Buoyant forces and temperature

AI Thread Summary
The buoyant force on an aluminum sphere submerged in water will remain largely unchanged if both the sphere and the water are heated, provided their volumetric expansion rates are similar. As temperature increases, the density of water decreases while the aluminum expands, but if these changes offset each other, buoyancy remains constant. The buoyant force is calculated as the weight of the displaced water minus the weight of the sphere. Understanding this relationship clarifies the physics behind buoyancy in varying temperatures. This discussion effectively addresses the initial curiosity regarding buoyant force behavior with temperature changes.
kmkindig
Messages
4
Reaction score
0
I was just looking through an internet site and there was this question... Will the buoyant force acting on on aluminum sphere submerged in water increase or decrease if the temperature of both is increased. Why? This question just sparked my interest because i am not a physics major but now a little about physics and didnt know the answer. Thanks!
 
Science news on Phys.org
If the volummetric expansion of the aluminum is the same as the density decrease of the water, then there is no nearly no change in the buoyancy, because the buoyancy force F is equal to the mass of the water M the sphere displaces minus the mass of the sphere m, times g: F = (M-m)g.
 
Hey that helps out a lot! Thank you very much and that conquers my curiousity. Thanks again
 

Thread 'Entropy and configurations of microstates'

I was watching a Khan Academy video on entropy called: Reconciling thermodynamic and state definitions of entropy. So in the video it says: Let's say I have a container. And in that container, I have gas particles and they're bouncing around like gas particles tend to do, creating some pressure on the container of a certain volume. And let's say I have n particles. Now, each of these particles could be in x different states. Now, if each of them can be in x different states, how many total...
View full post »
Thread 'Why work is PdV and not (P+dP)dV in an isothermal process?'

Thread 'Why work is PdV and not (P+dP)dV in an isothermal process?'

Let's say we have a cylinder of volume V1 with a frictionless movable piston and some gas trapped inside with pressure P1 and temperature T1. On top of the piston lay some small pebbles that add weight and essentially create the pressure P1. Also the system is inside a reservoir of water that keeps its temperature constant at T1. The system is in equilibrium at V1, P1, T1. Now let's say i put another very small pebble on top of the piston (0,00001kg) and after some seconds the system...
View full post »

Similar threads

Speed of sound in steel dependance on temperature
Replies
1
Views
4K
B Do the Equations for Apparent Weight and Buoyant Force Contradict Each Other?
Replies
6
Views
2K
Yes, that makes sense. Thank you for pointing that out.
Replies
8
Views
2K
Container of Liquid Accelerated Upward
Replies
1
Views
3K
How Does Temperature Affect Sound Wave Velocity in Air?
Replies
2
Views
3K
What Happens to the Buoyant Force on a Beach Ball When Submerged?
Replies
4
Views
4K
I Yet again about (real) gas compression
Replies
20
Views
3K
Buoyant Force and Archimedes' Principle
Replies
13
Views
3K
Is the buoyant force proportional to the mass?
Replies
10
Views
4K
Oscillation of a boat in still water (Metacenter and Center of Mass)
Replies
24
Views
2K

Hot Threads

Recent Insights

Back
Top