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

Why is ice slippery?

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Question found in Physics
At temperatures above 0 degree Celsius, ice is wet due to the gradual melting process. A thin layer of water on ice makes it very slippery like any other wet smooth hard surface.

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Are there really incarnated angels on earth?

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Question found in Spirituality In General
We are all incarnated angels. At least we must try to be. When we do good to others, when we live in love, we are angels incarnated. Doing evil, we become devil incarnates.

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I'm having a hard time with the concepts of finding the surface areas of objects. Can you help me out?

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Question found in Student Studies & Student Life
Yes; I can help if you describe the object and furnish its dimensions.

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Is it a truism that everything happens for a reason?

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Question found in Philosophy
My personal conviction is that everything happens for a reason. But therecould be exceptions or I could be wrong.

Comments :
Thanks

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I am told electromagnetic waves have two components at right angles - a magnetic field and an electrical field. I was always told that an electrical field is created when a current flows-say within a wire. So how can a wave have an electrical field when no particles such as electrons are present?

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Question found in Physics
The electric and magnetic fields causing the EM waves are produced when an electron experiences a change in its energy level. This point is just the source of the radiation. The waves or radiation then propagates through suitable medium or vacuum or space and it needs no more materials or electrons for it to move on.

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What happens when we exhale?

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Question found in Biology
Carbondioxide is given out.

Breathing (inhaling and exhaling) is the essential process of life where the inhaled oxygen causes oxidation (burning) of the carbohydrates in our food produces the energy for living. In this process two products formed are carbondioxide and water. The inhaled air is rich in oxygen while the exhaled air is rich in carbondioxide and water vapour.

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A 10-kg object has a momentum of 50 kg m/s its velocity is?

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Question found in Physics
velocity = 5 m/s

momentum = mass x velocity

velocity = momentum/mass = 50/10 = 5

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What is the difference between nuclear fusion and nuclear fission?

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Question found in Physics
Both processes release energy. In fission, the nucleus of an isotope of a heavy element like uranium 235 is split (fission) into two lighter nuclei.
In fusion on the other hand two nuclei of light elements like Deutrium (Hydrohen atom with a neutron as well as a proton) are made to fuse into one - that of helium.

Nuclear fission is the common form used in all the nuclear reactors used for production of energy as well as for research purposes. These are dangerous as they leave a lot of nuclear waste - radio-active materials at the end of the reaction.

Nuclear fusion reaction supplies clean energy - without any radio-active waste left around. But so far we have failed to produce a viable means of producing this on a commercial basis.

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I added 3 odd numbers and my answer is equal to 50. Why am I not correct?

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Question found in Student Studies & Student Life
The sum of any three odd numbers have to be an odd number.

eg. 3 + 5 + 7 = 15

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What is the meaning of life?

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Question found in Theology
There are many ways of looking at this question.
1. Life is a precious gift, an amazing gift. Plant life makes our world a beautiful one. Animal life makes our world ‘alive’. Human life gives meaning to creation.
Death is the inevitable aspect of mortal life that we share with all the animals. Immortality is the unique aspect of spiritual life, the life of the soul, which only humans have.
Life becomes meaningful when we utilize these faculties in knowing, loving and serving the Lord. This is best accomplished by trying to understand
love and serve our fellow beings, the children of God.

2. Or we may say something like this: Life is that which made a rare combination of very complex molecules suddenly alive. Here we are assuming that during chemical evolution that went side by side with cosmic evolution some very complex organic molecules came into existence. What gave that system of molecules the power to replicate itself, that is what we call life.

3. Life is a mystery - an enigma, something not easy to understand. Craig Ventor, the head of one of the teams that did genome sequencing said in 2001, "The only way we can get life is out of life itself". He had entrusted a team of scientist on a six year assignment to determine what is the minimum number of genes needed for something to be alive. In the National Geographic of March 2006 Joel Achenbach wrote, "The emergence of life on earth is on a short list of the biggest unknowns in science."

4. Since I am not a scientist I can boldly say that life is something unique or special that God instilled into a system of molecules at the peak of chemical evolution.


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