water surface Definition and 23 Threads

Looking out the window on recent flights I have given some thought to the implications of the fact the bodies of water we see are never actually flat, anywhere, at any size. The earth beneath the bodies of water on its surface takes on the shape of a sphere of course, and one could say that...

Hi togehter, this may be an easy one for most, but I'm really struggling with imagining the process. Suppose we have a compressed air vessel that is half filled with water. The pressure in the vessel drops from 10 bar to atmospheric pressure within a few seconds. How does the water surface...

For my project, I need water waves of all frequencies to move at the same speed. I read this article, but struggled to grasp some concepts. The key idea of the article is that a raindrop hitting a water surface basically creates a pulse containing all the frequencies, and since the water is very...

When small object such as needle is put on the surface of water it displaces small amount of water which creates a depression under the object. Such depression increases surface area of the water because of which surface tension tends to decrease it. Explanation why surface tension balances the...

I would like to simulate a simplified version of this phenomenon: where I will assume that the viscosity is zero and the liquid can therefore swirl around "laminarly" forever according to some velocity profile that I specify. How can I calculate the shape of the surface, at least in this...

Homework Statement Homework Equations n1/n2 = (sinθ2)/(sinθ1) = v2/v1 The Attempt at a Solution Moving from a lower refractive index to a higher refractive index. ( Lower density to higher density means faster speed to slower speed) The answer is answer B, I don't understand why.

Homework Statement A student looks at the sunlight reflected off a puddle of water. She puts a polarising (Polaroid) filter in front of her eye. As she rotates the filter the puddle appears darker then lighter. Explain this observation Homework EquationsThe Attempt at a Solution Here's my...

Hello guys, Consider a partially filled tank with water where the acoustic field can be described by the Helmholtz equation. The boundary condition at the water surface would be \frac{∂p}{∂\vec{n}} = -j\rho_0\omega\frac{p}{Z} where Z is the impedance of the water surface. What would be...

Homework Statement So the full problem is the following: "On the top of a truck, there is a cubic container with a side-lenght of 1,00 m and it's filled with 500 liters of water. The truck accelerates with 2.0 m/s2 in the x-direction during the whole experiment. When the watersurface has...

When we look in the aquerium , the fish moves from here to there but there is no disturbance at the surface of water . Why is it so? My attempt Actually I think that this problem is due to permiability of water. Am I right or wrong?

Homework Statement An underwater scuba diver sees the Sun at an apparent angle of 44.5° above the horizontal. What is the actual elevation angle of the Sun above the horizontal? (Use 1.333 for the index of refraction of water.) Homework Equations n1sin(Θ1) = n2sin(Θ2) The Attempt at...

Fill a bath tub with six inches of water is the water completely flat or level on top? John

Homework Statement Lauric acid , CH3(CH2)10CO2H has been dispersed 500cm2+ on the water surface. Assume that the cross-sectional area of acid molecule to be 18.2A2+ and the density of the initial acid is 0.78gcm3-, calculate the amount of acid that dispersed on the surface of water. * the...

So I've studied physics at the university quite a bit and was a bit surprised when I couldn't answer this simple question a friend asked me. When something lands in water why are several ripples created? Like why is the resulting water wave made up of several peaks and valleys and not just one...

Hey guys, I'm working on a project which demonstrates the venturi effect, by flowing gas through a nozzle (which is housed in a 2 piece housing) and it flows out the exit, the air is picking up water along the way. We have noticed that water droplets are forming in the corners of the...

Homework Statement Calculate depth below the water surface of the centre of pressure of the water pressure acting on the submerged triangular lamina. The triangle is 2m below the surface and is shaped like this: Hypotenuse is sqrt(13) Other sides are 2 and 3, where the side with length 2 is...

Homework Statement I've just done a experiment about the curved water surface when spinning. I want to ask (1) what theory involve in it? also, I use some software to mersure the curved water surface and i get the equation of the curve, I get the rotation speed (w) The coeff. of...

Hi! I got a question concerning a solution to calculate the evolution of surface heights of oceans. Since I'm only interested in the surface itself I omit the volume underneath and the air above the surface. I grabbed a linearized and simplified version of the Bernouli-Equation which I looked...

There is an air bubble at a certain depth and it's rising to the surface of the water. The temperature of the water is constant at a certain temperature. The gas inside the bubble expands as it rises to the surface, but does the temperature of the air stay the same? Is this an isothermal or...

Lets suppose we have a planet made from two half-sphere with the same radius (R) made from matter with different density. The left-half-sphere is made from rocks (5gr/cm3) and the right-half-sphere is made from iron (8gr/cm3). Then we pour water on up to about one-tenth of the sphere...

hi guys.. i don't know much about physics. and if my questions sound stupid .. please excuse me. According to what I've known, the water surface is flat, and we use it for some sort of measurement like a water level, but if we go to outer space, we would see the water surface not flat , it's...

Hello all, Its my first thread here! I'll start things off with a (simple?) question. Suppose a block is suspended on a surface of water. It comprises potential energy quite obviously. As the block desends down the water level, it loses PE. According to the rules of conservation of energy...

Dear Sirs, i need your help in this question, truthly i can't solve it. so kindly asking you to send me an answer with proper explanation if possible. the question is: an air bubble has a volume of 2.5 cm3 when released at a depth of 40m in water. What will its volume be when it reches...