Depth Definition and 340 Threads

Homework Statement Estimate the density of the water 5.3 km deep in the sea. (bulk modulus for water is B=2.0 *10^9 Homework Equations \DeltaV/V=(-1/B)*\DeltaP dP/dY=-\rhog The Attempt at a Solution I tried to use the equation: P=Po*e^(-\rhoo/Po)*gh But i kept getting ridiculously large...

A plane mirror is placed on the level bottom of a swimming pool, which holds water to a depth of 3 m. A swimmer is located 2.0 m above the mirror. An observer above the water looks vertically downward at the swimmer and its image in the mirror. What is the apparent difference in depth between...

Homework Statement I have tried this problem six times and it's still wrong. The problem is A research submarine has a 22.8-cm-diameter window 7.9 cm thick. The manufacturer says the window can withstand forces up to 1280000 N. What is the submarine’s maximum safe depth? The pressure...

if I want to calculate the pressure at a given depth in the ocean or a lake 1 atmosphere of pressure will support a column of water 32 feet high right? so if the lake is 20,000 feet deep can we just divide 20,000 by 32 and get 625 atmospheres at the depth? i see that the...

Homework Statement 'Briefly explain the importance of skin depth in the context of radio communications.' Homework Equations The Attempt at a Solution A guess would be that, the frequencies of the radio transmissions should be kept small so that the signal has a large skin depth...

I placed a cellphone in 2 half-spheres that i closed afterwards to create a metal cavity (aliminium 1mm) and called it (with another cellphone). The phone rang even if it wasn't supposed to considering the skin effect (wavelenght were about 0,04m and i couldn't see any holes). Anyone has a clue why?

A stone is dropped into a well. The sound of the splash is heard 3.96 s later. What is the depth of the well?

I have trouble understanding why water waves tend to speed up for waters deeper than 1/2 wavelength and slow down for waters shallower. I have read it has something to do with how the particle orbit changes to elliptical in shallow waters. Why does the particle orbit become a flat ellipse in...

Homework Statement A 1.6 m long glass tube closed at one end is weighted and lowered to the bottom of a freshwater lake. When the tube is recovered, an indicator mark shows that water rose to within 0.32 m of the closed end. Assume the temperature is constant, the acceleration of gravity...

Homework Statement A 7.00 g bullet, when fired from a gun into a 1.00 kg block of wood held in a vise, penetrates the block to a depth of 7.40 cm. This block of wood is next placed on a frictionless horizontal surface, and a second 7.00 g bullet is fired from the gun into the block. To what...

hi there, I am stuck on this question can some give me a hint on how to solve the question: the question is: Calculate the skin depth for copper at 1.0 GHz . σ = 5.8x10^7 S/m, εr=1, μr=1. the formula i think that i need to use is tan δ = σ / (ω)(ε0)(εr) ω = 2nf = 2 x n x 1 x 10^9...

Homework Statement A small logo is embedded in a thick block of transparent material (n = 1.73), 3.59 cm beneath the top surface of the block. The block is put under water (n = 1.333), so there is 1.86 cm of water above the top surface of the block. The logo is viewed from directly above by...

Homework Statement A 4.0m wide swimming pool is filled to the top. The bottom of the pool becomes completely shaded in the afternoon when the sun is 20 degrees above the horizon. How deep is the pool? Homework Equations \theta = arcsin(n2/n1) n1sin\theta1= n2sin\theta2 The...

Homework Statement A stone is dropped into a well. The splash is heard 3 seconds later. What is the depth of the well? Homework Equations the change in t= change in length/ velocity of sound The Attempt at a Solution V= 343 m/s which is the speed of sound Ok I solved for...

Hey guys sorry my first post is a help request and not an introduction or anything but I'd really appreciate a helping hand here Homework Statement Show that the extinction A(λ) and optical depth τ(λ) are related by the linear relationship A(λ)=1.086*τ(λ) Homework Equations...

Homework Statement A stone is dropped from rest into a well. The sound of the splash is heard exactl 2.00 s later. Find the depth of the well if the air temperatrue is 10.0 degrees Celsius. Homework Equations Possibly the Kinematics Equation V= Vo sqrt(1+Temp/273) The Attempt at a...

Homework Statement Evaluate the net force on a 200 -m high dam with a 60 mwater depth. Homework Equations P=F/A p(hydrostatic pressure)=rhogh+patm The Attempt at a Solution The atmospheric pressure acts on both the dam and the water, so it cancels out of the equation. g=9.8m/s^2...

Question about "naked" swimming at great depth after pressurisation In the 1989 movie The Abyss, we see Ed Harris' character briefly swim without pressure suit (couldn't fit this into the title, hence the word 'naked') from one cabin to an other, several hundreds of meters below sea level...

Homework Statement In a vessel, a layer of benzene (n=1.50) 6 cm deep floats on water (n=1.33) 4 cm deep. Determine the apparent distance of the bottom of the vessel below the upper surface of the benzene when viewed vertically through air. Ans 7 cm Homework Equations Snell's law n sin...

Homework Statement A tube of length L = 25 m that is open at one end contains air at atmospheric pressure. This is done in Denver so atmospheric pressure P = .667 X (1.10 X 105 Pa). The tube is thrust vertically into a freshwater lake until water rises halfway up in the pipe. Find the depth...

Homework Statement A 7.00 g bullet, when fired from a gun into a 1.00 kg block of wood held in a vise, penetrates the block to a depth of 7.60 cm. This block of wood is next placed on a frictionless horizontal surface, and a second 7.00 g bullet is fired from the gun into the block. To what...

Homework Statement A 2.1 m long glass tube that is closed at one end is weighted and lowered to the bottom of a freshwater lake. When the tube is recovered, an indicator mark shows that water rose to within 0.43 m of the closed end. Determine the depth of the lake. Assume constant temperature...

Homework Statement A research submarine has a 40.0 cm-diameter window 8.50 cm thick. The manufacturer says the window can withstand forces up to 1.20×10^6 N. What is the submarine's maximum safe depth? The Attempt at a Solution The area which force will be exerted on is A= Pai * r^2 =...

cavity on a water surface A vertical air jet from a straw produces a cavity on a water surface. What parameters determine the volume and depth of the cavity?

Homework Statement Although human beings have been able to fly hundreds of thousands of miles into outer space, getting inside the Earth has proven much more difficult. The deepest mines ever drilled are only about 10 miles deep. To illustrate the difficulties associated with such drilling...

Hi guys, I'm trying to find a reliable formula for calculating the depletion depth in a PIN diode at a given voltage and knowing the doping of the layers. Does anyone have one? Formulae for the PN diode are common, but don't apply to the PIN directly as far as I can see. I found a formula...

Hi, Excuse me for not putting this post on Academic Advise. I am a mechanical engineering student and therefore would like to target my question to the general ME audience who might have a better understanding of the field. I see myself as being an engineer working in the industry after my...

Homework Statement We have to do a project on finding out the relationship of velocity of the impact to crater depth by experimental methods, then we are supposed to find out the answer on the internet and compare it without experimental results. However, i couldn't find any website that wrote...

Hello, I am trying to figure out how many effective bits of color depth are carried in the red channel of a number of averaged pixels. For instance, a single 24 bit pixel carries 8 bits per color channel (RGB). Therefore, you can generate 2^8 = 256 red levels, 2^8 = 256 green levels...

hi all i run into some contradictions while studing electromagnetics. you know skin depth decreases when frequency increases.It ans that waves of higher frequencies have lower skin depth. ok and every one of us knows that X-ray have higher frequencies than other waves for example radio...

[FONT="Georgia"][SIZE="3"]Homework Statement The bore hole of depth 2000m contains both oil and water as shown. The pressure at the bottom is 17.5MPa. The density of the oil is 830kgm^-3 and the density of the water is 1000kgm^-3. http://img384.imageshack.us/img384/6944/10062008fj0.png What...

Homework Statement The cross-section of a gutter can be represented by the quadratic: y=4/11x^2-4x+11 where x and y are measurements in cm. Calculate the width of the gutter where the depth is 6cms. Homework Equations The Attempt at a Solution my answer was 1.26cm or 12.6mm but...

Homework Statement A conical tank (with vertex down) is 10 feet across the top and 12 feet deep. If water is flowing into the tank at a rate of 10 cubic feet per minute, find the rate of change of the depth of the water when the water is 8 feet deep. Homework Equations Cone: V= (Ah/3) Right...

I need help in determining trolling lure depth for fishing. I imagine this formula would have to take into account line length, lure weight, and boat speed. I'm no math wiz, so if someone can help, It would be greatly appreciated! Thanks.

[SOLVED] Finding the Depth of Water... [SIZE="2"]Hello, Can you guys help me? I have to answer this question for Physics Class: "An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic sound that travels 1530 m/s in seawater. How deep is the water if the time delay of the echo...

Hi Everyone! I was wondering if someone could help me with Optical Depth, I read some articles about it but since my English isn't that good I couldn't Get it well! I have some views about the Opacity But when it comes to optical depth I'll get lost :D help!

a) Calculate the pressure at an ocean depth of 550 m. Assume that the density of sea water is 1022 kg/m3 and that the air above exerts a pressure of 101.3 kPa. b) At this depth, what force must the frame around a circular submarine porthole having a diameter of 32.0 cm exert to counterbalance...

Problem 1: A thin hollow glass sphere has a radius of 1 m. A coin is placed at the bottom of the glass sphere. 2.09 metre cube of a liquid of refractive index 1.5 is poured into the glass shpere. A person is viewing the object vertically. What is the apparent depth of the coin? Im not sure...

A cylindrical container 1.2 m tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water. If the pressure at the bottom of the cylinder is 1.9 atm, what is the depth d? Does anyone have any ideas on how to approach this problem, better yet,solve it!?

Homework Statement A flat-bottomed barge, loaded with coal, has a mass of 3.0 105 kg. The barge is 20.0 m long and 9.8 m wide. It floats in freshwater. What is the depth of the barge below the waterline? ____ m Homework Equations The Attempt at a Solution I have no idea which...

Homework Statement A research submarine has a 17cm diameter window 6.0 cm thick. The manufacturer says the window can withstand forces up to 1.0X10^6 N. What is the submarine's maximum safe depth? Assume that the pressure inside the submarine is maintained at 1.0atm and that the density...

Homework Statement hey guys I'm kinda new to this forum and was wondering if you could help me on this fluid question i was having; Fig. 15-47 shows a stream of water flowing through a hole at depth h = 17 cm in a tank holding water to height H = 43 cm. (a) At what distance x does the...

[b]1. A hollow cubical box is .30 m. This box is floating in a lake 1/3 of its height beneath the surface. The walls of the box have neglibe thickness. Water is poured into box. what is the depth of the water in the box at the instant the box begins to sink? pwater= 1000kg/m3 Fb= Pfluid G V...

[SOLVED] Impulse and depth********! Homework Statement In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 58 m/s (terminal speed), that his mass...

Hi, I have been trying to understand the formula for the drag of an object vs the depth of the object in Water. The variables are Velocity, Mass, Weight. Velocity being in Miles per Hour. Mass taken from the cross section of the weight as it moves through the water and the mass of the line used...

The base of a cone-shaped tank is a circle of radius 5 feet, and the vertex of the cone is 12 below the base. The tank is filled to a depth of 7 feet, and water is flowing out of the tank at a rate of 3 cubic feet per minute. Find the rate of change of the depth of the water in the tank.

https://www.physicsforums.com/archive/index.php/t-77612.html here's a link to the same question which has already been inquired before by someone else. according to the question, it asks to calculate the "actual" depth and once I have read all the replies on that page, the author seemed to...

Homework Statement The bottom edge of the opposite side of an in-ground pool (n=1.33) is just visible at an angle of 18 degrees above the horizon. If the pool is 2m wide what is the depth? I think I'm stuck on trying to relate the refraction formulas as to determining depth. .. any tips...

I've looked everywhere to try to solve this problem and I can't find anything. It is: A conical tank (with vertex down) is 10 feet across the top and 12 feet deep. If water is flowing into the tank at a rateof 10 cubic feet per minute, find the rate of change of the depth of the water when...

How can I verify the depth and size of existing caissons(assumed 100' deep) under 6 feet of concrete slab