/sci/ - Science & Math

https://youtu.be/lR9r7_MweK8
Fenomenal video. It neatly expresses thoughs i think many of us here had. In the end we are just lucky to be here at this time to experience it all, even if it's just life on earth. Watch it if you don't have anything better to do, but i'd say it's worth it.

They say that the faster an object moves the heavier it gets.

and from what I understand there was a starting point to the universe.

Now lets say I move from Earth to another planet that had say 10% of the Earth's velocity. Would that mean I'm lighter on this planet than on Earth?

Why can't you see the sky from outer space? Where does it go?

>we're supposed to believe the word of the lucky 0.0001% who have been to (((space))) that the Earth is a sphere
>round earthers then appeal to this authority to win arguments that the Earth is not flat

I thought you were all better than these petty logical fallacies /sci/

>>8727805
http://visibleearth.nasa.gov/view.php?id=57723
Yeah but I get what you're saying, I can't believe I didn't think of that.

settled.

>>8191152

As a quick reminder and introduction, let’s take a look at gravitational energy and the Earth:

If a coin is flung up into the air, how do we determine whether it will escape the atmosphere or return to Earth?

Et = ½ mv^2 - GMm/r

Total gravitational energy is equal to kinetic energy minus potential energy; positive energy minus negative energy.

Et >0 = escape

Et <0 = return

We can determine the escape velocity of the Earth using this equation, which is 11km/s.

This method can also be used to determine the gravitational energy of a galaxy and its ultimate fate:

A.E motion ≈ v^2 ≈ H^2 (+)

B.E gravity ≈ M ≈ ρ (density) (-)

B/A >1 = collapse

B/A <1 = expand forever

>>8184499

As a quick reminder and introduction, let’s take a look at gravitational energy and the Earth:

If a coin is flung up into the air, how do we determine whether it will escape the atmosphere or return to Earth?

Et = ½ mv^2 - GMm/r

Total gravitational energy is equal to kinetic energy minus potential energy; positive energy minus negative energy.

Et >0 = escape

Et <0 = return

We can determine the escape velocity of the Earth using this equation, which is 11km/s.

This method can also be used to determine the gravitational energy of a galaxy and its ultimate fate:

A.E motion ≈ v^2 ≈ H^2 (+)

B.E gravity ≈ M ≈ ρ (density) (-)

B/A >1 = collapse

B/A <1 = expand forever

Are we all gonna die before we get the chance to leave this rock?