[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 15 KB, 223x226, surface tension wasp.jpg [View same] [iqdb] [saucenao] [google]
8491897 No.8491897 [Reply] [Original]

why do dense things sink more?

>> No.8491902
File: 505 KB, 424x550, IMG_4566.jpg [View same] [iqdb] [saucenao] [google]
8491902

The same way magnets work.

>> No.8491903

>>8491897
Gravity

>> No.8491955

>>8491902
how do magnets work?

>> No.8491957

>>8491903
that doesnt explain the reason why dense things sink and less dense things don't

>> No.8491958

>>8491897

i want to know how the behaviour of the particles in something dense make it sink vs a non-dense thing

>> No.8491960

>>8491897
Gravity has a stronger force on denser objects.

>> No.8491965

>>8491897
More mass -> More weight.
Less volumne -> Less surface for pressure to act upwards.

>> No.8491968

>>8491960
but why?

>> No.8491970

>>8491965
surely it cant be to do with weight though or ships wouldnt float.

>> No.8491993

>>8491958
Say you have an object with volume V, and we place it in water. The bouyant force the object will recieve, is directly proportional on how much mass of water the object pushes away, namely the volume V times the water's density.
If the gravitational force acting ont the object is smaller than the bouyant force, it floats. If they are equal - it's remains stationary. Similarily, if the bouyant force is lesser than the force of gravity, it sinks.

This is pretty basic classic mechanics. Please correct me if I am wrong somewhere.

>> No.8491996

>>8491993


ah i seeee

>> No.8492004

The way I like to think about it is in terms of energy. Things in nature tend toward lower energy states, the system will have less total potential energy if the denser objects are on bottom because that would place more of the mass nearer the source of gravity.

>> No.8492078

>>8491957
f=ma

>> No.8492080

>>8491970 see >>8491993

>> No.8492083 [DELETED] 

What operation gives this result

A=
[a b c
d e f
g h i]
B=
[x
y
z]

f(A,B)=
[ax bx cx
dy ey fy
gz hz iz]

is there a name for this type of matrix product?

>> No.8492086

A basketball can push past a group of tennis balls far more easily than tennis balls can push past basketballs.

>> No.8492101

>>8491993
Why doesn't the atmosphere work according to this? How can a mix of ~80% nitrogen and ~20% oxygen happen when they weigh different amounts and don't react with each other?

>> No.8492116

>>8492101
I'm gonna go with "gravity is pretty fucking weak".

>> No.8492119

>>8491897
Buoyancy my nigga.

>> No.8492125

>>8492116
If gravity is so weak then why is it the main driver for the thermohaline conveyor belt?

>> No.8492149

>>8492086
>>8492080

guys gtfo of this thread.

>> No.8492357

>>8491970
Ships float because they have air in them

>> No.8492380

>>8492125
Snide remarks aside, I'm really clueless about chemistry which I suppose is where the answer lies. I have no idea why some things mix and some don't.

>> No.8492450

>>8491902
Thats totally true

>> No.8492555

>>8492357

people really should stop answering old posts which have since been resolved.

>> No.8492585

>>8492101


They have a similar specific gravity.

There are other gasses that have different specific gravities that either sink below or float above a layer of oxygen, like carbon monoxide.

>> No.8492600

>>8491968
Force is proportional to mass, with is apparent from F=ma where m is mass and a is acceleration. Furthermore, Density is proportional to mass (vice-versa), as D=m/V where D is density, m is mass, and V is volume.
Re-write F=ma as F=DVa, and let Va be a constant. Therefore F is directly proportional to D. Btw you must be 18+ to post here