interresting video! But I don't really understand one thing: How was cavendish able to determine the mass of the earth? He knew about the radius of the earth, the value of M1(the object) and he was able to measure whit what force the ball is attracted to the earth. But he didn't know the exact values of the gravitational constant and M2 (the earth). I hope someone will read my question and answer it... you never know.
Weighing the Earth and calculating how much it weighs is the same process. A simple household scale uses a mathematical algorithm to correctly display your weight.
I heard that if you dig a very straight tunnel from the surface of the Earth, through the Earth (not necessarily through the centre of the Earth), to a another place on the surface of the Earth that, no matter how long or short this tunnel is, the journey from surface to surface would only take about 40 minutes, because of the Earth's gravitational pull.
Not really that relevant, but still interesting. :)
@mrteemumilto At the center of the earth I would imagine you would be weightless but with the entire weight of the world crushing in around you from all sides. I don't know though, interesting to think about.
@mrteemumilto If you were at the centre of the Earth you would experience weightlessness. The gravitational field of the Earth is a radial field and the entire object is responsible for the gravitational pull. If you dug down you will be bypassing all of the rock above you and the gravitational pull would lessen as you neared the core.
@AmusingYeti Wouldn't it pull you apart, because gravity happens because of the matter, and the gravity is not just directional 'upwards'. In the center you'd have repulsive forces to all directions, on the surface you have the attracting force of just what is directly under you.
What is the ratio of planetary matter and the gravity it exerts around it?
@mrteemumilto Nope :) For this to happen the tidal force you experience would have to be huge. The tidal force is the difference in force experienced between two points. So your head would need to experience a much greater force than your feet would. This is similar to "spaghettification" that you experience at a black hole. Our gravitational field is too weak for this to occur. On the surface our feet are being pulled greater than our head my a minescule amount!
@AmusingYeti You didn't complete the answer to my questions. Not pulling apart literally, just on a force level. The core is a sort of nexus of gravitational lines, all pulling to one direction?
What is the ratio of planetary matter and the gravity? How small fraction?
interresting video! But I don't really understand one thing: How was cavendish able to determine the mass of the earth? He knew about the radius of the earth, the value of M1(the object) and he was able to measure whit what force the ball is attracted to the earth. But he didn't know the exact values of the gravitational constant and M2 (the earth). I hope someone will read my question and answer it... you never know.
ytkoekie2000 1 month ago
if i worked it out right its 5,780,000,000,000,000,000,000,000,000 septillion KG.............:}
familyguy3313 3 months ago in playlist familyguy3313's favorites
@3Nex
Weighing the Earth and calculating how much it weighs is the same process. A simple household scale uses a mathematical algorithm to correctly display your weight.
Spyez 7 months ago
this isnt weighting the earth, its calculating how much it weights.
3Nex 7 months ago
hmm, kinda cheated, the scale is actually a force to mass converter tuned for earth gravity.
moestietabarnak 7 months ago in playlist recent
you need to make much more videos, such great content
managarm1349 7 months ago 17
g = 9.81 m/s²
alain001 7 months ago
@alain001 Congratuliminizations!
You have just stated acceleration due to gravity! :D
Not the Universal Gravitational Constant. :)
RandomAwe 7 months ago 3
@RandomAwe I stated g, not G ;-)
alain001 7 months ago
how did the greeks figure out the radius of the earth?
PartVIII 7 months ago 4
@PartVIII Greeks had used a deep hole and sunlight and triangle similarities to mesure the radius of the Earth ,-)
bnghtz 7 months ago
THAT is AWESOME!!!!!!! I love math!
briansmobile1 7 months ago
But isn't the bocchi ball part of the Earth?
DeeperBlueX16 7 months ago
cool :) nice vid
lucklyclover58 7 months ago
@gamer1337omg Yeah, I think that's right, though I did say "about 40". :P
Did you hear it on QI?
mattius999 7 months ago
I heard that if you dig a very straight tunnel from the surface of the Earth, through the Earth (not necessarily through the centre of the Earth), to a another place on the surface of the Earth that, no matter how long or short this tunnel is, the journey from surface to surface would only take about 40 minutes, because of the Earth's gravitational pull.
Not really that relevant, but still interesting. :)
mattius999 7 months ago 6
great video!
dannymusick 7 months ago
What is the ratio of the mass of the Earth the gravity on it?
What is the gravity at the center of the Earth?
mrteemumilto 7 months ago
@mrteemumilto At the center of the earth I would imagine you would be weightless but with the entire weight of the world crushing in around you from all sides. I don't know though, interesting to think about.
ArchNME 7 months ago
@mrteemumilto If you were at the centre of the Earth you would experience weightlessness. The gravitational field of the Earth is a radial field and the entire object is responsible for the gravitational pull. If you dug down you will be bypassing all of the rock above you and the gravitational pull would lessen as you neared the core.
AmusingYeti 7 months ago
@AmusingYeti Wouldn't it pull you apart, because gravity happens because of the matter, and the gravity is not just directional 'upwards'. In the center you'd have repulsive forces to all directions, on the surface you have the attracting force of just what is directly under you.
What is the ratio of planetary matter and the gravity it exerts around it?
mrteemumilto 7 months ago
@mrteemumilto Nope :) For this to happen the tidal force you experience would have to be huge. The tidal force is the difference in force experienced between two points. So your head would need to experience a much greater force than your feet would. This is similar to "spaghettification" that you experience at a black hole. Our gravitational field is too weak for this to occur. On the surface our feet are being pulled greater than our head my a minescule amount!
AmusingYeti 7 months ago
@AmusingYeti You didn't complete the answer to my questions. Not pulling apart literally, just on a force level. The core is a sort of nexus of gravitational lines, all pulling to one direction?
What is the ratio of planetary matter and the gravity? How small fraction?
mrteemumilto 7 months ago
3rd
TeenageIronman 7 months ago
your videos are amazing
Krampfarsch 7 months ago
very informative as always :)
johno993 7 months ago