pressure's questions - Chinese 1answer

1.725 pressure questions.

I am constructing a gravity flow water system. I have 100ft point where I can put my tank. My question is does the size of my tank matter? I am using a 1" pipe. Will I get more pressure if I use a ...

If you look at a (white, opaque) Starbucks coffee lid (and the lids of many other coffee brands as well) you will see in addition to the obvious sip hole, one or more tiny perforated holes on the top ...

Specifically, I am trying to wrap my head around this scenario but can't do so solely by thinking about the weight of the fluid. Imagine a perfectly still lake. If you dive into the lake, the ...

Ordinarily, we assume that a gas expands to fill it's container, however, I've had the thought that at low enough densities, this may not be possible, because the force from pressure would not be ...

i have a tank filled with n moles of gas with a greater pressure than the atmospheric. the pressure difference is deltap. there is a hole with surface s and the gas flows out of it.the temperature is ...

If we fix a piston in the mouth of a cylindrical container in such a way that the piston settles when the pressure from outside the piston is equal to that of the gas within the container, and ...

For many years I have wondered about the physics in a scene from the James Cameron movie, "The Abyss", where a submersible sinks because of small leaks caused by a crash. In this scene, Ed Harris' ...

I am referring the paper on GERG-2008 equation of state. I am interested in calculating the properties of ideal mixtures of real gases. The GERG-2008 EOS is in Helmholtz free energy and hence the ...

Experiment: We have a cylinder with a piston that is essentially weightless, frictionless, and exposed to atmospheric pressure. The cylinder has a volume of 2V, but half of it is filled with water and ...

I'm trying to understand an 'approximate derivation' of the flow rate of gas down a pipe at low pressure from my book (an example problem). It uses the result that the flux of a gas is given by $\...

What makes a piece of paper or other material hard to pull away from the end of a vacuum cleaner once it's covering the opening? What force are you acting against when you try to pull it away? Also, ...

I don't understand why in (Ideal) Rankine Cycle we assume that pressure remains constant at the boiler and the condenser. Shouldn't water pressure change, when water goes from liquid to vapor (boiler) ...

The $\Lambda$CDM model assumes collisionless dark matter, so that its pressure $P=0$. But what are the best experimental constraints on $P$? I guess on $P/\rho$ in fact…

I have a test stand that is used for testing hydraulic pumps. We are adding a pump that we have never tested before and we are getting low flow readings. Will increasing piping to one size bigger than ...

Working on the pressure equation from the linearized euler equations, I stumble across a very simple problem : How, from the pressure solution of the specific equation (see http://www.acs.psu.edu/...

I know the expression for excess pressure inside a LIQUID DROP is : $$ P_2 - P_1 = 2S/R $$ where $P_2$ is the pressure just inside the liquid drop and $P_1$ is the pressure outside the liquid drop ...

I am trying to combine various elements and at high pressure, e.g. $2000\,\mathrm{atm}$ or $2 \cdot {10}^{8} \, \mathrm{Pa}?$ How could these pressures be achieved for a gas with a volume of about $1\...

I'm not sure this is the right place to ask this "homework" question, but I have a real life problem that requires calculation and I do not have the math knowledge to make them myself. I have bought ...

I am in class $9^{th}$, I'm reading my physics book in which it is written that: $$\mathrm{Relative\ Density} = \frac{\mathrm{Weight\ of\ solid\ in\ air}}{\mathrm{Loss\ of\ weight\ of\ solid\ in\ ...

Why is it that a typical auto-shop compressor can easily fill big truck tires to +80 psi, but when used as a vacuum pump the same motor/valves can typically only pull -12psi or so of vacuum?

Picture this: A small airplane parked in a field, running at full power, developing 2,500 pounds of thrust from the single propeller. (A drawing would really help, but I'm new to this forum and don't ...

Which pressure is measure using measuring device in a pipe flow. My first intuition that it is the static pressure. This is confirmed by this Wikipedia article (link) The concepts of total ...

The (local) instantaneous virial stress is given by: $\sigma_{ab}(\vec{r})=- \sum_{i=1}^N \delta(\vec{r}-\vec{q}_i) \left(\frac{p_i^a p_i^b}{m_i} + \frac{1}{2} \sum_{j=1, j \neq i}^{N} (\vec{q}_i-\...

If I were to inflate a balloon with Helium inside it and were to leave the balloon under the water,will the balloon fly high in the sky cutting its way through water.If it does or doesn't somebody ...

I was doing an experiment on water hammer in pipes. During the experiments, in several cases, the transducer reported negative pressure, as low as -1.9 bar gauge! But I have read that it is not ...

If I take a half full bottle of water, seal it with a pressure gauge, and wait a few days then it will be at equilibrium. If I observe the pressure, that would be the water vapor's pressure. However, ...

The below picture is of a aspirator pump. If we press the bulb at A the air in it with density $\sigma$ will flow out with velocity $V$. This would cause lower pressure at B and hence the liquid with ...

Hydrogen is the lightest element, so it's cable of lifting the most weight in out atmosphere (probably not the best terminology there, but you get the picture) Would hot hydrogen (in the same sense ...

When you fill the sink with water and then allow the water to be drained, the water forms a vortex.. And then it starts to follow a curved path downwards by effects of gravity. Why this phenomena ...

So I've just been watching a TV program where two people open a canal lock, and it occurred to me: aren't you pushing against the entire pressure of the river when you push the lock doors open? Why is ...

It's easy for me to imagine gas pressure on a molecular level. More pressure means that more molecule bounce against the thing you are measuring, or the molecules hit it with more speed or the ...

I want to calculate the under water pressure, taking into account the compression of water. I derived a formula, but apparently the function has a vertical asymptote, meaning that the pressure ...

What pressure is exerted by 8g (eight grams) of N2O gas on the walls of a container that has about 0.5l (half of liter) of volume? Will the pressure be the same in case of 8g of CO2 gas? Background: ...

I want to start mushroom farm for that I have to maintain high humidity and low temperature for that ,So i finding solution for how to get high humidity and low temperature at low cost.

It is quite easy to compute the first derivative of vapor pressure with respect to temperature from a cubic equation of state at least at the critical point since there is a continuity with the ...

since space does not contain air, is it possible to create a soap bubble without air in space or in vacuum and can can you explain why so? OR will there be any possibilities for a bubble in such kind ...

What is the molecular explanation of Pascal's law? Let us now consider what happens when we change the pressure on a fluid contained in a vessel. Consider a horizontal cylinder with a piston and ...

I am trying to find the sound amplitude or level produced by a fan, knowing its RPM. Is there a simple formula for it? What other parameters does it depend on? Assume I have all the fan properties, ...

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