Mercury Definition and 257 Threads

Firstly I figure out that there is a point where the temperature of the gas is the hottest and beyond that no more amount of heat is necessary, descibed as following inequation:

Why Venus is hotter than Mercury In the video linked to above, the author explains why Venus, though it's farther away from the sun, is hotter than Mercury. It squares with what I read thousands of years ago. I hope the explanation is correct. If the video is accurate then I have a question. Is...

When scientists measured the position of Mercury in the 18th century, they interpreted the results assuming a Euclidean background, because they did not know general relativity. So they measured r and φ in fuction of time attributing to these coordinates an Euclidean meaning, that is, assuming...

Venus has a dense atmosphere (about 90 bar). Although Venus has a low axial inclination and the poles of Venus are therefore always in twilight, the day side atmosphere heats to about +460 C and the heat transport at the 90 bar atmosphere is so efficient that the poles are no more than 10 C...

Will the 2025 BepiColumbo mission be able to detect any indications of potential past or current microbial life on Mercury?

I was reading up on a theoretical engine employing the following, “Mercury plasma pressurized at 250k atmospheres, at a temperature of 150 degrees kelvin (-123° C), and swirled within its accelerator to 50k RPM.” Does pressurizing mercury so much somehow allow a plasma to form at such sub-zero...

I have been away from thermodynamics for a while, and there is a young mechanical engineering student who asked my help in solving the question. For the life of me I am unable to solve this problem and I am at my wit's end. I believe I can solve the problem if some pointers are provided. Also...

Hello all, Would anyone be able to help me with a few different questions I have about mercury? I'm looking at the feasibility of purchasing a small amount of elemental mercury and would appreciate if anyone could give me some direction. On the internet, there seems to be a range of widely...

Recently, when reading an entry about Mercury's perihelion shift, someone mentioned a "hand-wavy" explanation as to why GR predicts the orbit so precisely. I was wondering if there was some elementary way to expound on what he was saying. Fundamentally, the comment said something to the effect...

Some notation: - the difference between the heights of mercury, which is effectively the height of the mercury in the open end of the tube is ##h_{diff}## - the volume of gas inside the sealed off end is ##V_{inside}## - the volume of gas when let outside, "normal volume", is ##V_{outside}## -...

$$\rho_{Hg} gh_{actual} = \rho_{Hg} gh_{measured} + \rho_{air} gh_{air}$$ Note: by "actual", I mean "theoretical", i.e. what the barometer would measure were there no air inside it. By "measured" I mean "as measured by the faulty barometer, i.e. with some air introduced". I believe this...

According to Wikipedia, (citation needed) https://en.wikipedia.org/wiki/Ultraviolet What would alter this proportion of emitted radiation to favor more 185nm radiation? Preferably not with a filter that filters out 253.7nm (mathematically would also increase the ratio of radiance of...

I have used the heat equation and am not able to get the initial heat. This is what I have so far: 81060 = 7 * 140 * (change in temp) - (7 * 11300) + 7 * 140 ( change in temp) I found the change in temp to be 81.71K. But that does not help me with the initial temperature!

For the observation of the gravitational redshift one needs an adaptation of the GTR of the object (related to the Sun´s gravity) and the observer (related to the Earth’s gravity). I assume that the situation is similar for the observation of the precession of Mercury, another experiment...

HI, I'm curios about the analytic derivation of Mercury perihelion precession starting from EFE - Einstein Field Equation (or simply just from Schwarzschild solution of the EFE). Can you advise me about some source or online material to learn it ? Thanks.

Having some trouble in answering this question What I have done so far is calculate the initial pressure difference, then used that to find the new pressure difference when pipe's A pressure increases by 34.4 kPa Not too sure of where to carry on from here? All I know is that if pipe A is...

Hi, Why the alcohol thermometer is less precise than the mercury one? If I remember correctly, it is because the thermal expansion coefficient of alcohol is not constant, but I am not sure. Thank you for your time. Regards, ORF

The figure shows two mercury barometers. 1. My first question is why specifically does it have mercury? Is the mercury a gas or a liquid? Why can we not just use water? Does the pressure of the liquid have to be less than that of the atmosphere for this to work? 2. The book says for a given...

Vacuum height of mercury

I came across some articles about the health hazard from broken mercury-based sphygmomanometers. This led me to think about vapor leakage from good devices during normal operation. The top of the glass tube is at ambient atmospheric pressure. There is supposed to be a membrane at the top that...

How come mercury qualify as a metal, since the 6 s electrons are attracted by the nucleus so strongly because of relativistic effects and unlike other metals there is no cloud of electrons?. Because of this mercury is not a good conductor of electricity unlike other metals

For those so inclined: https://Earth'sky.org/tonight/transit-of-mercury-on-november-11-2019

I guess I have to find out something when the tube is on the horizontal. What force should I consider? Is the pressure of the air inside still ##p_{atm}##? When it is on the vertical, the equation is something like this? ##P_{Hg}+p_{atm}*A=p_{atm}*A+ρ_{air}*A*(l_1-l_1')*g## with...

I am wondering about the physical properties of mercury. I know that different materials have different density and ability to penetrate small openings. I wonder if I have a small container of mercury, say about 100 grams or less, and there is a small flat opening at the bottom of such container...

Hi, I am starting to make some experiments with my project and part of it involves developing a small MHD system. Now for test purposes and ease of manufacturing I have decided I want to use some clear see through plastic which would help me see whether my experiment is working as planned. My...

Given: ##y_{2} - y_{1}= 0.2m## ##Q= 1.5\frac{m^{3}}{min}## ##Q= 0.025\frac{m^{3}}{s}## After conversion ##D_{1}= 0.2m## After conversion ##D_{2}= 0.1m## After conversion ##r_{1}= 0.1m## ##r_{2}= 0.05m## ##p_{1} - p_{2} = \frac{1}{2}P(v_{2}^{2}-v_{1}^{2}) + Pg(y_{2}-y_{1})## Calculating...

I think I vaguely understand how it works but not completely. So far, I understand that fluorescent lamps have an electrode at both ends and are filled with an unreactive, low-pressure gas such as mercury. When the current passes through, the electrons are accelerated and they collide with the...

I am curious if it would be possible to put a quartz crystal at the bottom of strong cylinder vial with half the crystal hanging out the bottom (but sealed) and have mercury on top of it and then pressurized if it would create a constant vortex? If the mechanical force of the pressure from the...

Hi. I've recently conducted a Franck-Hertz experiment with mercury. I was able to see bluish glowing regions just as here: However, theory predicts 254 nm, which is far below visible. Are there other energy levels at play here? Wouldn't that mess up the 4.9-V-spaces of the drops in the current...

I was reading about the upcoming transit in May, 2019, and this fact seems quite peculiar. Is there some type of resonance?

I am trying to understand how fluids form particular shapes when put on a solid. In the two figures,what are we taking as a system for the forces? How the resultant of the forces influences the shape of the different fluids?

The question is: The General Relativity Ideas were confirmed by the position of Mercury by Eddington. How could they be certain that the light deviation was due to gravity rather than the lens effect the Sun's corona may have had? What process was used,if any,to remove the effect of the...

It's a question which come into my mind after reading related notes now and again and I can't think of plausible response to it. Given Statements: We have a container filled with mercury and a glass capillary tube placed in it . As tube's diameter become smaller mercury's height in tube will get...

How long would it take for a blob of mercury (the size of a marble or so) to freeze in space? I'd emagine it would have to boil in some way first, and that would send pieces of it flying around, but the surface tension of mercury is much greater than that of water, or urine (as we'd seen...

So it would be cooler and mine-able? Given unlimited tech and wealth in a fictional setting.

Greg Bernhardt submitted a new PF Insights post Either the Sun Is Getting Smaller or Gravity Is Getting Weaker Continue reading the Original PF Insights Post.

Homework Statement Hello, I will post a picture here of a question. It states, a column of air is trapped by 5cm of mercury as shown. What is the pressure in cm of mercury in the gas in each case? Homework Equations Pressure= h*g*rho The Attempt at a Solution I would use that equation but...

Homework Statement What will be the length of mercury column in a barometer tube, when the atmospheric pressure is 75 cm of mercury and the tube is inclined at an angle of 60° with the horizontal direction? Homework Equations Pascal's Law The Attempt at a Solution l ⋅ sinϑ = h l = h / sinϑ l...

I'm working on a thought experiment. I want to know how much of the kinetic energy from a liquid mercury piston will be converted into work done on the hydrogen plasma in the form of compression, and how much work will be done on the piston in the form of compression. Note: assume piston walls...

I have heard people claim that if you stick your hand in mercury, if you do not have any injuries on you, you will not be harmed as long as you have good ventilation. I have also heard people claim that mercury is basically a manifestation of death itself. So how dangerous truly is mercury? By...

I'm likely going to have a ton of questions in the following weeks about a wide range of particle physics etc. If (electricity X mercury vapor) = light, then multiplication being transitive, (light X mercury vapor) = electricity. Can someone inform? I've found only mercury vapor as a metallic...

Why are there no gold companies that produce gold by removing a proton from mercury? Is it because mercury is expensive or lack of facilities to remove the proton. Given a lot of budget (like billions).. what would it take to remove a proton from mercury to produce gold?

Ok, so I've got a practical report due tomorrow and I just wanted to clarify a few things. A bit of background knowledge first. The practical involved taking angular measurements for the emission lines of the Mercury spectrum using the apparatus, a spectrometer and a Mercury spectral tube...

Homework Statement For our investigation, we used a diffraction grating spectrometer to observe the emission spectrum of mercury. We conducted the experiment in a pitch black room to avoid any unwanted light pollution, etc. Whilst conducting the experiment we observed a number of 'faint' lines...

Hi. I'm interested in how physicists in the mid-19th century such as Urbain Le Verrier were able to compute the gravitational influences of the other planets on the apsidal precession of Mercury's orbit, finding that they can only explain about 531" (per century!), not the observed 574". This...

Homework Statement A thin bi-convex lens with refractive index n has spherical surfaces with equal radii of curvature r and measured focal length f. The lens floats horizontally on the surface of liquid mercury so that its lower surface effectively becomes a spherical mirror. A point object on...

If dark matter is responsible for the inner stars within a galaxy rotating at the same rate as the outer stars, then why is it that murcury rotates at a faster rate than say pluto.This posses the question why are we searching for evidence of dark matter deep in the Earth when there seems to be...

Why does mercury in a thermometer expands when we increase the temperature but it doesn't go down after cooling? Why does it just stay there?

Homework Statement A mercury barometer located in a room at 25°C has a height of 750 mm. What is the atmospheric pressure in kPa? Homework Equations Patm = ρ*g*H0 The Attempt at a Solution [/B] My question pertains to the units and how it ends up as kPa in the book. I have no problem with...