Liquid Definition and 990 Threads

Homework Statement Argon (atomic weight 40) exists as a monatomic gas at room temperature and pressure. The density of liquid argon is 1784 kg m−3. (a) Calculate the atomic density (atoms m−3) in liquid argon. (b) Calculate the atomic density (atoms m−3) in gaseous argon at a pressure...

Hii..i have a question maybe it seems a stupid question but I should know answer. We use syringe to take a blood samples and transfer liquids out of the body. I’m talking about take a blood samples with syringe.. Anyway The needle is used to pierce the top layer of the skin, and we can take a...

I have Pt(s)/H2(g)/HBr(aq)/AgBr(s)/Ag(s) The question asks why a liquid junction is not necessary. So I know AgBr is insoluble in water, and AgBr coats the silver metal. I just don't understand why it does not matter that the Br- anions from AgBr mixing with the H+ cations doesn't necessitate...

Homework Statement A cylinder with the length 20cm and radius of 5cm is filled with liquid. The refractive index of the cylinder, its surrounding and the liquid is 1.3. A polarization wave is given in the fluid: E=Eo*exp( i *(ωt-kz)) \hat{x} +c.c. The wave is induced by light with a...

Hi Does nonlinear conductive liquid metal exist? Which and where? thx

The following is part of an experiment about the speed of sound in different depths of a liquid, I'm trying to solve it in Matlab. http://img546.imageshack.us/img546/5952/20120408201206.jpg Here is my attempt: clc clf N=13; d=1900:-100:700; t=[2.62 2.37 2.35 2.25 2.09 1.86...

Good morning, I would like to ask you... Is it possible to make a liquid matter from a solid matter with a help of ultrasound? At first, what happens if the ultrasound travels through a solid matter (for example quartz)? What happens to a solid matter during a positive amplitude (compression)...

I've been looking at various papers which describe the mechanisms and provide calculations describing heat flow into helium. I'm trying to minimize helium loss and am in the market for a new dewar flask/cryostat. I plan on asking the supply companies directly what the proper dimensions are to...

Homework Statement A U-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water. Both sides of the tube are open to the atmosphere. If h1 = 0.52 m and h2 = 0.16 m, what is the density of the liquid? Homework Equations ρ_{u}=h_{1}/h_{2} *...

THE ACTUAL PROBLEM: A vessel of depth H is filled with a non-homogenous liquid whose refractive index varies with y as u=(2 -(y/H)), where y is measured from bottom of the vessel. Find the apparent depth as seen by an observer from above? (Paraxial approximation is allowed) RELEVANT...

Hi, I was wondering if anyone could clarify for me what the correct regime is for treating the electrons in a material as a Fermi gas. When is it that you must use Fermi liquid theory?

Hello Forum, I have been studying phase diagrams. If a pure substance is brought to a temperature and pressure above the critical T and P, it becomes a supercritical fluid, i.e. a substance having properties of liquids and of gases... But how does it look to us? More like a liquid or like a...

Homework Statement An object moving in a liquid experiences a linear drag force: D =(bv, direction opposite the motion), where b is a constant called the drag coefficient. For a sphere of radius R, the drag constant can be computed as b = 6 pi n R, where n is the viscosity of the liquid...

This is probably a stupid question with a simple answer, but please bear with me. Suppose we have a bucket of water that we begin to spin at a constant angular speed. My textbook asked to find the shape of the surface of water, with the hint that the surface would be a surface of constant...

Hi, I am an an artist hoping that you scientists can kindly help me with some advice. I am making a simple liquid mirror as part of a project about reflected image. It will spin and stop and spin and stop etc. I have made a polyester resin parabola as a receptical (so that I can use less...

hello! is it totally true that there is no way to change the volume and pressure of a given amount of liquid? thanks!

\frac{x[Ain]-x[Aout][/SUB][/SUB]}{x[Ain]-x[out][/SUB][/SUB]}=\frac{\sum s^{K}-1}{\sum s^K} (1) for k = 0 to n Final result...

I can't seem to figure out this question. A Thermometer is filled with unknown liquid. It has a square bulb and a stem with cylinder shape. It is found that the volume of the liquid increased by 40% when the temperature changes by 15 Celsius. Calculate the coefficient of expansion of volume...

Hello, I have no idea how to do the attached problem. Could you please help me out? Thanks!

Homework Statement The atom He^3 has spin 1/2 and is a fermion. The density of liquid He^3 is 0.081g/cm^3 near absolute zero. Calculate the Fermi energy \epsilon_F and the Fermi temperature T_F Homework Equations \epsilon_F = \frac{\hbar^2}{2m}(\frac{3 \pi^2 N}{V})^{2/3} T_F =...

We know that speed of sound in liquid is more than in air. Also, velocity of sound = wavelength X frequency. Now there's a change in speed of sound from air to liquid, so, wavelength or frequency should have got changed... But, generally, frequency won't change for an object (correct me...

Hi everyone; I read some of FTIR threads in forums and they were at the different parts of forums so I decided that it's the best place for this question. But if I am wrong please move the thread. I'm new for FTIR measurements. First of all I want to say that I'm doing this kind of...

I am considering the economic viability of a project that must accurately (within a tolerance of, say, 0.5ml) dispense volumes of water from a tank at a constant volumetric flow rate of around 50ml/s. Within the tank, the water may be held at pressures between 1 and 6bar; and at temperatures...

http://en.wikipedia.org/wiki/Timeline_of_the_far_future

How to find copper sulphate resistance. I know that with the increase on concentration to the solution the resistance will decrease because of less water in it and water is a conductor of electricity but i want to know if there is a method of finding the resistance. I was thinking to place...

How to find copper sulphate resistance. I know that with the increase on concentration to the solution the resistance will decrease because of less water in it and water is a conductor of electricity but i want to know if there is a method of finding the resistance. I was thinking to place...

Hi all, Typically, we know that the surface tension for water is about 72mN/m at RT. so do this mean that the surface tension over the whole droplet is exactly the same? Moreover, we know that the Laplace pressure may be different over the whole droplet as the curvature in different parts...

I'm not totally sure this topic should be placed in this forum, since it is not specifically solid state. Anyways, my question is simply why is there a correlation between vapor pressure and the boiling point of a substance, I would have thought that the boiling point would be at any...

Hello, Would putting liquid paraffin (C_{n}H_{2n + 2}) in either a polyurethane or polyethylene bladder (such as a camelbak hydration bladder) create any compounds that have a higher toxicity than that of paraffin itself? I know that all petroleum distillates act as weak solvents and I'm...

Hi, first post, so take it easy on me, I've had an idea for producing metallic objects with high surface area for several years, but lack the necessary physics knowledge to act on it or, really, inclination (and money) to go through years of school to gain such. The idea is as follows: A...

I am working on a desalinization project and need technical advice. These are the basics: If I have a 1,000 sq ft pool of heated water, covered with a chilled baffle, then enclosed in a greenhouse, how much liquid water can I produce through condensation in one day? Any ideas or feedback...

A container filled up to about 2/3rd's with water moves with a unifrom acceleration of 'a' due to a force 'F'. Considering the fact that the defining property of a fluid requires that it's free surface be normal to the net force acting on it, how can the liquid's free surface make an angle given...

I'm looking for information about absorption of light per unit (atom, molecule, stoichiometric) in a liquid vs solid. For instance, imagine a unit cube filled with a saturated solution of, say, potassium permanganate, and shine a laser beam through it from bottom to top and measure the...

A question about Thermodynamics, if someone would help with that... I understand a steam engine that follows the Rankine cycle has basically 4 steps: (a) heating in a boiler; (b) expansion on a piston or turbine; (c) condensation; (d) pump back into the boiler. For many years I have been...

Hi I have people heating liquids in sealed glass Schott bottles in our lab if they cannot find any metal containers in our lab. These are 1 liter bottles they are approximately filling to 500ml with very aqueous solutions. The bottles have not actually broken one, but Schott advises not to...

how do you determine the mass of a liquid using an electronic balance ?:S Anyone knows how ?

I was just wondering that if ozone is a strong[er] oxidizing agent [that oxygen alone] and its boiling point is higher than liquid oxygen [more practical?], then can it be used for applications where liquid oxygen is usually used?

A vessel filled with two liquid how to determine boyant force? A vessel contains oil of density(800kgm-3) over mercury (density 13600kgm-3) A homogeneous Sphere is floats with half of its volume immersed in mercury and other half in oil. What is density of the material of the sphere? How...

How much liquid nitrogen? Hi All, A liquid nitrogen evaporation question for you :) A large metal container is kept at constant temperature of 40 degrees Celsius. This container has a long 10inch diameter tube opening connected to its top. Through a second opening liquid nitrogen...

What is the Mean Free Path of water in it's liquid state? Just wondering how far an electron could travel in water before a collision?

H!, I was wondering, if 1 ml of liquid propane (120 psi @ 70°F) is released into the atmosphere assume 14.696 psi (constant temperature), what will be the change in volume of what used to be 1 ml of liquid propane when changed to gas? From what i heard, the ratio for most gases expanded from...

As we know, when thinking Bernoulli´s equation in one horizontal pipeline, it is p + 0.5 * density * v^2 = Constant. But when thinking a branching of this pipe, then Bernoullis principle for one branch is p1+0.5*ro* v1^2 = C and p1+0.5*ro*v1^2 = C. We think that the two branches are the same...

Homework Statement Three portions of the same liquid are mixed in a container that prevents the exchange of heat with the environment. Portion A has a mass m and a temperature of 94.0 °C, portion B also has a mass m but a temperature of 78.0 °C, and portion C has a mass mC and a temperature...

Does anyone know the experiment where distinct circular patterns appear to emerge in a liquid chemical reaction? This experiment was covered in my thermodynamics class due to its relevance of order emerging from chaos. All I remember about the experiment is that it was not believed at first for...

Hi all, I was trying to find the time required for liquid ejecting from a hole in a tank to reach ground level. The equation given in one of the books is as follows: t = √(2h/g) or sqrt of (2h/g). where h stands for the height of hole in tank shell from the ground level. This...

Homework Statement "Some people say stirring a hot liquid with a thermometer gives a better measurement and some say it yields a worse measurement. Explain with physics how one is actually better" Homework Equations None that I know of. The Attempt at a Solution I know that...

Say there was a container filled with liquid floating in space. What would the pressure of the liquid be? Also would it be affected by the temperature of the liquid? I would assume so since faster moving particles would hit the walls of the container with more force. The reason I'm asking is...

what would the pressure of liquid at a depth be in a container which is slanted?

can a liquid exist in vacuum? Wouldn't it vaporize to gaseous form?

I have the following question/problem of understanding: I am thinking that the only way force or pressure can transfer in a liquid is by water molecules pushing other water molecules, pushing other water molecules etc. If I put a certain pressure in a closed tank to a certain number of water...