Depth Definition and 340 Threads

For a good conductor, an incoming plane electromagnetic wave will be attenuated exponentially as it penetrates a distance ##z## into the conductor, ##|\vec{E}(z)| = |\vec{E_0}|e^{-z/ \delta}##. ##\delta## is called the "skin depth". The current generated by this incoming electromagnetic wave is...

For particle in a box with the finite depth, is it traveling wave? or standing wave? I am confused with its ability to pass through the potential walls that is classically forbidden area which makes me think it is traveling wave. But for particle in a box with infinite potential, I understand...

I have Bathymetry data which gives the depth-area-volume relationship of a lake. I have determined the area-volume relationship using the function Area=A*Vol^B. Now I'm not sure how to determine the similar relationship between depth and volume. Can I use the same function i.e. Depth=A*Vol^B? I...

Homework Statement Hello, the plot in the image shows a modulated signal s(t), with one period of the modulating signal m(t). The mean value of m(t) is equal to zero . Its asked me to find the modulated index, the amplitude of the carrier, the equation of the message(m(t)) and the kind of...

Hello, I need to figure out the max water depth a motor will operate without water ingress. The plan is to use a vacuum pump to create differential pressure and correlate that to water depth. My issue is the correlation between the vacuum and pressure. Can someone please provide a formula for...

Homework Statement [/B] A student uses an audio oscillator of adjustable frequency to measure the depth of a dried up well. Two successive resonances are heard at 17.0Hz and 23.8Hz. The speed of sound in air is 343 m/s. How deep is the well?Homework Equations f=nv/4L The Attempt at a Solution...

The Theoretical Minimum: Quantum Mechanics - https://www.amazon.com/dp/0465062903/?tag=pfamazon01-20 Sakurai Modern Quantum Mechanics - http://www.amazon.com/dp/0201539292/?tag=pfamazon01-20 I want to know, which book covers more in depth? And Sakurai's book is more advanced than Leonard...

For a photopolymer, the heuristic goes that longer wavelengths of UV light penetrate deeper than shorter wavelengths of UV light. For example, the UVA spectrum penetrates more deeply into the photopolymer than the UVC spectrum. What is the best way for this to be explained?

Homework Statement The odd bound state solution to the potential well problem bears many similarities to the zero angular momentum solution to the 3D spherical potential well. Assume the range of the potential is 2.3 × 10^−13 cm, the binding energy is -2.9 MeV, and the mass of the particle is...

Hello. The skin depth is nothing but measure of penetration depth of EM Wave when it is incident on the conductor. It is well known that the skin depth is decreased when the EM wave frequency increases. But thinking about DC field. We know that when DC is applied to metal (metal is installed...

Homework Statement This is how my teacher dictated the question... ---A layer of oil 3 cm thick is floating on a layer of coloured water 5 cm thick, the RI of the coloured water with respect to the oil is ##\frac{5}{3}##. The apparent depth of the liquid is ##\frac{36}{7} cm##. What is the RI...

So I am trying to find the depth of immersion of this particular boat model, which has curvilinear edges (subparabolic edges) on each side. The figure of the pontoon is shown below So now when I place this pontoon in water, the height of the water that rises, called the depth of immersion is...

Hi, I want to calculate the penetration depth of some different frequency ultrasound transducers. I know that it depends on the attenuation of the medium but not sure where these types of figures will be hiding. I assume that once the dB lost for the depth is equal to the dB generated, this is...

Homework Statement Hey, so there is a light bulb above a tank of water which has a mirror at the bottom. I am trying to find the apparent depth of the image of the light produced by the mirror. Finding the apparent depth of the mirror is easy, but I am confused on what to consider the object...

generally, how abstract can engineering programs get? i thoroughly enjoy physics and calculus, but, I'm also taking an introductory discrete mathematics course and i find it excruciatingly dull to the point where i can hardly even concentrate on it. what does this mean? if i go further into...

Homework Statement Problem - If the volume of the carry-on luggage is 2000 cubic inches, determine two possibilities for its depth. Where necessary, round to the nearest tenth of an inch Homework Equations V(x) = x(x+10)(30-2x) Volume function is given above The Attempt at a Solution I...

Homework Statement Hi. I need help with homework. the correct answers have been provided in the question. one doesn't match with mine and the other does. I don't understand how the one answer can be correct when its dependent on my incorrect answer. A transparent cube of 15cm edge contains a...

Homework Statement Determine at what depth below the surface the temperature never falls below zero. Homework Equations \theta(x)=\bar{\theta}+\theta_0\cos\left(\omega t-\sqrt{\dfrac{\omega}{2D}}x\right)\exp\left(-\sqrt{\dfrac{\omega}{2D}}x\right) where the average is \bar{\theta}=2.5 and...

Seems like an easy question yet I can't find an answer. Obviously the surface layer of the ocean gets more sunlight but I don't think that is the reason deep water is colder. The increase in pressure usually increases the temperature but this seems to be the exception. Thanks for taking the time...

Can anyone point me in the direction of any published scientific work involving the study of Earth to Mars flight trajectories? I am thinking of researching this topic for a project and I would like to know about the work that has already been done.

Hello... how to write the function of depth first search? Thank you.

Hi! (Wave) How can we find the depth of a perfect binary tree and how of a complete one? (Thinking) Since a perfect binary tree is a full binary tree, at which the leaves have the same depth, I thought that we can find the depth, by just looking at the leftmost nodes, like that...

Hello! (Wave) I want to write an algorithm, that implements an ordered tree(not necessary binary tree). It should check if all the leaves of the ordered tree (that is implemented from the binary tree) are at the same depth. Could you give me some hints how I could do this? (Thinking)

Homework Statement To measure the depth of a lake, an empty bottle (V=1dm^3) is lowered to the bottom of the freshwater lake. There is a weight attached to the bottom of the bottle to keep it upright. When the bottle is recovered it is filled with 0,58dm^3 of water. Determine the depth of the...

Homework Statement h(t) = 3 + 2sin(0.5236t) h = depth in meters (water) t = number of hours after 7 1) A certain ship can only enter the harbor if the depth is 4.5m or more. For how long can this ship stay at the harbor? Homework EquationsThe Attempt at a Solution I tried getting both of the...

Hello, I drew up this graph to try and understand the concept of depth-first search. Starting at node C, I was wondering if its correct for the order to be C-A-B-D or C-B-A-D? It seems like you can traverse in either direction without a problem.

Hi, I'm currently stuck on how to construct a breadth first and depth first spanning tree for this graph, the algorithm that I'm following is somewhat ambiguous. I'd really appreciate if someone can provide an explanation on how I should go by doing this. Thanks

Determination of density at a depth in a compressible liquid. Hi all, Let us consider a tank containing some compressible liquid with bulk modulus K and having density at its surface s. Consider some part of liquid with volume V, a depth h below the surface. Due to liquid above it there...

Hi, Could anyone explain how the affect that P-N junction depth has on the performance of a semiconductor device? Are there any devices which would benefit from having a much larger junction depth?

Homework Statement 4. The bottom half of a tank is filled with water (ρ = 1.0 x 103 kg/m3), and the top half is filled with oil (ρ = 0.85 x 103 kg/m3). Suppose that a rectangular block of wood of mass 5.5 kg, 30 cm long, 20 cm wide and 10 cm high is placed in this tank. How deep will the...

As we know due to skin depth effect the Alternating Current flows at a depth from the conductor surface (which means there is no voltage on the surface of the conductor, it is only at a depth from the surface). Then how is it possible for voltage to get appeared across some other conductor...

Homework Statement I have a lot of information about 2 different superconductor materials; indium and lead. The indium is pretty much 100% indium with no impurities, and the lead is unknown purity. I have the temperatures and magnetic fields at which they are superconducting and the...

I'm studying CE and math. My computer engineering course is basically electronic/electrical engineering with extra software. I have a choice between the two subject combinations below. Additionally, 1. I'm studying two mechatronic control theory subject, and a mathematical control theory...

Homework Statement A man drops a rock into a well. He hears the sound of the splash 3.2 seconds after he releases the rock from rest. The speed of sound in air (at the local ambient condition) is 338 m/s (a) How far below the top of the well is the surface of the water? (round your...

Homework Statement A flint glass plate 3.5 cm thick is placed over a newspaper. How far beneath the top surface of the plate would the print appear to be if you were looking almost vertically downward through the plate? Homework Equations N=1.66 for flint glass Apparent = d/n The...

Homework Statement A diver weighing 784 N stands on a diving board 13.6 m above the surface of a pool. The diver steps off the edge and falls into the pool. The pool does -12290 J of work on the diver. How far below the surface of the pool (depth) does the diver reach? Homework Equations...

Hi, I am building an underwater quadcopter and I need a depth/altitude sensor for the platform to automatically keep the same altitude above the seabed. I have done some research and I could not find anywhere an off the shelf depth sensor so I figured that I will make one myself, so I...

Homework Statement If you drop a stone into a deep well and hear a splash 4.68s after dropping the stone, how far down is the water level? Neglect air resistance and assume that the speed of the sound in air is 3.40x10^2 m/s Homework Equations v=d/t d=v1t+1/2at^2 The Attempt at a Solution Here...

Hello, I would just like some clarification on this... When you calculate "total" pressure at a depth in a fluid do you have to add on the value for atmospheric pressure?? Thanks, Molly :-)

A conical tank (with the vertex down) is $10 \text{ ft}$ across the top and $12 \text{ ft}$ deep. If water is flowing into the tank at rate of $\displaystyle\frac{10 \text{ ft}^3}{\text{min}}$ Find the rate of change of the depth of the water when the water is $8 \text{ ft}$ deep...

Hello everyone, This isn't really my area of expertise, so I am looking for a bit of guidance. I wish to estimate the temperature underground at a depth of 5ft. The climate is Saskatchewan (Canada) so it is covered with snow in the winter, and fairly hot in the summer. There is no tree...

Homework Statement A cylindrical tank of radius 4cm is partly filled with water.A solid metal sphere of radius 3cm is lowered into the water by means of a thin wire until it is totally immersed. Find the increase in (i) the depth (ii) the pressure at a point on the base (iii) the thrust on...

Hi all The reflection and transmission of a pressure wave at a boundary depends on the relative impedance of the two media. I'm pretty new to acoustics but the textbook I've been looking at doesn't seem to specify that the such calculations are only valid when the medium is at least a few...

Why does the speed of the water wave decreases when the water wave approaches the shallower region? Is it because of the frictional force between the water molecules and the seabed? I have searched the net but i didn't get any clear answer to this questions. Please explain in details of the...

Here is the question: I have posted a link there to this topic so the OP can see my work.

The time dilation effect on a lightclock moving horizontically is very easy to understand. But how does the speed affect our biological processes? "Because time slows down!" you might say. But specifically, what does make say the cells move slower? If they are moving in the same direction of a...

Hi, It may not be the best title chosen but here is the question. If I have one container that has two compartments, one has a battery pack built from several alkaline cells and the second compartment has some pcb, wiring etc. The two compartments are separated each other with a plug, no...

Homework Statement A rectangular channel has a width of 2 meters, and an slope of 1:80. The Manning's number for the entire channel is n = 0,014. In this situation the depth is y= 1,50m. The flow of water is normal. Further down the slope decreases to 1:150 and the width increases to b=3...

Any help is appreciated, I'm really just trying to figure out if it can withstand 300 meters but it would be useful to see how/if a max depth can be calculated. diameter: 20M steel density: 7850 kg/m^3 weight: 250,000 kg shell thickness: 2.54 cm density of water: 1027 kg/m^3 How much...

Homework Statement An inverted right circular cone of vertical angle 120 is collecting water from a tap at a steady rate of 18∏ cm^3/min. Find a) the depth of water after 12min, b) rate of increase of depth at this instant Homework Equations The Attempt at a Solution All...