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

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

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