• ### Why Doesn’t The Earth Fall Down?

Best answer: It doesn't have time to, it's kept busy falling around the sun. Can't fall 2 directions at once.
Best answer: It doesn't have time to, it's kept busy falling around the sun. Can't fall 2 directions at once.
20 answers · 1 week ago
• ### What is force?

14 answers · 1 week ago
• ### If temperature increases volume and pressure do as well?

Best answer: The answer is a definite maybe. There are formulas but you also need to know of any other physical constraints. For instance, the gas may be inside a container with a fixed volume. In that case the volume will not change. It may be that the gas is in a well-insulated container so that no heat either comes in or... show more

There are formulas but you also need to know of any other physical constraints. For instance, the gas may be inside a container with a fixed volume. In that case the volume will not change.

It may be that the gas is in a well-insulated container so that no heat either comes in or goes out. That will be subject to a different formula to the case where the container is not insulated - or when there is no container etc.

Here are some basic laws that you should learn in a basic science course about gases: https://en.wikipedia.org/wiki/Gas_laws

The other problem you get with gases in the atmosphere is that they do not remain in the same place. So you can know the pressure, volume and temperature at the start then apply the relevant equations but if the gas's density has changed then the whole packet of gas will have moved to somewhere else where the pressure and temperature have also changed.

The gas my have "done work" as well (e.g. pushed some other gases out of the way) then some heat will have been lost and you need to account for that as well.
12 answers · 1 week ago
• ### If you have a scientific theory and publish it as a book, is it safe to share without worrying about someone stealing it?

Best answer: It is automatically copy righted. However as with all research and theories if someone corrects a flaw it or improves on it that copy right means nothing.
Best answer: It is automatically copy righted. However as with all research and theories if someone corrects a flaw it or improves on it that copy right means nothing.
12 answers · 1 week ago
• ### Astronomy help with Kepler's 3rd law and Newton?

Best answer: Kepler's laws were for all bodies revolving around a single central body. The moons around Jupiter form one such system. Bodies around the sun form another system. Potentially we might have stars in a galaxy rotating around its centre. Newton did NOT derive any version of Kepler's law. He took... show more
Best answer: Kepler's laws were for all bodies revolving around a single central body.
The moons around Jupiter form one such system.
Bodies around the sun form another system.
Potentially we might have stars in a galaxy rotating around its centre.

Newton did NOT derive any version of Kepler's law. He took Kepler's law to be true and derived his theory of universal gravitation FROM THAT.
In other words Newton trusted Kepler's Laws and the observations made by astronomers for centuries before that. He could not dispute what was measurably true.

In other words if kepler is right R^3 / T^2 is a constant and if F = mw^2 R is true
Then we have F = m * kR/ R^3 = k m / R^2
ie the force of gravity would need to reduce according to 1/R^2 if gravity was to be the cause of Kepler's laws.

Now Newton was no fool. He realized that if gravity was proportional to one of the masses it must be proportional to the other one as well.
The universe does not play favourites.

So F = GMm/ R^2 where G is a constant.

Note that it is entirely dependent upon and consistent with Kepler.
It was derived from Kepler.

All that was left was for someone ( Cavendish ) to test this idea and see if gravity was indeed consistent with the above law.

It was tested and the tests were in agreement.
So we conclude that Newton was correct. Gravity IS the mysterious force that makes bodies orbit in space.

Note that effectively Newton made a PREDICTION, and an HYPOTHESIS.
His work said there must be a force of some sort for bodies to be able to orbit.
His hypothesis was that this force MIGHT be gravity.
His prediction was that if this was true gravity would need to follow the law of F = GMm/ R^2
5 answers · 7 days ago
• ### If i apply a net force of 4 newtons to an object, does the velocity of the block speed up?

Best answer: ( 1 ) The object will speed up ( velocity increase ) if the net force is in the direction of motion of the object.
( 2 ) The object will slow down ( velocity decrease ) if the net force is opposite to the direction of of motion
of the object.
Best answer: ( 1 ) The object will speed up ( velocity increase ) if the net force is in the direction of motion of the object.
( 2 ) The object will slow down ( velocity decrease ) if the net force is opposite to the direction of of motion
of the object.
7 answers · 2 weeks ago
• ### What does DPS stand for in physics. The question is: A DPS has a tendancy to drop his bowling ball on the... The unit is 2-D kinematics?

Best answer: Can you include the entire question? There's not enough information to determine what they're talking about. The use of "his" would seem to indicate it's referring to a person, but it's impossible to tell from the abbreviated sentence. -------------- I think they may be referring to a... show more
Best answer: Can you include the entire question?
There's not enough information to determine what they're talking about.

The use of "his" would seem to indicate it's referring to a person, but it's impossible to tell from the abbreviated sentence.

--------------
I think they may be referring to a Doctor of Professional Studies. Kind of like a PhD, but less Ivory Tower.

https://en.wikipedia.org/wiki/Doctor_of_...
5 answers · 7 days ago
• ### Is it at all possible to turn diamonds into coal with current OR future technology?

Coal is a "fossil fuel" produced by natural processes over eons..

It's basically graphite though, and it should be possible to convert diamond to graphite - but not "coal"..

Coal is a "fossil fuel" produced by natural processes over eons..

It's basically graphite though, and it should be possible to convert diamond to graphite - but not "coal"..
9 answers · 1 week ago
• ### Is there plane we go water?

8 answers · 1 week ago
• ### Can someone please explain this?

Best answer: We have the net force f = (m + M)A = (m + M)g - (m + M)a = 0; where a = g for both the pax, m, and the lift, M, when in free fall. So the net force on both m and M is zero during the drop. Which means the pax would be net weightless. So they could push upward and float to the ceiling, but would not slam up to... show more
Best answer: We have the net force f = (m + M)A = (m + M)g - (m + M)a = 0; where a = g for both the pax, m, and the lift, M, when in free fall. So the net force on both m and M is zero during the drop. Which means the pax would be net weightless. So they could push upward and float to the ceiling, but would not slam up to the ceiling in the fall. ANS.
7 answers · 1 week ago
• ### Is it at all possible that Earth's gravitational pull was less strong in the ancient past?

Best answer: If gravity was less strong, then the people would ALSO have weighed less. So for them the stones would have been just as hard to move as they are now !
Best answer: If gravity was less strong, then the people would ALSO have weighed less. So for them the stones would have been just as hard to move as they are now !
6 answers · 1 week ago
• ### How does an action come together and "happen"?

Take any action. Me asking this question, for example. 1.How does my brain get it together, chemistry wise, then guide my body physiologically into said action. And why did it to this? I could be eating, sleeping, or banging my head against the wall instead. 2.Why is the universe set up up just right to allow... show more
Take any action. Me asking this question, for example. 1.How does my brain get it together, chemistry wise, then guide my body physiologically into said action. And why did it to this? I could be eating, sleeping, or banging my head against the wall instead. 2.Why is the universe set up up just right to allow this action in this particular world? This world made up geologically, physically, chemically, and x amount of distance from the sun? 3.And on the microcosmic scale why did the quantum energy packets(?) come together just so? I thought things can both exist and not exist on a quantum level, AND travel backwards in time, etc. So why and how did it pull itself into a collective property and make me log into YA, and ask this particular question? 4.Most of us are familiar with Xeno's paradox, so I wont get into too much detail here. So how does all of the above stated action come together, yet cover infinite distance, in a measurable amount of time. At least in relation to the speed I'm traveling (see Einstein's Theory of Relativity for more detail)? I have lots more, but I don't want to get too wordy. And I already have eneough trouble sleeping a full 8 hours. Existence is driving me crazy!
6 answers · 2 weeks ago
• ### If two different masses were dropped from the same position above the earth BUT SEPERATELY?

"if two different masses were dropped from the same position above the earth BUT SEPERATELY AT DIFFERENT TIMES and friction wasnt present would gravitational pull of the larger mass on earth cause it to fall faster than the less massive object?
"if two different masses were dropped from the same position above the earth BUT SEPERATELY AT DIFFERENT TIMES and friction wasnt present would gravitational pull of the larger mass on earth cause it to fall faster than the less massive object?
5 answers · 7 days ago
• ### Does the Second Law of Thermodynamics allow Backward Time Travel?

If entropy always increases with time, does this mean that backward time travel is impossible as if time spontaneously went back, entropy would decrease.
If entropy always increases with time, does this mean that backward time travel is impossible as if time spontaneously went back, entropy would decrease.
7 answers · 1 week ago
• ### So.. scientists recreated the big bang by slamming 2 atoms... Why would they do that if there were no atoms to begin with?

7 answers · 1 week ago
• ### Could this violate Heisenberg's uncertain principle?

The uncertainty principle doesn't apply to predictions.

The uncertainty principle doesn't apply to predictions.
7 answers · 1 week ago
• ### Would we live longer without Gravity?

Best answer: Actually, we would not live as long. Experiments on the ISS have proven that our body DETERIORATES when there is no gravity. Our bones weaken, our muscles atrophy, and our heart weakens. After LONG stays on the Space Station, astronauts must be taken out of the recovery capsule on a stretcher, and spend several... show more
Best answer: Actually, we would not live as long.

Experiments on the ISS have proven that our body DETERIORATES when there is no gravity. Our bones weaken, our muscles atrophy, and our heart weakens.

After LONG stays on the Space Station, astronauts must be taken out of the recovery capsule on a stretcher, and spend several day in the hospital learning to walk again.
7 answers · 1 week ago
• ### Is there ever such a thing as a zero point in time?

23 answers · 2 weeks ago
• ### Why are most cars built to go 150+ when speed limits are 50 mph?

10 answers · 2 weeks ago
• ### Isn't MC^2 per second equivalent to the product of power times the distance that power travels?

5 answers · 1 week ago