Earth ki density kese maloom karte hain
Earth ki density kese calculate karte hain
Physics class 11th
Mdcat physics
First year physics
Earth ki density kese calculate karte hain
Physics class 11th
Mdcat physics
First year physics
Category
๐
LearningTranscript
00:00hello everyone welcome to my youtube channel dear viewers and a students
00:08today we will calculate the average density of earth as we know that density
00:20rho is equal to mass per unit volume so for earth it will be mass of earth
00:38divided by volume of earth so we can also write it as mass of earth divided
00:51by volume of earth is mass of earth is equal to G into r e square upon capital G
01:07and volume of earth is earth is spherical shaped so the volume of
01:20spherical shaped bodies is calculated by the formula 4 upon 3 pi r cube so here r
01:30is the radius of earth so r e cube r e denotes to radius of earth so average
01:38density of earth will be G into r e square divided by capital G when we will
01:49change deviant into multiplication then then the values of denominators will
01:56come into numerators and the values of numerator come into denominator so it
02:02will be 3 upon 4 pi r e cube so r e square will be get cancelled with r e
02:17cube so the average density of earth will be obtained as 3 into G it will be
02:273 into G upon 4 pi into G into r e so by putting the given values the average
02:44density of earth will be 3 into as the value of G on the surface of earth is 9.8
02:51meter per second square divided by force into the value of pi is 3.14 into the
03:01value of capital G is 6.67 into 10 raised to power minus 11 into the radius of
03:09earth is 6.4 into 10 raised to power 6 so the average density of earth will be
03:233 into 9.8 it will be 29.4 divided by when we will multiply all the
03:33given values then we will get 536.16 into 10 raised to power minus 11 plus 6 so it
03:54will be minus 5 so after simplification we will get the answer is 0.0548 into 10 raised to power
04:15plus 5 so when we will shift decimal up to two digits from left to right then we
04:28will subtract minus 2 from the power so average density will be obtained as 5.48
04:40into 10 raised to power 3 kilogram per meter cube or we can also write it as the average
04:56density will be 5.5 into 10 raised to power 3 kilogram per meter cube or we can also write it as the average density of earth will be 5500 kilogram per meter cube
05:26so this is our required value for the average density of earth thank you