Water Definition and 1000 Threads

I'm doing an experiment with the electrolysis of water, and I'm hoping to vary the electrolyte concentration (Epsom salt/MgSO4) to see changes in the rate of gas production. I was planning to just do intervals from no salt to maximum solubility, but was wondering whether there might be any...

My son and I are having a problem with part c that suggests our answer for part a and b are wrong.. Part a). If we've understood the teaching notes correctly the force on the gate acting through its centroid perpendicular to the gate and is given by F = ρgAd where ρ is the density of water...

Several apartments have under floor heating (water) with a common boiler room and a central pump. There is no pump in the apartments. Each pipe run on each apartment's manifold has its own flow-indicator. The owner of one apartment is worried that if the neighbor turns off its heating, then more...

I was reaching for some crackers across the table. My arm tipped over a full opened bottled water that splashed about 1/3 of its contents out of it. Of that 1/3, about 50% got on the table and the other 50% splashed across my laptop's keyboard area. I immediately reached for towels to soak...

water flow from a faucet will neck down its radius as it flows to the bottom of the sink. It is asserted that this is due to the fact that gravity increases the velocity of the fluid. This is shown at . I am trying to simulate this, and am not having much luck. shows this for a flat...

PROBLEM: A 120 gallon tank (26" diameter, 60" height) containing 40 Gallons of water is heated up until the tank ruptures from overpressure at 125 PSI (maximum tank rating). How to calculate the initial escaped steam velocity at the ruptured tank, assuming the gash is 2 feet long in the...

How do I calculate a resonate frequency of a length of pipe submerged totally under water? Do I just take speed of sound in water which is 1,481m/s at room temp, and decided it by length of pipe in meters multiplied by 4? so at 20 celsius water and 20cm pipe it would just be: 1481 / (.2 x...

My argument is that heat lost by lump of mass converted to ice will be gained by remaining water. But how do I find heat gained ?

Recently I have been boiling tap water, for about 30 minutes, everyday for drinking water. The reason I do it is because I don't like the taste of chlorimines and chlorine and this is the only way I know to get rid of them without also losing minerals. It works great, and in fact, the water...

I suppose the stream isn't being charged!

In the movie The Abyss an oil rig crew works and lives at the bottom of the ocean in a deep sea structure. There is a compartment where there is an opening in the floor allowing the crew to lower a submersible craft without going through any kind of air locks etc. We all should know from high...

Hi, In a text describing solution to linearized shallow water equations, I am not able to move forward. It's a 1 dimensional shallow water setup. There is a steady state (velocity) and (height of free surface). On top of this steady state there are u' and h' as disturbances. The goal is to...

An amount of water at a temperature of 20 °C is passed through a water boiler in 1.5 min to brought to boiling point. The kettle is broken and does not jump off. The time between the moment when the water reaches boiling point and the moment when all the water is evaporated, is equal to: a) 7,5...

As I understand Darcy's law, it computes the flux of water through an area. The same value of flux can be the realized by different combinations of a density of water in the soil and the velocity of that water. So. as far as I can see, Darcy's law is ambiguous about which combination of...

so according to this https://en.wikipedia.org/wiki/Nucleation nucleation start faster when there is a round matter that already in the phase that the other matter is going to ,so in case of ice melting in water because it would have more Nucleation points, edit: i mafe alittle experience and it...

There is something unusual about water. Without atmosphere, water can't exist. It's as if water is part of atmosphere. In vacuum, liquid water can't exist. What other things like water where it needs other aspects like atmosphere to exist? And what is the analogy of water in particle physics...

I just found this piece in an article: Terahertz waves (THz), which are submillimeter waves sitting between microwave and infrared light on the electromagnetic spectrum, have been used to achieve data rates greater than 100 Gbps. Unfortunately, THz waves share an Achilles’ Heel with the...

I don't normally wash clothes with very hot water but in order to eliminate clothes bugs I need to soak them in very hot water, as advised. I'd like to know what kind of clothes or texture should avoid being soaked in very hot or boiling water? The only texture I can think of is artificial...

I am a little confused why does the temperature was took out of the integration, is there an error in the solution?

A return path for the current was provided by the ocean itself. Given that the resistivity of seawater is about 0.25 ohm-meter, see if you can show that the resistance of the ocean return would have been much smaller than that of the cable. (Assume that the electrodes immersed in the water were...

I thought about using Black principle to solve this question but I am confused about the final temperature of system Q released by vapor = Q absorbed by water mvapor . cvapor . ΔTvapor + mvapor.Lv + mvapor . cwater . ΔT2 = mwater . cwater . ΔTwater But what is the final temperature of the...

Firstly I'm having trouble understanding what water level means. I tried a quick google search and got the following: " water level(Noun) The level of a body of water, especially when measured above a datum line. " That doesn't help me. Is water level the distance from the base to where the...

I take position 1 as the surface of the pool and position 2 as the surface of the container so the value of ##P_1 = P_2 = P_{atm}## and ##v_1=0## and ##h_2=0## ##P_1 + \rho gh_1 + \frac{1}{2} \rho {v_1}^2 = P_2 + \rho gh_2 + \frac{1}{2} \rho {v_2}^2## ##\rho gH = \frac{1}{2} \rho {v_2}^2##...

Hi guys, girls, and non-binaries. I'm a private high school teacher and I'm preparing myself to prepare others for polish physics olimpiad. So I delved into books which have a lot of tricky questions and from time to time I stumble upon one I have trouble with. And that's exactly what happened...

Bailey's death came days after he handled crabs, one which pinched his finger causing a cut. Some vibrio bacteria entered the fresh wound into the blood stream. Since 2007, reports of illness from toxic forms of vibrio have tripled in South Carolina and nearly doubled in North Carolina...

Hello, this is an assigment form the 4th grade high school physics in Croatia, concerning electromagnetic waves. Radio waves of wavelength 12m propagate from the source. The source is on the surface of the water and two waves propagate from it: one through the air and the other through the...

Does the anomalous behavior of liquid water between 0 and 4 Celsius degrees (i. e. expands while cooled) have something to do with the other anomalous behavior of ice (i.e. floats in water)? Are those behaviors correlated ?

hello i have a drip tube with water dripping and when i increase the flow rate or frequency of drips they get bigger/more massive. i see the equation mass x gravity = 3.14(tube diameter)(surface tension) my mass is changing but not gravity, 3.14 or tube diameter so surface tension must be...

https://www.nasa.gov/press-release/nasa-s-sofia-discovers-water-on-sunlit-surface-of-moon/

Hi Please help me with part C. I have answered the question and have attached it for you to see.

Hello all , our PVD chamber experienced a water leakage from the cruible revoler area and unfortunately we are no longer able to achieve a stable Base pressure ( ~10e-6 mbar) We do not have the option of a bake out. Is there any other way to get rid of water in the chamber ? Ofcourse the water...

Okay, so I don ' t have any real specs but i just want to know how big is the difference between water from tap versus the one from fire hose versus the pressure washer?

Hi, Answer given is $E_n=29.4 Joules$ Here is the question. Answer provided by the Chemistry math expert/Professor is as follows but it is different from the answer given. How is that? Compressibility is the fractional change in volume per unit increase in pressure. For each atmosphere...

I notice that water phase diagrams provided online always seem to show a rather linear behaviour for the solid-liquid boundary (and an extremely steep slope). How is this modeled mathematically? Say we use the Clapeyron equation with ΔH and ΔV_m being constant, as online example problems (meant...

1)$$R=\frac{\Delta t(\Delta V)^2}{Q}=\frac{\Delta t(\Delta V)^2}{mc\Delta T}=8.33\,\Omega$$2)$$\Delta t'=\frac{mcR\Delta T'}{(\Delta V)^2}=\frac{\Delta T'}{\Delta T}\Delta t=59.4\text{ min}$$3) I surfed the net a bit and have found a post on physics.stackexchange in which it is mentioned that...

I drew the red and green tangent lines and I found that the angles in blue are equal to theta 1. Also , as the BCD triangle is equilateral, theta 2 = 30. With this I can calculate the side of this equilateral triangle as a function of the radius R of the circumference. After that, I can't go on...

When you dissolve, for example, NaCl in water, then you get "NaCl in water" solution. Will the "NaCl in water " solution have different chemical properties from its constituents(NaCl and H2O)? i.e. is a "NaCl in water" solution a new compound with respect to NaCl or H2O ? And is the ion...

I have been wracking my head about this one... In other jobs I have sized chillers a few times but this one is a bit different. We have a "Bath" of water, about 400 Gallons The baths beginning temperature is 34 F 5000 lbs of product runs through this bath every hour at a temp of 40 F Roughly...

You can use the change in volume to find how much ice turned into water, and then find the energy required to melt that ice - that I have no problems with. But then work done by piston = change in internal energy of ice/water combination (which we found) + heat released to the bath. And we...

... And if it won't form spontaneously with reversed flow, then will a vortex at least sustain itself once we nudge it in one direction?

Hello, my first post here so nice to meet you all :) I have a question. Let's take a small room, about about 16 m^3 (172 feet^3). This room has a very low humidity, especially in the winter. It is around 35%, i would like to raise it to 55% with a custom made swamp cooler. I am trying to figure...

a) Evaporation will remove water from the test tubes as it turns into water vapour, meaning that the solution will have a greater solute concentration and thus an increased osmotic potential which results in a more negative osmotic potential. Consequently this lowers the solution's water...

I want to build a cheap, portable water level recorder so I can record the "seiche" on my lake (and other lakes). I don't want to use fancy components like Arduino boards. And I want it to be portable (and cheap enough that losing it to water, weather or thieves won't be a heartbreak.) There's...

Homework Statement:: The relative density of water is determined by the rate at which it expands (and contracts) with changes in temperature. At approximately what other temperature T does water have the same density as at 1 ∘C ? Relevant Equations:: Just looking at graphical and analyzing...

Imagine water flowing inside this from say left to right. Energy can't be destroyed or created. Pressure can reduce due to the three 90 degree turns. Is the pressure or energy loss due to the heat or deformation or kinetic energy loss of the water to the wall inside? What must be the wall be...

My question concerns what I call R.P.S. (Rotating Planing Surfaces). This version uses freely rotating disks to plane across the surface of the water somewhat similar to wheels on a car going down the road. Specifically what the lift / drag ratio might be and will it be higher than a typical...

Since the outbreak of COVID-19, many people, including some doctors, have been saying that gargling with salt water is effective against SARS-CoV-2. The theory rolled out is that the virus "stays" in the nasopharyngeal tract for some time before going into the lungs, and rinsing the tract with...

Summary:: Consider the rectangular water tank, at the base the length is the same for 200 cm. There are 100 holes for water to come out which each hole have the same flow rate. Find the amount of water that come out in each hole by using differential when we know that there is an error in the...

Consider the rectangular water tank, at the base the length is the same for 200 cm. There are 100 holes for water to come out which each hole have the same flow rate. Find the amount of water that come out in each hole by using differential when we know that there is an error in the measurement...

I wonder if air can remain trapped under a structure that has a deep and a shallow tube. I have already tested with a prototype whether increasing volume in the shallower tube works. Air bubbles came out on the short side, so this doesn't work. Is there any way to realize this concept.