Water Definition and 1000 Threads

I'm trying to determine the force needed for one object to displace another object underwater. Specifically, Object A strikes Object B hard enough to jettison it from the seafloor up to sea level/land, let's say the Pacific coastline. I have a timeframe in mind, density & mass of the two...

Hi, If it is assumed the temperature of a shower is to be 43°C and the electric shower consumes 50 litres of water at that temperature, then the Energy required for an electric shower would be: QElectric Shower = mcΔT QElectric Shower = 50 * 4.181 * (43-10) QElectric Shower = 6.89945 kJ or...

Sorry if this is a stupid question but I've searched google and I haven't found an answer. So I've been researching Antarctica and I've found a few details that don't add up. So supposedly if the ice melts on Antarctica then sea levels will rise by 200 feet - Antarctica contains 70% of Earth's...

Hi all. I'm a bit confused. I was lying in bed last night - on one side of a very big bed, not moving. When all of a sudden I heard a big crashing sound of things moving and falling. I switched the light on and on the bedside cabinet on the opposite side to me, a half full bottle of water and a...

Now home water filter is ubiquitous using almost every family. I am wondering who designed such systems (and become its standard form used today) ? I think after second world war the New York water is pretty dirty hence the development of such filter. But I am not sure whether it is correct or not.

Hello all, I'm having problems with my compressed air system. In the factory have some clean rooms with temperature are maintained around 23°C. The outside of clean rooms are normal condition (around 32°C). When i checked some air supply points outside. There were no water in compressed air. But...

Hi all, I'm new to this but joined in the hope someone with more experience could provide some advice. In a personal project, I have a particular design dilemma where I am trying to pass a metal ball bearing (or any other spherical shaped solid) from a column of air into a column of water...

Problem: We wish to find the temperature and the diffusion coefficient of water by measuring the velocity of pollen grains in the medium, due to brownian motion and other forces. Attempt: We have a video clip and are using the program Tracker to measure the position of the pollen grains over...

Homework Statement: Water is flowing out through a small opening. How to calculate the amount of water that has flown out of the nozzle ? Homework Equations: I have tried solving this problem, but I am not able to. none

Summary: water found on potentially habitable exoplanet from the BBC https://www.bbc.com/news/science-environment-49648746

Hello there, maybe I am wrong but I found something inconsistent between the espected tritium concentration in Newly RO Treated Water (6.7 10^4 bq/l --> graph at pag. 16 here) and last measurement published by Tepco on 22th of August at the Water Treatment Facility (1*10^3 bq/cm3) Converting...

Currently there is an operation scenario at one of our plant which directly injecting steam into cooling water line at pump suction in order to generate hot water at 60 deg C for circulation, by doing this its generate vapor at pump suction and lead to cavitation which ultimately damage pump and...

So I'm watching this video on preparation of alcohol using LiAlH4: https://www.khanacademy.org/science/organic-chemistry/alcohols-ethers-epoxides-sulfides/synthesis-alcohols-tutorial/v/preparation-of-alcohols-using-lialh4?modal=1In the final step, there is a primary alkoxide. H2O moves past...

Please excuse my ignorance. I work for a Natural gas company and have an issue that needs addressed. When gas comes out of the ground it goes into a piece of equipment that separates the water from the gas. The gas goes into a pipeline and the water is dumped into a tank. We are currently trying...

I tried to write down the equation of heat exchanged: ##Q_{Cu}=m_{cu}*c_{cu}*(T_f-T_0)## for the pot and ##T_f## is my unknown. ##Q_{H2O}=m_{H2O}*c_{H2O}*(T_e-T_{H2O})## where ##T_e=100 °C## is the temperature of vaporization of the water. But ##Q_{H2O}## is not all the exchanged heat by the...

This is what I did: I know that ##v_1=\sqrt{2gh_1}## and ##v_2=\sqrt{2gh_2}## thanks to Bernoulli's principle. Using equations of parabolic motion I get ##h-h_1-\frac{1}{2}g(\frac{d}{v_1})^2=0## and ##h-h_1-\frac{1}{2}g(\frac{d}{v_2})^2=0##. This means I have two equations in two unknowns...

The first part of the problem I just used Stevin's law: $$p_{atm}=P+ρg(h_1-h_2)=> h_2=(P-p_{atm}+ρgh_1)/(ρg) =>h_2=0.94m$$ Is this right? I considered ##ρ=10^3 {kg/m^3}## About the second part... how can I be sure that ##h_1## remains unchanged? If it is unchanged, then can I use Bernoulli's...

In the USA, the usual solution to keeping water lines from freezing is to bury them. In cold climates this implies digging deep trenches. (On another forum, a person from Minnesota said water lines are typically buried 7 ft deep.) In the days before modern excavating equipment, were...

For a construction I am building, I am stumbling on a rather basic physics question regarding pressure. Let's say I have a cubic bucket of 1m^3 that I place upside down on a water surface. I add a downward force (weight) of say 1000N submerging the bucket under water with the air captured...

Please see attached pictures. Whenever we replace the right cartridge (with carbon filter) with new one (every 6 months). There are initial dark tint water from the carbon that fills a basin. Are the dark water safe? We throw the water of course. But there maybe those who didn't know or have...

When I turn on my water kettle, I hear that familiar "hush" sound as the water heats. What exactly is that? The surface of the water vibrating? Warmer, expanding air leaving the kettle? I know it can't be a function of the water temperature itself because when I turn the kettle off the sound...

Hi, Is there Hydration/solvation shell software? I mean softwares able to show ions/molecules and surrounding water molecules forming hydrations shell? https://en.wikipedia.org/wiki/Solvation_shell

Homework Statement: How or why does inertia caused the water in a bucket not to fall out when spinning in a vertical circle. Homework Equations: Is the bucket catching the water? I know Inertia is the resistance of any physical object to any change in its velocity.

Homework Statement: How or why does inertia cause the water to stay in the bucket while spinning it vertically? I know inertia is the tendency of an object to remain at rest or in a state of uniform motion, but I am not exactly sure how it causes the water to stay in the bucket while it is...

F = mac = (mv2 / r)

Electrons passing through a double slit is in a superposition of passing through the left slit and the right slit, thereby producing an interference pattern on the screen. But when a detector is placed to detect which slit the electrons pass through, the interference pattern is destroyed. How...

So using FBD, I came out with: since it reaches terminal velocity, I can assume F=0, thus mg = upthrust +drag So my density = mg - drag force/g * volume However the answer seems to be wrong from the answer key I was given. Any ideas why? Thanks

I think that it would take less force to pump water based on the lever principle. But I'm not so sure! Here's a drawn photo.

This is a deep well & the dimensions of the bottom chamber is 5x1x5ft which holds 187 gallons. The pump is located in this chamber with a piston/plunger only going up to the top of this chamber at 5ft. The pump pushes 187 gallons into a 6inch diameter pipe which is 1000ft long = 1,470 gallons...

Got an electric water heater in my flat, one of those instant ones. It outputs a low flow but this is alright as you mix the hot water with cold water in the shower. Problem is, in the summer you need to mix in too much cold water in the shower and the heater shuts down, probably as it senses...

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Just had this pondering: Does the force on a water dam depend merely on the height of the water column behind it or does it depend on the total amount of water behind it? For the same dam if I have a lake behind it that is just a few metres wide vs. having a vastly large lake behind it with the...

There's no thermodynamics forum, so I'll post this here. Things "freezing" in space has always bothered me ever since Tim Robbins removed his helmet while in orbit around Mars...

Based on my understanding, Top Tank Refilling Advantage: Atmospheric Pressure Disadvantage: High Head (Requires more distance, thus more Work since W = f x d) Bottom Tank Refilling Advantage: Low Head Disadvantage: High Static Pressure (Requires more Force, thus more Work since W = f x d)...

Good day, I am here because I have begun a new hobby and it is my hope to better understand what it is I am doing and seeing. Luckily I have the mental capacity to process much of what I read, but sadly I am vastly under-educated. My new project involves electrolysis and for reasons I don't...

Summary: Hi, I'm doing an assessment for Physics on Optics topics, but I can't really explain how the CV affect the RV CV : Focal length of convex lens RV : Temperature of water after 20 minutes under the sun How I should explain for the temperature difference? 🤔 Please help, Thanks.

(As a quick note, 'wave flume' should be taken rather generally. I basically just mean the sort of experiments involved in the flow of water which may use instruments such as pressure gauges, load cells, wave gauges, and ADVs. I know that they're not always done in a flume per say -- the...

Hi everyone! I am working with the theoretical solid phase diagram of water and I would like to know what negative pressure means. Thank you in advance!

Why does 32 F ice have more energy that 32 F water?

Split off from here: https://www.physicsforums.com/threads/what-is-responsible-for-the-spinning-of-a-galaxy.974218/#post-6201131Has the idea of Coriolis force affecting the direction of swirl down a drain been compellingly vindicated or debunked? I don't mean in theory. We all know the theory...

In theory or at least in my head, it seems simple enough to me. A simple water pump, such as a pool pump pushes water through a pipe into a water turbine and recycles the water directly back to the pump. With some of the hydrogenerators I've seen out there, they produce far more power than the...

What I know for Number 1. t=2.7s d=? Vi=0m/s^-1 a=9.8m/s^-2 Vf=? Equation to use? Vf=Vi+at= 0+9.8m/s^-2x2.3= 26.46m/s So for number one the final velocity is 26.46m/s d = 0.5 * g * t2 = 0.5x9.8x2.7^2=35.721 Number 2 I know t=2.3s d=35.721 vi? Vf? a=9.8? what formula do...

Could anyone kindly kind me as to where this formula is derived from and how, because I searched and can't find it anywhere

Problem Statement: 1 kg of water at 273 K is brought into contact with a heat reservoir at 373 K. When the water has reached 373 K, what is the entropy change of the water, of the heat reservoir, and of the universe? Relevant Equations: dS=Cp*(dT/T)-nR*(dP/P) dS=Cv*(dT/T)+nR*(dV/V) I am...

Area = 1 x 0.5= 0.5 1st moment of area = 0.5 x (0.5/2) = 0.125 m total force = p x g x 1 moment = 1000 x 9.81 x 0.125 = 1226.25N Force = 1226.25 im pretty sure all that is right i think the second moment = Ix = bh^3 / 3 = 1 x 0.5^3 / 3 = 0.0416 then 2nd moment of area / 1st moment of area...

This probably occurs with salt too but let's concentrate on xylitol: you heat water till it boils, put the hot water in a cup and add a tsp of xylitol. It boils again violently for a couple of seconds. The high school explanation is that the boiling point of the water is lowered. I'd like to...

During hurricane Lenny in 1999, I was anchored on my sailboat in a protected cove in the Virgin Islands. The winds were about 60 mph with gusts to an estimated 80 mph where we were. I observed that during the gusts, the salt water would "boil", that is, totally evaporate the surface into a cloud...

Bought a stainless steel whole house water filter for a very good price ($100), turns out too good. On inspection I suspected it would leak so rather then installing it into the house water system I pressure tested it. There was a small leak that stopped after a minute or so. Relieve the...