Depth Definition and 363 Threads

Homework Statement You are a secret agent deep in the jungle, escaping from the pursuing villains. You see a stream and reeds, so you cut off a reed, jump into the stream and lie about half a metre under water breathing through the reed. Assuming that the area of your chest is approx...

As someone trained in IT, having spent 15+ years as a network consultant, it sometimes surprises me that people expect you to be an expert in other areas of IT. I know networks and subnets, protocols, infrastructure, network security, data packets, switching, wireless and related things - that...

A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, with the open end of the tube under the surface of the basting sauce, the sauce rises in the tube to a distance h, as the drawing shows. Using 1.013 × 1055Pa for the atmospheric pressure...

Homework Statement A square pool with 100-m-long sides is created in a concrete parking lot. The walls are concrete 90 cm thick and have a density of 2.5 g/cm3. The coefficient of static friction between the walls and the parking lot is 0.49. What is the maximum possible depth of the pool...

Homework Statement Why is the depth of field greater, and the image sharper, when a camera lens is "stopped down" to a larger f-number? Ignore diffraction. Homework Equations f-number=f/D where D is the diameter of the hole. The Attempt at a Solution At a larger f-number, the...

Tapered cantilever beam with varying depth structural mechanics question help pleas?? [b]1. A tapered cantilevered beam of length 1000mm is fixed at the left end and carries both an upward load 400N and a positive moment (M) at the free right end. The out of plane thickness of the beam is...

Homework Statement The time it takes a high frequency sound to travel from the surface of the lake to the bottom of the lake and back to the surface is 0.1seconds. What is the depth of the lake? Homework Equations Speed of sound in water= 1500m/s Time=0.1s Depth=? The Attempt at a...

Homework Statement Find the condition on the depth of the finite square well such that one finds two even and one odd bound state energy eigenstates, but no other bound state solutions exist. Your answer should appear as a range of allowed well depths, say ? < Vdepth of well < ? Homework...

what is the depth of field of a microscope and how is it different from the depth of focus of the microscope.

Homework Statement A typical diver inhales 0.500 liters of air per breath and carries a 20. L breathing tank containing air at a pressure of 300. bar. As she dives deeper, the pressure increases by 1 bar for every 10.08 m. How many breaths can the diver take from this tank at a depth of 25...

When i hit a pile with a hammer and a certain kinetic energy is transferred to the pile. How can i calculate how deep it will go in relation to the force applied? It seems to me that the Earth must have some sort of resistance and that the force applied must overcome the earthreisitance on...

Homework Statement Pascal's law states that " The pressure in a fluid at rest is the same at all points if they are at the same height" Also we know " Pressure increases with depth" I get confused. When pressure increases with distance, how pressure is same at all points. Homework...

One atmosphere of pressure is equal to 101,325 Pa. If the density of water is 998 kg/m3, what is the necessary depth to reach 2 atm of pressure relative to the surface Hydrostatic equation: p=-wh where p is change in density, w is specific weight (density*gravity), and h is change in...

[b]1. Homework Statement [/ The value of acceleration due to gravity (g) at an altitude (h) is gh = g (1 - 2h/R). Similarly the value of g at a depth (d) is gd = g(1 - d/R), where R is the radius of the earth. Homework Equations In both the cases, my book says the value of g decreases...

Homework Statement for my assignment given i was told to derive the equation of the skin depth of a good conductor and i derived it as d=sqrt(2/\mu\omega\sigma) then i was told to calculate d where i was given w=10^15 and sigma=10^7 and this gave me a d of d=1.26E-8 which i guess is...

Hey everyone, Im doing this research and reading this http://science.hq.nasa.gov/kids/imagers/ems/gamma.html" it had a diagram of the depth of penetration of different wavelengths into the eaths atmosphere... my question is, How come x-rays penetrate deeper than visible light - what is the...

Homework Statement Consider a submarine cruising 32 ft below the free surface of seawater whose density is 64 lbm / (ft^3). What is the increase in the pressure in psi exerted on the submarine when it dives to a depth of 172 ft below the free surface? Assume that the acceleration due to...

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...

I finally got my GJK algorithm working and now i want to be able to find the depth of the intersection of the two polyhedra in a particular direction (the direction of momentum). I figure the best way would be to find the distance from the origin of the minkowski difference to the hull of the...

Hello Forum, the formula for skin depth is both inversely proportional to conductivity and frequency omega. There seem to be 3 cases when the skin depth of a metal is exactly (or tends to) zero: 1) if an EM wave of frequency f (any frequency) is incident on a perfect metal wall (infinite...

Assignment due tomorrow & virus has deleted everything :cry: please help. AIM: To investigate the role of enzymes in the production of yoghurt from milk. I need full in depth information on the process of production in yoghurt.

Hello, i am reading on the Bohr Model. There are some parts i just do not understand. in classical mechanics, an object, such as an electron, revolving ina circle may assume an infinite number of values for its radius and velocity. Why is this? Therefore the angular momentum (L= mvr) (...

Homework Statement We know that 'g' decreases with height and the derivation for the formula is straight enough, but how is the formula for decrease of 'g' with depth derived? The Attempt at a Solution If an object is taken to a height 'h' above the surface of the Earth and...

Dear all I am slightly confused over the equations for skin depth. My university notes give me the equations: \delta = tan-1 (tan\delta) = \frac{\sigma}{\omega \epsilon} (loss tangent) where \delta is skin depth and \sigma is conductivity. I am also given the equation: \delta =...

Homework Statement I am a HS student researching the penetration depths of magnetic fields in conductors. Specifially, I am investigating the exponential decay of eddy currents induced within a conductor in the presence of a rapidly changing magnetic field. I am a bit confused as to why the...

Homework Statement A can of height h and cross-sectional Area Ao is initially full of water. A small hole of area A1<<Ao is cut in the bottom of the can. Find an expression for the time it takes all the water to drain from the Can. Hint: Call the water depth y use the continuity equation to...

Homework Statement a man stands by a swimming pool that is completley filled with water. his eyes are 1.8 meters directly above the edge and the pool is 12 meters wide. when he looks toward the corner on the opposite side of the pool , he estimates the pool to be 2.4 meters deep. if the...

In most books the amplitude does not change when water waves pass from deep to shallow water. In some books the diagrams show an increased amplitude. Which one is correct?

Homework Statement Hello to everybody I have this homework and my main issue is that is cannot find any bibliography to read that does what my homework requires. The problem goes like We have this recursive algorithm that calculates the sum of an array elements from array element k to array...

1. The problem statement I'm currently conducting an investigation into how a Light Dependent Resistor changes depending on the depth of a liquid above it. The experiment is pretty simple, however the write up is somewhat more problematic. Firstly I'm asking whether I should read voltage...

Homework Statement The problem is to find a well's depth Vo that the electron which is trapped inside has two stable states. Well starts at x=0 and ends at x=L. Homework Equations The Attempt at a Solution I tried to solve Schrödinger equation for each area (x<0 0<x<L x>L) but...

Homework Statement A glass tube of radius 0.80cm contains liquid mercury to a depth of 64.0cm at 12deg. Find the depth of the mercury column at 100 deg. Assume that the linear expansion coefficient of the glass is 10 X 10^-6 K-1 and the linear expansion coefficient of mercury is 0.61 X 10^-4...

I am building a home aquaculture system using air lift pumps. I have formulas for calculating water flow and for metering my cfm with orfices. My question is how does water depth effect air flow. I know that 1 psi = 27.68 inches of water. So my question is do I need to increase my psi...

Homework Statement A perfectly spherical golf ball with a specific gravity of 0.55 is dropped from a height of 10 m above the surface of a smooth lake. Determine the maximum depth to which the ball will sink. Neglect any frictional loses or energy transferred to the water during impact and...

Homework Statement There is a pool 5.50 meter wide filled to the top with water, A ray of light originates at the bottom left corner of the pool leaves the far upper right side at an angle of 14o. The question is asking for the depth of the pool Homework Equations...

Homework Statement A vertical cylindrical tank of cross-sectional area A_1 is open to the air at the top and contains water to a depth h_0. A worker accidentally pokes a hole of area A_2 in the bottom of the tank. Derive an equation for the depth of the water as a function of time t after...

Homework Statement A large aquarium of height 5.00m is filled with fresh water to a depth of 2.00m. One wall of the aquarium consists of thick plastic of 8.00m wide. By how much does the total force on that wall increase if the aquarium is next filled to a depth of 4.00m. D= density...

Homework Statement By what percentage does the density of water increase at a depth of 3.7 km below the surface? (change in p/p)Homework Equations P = pgh where p = density p of water = 1000 kg/m cubed h = 3.7 km = 3700 m bulk modulus of water (b) = 2 e 9The Attempt at a Solution b = -...

Well, I had always thought that it's nicer to have multiple degrees and stuff to get into grad school, but the more I lurk around here, the more I see people recommending additional mathematics courses and in-depth physics courses beyond the normal curriculum. Currently, I think I'll be...

What are some examples of pressure and depth?

Hi all, I have this problem : A coin is dipped to the bottom of a water filled container made of an opaque material. Observed from the water surface, the depth of the coin appears to be 2 meters. Find the real depth ( R.I. of water = 1.33 ) Since angles are not given, how do I apply...

Homework Statement A fish is 80 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly above the fish? (For water, n = 1.33.) Homework Equations Snell's law: n_1 sin \theta_1 = n_2 sin \theta_2 The Attempt at a Solution So...

Homework Statement Atmospheric pressure is 100 kPa and a depth of 1m in water is equivalent in pressure to 10 kPa. A jam tin, open end down, is forced under water until the water half fills the can. At this stage, how far beneath the surface is the can? (ans is 10 m) Homework...

Though this sounds silly in itself to ask, I would still ask it. Is there any animal or bird which lacks the ability of depth perception? How would the world look to humans if they didn't have the ability to perceive visual depth? I'm not a biology or science student. Therefore, please be...

Why is the speed of water waves dependent on the depth?

Ok. There are 2 universal beams. One is 500mm deep and the other one is 400mm deep. For both beams, the top and bottom flanges are 200mm wide x 10mm deep. [SPAN of the beams is not given] Questions is..If the maximum bending moment capacity of the 400mm deep universal beam is 200 kn.m. What...

A fathom is a method for measuring lengths, usually reserved for measuring the depth of water. A fathom is approximately 6 ft in length . Take the distance to the moon to be 250 000 miles, and use the approximation above to find the distance in fathoms . I try to solve : I fa =...

hi guys. i have the london penetration depth defined as \lambda_l = \sqrt{\frac{m^{**}}{4\pi n_{s} e^{2}}}. i'm trying to figure out the dimensionality of it...surely it must be a length, but i get [(Kg)(m^{3})(A^{-1}s^{-1})]^{0.5} in SI units. am i doing something wrong? cheers.

After all, many of you have probably read/experienced dozens of books/papers/articles about many subjects. Not just science, but social science, whatever cultures you happen to be interested in, and the communities you grew up in. And of course, most people you talk to will only appreciate your...

An air bubble has a volume of 1.75 cm3 when it is released by a submarine 125 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume that the temperature of the air in the bubble remains constant during ascent. P= a+h*g*density a=101325Pa...