[Music]
it's um sometime hi guys
can you guess the title of my next video
hurry up write your guess in the
comments section below are you afraid of
heights I think it is because of vertigo
vertigo is not necessarily fear of
heights in medical terms vertical refers
to a false sensation of movement due to
which we feel dizzy the most common type
of vertigo is benign paroxysmal
positional vertigo or BPPV it is caused
when our inner ear which helps us
maintain balance by detecting motion and
position of our body doesn't function
properly normally when we move our head
the cilia and calcium crystals in our
inner ear move thus sending signals to
the brain about our movement however
sometimes some crystals dislodge and
move into the fluid filled semicircular
canals now when we move our head the
crystals move along with the fluid
however even after our head movement has
stopped the crystals keep moving in the
canals thus sending wrong signals to the
brain that our head is still moving due
to this wrong information the person
gets a false sensation of movement which
makes him feel dizzy
thus causing vertigo how do fireflies
glow using a magic wand
[Music]
now huh fireflies glow because they
produce light by a biochemical reaction
Oh in the lower abdomen of fireflies
there's a chemical called luciferin and
an enzyme called luciferase when oxygen
enters into the lower abdomen through
tracheal tubes
it basically reacts with luciferin in
the presence of luciferase this reaction
produces light this production and
emission of light by living organism is
called bioluminescence bioluminescence
is a cold light hmm
this means the light produced generates
very less heat but preventing the
fireflies abdomen from getting
overheated yeah dude it's not hot
however one more interesting fact is
that not only adult fireflies but also
their eggs and larvae or bioluminescent
Wow they look so stunning ah why honey
doesn't spoil cuz honey is actually a
magical potion nah honey doesn't spoil
mainly because of osmosis osmosis is the
movement of water from a region of
higher water concentration through a
semipermeable membrane to a region of
lower water concentration now the water
content in honey is far less than the
water content in organisms like bacteria
and fungi hence when such organisms try
to enter honey the water from their
bodies moves out into the honey due to
osmosis as a result they die and thus
the honey doesn't spoil in addition to
this some bees produce antibiotics
within their bodies to protect
themselves against certain bacteria
however when bees make honey some of
these antibiotics get added to the honey
these antibiotics also prevent the
growth of bacteria thus preventing the
honey from spoiling what is fracking a
dance form deep inside the earth there
is a layer of shale rocks these rocks
contain fossil fuels like oil and gas in
their pores to extract these fuels a
technique called fracking or hydraulic
fracturing is
be fracking a vertical well is drilled
into the layer of shale rocks then the
drill is turned by 90 degrees and
drilling continues horizontally when the
targeted distance is reached the
fracking well is encased then a
perforating gun is inserted in well when
the perforating gun reaches the required
distance the rocks are perforated then
the perforating gun is removed and a
fracking fluid is pumped into the well
this fluid builds pressure in the
perforations creating cracks in the
rocks thus releasing the fossil fuels
these fuels and the fracking fluid are
then drawn to the surface topic rust
[Music]
why is oxalic acid used to remove rust
stains hey you have a beautiful antique
lamp but look it has a rusting on it no
don't clean the rust stain with water
instead use this oxalic acid oxalic acid
you just don't want my lamb to be nice
and shiny do you know I am helping you
why don't you listen because I know that
you are making a fool out of me fine go
ahead
Oh No see I had told you now will you
use the oxalic acid look this thing
disappeared you pee do you know how this
happened hmm wait let me tell you rust
is hydrated iron oxide it is formed when
iron reacts with oxygen and water rust
is insoluble in water hence it is quite
difficult to remove rust stains hmm so
how does oxalic acid remove the stain
does it have some supernatural powers
absolutely not
oxalic acid reacts with rust to form
iron oxalate complex ion iron oxalate
complex ion is soluble in water thus it
can easily be washed away helping us
remove the rusting