Goalfinder

Hi I am goalfinder , from India, did lot of things - engineering-mba-movie SFX- teaching-advtg-offset print& design finally settled down to animating science and tech. Like it here so will be here for a while.

The answer is A, for the same volume, smaller Polystyrene balls will be more in number and will produce greater surface area (resistance to your body than lesser (coz they are bigger) plastic balls. Better understood with If the pool was filled with sand(minute balls) then you will not sink much.

Atoms are about ten millionth of a millimeter across and weigh 100 trillionth of a trillionth of a gram

Plants contain an even higher proportion of water than human body

I definately root for analytical and biochemistry

The amount of energy produced by sun in a fraction of a second is more than what can be produced by burning all Earth's natural reserves of oil, coal, wood and natural gas

source : nuclear fusion in Sun

Clorophyll for producing oxygen in leaf is exactly same in structure as hemoglobin of our body that absorbs oxygen

the only difference is of Mangnese in former and iron in latter

Source : Photosynthesis

Glucose is cellulose reversed one is edible other is not

Source chemistry of wood

The sahara desert has its own antelope that takes all the water it needs from its food and does not need a waterhole to survive.

Mercury's day time temerature is 430 deg C enough to melt lead and its atmosphere is so thin that it loses all heat in night when temp are -180 deg C

ok...

 

when you write a chemical symbol like Mg you could write Mg (s) coz Mg is a solid... H2O is a liquid so (l)? but (aq) is sumin disolved in water... so how would you write H2O (??)..... prob (l) but im not 100% sure!?!?!?

liquid is a state by itself H2O can be a solid in ice' date=' liquid beyond 0 deg C and vapour (gas) beyond 100 Deg C under normal conditions of pressure, similarly all gases can be in either of state. It is the property of matter. Refer this animation on matter

Hexagonal Close Packed (hcp).

C2H5OH - ethyl alcohol for drinking and for cars

polythene used in plastic bags and insulation is made from monomer ethylene (CH2=CH2)

C17H36 is paraffin used in wax of candle

The protons and neutrons in a nucleus have discrete energy levels. The neutron well is generally deeper (and more so for larger nuclei) because there is no electrostatic repulsion' date=' so that's why there tend to be be more neutrons, and more so as you get larger nuclei - you want the wells filled to the same level. If there is a vacant energy level in the "other" well that is lower energy so that the resulting nucleus is at a lower energy (the proton, having a smaller mass, requires a small minimum difference), then the particle will undergo decay.

 

As has been said, you have to solve for the exact configuration to see if it would be stable or not, but there are some guidelines. Paired-up particles tend to be in a lower energy configuration, so a nucleus with an odd number of both neutrons and protons will likely be unstable (true for all nuclei larger than N-14). Even-even nuclei are more likely to be stable than even-odd nuclei. And nuclei with a filled shell of either or both is more likely to be stable (filled shells occurring at 2, 8, 20, 28, 50, 82 and 126 particles)

 

Large nuclei tend to decay because they're big - the nuclear force is finite-ranged, so the attractive force a nucleon feels doesn't keep growing with larger nuclei, but the repulsive force protons feel does (because that is an infinite-range force). So larger nuclei don't tend to be as tightly bound, and can get to a lower energy state by ejecting particles. Emitting alphas is a very efficient way of doing this, and a He-4 nucleus is very tightly bound (doubly magic)[/quote']

I agree it is the energy that keeps them together

refer nucleus by rutherford

I agree with pullkit, at some point of time chemistry dissolves into mathematics and then it does become tedious and "boring", I have attempted to put concepts before calculations on my site - tackling subjects like atomic theory and why wood burns and explaining their concepts through animation so that memorization is done away with check out these links

chemistry of wood burning

Discovery of nucleus by rutherford

Cross jumping between species is common for bird flu and other virus example sars, hanta virus have been killers too.

more info

No viruses have hemagglutnin proteins on their surface that can bind to complementary receptors on cell, this is something like a triangle projection binding to its reverse wedge. Somwthing like a dove tail joint except that this chemical in nature. This enables virus to bind to multiple hosts for example a bird virus can bind to birds, pigs and human cells but in different areas, it can bind to ciliated epithelial cells in human mucosa and to epithlial cells in birds. Once it binds then it can enter the cells. Thus the binding does not signify origins, it just signifies matching "shapes", refer this site for more explanation on virus

bird flu is not serious problem for us human beings till it remains confined to birds but this virus has jumped before it is only 0.18% different from that of 1918. The problem is our body does not know how to fight it, the concern is because even the normal flu kills hundred thousands all over the world and this is more deadly form, this link describes in a movie format info about flu virus

Hmm well you seem to be having a point there

anyway check out this site on neuronal transmission animation

Viruses have been playing an evolutionary game like humans, I think they have beaten us to it with HIV. A virus that is so prolific that it can hide in our protective mechanism and generate thousands of variants, so to overwhelm anything we throw at it. To understand viruses lets have a look at life in general, there are two strong points here

1) Brought down to its basics everything is a chemical code whether living or non-living. The code has to be reproduced and proliferated so that species can survive. The more it spreads the better is its survival chances become.

2) The more parasitic one is (living off other species) the more dominant that species becomes and survives better.

The evolution of viruses is still hazy because there could have been no single origin source of viruses as organisms as they are of different sizeez and complexity. large DNA viruses like pox- and herpesviruses could be presumed to have "degenerated" from cellular organisms, as their enzymes share a sequence similarity with sequences from cells than with other viruses. They all probably share a common origin of the reverse transcription function. Hence instead of a single family tree it could have been more spread across bushes. It is believed that Viruses of all the major classes of organisms - animals, plants, fungi and bacteria / archaea - probably evolved with their hosts in the seas.

the complications in finding the source arises because these viruses can jump from host to host, for those in arthopods can be traced to virus families infecting insects and mammals. Those in birds have jumped to humans.

There are indepth explanation about viruses in movie format here Bird flu virus part 1 or bird flu virus part 2

check them out

What about fire? It starts' date=' grows, can split off into new fires, and eventually is extinguished. It can even be said to "eat" and break down the chemicals it "eats" for their chemical energy.

 

Mokele[/quote']

In its simplest form life is composed of two energies potential and kinetic, again in its simplest form as chemicals such as hydrogen, oxygen, carbon etc, both of these i.e the energy and chemicals are present in living as well as non-living. Maybe its the third differentiating factor something electrical (as in neural networks or signals that pass through our body) that makes them different; makes the the chemicals react, resulting into their forming bonds releasing energy in form of heat which further produces more reactions. The same electrical signals control them through muscle movement in humans later to make these chemicals (blood,food etc) move in certain directions.

Now according to me all these three are measurable and to some extent controllable by external means. Even at the risk of sounding far-fetched : could there be some kind of software invisible to the eye (or senses) that controls the electrical signals in living ? It could be a main differentiating factor since its presence its visible only in the actions it initiates, we are all the time measuring the actions and the results but unable to recognize its presence . anybody knows more about this ? I will be putting up a section of kinetic and potential energy in animation format soon on my site http://www.goalfinder.com, I seek to research and present this aspect life through animation. Would it be worthwhile ?

Just a comparitive analysis

Plasmas perform extraordinarily well under most ambient light conditions. Very bright light does not wash out the image on the screen. The beauty of these flat screens is that, unlike front view projection screens, you don't have to turn off the lights to see the image clearly and easily. Therefore, plasmas are excellent for video conferencing and other presentation needs, which require the lights to remain on.

Another characteristic of a plasma panel is the extreme viewing angles both vertically and horizontally. With 160 degrees viewing angle, people sitting off to the side of the plasma screen will still be able to see the image without losing any of it.

Plasmas tend to be very lightweight in comparison to similar sized standard display monitors and television screens.

No existing display system can compete with the low depths available in plasma panels. The thinness of theses systems allows for the monitors to be placed virtually anywhere. Some plasma panels are known to be as thin as 3.5 inches deep.

They can be hung on walls, mounted to ceilings, flush wall mounted or placed on a tabletop. Many mount manufacturers are designing more creative ways to mount plasma panels because of the ease of engineering involved.

I hope that clarifies