “Strategic” warhead may have had a yeild of 20 “megatons” or 20 million tons of TNT equivalent.

So you’d have to specify the size of the weapon you’d like to be talking about, and then multiply.

Where do you go when you want to find solitude?

Even in the midst of company, one can find solitude simply by venturing deep into what I call an “electronic square” – T.V, computer, smartphone and the like, with a pair of headphones. Yes, I believe that today, if one wishes to be alone even in a public place such as a street, park or a restaurant, two necessary items are an electronic device and headphones. That way, one can be alone anywhere he/she may go, as long as the batteries are at a sufficient capacity. With the power of the internet and the “smart” technology, we became a population of hermits and loners. I doubt there is truly need to go into the wilderness in order to find solitude, given the devices available for optimal detachment from the various social and external distractions.

When I want to be alone, regardless of the people around me and the environment (unless under special conditions such as in a test or in a lesson), I am equipped any time with my smartphone and headphones in case I wish to seclude myself, and I always make sure my phone is fully recharged, along with my bluetooth headphones. Nothing else is truly needed for one to become a hermit in our times, which may be more and more solitary in the future, more than they are currently, I believe.