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Questions answered by Mr Joseph Vempeny  India   (Expert Rank: 2831) Member has an expert rating of 100+
 

Can nonliving things come alive? If no, then why doesn't it happen the same in the case of a virus?

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Question found in Biology
Virus is very special case that cannot be classified either as living or non-living.
For an organism to be living, it should have DNA as well as RNA molecules in it. A virus has either DNA or RNA, not both. So it is not a living being. But since it has either DNA or RNA it can become alive if the missing molecule is added. This happens when the virus attaches itself to a living cell.

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Can anyone explain in detail that how did Einstein defined time as? And how did he verified his theory?

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Question found in Science In General
Einstein or any other scientist haven't defined time yet. Einstein's theory included time as one of the dimensions of space-time continuum.

He had propounded many scientific statements in his theories on relativity - special and general. He didn't prove any of them. But most of them were verified later by other teams of scientists, some even long after his death.

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Could you please explain to me how the material of the wire affects the resistance?

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Question found in Physics
Flow of electrons (current) is possible in a material if there are free electrons on the surface. In metals the peripheral electrons (those in the outer orbit)are generally free. In most other substances they are bound strongly and do not move easily. This is how the nature of materials affects the resistance.

Comments :
thanks very much, very helpful


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How can I hypnotise myself?

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Question found in Alternative In General
You can't. Even if you can, it would be dangerous. But you can go into a state of deep meditation or BLISSFUL state similar to hypnosis by proper practice of yoga. For this you need long practice under a proper guru or master.

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Which language did man first speak? Also how did people first learn to speak in different languages from each other? Who spoke the first English words, who spoke the first Spanish words, who spoke the first Italian etc? How come we all just didn't end speaking in the same language?

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Question found in Cultures In General
No one can authoritatively say what was the language first spoken by man. The guttural utterances of our ancestors developed into languages in the course of thousands of years. During this time they had been migrating or spreading out. Gradually in different geographical locations languages developed differently.
Among the existing, primitive, spoken languages the oldest could very likely be the language spoken by the san people (bush men) of Southern Africa. According to many scholars the oldest of the existing languages with alphabet and literature is Tamil spoken in the southern parts of India.

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What are two functions of the cell wall?

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Question found in Biology
1. The cell wall encloses and protects the cytoplasm.
2. It regulates the flow of materials into and out of the cytoplasm.

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Where is the cytoplasm located?

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Question found in Biology
All the substance of the cell within the cell-wall except the nucleus is called cytoplasm.

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It seems that white skin would be better at reflecting the suns rays away than dark skin, and so would provide better protection against the sun. Why does skin go darker rather than lighter in the sun?

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Question found in Biology
It is a chemical called melanin in the dark skin that prevents sunburn or tanning. This is absent in light skins and hence tanning.

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I have just met a guy!

I am totally confused, how do I know if hes the one for me, I don't know if I'm physically attracted to him, I just don't know if hes my type, the more he calls me, the more I get scared off!

How can I know if Ive met the right one or not?

Its not like I'm a kid anymore, I should be able to recognise the man thats for me without all this agonising!

Please help!

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Question found in Dating
Take it easy. If you have just met him give him more time before judging. Was it a case of love at first sight? But try to find more about him. Don't allow much freedom till you are more familiar. I don't know your background - religiously. I am a religious person. In such matters I take decisions prayerfully. So, as I said, go slow and I shall say a prayer for you.

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How does an electric generator generate electricity? Please explain the physics behind it.

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Question found in Physics
The principle is: An electric current flows through a conductor that moves in a magnetic field.
In a generator a coil - conductor - is made to rotate between the poles as a powerful magnet. The turbines uses mechanical energy of the turbines to make the coil rotate at right angles to the field. The strength of the current depends on the strength of the field, number of turns of the coil. The speed of rotation etc.

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