The mass-balance tag has no wiki summary.
5
votes
3answers
505 views
Explain how (or if) a box full of photons would weigh more due to massless photons
I understand that mass-energy equivalence is often misinterpreted as saying that mass can be converted into energy and vice versa. The reality is that energy is always manifested as mass in some ...
5
votes
1answer
214 views
Is this static mechanical balance possible without trickery?
On damnlol.com, I came across this picture:
http://www.damnlol.com/hello-god-i-have-a-fault-to-report-7549.html
My question is: Is this possible without glue? If not are there similar situations ...
4
votes
2answers
656 views
Calculate stainless steel pole necking limit
Background
Trying to determine how much weight a post can support without necking when a monitor is attached to an articulated arm: a cantilever problem.
Problem
There are three objects involved in ...
3
votes
1answer
348 views
Can we explain physical similarities between Black Scholes PDE and the Mass Balance PDE (e.g. Advection-Diffusion equation)?
Both the Black-Scholes PDE{*} and the Mass/Material Balance PDE have a similar mathematical form of the PDE which is evident from the fact that on change of variables from Black-Scholes PDE we derive ...
2
votes
1answer
120 views
The role of dark matter in black holes and star formation
In my understanding, there exists a critical mass for which a star needs to be in order for it to collapse into a black hole. This also applies to a certain critical density of gas in order for stars ...
2
votes
2answers
158 views
Does the recent re-count of stars in elliptical gallaxies affect our understanding of the universal mass balance?
I've seen several popular reports of a new count of low-mass stars in elliptical galaxies (here's one).
Edit: Pursuant to several correct comments I've changed the title to agree with the actual ...
1
vote
1answer
79 views
Stability of balanced masses with different surface areas
Say I have this setup. The two round objects have equal mass and their centers of gravity at the same distance from the shaft. The objects only differ in that they have different surface areas ...
1
vote
1answer
90 views
Flow of freezing liquid or a melting solid
If a liquid is freezing, is equation of continuity violated? As the liquid flows, some portion of it is getting frozen. The mass of the fluid thus keeps dropping. Similarly, when a molten fluid flows ...
0
votes
2answers
1k views
What are the ideal centers of mass and rotation for a steadicam?
For those who don't know what a steadicam is, I'll explain it in two points to give a basic idea. If you know what a steadicam is, skip to point 3.
1) A steadicam is a stabilizing mount for a motion ...
-4
votes
0answers
26 views
What formula is used to determine weight distribution using two people to lift 100 lbs over their head? [closed]
Trying to determine actual weight and force required to perform a two man deadlift of an container weighing 100lbs
