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Results tagged with pressure
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user 282830
This tag is for questions relating to pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid.
1
vote
Pressure on the walls of a balloon
I vote for your second iterpretation: the elastic tension of the balloon takes part in the pressure balance.
Just consider a very strong balloon, it will hold gas inside even in a vacuum condition. …
- 4,314
2
votes
Flowrate of liquid rushing into a bucket
The liquid flows in from height $0$ to $h$ within the upper extension of the lateral surface (assume bucket radius $R$). For height $x$ between $0$ and $h$, the flow rate of liquid can be estimated fr …
- 4,314
2
votes
Entropy for constant pressure
The answer to your question is NO.
Starting with the first law:
\begin{align}
\Delta Q &= d U + P dV \\
T d S &= dU + P dV \\
dU &= TdS - PdV \tag{1}
\end{align}
In equation (1), we read t …
- 4,314
1
vote
Accepted
Proof of pressure of system in molecular dynamics
Apparently, the pressure will come from the second category. Let's investigate (b) first:
The force from the container occurs for $\vec{r}_k$ at the container surface. … Where the gas exerts pressure $P$ to the surface perpendicular to the surface $ P d\vec{A}$, therefore the surface also renders the same force but in the opposite direction $d\vec{F} = - P d\vec{A}$. …
- 4,314
2
votes
How does Pascal's law apply in the case of two openings with different pressures?
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$$
Newton's Law: At point A, the water exerts a pressure $P_1$ to balance the piston's external pressure $P_1$. … Also at point $B$, the piston has pressure $P_2$ from water to balance the external pressure $P_2$. …
- 4,314
0
votes
Equillibrium Position of Partition
The higher temperature part render a larger photon pressure, and therefore push the piston toward the side of lower temperature.
Different from the gas pressure and volume concept. …
- 4,314