Liquid Definition and 990 Threads

Ok, so if there is a better place for this, please do move it mods, I just couldn't find a place to post project related stuff so I chose this part of the site. Anyways, I'm working on a homemade liquid rocket engine all based around a CO2 cartridge combustion chamber. This project also has the...

Red light travels from air into liquid at an angle of incidence of 390 and an angle of reflection of 170. Calculate the wavelength of the red light in the liquid if its wavelength in air is 750 nm. can anyone give me a clue? ,,, please..

It's been a looooooong time since I delved into fluid properties. I'm trying to predict flow based on a known static head. I have a water column which will result in 6 psig of static head. The height of the water column will not change during the flow. I know the downstream piping will...

Hi friends! Can somebody tell me anything about potential hole at liquids? Thank you!

anyone know equation for power generated by a fluid? Appreciate

If one wishes to calculate internal field for a liquid dielectric , what will be the assumptions?can anyone guide me through mathematical steps...

Bette Nesmith Graham is credited with the invention but she had help. Anyone know who and why she needed the help?

What kinds of problems could a supercooled liquid lead to in a chemical plant?

Two identical cylindrical vessels with their bases at the same level each contain the same liquid of density 1.3*10^3 kg/m^3. the area of each base is .0004 m^2. In one vessel the height if the liquid is 1.56m and in the other 0.854. Find the work done by gravity in equalizing the levels...

a cube with edge length L=.600m and mass 450kg is suspended by a rope in an open tank of liquid of density 1030 kg/m^3. The top of the cube is L/2 deep in the tank. Find the tension in the rope. Vol=.600^3=.216 Area of top side of cube=.6^2=.36 \sum F=0 \Rightarrow...

Yoy guys, I am working on an invention recently which is related to liquid crystals. I want to know how liquid crystals in a forehead thermometer works. Or basically, how a forehead thermometer works! Thx guys!

In the Molar mass of a Volatile liquid experiment does the temperature of the vapor equals the temperature of the boiling water bath?

Hello, I was led here when I did a search on "Chloramines". This is what has happened. I moved into an apartment. I was cleaning off my stove with Joy dish soap and a scrubby sponge, and tap water. I kept getting a really strong bleach smell. I found out the maintence used a product...

The following is also posted in the Chemistry forum. This is a cross-post. If this is not allowed, it's fine with me if this post is deleted by an admin. I would like to know how to predict when a flow of liquid---dichloromethane, actually---freely flowing downward through a small hole...

I would like to know how to predict when a flow of liquid---dichloromethane, actually---freely flowing downward through a small hole (varying from around .05 to .001 cm) will exit as droplets instead of flowing in a steady stream. I have been bouncing around the Internet for a good while now and...

Hi all. I am designing a liquid delivery system that should handle liquids of volume like twenty ml to a hundred ml. Ordinary pumps would not work here. I am thinking of using a servo motor. But I would need to control the speed as well as displacement of the servo motor, is it possible? What...

Homework Statement An ultrasound unit sends a 2.40 MHz sound wave into a 25.0-cm-long tube filled with an unknown liquid. A small microphone right next to the ultrasonic generator detects both the transmitted wave and the sound wave that has reflected off the far end of the tube. The two sound...

Is it physically possible to have planets consisting entirely of liquids? I don't mean an ocean world, but a planet with nothing but liquid?

Imagine a 1-molecule thick layer of liquid, evenly dispersed across a perfectly flat surface. This surface is (for this thought experiment) impenetrable and sound does not pass through it; it is unable to resonate or vibrate. If we apply sound waves or some other frequency/wave generation to...

I recently read about a proposed liquid mirror telescope to be constructed on the moon. My question is one of mechanics, hence this not being in the astronomy section. My question is regarding the shape of the surface of a rotating liquid. The design will have a dish containing a thin layer...

If I'm a small particle in a liquid in temperature T, molecules from every direction collide in me f times per second, what is the probability that I'll collide with a particle with energy ε? What is the average energy for collisions? I think I can rephrase it to "how many times per second...

Liquid Hydrogen Boil off ? I am a little bit confused as to what boil off is, I can only assume it is the loss of gas but it is still unclear to me as to how a gas can escape from a steel container. Can anyone try to explain this to me better. Thank you very much

Homework Statement When an insoluble bubble rises in a deep pool of liquid, its volume increases according to the ideal gas law. However, when a soluble bubble rises from deep submersion, there is a competing action of dissolution that tends to reduce size. Under practical conditions, it has...

I've got a very small tube (about .01" outer diameter, I can't recall the inner diameter $D$ at the moment) of length $L$. It's going to run from a helium bath to a near vacuum ($\Delta P$ ). I'm trying to calculate the length of this tube required to get a flow of $\dot{N}$ (in mols or liters...

hi can anyone tell me the concept of liquid batteries.

Ahoy, I'm trying to do a calculation of the electron-electron self energy of a Fermi Liquid, which is supposed to exhibit a dependence on the square of the temperature of the system. I've read through the first six chapters of "Green's Functions for Solid State Physicists" by Doniach and...

Okay obviously a hypothetical situation, this planet has a radius R, uniform density, and it doesn't rotate. Pressure in a liquid is given by p=\rho g d where d is the depth. So the liquid pressure a distance r from the centre of the planet is. p=\rho g (R-r) (where r<R) But g is also...

Homework Statement What mass of steam at 100 degree celsius must be passed into 5.4 kg of water at 30 degree celsius to raise temperature of water to 80 degree celsius? Homework Equations C(water)=4.2 J/(g C) L(steam)=2268 J/g The Attempt at a Solution Assuming no heat loss...

A fluid mass is rotating at constant angular velocity, w, about the central vertical axis of a cylindrical container. The variation of pressure in the radial direction is given by: dP/dR= (density)*w^2*R Show that the liquid surface is a paraboloidal form; that is a vertical cross section of...

Homework Statement Air is trapped above liquid ethyl alcohol in a rigid container. If the air pressure above the liquid is 1.1 atm, determine the pressure inside a bubble 4.0 m below the surface of the liquid. Homework Equations P= P(nought) + (density)(gravity)(height) density of...

I want to know, given a liquid at a particular temperature and pressure, how fast the atoms in it are moving due to thermal motion. I know that you can do this by calculating the thermal kinetic energy of the atoms, and then figure out the speed from there. I also know that for gases the...

i would like to know how fast and how much liquid nitrogen (-200 degrees Celsius) expands when it is heated with gasses of about 3000 degrees Celsius

It's all in the title. I'm looking for a mathematical relationship.

The universe as a "string-net liquid" Has anyone heard about http://www.newscientist.com/article.ns?id=mg19325954.200&feedId=online-news_rss20 ? A new theory that "give[s] rise to conventional particles and fractionally charged quasi-particles -- [and] to other elementary particles, such as...

hi, why is the presure in liquids not dependant to the shape of its container?

I need a method for estimating the liquid flow rate required by a gas scrubber (I know the amount of gas that needs to be scrubbed and the amount of particulates with it, but I don't know about the nature of the particles, except that they are organic). It doesn't need to be particularly...

Homework Statement A parallel-plate capacitor with cross-sectional area S and plate separation d is put into a stream of conducting liquid with resistivity \rho. The liquid moves parallel to the plates with a constant velocity v, and the whole system is located in a uniform magnetic field of...

I've always wondered how people are able to walk on hot coal without suffering from burns. Moreover, earlier, a teacher demonstrated to my class how if one spills liquid nitrogen on one's hand in open air that one does not suffer from frostbite, but only feels the cold temperature. I got...

How does one measure the index of refraction of a liquid, more specifically the angle of refraction? I'm finding it's relationship to temperature. I can't just dip the protractor into the liquid( as a test medium I used water compared to air) and measure the angle that is in the water(either...

http://www.spikedhumor.com/articles/80802/Crazy_Liquid_Metal_Material_Shows_Extreme_Elasticity_Features.html This is one of the most interest compounds I've ever seen. Its elasticity is hard to believe even when you see it with your own eyes. The link shows a 90 second video clip of the...

i have a few questions: 1)what is the liquid used? 2)is the glass etched inside to hold the liquid or do they use a thin film of two layers, one conducting? 3)lcds use 180hz square waves to keep the display liquid black, but when just using dc the display will turn black and then fade, why?

Homework Statement To deaden pain in minor operations, a liquid that vaporises easily is often sprayed on the affected area. How does this prevent the pain being felt? Would water have the same effect? Homework Equations none The Attempt at a Solution Vaporises easily => absorbs...

Homework Statement When a liquid freezes, it gives out heat. Where does this heat come from? Homework Equations none The Attempt at a Solution Does this only apply to water or other chemical substances as well. The heat comes from the strong bonding when as a liquid. But now...

Say I have a device that looks like a large syringe, filled with some liquid (water). On the "plunger" side I have a flat plate say, that holds the water in the cylinder. On the "nozzle" side, the water is hold in by some cover. I eject the water by striking the flat plate with a weight of...

Hi I asked a question recently about changing state from solid to liquid. The answers were very helpful. Now I have a similar question: How about changing state from liquid to gas in the presence of an electric / magnetic field? Is that possible? Thanks Roger

Mecury has a boiling point of -39 centigrade but is relatively dense with 80 protons. It has 2 valence electrons like all the other transition metals but why does it have the strange property of being a liquid at room temperture?

Hi Does there exist a material whose state it is possible to change from a solid to liquid by application of electric current? Obviously a large enough current will melt anything, but what I mean is is there some other mechanism, other than brute force heating that can cause a solid to...

http://spock.physast.uga.edu/prtspool/bearhug_uga_printout_1163471689_22380_10.pdf A rectangular block is gradually pushed faced-down into a liquid. The block has height d; on the bottom and top the face area is A=5.67 cm^2 . Also shown is a graph that shows the apparent weight W_app of the...

Hi all, I have just done a liquid separation of B-carotene and Chlorophyll-a and put the 2 samples through a UV spectrometer. The result that I get from the meter for B-carotene is 448nm for 1st peak and 475.1nm for 2nd peak. For Chlorophyll-a my peaks are at 417.9nm and 666.1nm. But I...

I have a few questions on some homework I'm trying to do: 1) A 3.5 kg flowerpot drops from a tall building. The initial speed of the pot is zero, and you may neglect air resistance. After the pot has fallen 33 m, it enters a viscous liquid, which brings it to rest over a distance of 1.5...