Both are same.The mass of each is 1 kg.But 1 important
point the weight of two may not be the same(mg).This is
because as the cotton is porous and can have some air
inside its pores as well as its volume will be
considerable.It will experience an upward buoyant
force.Hence the effective weight=the weight mg(act down)-
the upthrust(act up),which is volume of cotton(net with
pores)*density air*g.
generally weight is product of mass*g
but mass=volume *density.iron is more densed,and cotton
occupies more volume .so both will get cancelled.so both
will have the same weight.
The question is which one is heavier.The question is not which one will fall soon.So no buoyancy effect comes into picture.
what rest is the weight.Now w=mg.
1 kg mass is a constant and standard value in anywhere in the universe.
So both iron and cotton are having same amount of matter
(1 kg) in it.
Remember the air inside the cotton will not be taken into account as we are taking pure 1kg of cotton.If you are taking air then it will be more than 1 kg of cotton.
So they will experience (1*9.81) N both in earth ground.
So the answer of the question is they are same as weight though volume of 1 kg cotton is larger than 1kg of iron.
***********
(If they are freely falling then the cotton will take much time due to large volume and so bigger buoyancy effect of air.
In space they will take same time to fall a distance.)
Its not your club man.If dont know the answer please dont post such vulgar comments.Please dont assume that You only know the bad words.But the problem is this is not the right place.
By the way in respect to your comment I can say "Charity Begins at home"..
bloody modern typical hipocrat with all the F* words always.And the rest of the days are booked for your mother,right?
If a 2 kg rubber is dropped in 8 kg water container(water
will not come out from the container), what will be the
total weight-
incase when the rubber sinks in the water and when the
rubber floats on the water?
types of stainless steel.why does this called
stainless.what is passivation related to SS? What is
sensitisation in stainless? Examples of diffrent type of
steel e.g. austenatic,martensite,ferritic etc. 304,303,316.
How to get rid of carbide formation in SS and stablization
in SS.(347 etc.)Different type of heat treatments. Iron
carbon diagram. Nelson chart with respect to corosion.
Diffrent type of corosion and causes. Carbon equvalent
number. Welding related questions.(requirement of post and
pre heating in welding). welding of SS. If you have pre
experience in maintenance then Material and welding related
questions will be there. Then various types equipment in
plant (a) static (b) rotatic in pumps and
compressor,turbines funda of balance drum and balance disc,
balancing line. Impulse wheel, wheel chamber pressure and
its effect on turbone health if this increases. Thermal
expansion of turbines and with respect to how foundation
bolting are designed. Fixing of lower casing before
dismantling. Most important shaft alignment and balancing
of rotating equipment,classification of static and rotatic
equpment used in process plants. Materials for diffrent
services as refinery plants fertilizer plants, cement
plants, sulphur plants, crude oil with higher sulphur
services, then third important thing is codes, standards
and recommended practices of diffrent organisation like
ASTM,ASME,API,TEMA,BIS,IS,ISO,NPFA,OISD etc. diffrent type
of work permit systems fire and safety point of view.
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