Depth Definition and 363 Threads

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...

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 is the depth x of the...

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... 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 from the...

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...

Dream and myth: the foundation for depth psychology Freud hypothesized that dreams were a means for establishing a universal method for studying the human psyche. He felt that dreams provided a means for studying the psyche in a manner similar to that used to study the physiological...

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

Homework Statement Instead of calculating apparent depth (for example, a penny in a glass of water appears to be closer to the surface than it actually is), instead of finding the angle of refraction and using snell's law, can I use the following: Apparent Depth = Actual Depth x (n air / n...

What do people mean when they say learn math in depth, and not just memorizing formulae? How is "mathematics in depth" defined? I want to make sure I learn "in depth", so I try to play around with the rules of math, for example multiplication with exponents: How come a^m*a^n = a^m+n...

The New York Review of Books got Lee Smolin to do a 10-page review of a handful of recent Einstein books. It's definitely stereoscopic (3D). with a sense of the complex personality. nice to see the oversimplified popular images countered http://www.nybooks.com/articles/20279 Mark Trodden of...

A stone is dropped into a deep canyon and is heard to strike the bottom 13.4 s after release (the speed sound is 343m/s) What would be the percentage error in the depth if the time required for the sound to reach the canyon rim were ignored? I found the depth of the canyon =2298m then what...

there's a light source, S, sitting 2.60 metres below the surface of a pool 1.00 metres away from one side. I'm supposed to find the angle at which the light left the water and the difference between the apparent and actual depths of the light source. i attempted using Snell's Law with n...

The speed of sound in water is 1498 m/s. A sonar signal is sent from a ship at a point just below the water surface and 1.80 s later the relfected signal is detected. How deep is the ocean beneath the ship?

1. There is a 16.8 m tall oil-filled barometer. The barometer column is 80.0% filled w/ oil when the column of a mercury barometer has a height of 722mm Hg. If the density of mercury is 1.36 x 10^4 kg/m^3, what is the density of oil? Homework Equations P=Po + pgh D=m/vThe Attempt at a Solution...

I've heard this a lot - that you lose depth perception when looking out of only one eye. So I have to ask - is this true? When I try it everything looks exactly the same to me. :confused:

Homework Statement A beaker has a height of 40.0 cm. The lower half of the beaker is filled with water (n = 1.333), and the upper half is filled with oil (n = 1.48). To a person looking down into the beaker from above, what is the apparent depth of the bottom? Homework Equations...

Hi, I need have this problem check because I have a problem at the last question: the probability is 0.6 that a well driller will find a well of water at a depth less than 100 feet in a certain area. Wells are to be drilled for six new homeowners. Assue that finding a well of water at a...

I was fascinated by the Wired article describing such an elegant engineering solution for remote data collection deep in the ocean, Deep Glider: http://www.wired.com/news/technology/0,72794-0.html?tw=rss.index" But, having been out of engineering school a few decades and a bit rusty in my...

Homework Statement i)Derive the fact that hydrostatic pressure increases linearly with depth under the surface of a fluid (assumed to be of constant density). Comment on how your answer would change if density is also allowed to vary with depth. ii) Show that the force per unit volume in a...

Homework Statement A tank full of water has the shape of a parabloid of revolution with shape obtained by rotating a parabola about a vertical axis. a) If its height is 4 ft and the radius at the top is 4 ft, find the work required to pump the water out of the tank. b) After 4000 ft-lb of work...

If 1kg piece of steel hits steel surface with speed of 5m/s, how can you calculate the depth of the impact? Let's assume that the steel has 0.345 kN/mm2 material shear strength. Second question is that how much speed is needed to that same steel piece to penetrate 1cm thick steel sheet...

A steel rope consists of 100 rods. The diameter of each rod is 2 mm. The allowable rope stress is 130 N/mm^2. what maximal load can be lifted from a depth of 1000 m ? i use 100*130 N/mm^2 = 4*F(max) / pi * (4) in order to find F(max).Am i correct??how can i use the length given...

TWO questions! Distance to exp. 120dB AND Depth of Well I've got two questions here. I've worked on both of them, and now I'm stuck... 1)A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.60 s later. Find the depth of the well if the air temperature is...

Hi! I have a problem. Say I have a wooden ball, 5 cm in diameter, 40 grams, I drop it from a height of 1 meter into some still water. Obviously, it will splash in and dip a little before buoyancy forces take over and bring it to the surface, I have never heard of a way, but maybe the...

this is something that has confused me for quiet some time. the mirror is just a few millimeters thick. then how is it that we can use it to see depths of metres and kilometers. what is it that enables a mirror to show greater depth than its own

Okay, I need some help yet again. Our teacher is giving us no hints on the "mystery problem" on our test tomorrow. "A boat sends a sonar down to find a submarine underwater. The boat estimates the velocity of sound under the water to be 1500 m/s. Howeer, they are wrong about that velocity...

Many textbooks derive the relativistic momentum from the penetration depth of a bullet in a resistive media, considering that momentum is proportional with the penetration depth. Do you know a transparent and correct way to the problem?

Most of my knowledge of physics comes from popular science books. I can't help it, I don't know where to turn, I KNOW they aren't real physics but I can't find anything else. Feynman's lectures, yes, but I understand about 10% of these and don't know why as they're supposed to be "introductory"...

I have the following problem: I measure a sinusoidally varying signal at a number of phase points. I then fit a sine curve to the data points using least squares. The fitting function looks like: f = a1 + a2 cos(phi) + a3 sin(phi) I want to evaluate the modulation depth from the measurements...

Fluids -- bringing together pressure, depth and friction Hi Again! More troubles with fluids. I was pretty sure I had this one. There is a freshwater pond density, D=1000 kg/m^3 depth = 15.1 m one of the sides is blocked off by a cliff. A nearly horizontal tube diameter =...

Hi, Just wondering, does anybody know of any texts or websites that go into the science behind magnetic monopoles in any depth? I'm thinking of writing a report on them as part of my A2 course but I can't find much information about them! (apart from the fact that nobody's detected them and...

In a ten foot by 6 inch tall container filled with water were to have another container secured in it midway but had the pressure of air in it, (the bottom is open), if the smaller container has a siphon into it could you siphon in more water, or would the pressure that keeps the water from...

Hi. I was trying to solve the following problems, but I just don't understand what principles/laws/concepts I'm supposed to be using. I hope someone can give me a hint as to where I should start. Thanks a lot for any replies. 31) Gayle runs at a speed of 4m/s and dives on a sled, initially...

Suppose the depth of the tide in a certain harbor can be modeled by y=21-5cos pi t/6, whre y is the water depth in feet and t is the time in hours. Consider a day in which t=0 represents 12:00 midnight. For that day, when are the first high tide and the first low tide and what is the water...