Mercury Definition and 257 Threads

1. Rank the following from most to least for the percentage of its volume above the water line: a. Basketing floating in freshwater b. Basketball floating in saltwater c. Basketball floating in mercury 2. N/A 3. I believe A=B=C, correct? It only asks for "percentage of...

The problem is to calculate the precession of Mercury using a naive approach: {{d(\gamma m \vec v)} \over {dt}} = {-GmM \over {r^2}} So apparently a Lagrangian of the form - mc^2 \sqrt {c^2 - \dot r^2 - r^2 \dot \theta ^2 } - {{Gmm} \over r} gives us a Lagrangian that obeys the previous...

I'm a mechanical (mecha-nickel) engineer and not an electrical engineer, so please don't kill me for asking: In a fluorescent light the high voltage potential between each end of the light strips the electrons from the mercury gas which ultimamately generates UV light, etc., etc. My...

how many metals can amalgam on mercury ?

Hello! This is my first time visiting this forum and I am sure it won't be my last. I have a project in which I need to replace some mercury relays because they won't fly international. To give some more info the project is designed to have three amplifiers hooked up to a switch box and...

I have few questions regarding mercury vapor, except those related to health hazards. What is the mean molecular speed of mercury vapor at room temperature and speed of sound in a pure mercury vapor also at room temperature? Also, for the same density of air at seal level, can mercury...

I was reading about the sprengel pump , And it uses falling mercury to trap air to evacuate a chamber to get the air out of it , http://en.wikipedia.org/wiki/Sprengel_pump you can look at the diagram of the pump , my question is when the mercury traps the air and pushes it down , why...

why does mercury move with such velocity while pluto is much slower?

Homework Statement What is the fractional change in the density of mercury when temperature changes for 30oC to -10oC. The density of mercury at 30oC is 13600 kgm-3. Homework Equations dt=do(1-gamma t) The Attempt at a Solution gamma=180x10^-6 t=30 dt=13600...

Homework Statement The U-shaped tube in the figure has a total length of 1.0 m. It is open at one end, closed at the other, and is initially filled with air at 20C and 1.0 atm pressure. Mercury is poured slowly into the open end without letting any air escape, thus compressing the air. This is...

Hi, Please explain the states/charges of mercury for me. Is this right: There is Hg which is 2+ charge and there is Hg₂ which is also 2+ charged. One would never find the monatomic Hg alone is nature only as diatomic Hg₂ but Hg could be found as a single atom in a...

Homework Statement A u shaped tube has a total length of 1 m, it is initially filled with air at 293K and 1 atm, mercury is poured in without letting air escape, compressing the air. This continues until the mercury is filled to a level L, how long is L The tube is open at one end, closed...

Hello everyone, This question is the third question from the 2001 IPhO: Problem text: http://www.jyu.fi/tdk/kastdk/olympiads/2001/IPhO2001-THEO.pdf Solution text: http://www.jyu.fi/tdk/kastdk/olympiads/2001/IPhO2001-THEO-SLN.pdf I'm having trouble understanding how they came to the conclusion...

Homework Statement A mercury manometer is attached to a gas cell (this is the closed end). The mercury height is 120mm when the cell is placed in an ice-water mixture. The mercury height drops to 30mm when the device is carried into an industrial freezer. What is the temperature of the...

Homework Statement A simple open U-tube contains mercury. When 11.8 cm of water is poured into the right arm of the tube, how high above its initial level does the mercury rise in the left arm? Hint: At the level of the interface between the water and the mercury, the pressure on the left...

Homework Statement A laboratory centrifuge on Earth makes n rpm (rev/min) and produces an acceleration of 3.70 g at its outer end. a.) What is the acceleration g's at a point halfway out to the end? Homework Equations a = (V^2)/R The Attempt at a Solution I really don't know...

One of the outputs of mercury porosimetry is Differential intrusion in ml/g/um. this is ml of Hg per g of sample per um of what? What is that micrometer? The characteristic length of the sample, the average pore diameter or radius?. Also, why is there a "log differential intrusion", for...

Hello! Mercury vapour detection is normally performed at 253.6 nm, which is the lowest emission line in the UVC range. I have to figure out if a similar atomic absorption approach would be valid at a longer wavelength, specifically at 365 nm, which is an other emission line but into the UVA...

This probably belongs in one of the physics or engineering forums, but I don't know which one... so I post here with a request that it be moved if appropriate. Back in the early 70's, I desired to build a diorama of the Enterprise and a D7 Klingon cruiser. It would, of course, have to be fully...

Homework Statement A manometer using oil (density 0.91 g/cm3) as a fluid is connected to an air tank. Suddenly the pressure in the tank increases by 0.72 cm of Hg. (a) By how much does the fluid level rise in the side of the manometer that is open to the atmosphere? (b) What would your...

Homework Statement Estimate the mean free path of an electron in mercury vapour at a temperature of 160 degrees C, where the vapour pressure is 11.28 mmHg It gives the standard atmospheric pressure as 761.84 mmHg. Homework Equations Mean free path= (Boltzmann's constant times...

U-shaped tube-- how far does the mercury rise when water is poured into one side? Homework Statement A U-shaped tube containing mercury is open to the air on both ends. Water is poured into one arm until the water column is 15.0 cm deep. How far upward from the initial position does the...

Hello all, This evening, I broke a hole near the tip of a spiral CFL similar to this one while screwing on a glass cover over a ceiling light fixture in what will become a new baby's room...

Take a look at this.. http://sunearth.gsfc.nasa.gov/sunearthday/media_viewer/flash.html Navigate > Visualizations > Mercury Transit of the Sun Why is Mercury traveling up and down vertically? I can understand on most given view points it would not be a straight line, but the line of...

Homework Statement The enthalpy of fusion of mercury is 2.292 kJ/mol, and its normal freezing point is 234.3 K with a change in molar volume of +0.517 cm/mol on melting. At what temperature will the bottom of a column of mercury (density 13.6 g /cm3) of height 10.0 m be expected to freeze...

Hello I have used the Mercury intrusion porosimetry equipment to determine pore diameter range of porous ceramic material. But it only determined the micro and meso porosity. I also read that this tecnique is not adequate to determine macroporosity. Do you know Why? This equipment also...

Hello I have used the Mercury intrusion porosimetry equipment to determine pore diameter range of porous ceramic material. But it only determined the micro and meso porosity. I also read that this tecnique is not adequate to determine macroporosity. Do you know Why? This equipment also...

Homework Statement How many kg of mercury to fill a 250ml container? Homework Equations The Attempt at a Solution

Could there be objects between Mercury and the Sun? Like, say, asteroids?

Mercury is very close to the sun and I think it has been tidal locked, but for its eccentric orbit it can not be faced one half to the sun. Am I right? If it is not locked, what is the scenario that Mercury will have in the future?

So what is the difference between thimerosal and straight mercury? Is it more or less harmful?

Was mercury used as a preservative in vaccines, and if so, in what doses, and is there any evidence that this caused increased numbers of neurological/psychiatric disorders?

Homework Statement A 17.85 cm diameter, 32.4 cm tall steel cylinder (ρsteel=7900 kg/m3) floats in mercury. The axis of the cylinder is perpendicular to the surface. What length of steel is above the surface? Homework Equations vsub/vobj=(ro)obj/(ro)liquid The Attempt at a SolutionA...

Homework Statement A 17.89 cm diameter, 42.43 cm tall steel cylinder (rsteel=7900 kg/m3) floats in mercury. The axis of the cylinder is perpendicular to the surface. What length of steel is above the surface? Homework Equations Pb=Pa+density*g*h The Attempt at a Solution...

I'm interested in reading Feynman's calculation for the perihelion advance of mercury that used quantum field theory calculations of graviton interactions. Anyone know where it's published or a good source on the web? Of course I've googled physics forums and haven't found an answer.

hi guys, need some help for this question. a capillary of unknown internal radius was inserted into a pool of mercury into a pool of mercury. the height of mercury within the capillary was depressed 1.6cm below the free liquid. Calculate the internal diameter of the capillary. For the...

Imagine a hollow cylinder filled with water (a water tank) a hole is near the bottom of the cylinder the hole is covered, the tank filled with water and then the hole is uncovered the volume flow rate = Q h = the height of the hole from the water level Q = Pi*r^2 * (squareroot 2gh)...

1. List the steps needed if a scientist is to use gravimetric analysis to find the percentage of mercury in a sample of mercury oxide. 2. Dont really know how to do it but i know you must use fractional distillation, right? and then everything is a mystery. Help will be greatly appreciated.

Newton's Law of Cooling Time Required to Cool (or heat) an Object [Also known as Newton's Law of Cooling] t=mCp(Ts-Tf)/Q Where; Q is the heat added (or being removed) from the object in watts m is the mass (weight) of the object in Kg Cp is the Specific heat of the object...

I have found this fantastic calculator: http://www.ajdesigner.com/phpthermalexpansion/thermal_expansion_equation_volumetric_volume_change.php I need to use it to work out how much Mercury I need to expand it by 50 Litres under temperature. First things first though, i’m getting...

What is the synodic period of Mercury? What is the average synodic period of Mercury? I have combed the internet. Some sources use a number around 115.877484 days and they seem sure of themselves. I don't own astronomy references. Help please

Mercury is poured into a U-tube. The left arm of the tube has cross-sectional area A1 of 10.0 cm2, and the right arm has a cross-sectional area A2 of 5.00 cm2. One hundred grams of water are then poured into the right arm.(a) Determine the length of the water column in the right arm of the...

How did fish end up having mercury on them?. Is it natural to them?. Does the meat side of the fish also contain mercury or just the skin side?.

Homework Statement The pressure on 0.01 litres of mercury is increased reversibly and isothermally from zero to 1000 atm at room temperature (293 K). Mercury has a coefficient of volume expansion β = 1.82 × 10−4 K−1 , and an isothermal compressibility κT = 4.02 × 10−11 Pa−1 . Note: 1...

How to measure the amount of mercury in the blood of people who have filled their teeth?I mean how to make a sample of their blood which would allow us to determine the radioactivity and dose of the mercury!Has such a thing been done?

Homework Statement The u-tube shown has a cross-section of 1 cm^2. It contains mercury to the shown levels. The pressure above the the mercury is 750 torr. The left side is sealed off. The right side is is pumped such that the pressure is approximately zero. i) Determine the far the mercury...

Homework Statement Mercury is poured into a U-tube as in Figure P15.18a. [see the picture here: http://www.ux1.eiu.edu/~cfadd/1350/Hmwk/Ch15/Images/P15.18.gif] The left arm of the tube has a cross-sectional area of A1 = 10.0 cm2, and the right arm has a cross-sectional area of A2 = 5.00...

I was working on a problem that stated an airplane is flying at an altitude of 10km. In its nonpressureized cargo bay is a container of mercury 325 mm deep.(the container is vented to the local atmosphere) The first part just asked for the atmospheric pressure at 10km. Which I found in a...

Homework Statement a. Does the photoelectric effect take place if mercury is illuminated with UV light with a wavelength λ = 300 nm? The cutoff wavelength for mercury is 250 nm. Homework Equations ft= WF/h(planks constant) E=h(f) The Attempt at a Solution im not sure how to...

Homework Statement A proton is fired from far away towards the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 14.0 fm. If the proton is fired at a speed of 32100000 m/s, what is its closest approach to the surface of the nucleus (in fm)? Assume that...