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RubiksCube77
Nov Member 2021

RubiksCube77

Posts: 943 Gold Posts by user Forum Profile RuneMetrics Profile
I finished going through buoyancy and am currently reading through the part of the chapter on fluid dynamics. Which I think I'll leave out since it mentioned that it's complicated stuff that is still being researched, but it does go over an ideal model for laminar flow which is a constant flow of a fluid.

Buoyancy happens because an object displaces water, and water exerts a buoyancy force on the object. The buoyancy force is dependent on the mass of the displaced water. I'm sure we know (or at least those who have taken physics) that force is equal to mass times acceleration. In this case it's the mass of the water and the acceleration is acceleration due to gravity. If the buoyancy force is greater than the force on the object due to gravity, then it will float and in the opposite case it sinks. If the forces cancel each other out and the object is in equilibrium, the object just "hangs around."

Density is mass over volume, and in this case the volume of the object and volume of the displaced water is the same, so what we can really say is if the density of the object is greater than the density of water, it will sink. I believe this is all called Archimedes' principle.

As usual this is done by memory, so correct me if you spot an error. Make RuneScape Great Again usually on at 3:00 PM PST
I am the Emperor of Africa, Afrikaneer Engineer, and retired RSOF troll
The Real Bad African (shenanigans moved to YT under an assumed name)

25-Aug-2015 04:42:12

RubiksCube77
Nov Member 2021

RubiksCube77

Posts: 943 Gold Posts by user Forum Profile RuneMetrics Profile
I'm back for now. I was playing another game I can't mention and I'm trying to maintain my #1 spot on pvp in this game. After this week it's back to me trying to go for #1 again so I can become Emperor in the game. Wish me luck lol.

I'll try to explain how an airplane stays in air.

What I remember about flow is the equation of continuity.

(Velocity 1)(Area 1) = (Velocity 2)(Area 2)

So if Velocity 2 was to increase then Area 2 must decrease for this to remain true and vice versa.

(this will be harder to explain since there isn't a diagram)

If we were to shoot multiple streams of air at a wing, we notice that the streams under the wing are about the same as the streams that aren't near the wing. But if we look at the stream of air above the wing, it is smaller which means that velocity is bigger.

A bigger velocity correlates to a smaller pressure on the top of the wing. Since the pressure is less on the top than the bottom of the wing, the net force points up on the wing keeping the airplane in air. After all pressure is defined as force over area or N/(m^2)

This was done by memory, so if you spot an error, make the correction. Make RuneScape Great Again usually on at 3:00 PM PST
I am the Emperor of Africa, Afrikaneer Engineer, and retired RSOF troll
The Real Bad African (shenanigans moved to YT under an assumed name)

31-Aug-2015 19:23:42

RubiksCube77
Nov Member 2021

RubiksCube77

Posts: 943 Gold Posts by user Forum Profile RuneMetrics Profile
Gaming has kept me from learning more from my physics book, but here's something quick.

Everything with mass has gravity, but it's is negligible compared to the gravity of Earth.

After all to find the free fall acceleration, it's (GM)/R

G= gravitational constant (which I believe is 6.67 x 10^(-11)

M= Mass of planet (or in this case object)

R= Radius of planet (or in this case object)

This is all done by memory, and if you spot an error feel free to make the correction. Make RuneScape Great Again usually on at 3:00 PM PST
I am the Emperor of Africa, Afrikaneer Engineer, and retired RSOF troll
The Real Bad African (shenanigans moved to YT under an assumed name)

02-Sep-2015 18:37:43

RubiksCube77
Nov Member 2021

RubiksCube77

Posts: 943 Gold Posts by user Forum Profile RuneMetrics Profile
Gaming is still keeping me busy, and will keep me busy again later today. Unfortunately it has also kept me from studying as well, so that's bad right there lol.

Here's something quick.

Oxidation-reduction is a chemical reaction where an atom/molecule is either gaining an electron or losing an electron. If something is oxidized, it loses an electron. If something is reduced, it is gaining an electron. It is this chemical reaction that makes a battery provide power.

As usual this is done by memory, so call me out if you spot an error. Make RuneScape Great Again usually on at 3:00 PM PST
I am the Emperor of Africa, Afrikaneer Engineer, and retired RSOF troll
The Real Bad African (shenanigans moved to YT under an assumed name)

05-Sep-2015 19:23:43

jour vert

jour vert

Posts: 3,134 Adamant Posts by user Forum Profile RuneMetrics Profile
Done these at some point, both lab projects and at home.


Safe

Soda Balance Beam

Put 100ml of water in a soda can. Tilt slowly to one side. Move it with your finger.

Charles' Law

Put Ivory soap in the microwave on high for two minutes. Soap molecules have sensitive reacation to air and expand rapidly. Gas temperature increases and so will the volume.

Super Breath Refreshments
You will need liquid nitrogen, a liter. Whipped cream. A large tray. Pour the nitrogen into the tray and spray a zig-zag line all over the fluid. Beak the cream into pieces as they begin fizzing out. Wait until it hardens and put in your mouth ^_^ Suck on it and blow out through your nose and mouth.

Milk and Red Bull Experiment.

Mix together in a cup at your own risk. Leave and come back after two hours. The white surface at the top shows how much sugar you ingest in body upon energy drink intake. Not for the upset stomach, I almost fainted. Run away and cover nose while you can.



Dangerous

Explosive Volcano Pie. Mix potassium and sodium nitrate and sugar together in a bowl outside. Heat the mixture in a saucepan. Stir until it turn light brown as the salts absorbs the sugar and melts into pie filling. Pour on a pie shell. Let it set and attach a fuse. Light it on fire. Will burst into flames and release ash like a volcano. If people ask what you're making, I would advise to answer at your own risk.

Hard as Rock

Gather dry ice, cryogenic napalm, a hammer, a chewy sweets like Starburst or fruit chews. Wear safety goggles and gloves. Freeze the liquid until it's sub-zero but still able to pour into a glass. Gently drop the dry ice into the glass with caution. When it starts to react place the candy inside. Wait a few minutes and removes with pliers. Do not use your hands or fingers, it will freeze on touch. Take out the candy after a few minutes and see how hard it is to break with a hammer. Did this one in school :) If you would like something to watch on Netflix, here you go = One Piece ^_^

11-Sep-2015 09:42:31

RubiksCube77
Nov Member 2021

RubiksCube77

Posts: 943 Gold Posts by user Forum Profile RuneMetrics Profile
Thanks for the bump kewl

I finally got what I wanted from a game I can't mention, so now I'm not going to be playing it as much as I want to for awhile. Which means it's time for me to come back to RS.

I just finished reading the chapter on fluids and elasticity, and am now going to move onto the section on thermodynamics.

The gist of the principle of elasticity is the ability for a solid to be stretched and be able to return to its original form as long as the solid is not stretched beyond its elastic limit. We notice that elasticity is similar the nature of a spring and this is due to the spring like bonds of the atoms in a solid.

We know that Hooke's law is Force = (spring constant) change in X or F = K (delta)X

In the case of elasticity, it is Stress = (Young's modulus) Strain or F/A = Y ((delta)L)/L

This is done by memory, so if you spot an error, please make a correction. Make RuneScape Great Again usually on at 3:00 PM PST
I am the Emperor of Africa, Afrikaneer Engineer, and retired RSOF troll
The Real Bad African (shenanigans moved to YT under an assumed name)

12-Sep-2015 04:25:49

Adds
Nov Member 2011

Adds

Posts: 9,925 Rune Posts by user Forum Profile RuneMetrics Profile
String theory predicts 10 dimensions in the universe. Also string theory incorporates super-symmetry (conjectured symmetry of space and time) as all bosons have fermion superpartners and vice versa!
Doubt kills more dreams than failure ever will

24-Dec-2015 04:15:47 - Last edited on 24-Dec-2015 04:16:32 by Adds

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