[Music]
it's
um sometime what if year 2020
disappeared oh no
i became famous in the year 2020
to buy this sweatshirt visit umsum.com
firstly kova 19 pandemic shattered the
lives of millions of people
worldwide if 2020 disappeared
this might prove to be the best news for
humanity
secondly a circumbinary planet a planet
that orbits two stars instead of one was
discovered
if 2020 disappeared scientists would be
extremely disappointed
thirdly dow jones fell by the most
points in history on the 16th of march
if 2020 disappeared stock traders would
be
one happy lot hmm
fourthly eurovision song contest 2020
was cancelled due to covet 19.
if 2020 disappeared singing fans would
be
one happy lot hmm
lastly bahadla solar park the world's
largest solar park was commissioned in
india
if 2020 disappeared solar energy fans
would be
one sad lot hmm
what if earth lost its atmosphere
then i would cover it using my um some
umbrella wow some
sound travels to our ears by vibrating
air molecules which are
present all around us now
no atmosphere means no air hence there
would be complete silence
secondly no atmosphere means no oxygen
life on land would not last for more
than five minutes
but life inside oceans might continue
for some time as
fishes will use dissolved oxygen to
survive
eventually even that supply will run out
thirdly no atmosphere means no clouds
our sky would lose its magnificent blue
color
it would look just as black as outer
space hmm
fourthly unfortunately birds can't fly
in a vacuum
they will drop down to earth lastly
without any atmosphere days would be
shorter by four minutes while
nights longer as atmospheric refraction
advances
sunrise by two minutes and delays sunset
by two minutes
what if all coral reefs disappear
then i will join the avengers and
searching them
oh um some a coral reef is an underwater
ecosystem which is composed of the
skeletons of marine invertebrates called
coral they occupy just 0.1 percent of
the ocean's surface
but support more than 25 of marine life
if coral reefs were to disappear firstly
there will be a dramatic decline in fish
population as they depend on coral reefs
for food as well as shelter
secondly popular beaches around the
world would be in for a shock as coral
reefs provide protection to coastal
areas by reducing erosion due to ocean
waves as well as shielding against the
devastating
impact of storms hurricanes etc
lastly tourism would take a huge hit as
snorkeling or scuba diving might go out
of fashion as the underwater world will
no longer be colorful or beautiful
what if we lived on mars then i will
keep on
jumping all day long what
oh i'm some due to extremely low
atmospheric pressure on mars we will
need to live inside buildings with
pressure vessels and walk around with
pressure suits
no need to lose our weight anymore
gravity on mars is 38
lower than that on earth mars is
extremely cold as compared to earth
so get used to seeing ice everywhere
with extreme water scarcity on mars say
bye bye to those
long leisurely baths get used to those
huge dust storms you see in movies they
will be a living reality in mars
sunscreen makers will be one happy lot
as the extremely thin atmosphere on mars
does not absorb much
ultraviolet sunlight with no more rain
and virtually no clouds on mars
it's time to forget about those
beautiful rainbows and sunsets
what if we lived on mars then i will
keep on jumping all day long
what oh i'm some due to extremely low
atmospheric pressure on mars we will
need to live inside buildings with
pressure vessels and walk around with
pressure suits
no need to lose our weight anymore
gravity on mars
is 38 lower than that on earth
mars is extremely cold as compared to
earth
so get used to seeing ice everywhere
with extreme water scarcity on mars say
bye bye to those long leisurely baths
get used to those huge dust storms you
see in movies
they will be a living reality in mars
sunscreen makers will be one happy lot
as the extremely thin atmosphere on mars
does not absorb much
ultraviolet sunlight with no more rain
and virtually no clouds on mars
it's time to forget about those
beautiful rainbows and sunsets
how do x-rays work it's
confidential nah x-rays are very high
energy waves
they were accidentally discovered by a
physicist named wilhelm
rogan as he did not know what they were
he named them
x-rays x-rays can pass through many
objects but if an object's density is
more
then these rays get absorbed and don't
pass due to this property
x-rays are used to detect fractures
tumors etc
to detect a fracture x-rays are passed
through our body which then hit an
x-ray detector or a photographic film
now since our tissues are not dense
enough much of the x-rays pass through
them and get detected by the film thus
casting a dark or
grey shadow on the film but as the bones
are much denser the x-rays get absorbed
and hence
the bones appear white on the film this
allows doctors to have a look at the
structure of bones and thus
spot the fracture
why do we crave sugar cause sugar
contains
all the essential nutrients nah
sugar is found in many food items like
chocolates cakes ice creams etc dude
they are really tempting indeed but
when we eat such sugary foods the sweet
sensing taste buds in our tongue
sends signals to the brain in the brain
these signals activate
the reward system due to which
neurotransmitters like dopamine are
released
dopamine gives us pleasure and makes us
feel good as it makes us feel good we
tend to eat more sweet sugary foods to
get the same feeling
thus sugar acts like a drug making us
addictive
and thus causing cravings however
note that excess sugar is not good for
mental as well as physical health
hence we can use natural sweeteners like
jaggery and honey which don't cause harm
and satisfy
our cravings
how to not cry while cutting onions
watch a comedy movie
nah when we cut onions chemicals like
sulfoxides and
enzymes are released which react to
eventually form a gas
this gas reacts with the lubricating
liquid in our eyes and produces sulfuric
acid
which makes us cry
however if we freeze onions before
cutting then the temperature of
onions drops due to this the sulfoxides
and
enzymes react slowly producing less gas
and
thus reducing the amount of crying we
can even wear tight goggles so that the
gas
doesn't reach our eyes
it is also said that below the onion
roots there is a bulb where the
concentration of chemicals is more
hence to avoid crying we should first
cut and
throw that part also cutting an onion
under running water washes away the
chemicals
hence we can also use this method to
reduce crying while cutting onions
do strawberries have seeds on the
outside cause seeds feel hot inside
no first of all a fruit is formed from a
flower
a flower consists of ovary ovule
petals sepals stamens etc
most of these parts are attached to
receptacle
now usually after fertilization the
ovule forms a seed and the ovary swells
to form a fruit
whereas the remaining parts of the
flower fall off
now a strawberry flower has multiple
ovaries
when fertilization occurs all the
ovaries form fruits but they don't swell
instead the receptacle of the strawberry
flour swells to form the red edible part
of the strawberry and the tiny fruits
get embedded on the surface of the
enlarged receptacle
while the remaining parts fall off thus
the seeds on the outside of the
strawberry are actually tiny fruits
each of which contains a seed
why do heavier objects fall faster
whether an object is heavy or light all
objects accelerate at the same rate
towards the earth
that is at 9.8 meters per second squared
this means all objects should fall at
the same speed
right absolutely
however this happens only when there is
vacuum
a scientist named robert boyle placed a
coin in a feather in a big glass jar and
removed all the air from it
thus creating a vacuum he then
inverted the jar and observed that both
the objects fell to the bottom
at the same time but this doesn't happen
on earth because here the speed of
falling objects depends upon their
surface area
and air resistance the feather has more
surface area as compared to the coin
hence more air pushes against the
feather due to which it experiences
greater air resistance and
thus the feather falls slower as
compared to the coin