Liquid Definition and 1000 Threads

The forces of a liquid pressing against a surface add up to a net force that is perpendicular to the surface. I cannot visualize this. Could someone help me out diagrammatically here?

Homework Statement I have been searching online for help with this equation but have found nothing at this stage. I am looking for an equation to satisfy the Volume of a Frustum of a cone. The liquid level is measured via a sensor located in the centre point, top circle(area) of the...

I want to know how to increase the surface area of a liquid without doing any work. Heating would be counted in work done.

Homework Statement This question is a product of my own mind- Refer Figure. Suppose the value of P= 2Patm, can 2Patm fall to Patm before the liquid levels with the hole-level? In other words, can there be a liquid column above the hole?

Homework Statement A cubical block of coeffficent of linear expansion \alpha is submerged partially inside a liquid of coefficient of volume expansion \gamma. On increasing the temperature of the system by \DeltaT, the height of the cube inside the liquid remains unchanged. Find the relation...

I am not sure if this is the correct place to post, but here goes. I have to do an experiment on liquid cooling, using 2 types of liquid cooling blocks, one fin based, one channel based. The liquid used is water, and the pumping system is the same. The cooling blocks are attached to a...

Homework Statement The apparatus shown consists of four glass columns connected by horizontal sections. The height of 2 central columns B and C are 49 cm each. The height of the liquid in A and D is 52.8cm and 51 cm resp (measured from the baseline). The water columns are maintained at...

A closed bottle contains a liquid. The bottle is shaken vigorously for 5 minutes. It is found that the temperature of the liquid is increased. Is heat transferred to the liquid? Is work done on the liquid. Neglect expansion on heating. I think the temperature increases due to the internal...

Homework Statement Hi guys, I'm a little lost on what should probably be a simple question Using the following combustion reaction (C7O2H6)s + 7.5 (O2)g --> 7 (CO2)g + 3 (H2O)l the equation indicates that water produed by the reaction is liquid water not water vapor. Is this correct...

Can anyone recommend a white light source to be used in a cryostat down to 77 K? We are using it in temperature-dependent studies of PV devices. Currently we have an incandescent bulb which has shifted its spectrum towards red over time and we're looking for a replacement. It would be nice to...

Homework Statement The limbs of a manometer consist of uniform capillary tubes of radii 1.4 x 10^-3 m and 7.2 x 10^-4 m. Find out the correct pressure difference if the level of the liquid (density 10^3 kg/m^3 and surface tension 72 x 10^-3 N/m) in narrower tube stands 0.2 m above that in the...

This might sound trivial, but I've always been curious as to why exactly when you put your finger on the top of a straw in a drink and lift it up, the liquid stays in it. We're studying pressure and fluids right now in my physics class, and I have a general idea that it has to do with the...

Hello, I am trying to develop a formula to calculate the force of water sloshing against the inside of a cylinder. While there has been a lot of development of baffles and structures designed to minimize the effect of sloshing liquids in tanks, we are doing some studies of liquids in small...

I want to design a model for falling spheres in a Newtonian fluid and I just want to make sure I've got everything right. Are these all of the forces that apply on an object in a liquid? I have the following formulas...

Hi, Can anyone suggest a conducting liquid that does not get electrolysed when current passes through it ? By liquid i mean anything, a salt solution, a liquid metal...The only restricting factor is that is should be in liquid state at room temperature(i.e does not require extra...

[/tex]Homework Statement The differential of the internal energy of a surface of a liquid with surface tension \gamma and area A may be written as dU=TdS+\gamma dA Write down the corresponding form of the Helmholtz free energy F= U -TS. Using the fact that these equations involve exact...

(apologies for the formatting, mixing LaTeX and regular text looks ugly, but I don't know how to do it otherwise) Homework Statement This is problem 3-7 from Thornton and Marion's Classical Dynamics. A body of uniform cross-sectional area A = 1 cm2 and of mass density \rho=0.8 g/cm3 floats...

I would have thought no, but my textbook appears to imply that the liquid being boiled in a confined space doesn't at its normal boiling temperature but does boil at a higher temperature. The reason I don't think a confined liquid can boil is because the external pressure in a confined liquid...

Hi all, I came across your forum looking for some help to settle a debate. A few fellow home brewers and I are debating what factors influence the rate of loss during a boil. The original question came from a brewer who switched to a wider pot and discovered that he lost more liquid over the...

Homework Statement My book says that 'A liquid gets heated up when it evaporates' Homework Equations The Attempt at a Solution I heard the opposite- the liquid cools itself. Please help

Water is emptied from a spherical tank of radius 24 ft. The water in the tank is 8 ft deep and its level is decreasing at the rate of 2 ft/ min. At this time, what is the rate of change of the radius at the top of the water?

Is the enthalpy (H) of liquid water greater than that of the same quantity of ice at the same temperature?

Hi I would like to consider the thermodynamics of boiling a liquid to a gas. I am assuming there are no intermolecular forces in a gas. I am also presuming intermolecular forces in a liquid are exothermic, though people hardly ever talk about the energy of IMF Lets assume the the...

what imean by natural is...u know how motts comes in regular and natural? well i bought the natural kind..but i bought store brand. if i wave my hand behind the bottle i can barely see it...(the shadow of it) with gatorade i can see it much clearer..but idont like gatorades... one site...

Hi I'm trying to review some fundamental chemistry and I want to make sure I understand the difference between a liquid and a gas. I will build this question up in stages. I'd like to consider propanone. I believe the intermolecular forces (IMF)in liquid propanone are dipole-dipole and...

Hi I have a question about the capillary force between two hydrophilic surfaces. I am working with small cantilevers (5-50 um long, 5 um wide, 200 nm thick). If L represents the lever, which is hydrophilic, and X represents some bulk material (also hydrophilic), a profile of the lever looks...

Consider a vertical pipe partially filled with liquid. The pipe is open at the lower end and closed at the top. See the attached picture. Will the liquid fall out or not? In a small diameter pipe a stable meniscus will form due to surface tension and prevent the water from falling out. In a...

If I Press gas to a pressure in which it changes to liquid. What would be temperature of this liquid after?

Hello. This is probably a really dumb question, but I was wondering how the ph system works in relation to making a ph 7 liquid (which would be water and salt, right?) The way I was thinking was if you have an acid with a ph3 and a base with a ph8, and you wanted to mix them to produce a ph7...

Homework Statement an aluminum object with volume 100 cm^3 and density 2700 kg/m^3 is suspended in ethyl alcohol (density 790) by a string. what's the tension in the string? Homework Equations Fy = Fb + T - mg T = mg - Fb Fb = p_f * v_f * g = p_o * v_o * g The Attempt at a...

I just recently had a conversation, where we discussed if liquid is getting colder as it moves along thin tube where it "normally" wouldn't. And if it does, doesn't it mean we have a system that makes things colder without warming anything around it? Which I thought wasn't possible.

If light travels at a certain speed through fiber-optic cable, would the light get to its destination faster if the fiber-optic cable was actually a liquid, and the liquid had a substantial velocity in the same direction as the light?

http://www.msnbc.msn.com/id/29900981/ "One of the first compilations used molten antimony and magnesium as the charge holders with a layer of sodium sulfide between the two."How does this work? What chemical reaction is taking place between the metals and the salt?

In a batch of liquid helium (say < 8* K.) is there a mixture of both ortho and para-helium, or is it only ground state para-helium.? I was under the impression that ortho was a meta-stable state which cannot decay to ground state Para-helium by radiative emission, but by meta-stable we are...

I'm supposed to do a little demonstration to some middle school kids and one thing that's planned is sticking a balloon in liquid N2. The guy who showed us what they want (who doesn't appear to know anything about science) claimed that the liquid you see in the bottom of the balloon when you let...

Hello, I’m new to this forum, and this may seem elementary, but I can’t be sure of my thinking on the subject, so I’ll post the question here. The question concerns the following. I have two household spray bottles, each of the same size. Each has its hose down nearly to the bottom of...

A concave astronomical telescope mirror may be made by rotating a circular tank of mercury. Find an expression for the shape of the surface in terms of the density of mercury, the radius from the centre and the rotaion rate so far I've come up with: KE=1/2MV^2 In the case of circular...

Instead of drag racers injecting nitrous oxide and extra fuel with it . Why don’t they just inject liquid oxygen with more fuel . for more power , Any input will be much appreciated.

Homework Statement How would you use chromatography to determine whether an unknown pure liquid is 1-pentene, cis-2-pentene, or trans-2-pentene? Homework Equations The Attempt at a Solution I looked up the boiling points of the three and see that 1-pentene is lower, but the cis...

How to keep liquid flow rate constant! hi, my grad. project is automated filling machine and am going to use a gravity liquid (water) filler tank ... my question is how to keep the flow rate from the tank nozzle constant while the liquid level in tank is changing as it fills every bottle ?

hello guys how can i have liquid water at 120 c ?

When working with liquid hydrogen or LH2 as a fuel how can you determine how much energy will be released when you break the bond. And an off topic question here can you determine how much force that energy that will produce.

Homework Statement Determine the specific heat of a liquid USING a resistance heater. Exact problem - Design an experiment complete with instrumentation to determine the specific heats of a liquid using a resistance heater. Discuss how experiment will be conducted, what measurements need to...

I'm constructing a pulsed solenoidal accelerator (coilgun) and am looking to boost efficiency by supercooling the copper wire in the coil. I'm also getting a quote for a high-temperature superconductor film to use in place of the copper wire. In either case, I will need submerge the coil in...

Homework Statement Part 1: A liquid of density 1392 kg/m3 flows with speed 1.94m/s into a pipe of diameter 0.28m. The diameter of the pipe decreases to 0.05m at its exit end. The exit end of the pipe is 4.2 m lower than the entrance of the pipe, and the pressure at the exit of the pipe is 1.4...

Are there any substances that are liquid in a vacuum? It seems mercury should be liquid. If so, what forces keep it from solidifying, yet not disipating into a gas?

Homework Statement if the flow rate of a liquid from a 10mm hole in a storage tank holding 5m of a liquid with a density of 490 kg/s, is 0.207 kg/s how far will this stream travel before it hits the ground and will it be contained by a dike 1 m away that is 1 m highHomework Equations Q=pAV =>...

how can i calculate density of a liquid pumped in a closed circuit and i don't know the nature of it ?

Earlier, I had posted that I thought that I had made liquid oxygen. People seemed skeptical that it would work, but I did an experiment to prove the concept. On a ring stand, I had some burning paper towel. I put some liquid nitrogen in a pie tin and allowed atmosphere to condense on the...

1. When liquid oxygen, being paramagnetic, is placed in a magnetic field it possesses magnetization in direct proportion to the field strength. 2. Does this mean that it emits a magnetic field and is itself a magnet while in this field 3. or is it just a part of the larger magnetic...