Stream Definition and 174 Threads

Hello, I am thinking about a real-life problem: the flooding of a stream in may area of town. A stream discharge, ##Q=A v##, represents the volume of water passing through the cross-sectional area ##A## in one second as the water moves with speed ##v##. Let's assume that the stream has 2...

Hi Sorry about the stupid question. I am completely green on tv streaming. I have a limitation of 25MBPS internet connection. I know 4K video needs 25MBPS speed. That is I can ONLY run one tv. I really don't care about the clarity and resolution. I have modern smart tv, but I am still feeding...

Hello, I've bin the mid of my Msc in physics preparing for gate/ net exam 2023. I don't know which stream to choose for research. I am highly highly interested in solar energy, green energy and mechanical engineering as well but I don't know what to do as I am not an engeenering student. I...

This question is about sail aerodynamics, more precisely what cause spanwise airflow at the sails? When sailing close hauled,at the jib windward middle and top tell tales stream up or at 45 degress up, all others leeward and bottom windwards tell tales stream horizontaly. 1. What cause airflow...

Streaming now:

It's clear my theory about how streaming services stream is flawed. Let me 'splain: We watch a lot of BritBox (like, a lot). Britbox is a streaming service, like Netflix and Disney+ and Prime Video (all of which we also have) on our Smart TV. We are trying to watch a specific (new) show ("Why...

Summary:: Stoke stream function [Mentor Note -- Thread moved from the technical forums, so no Homework Template is shown] Why the quantity of fluid that crosses the surface of revolution formed by the vector OP is ?

I'm trying to perform depth estimation on stereo vision using live feed. I'm using two webcams. The code below doesn't give any error but I only get a block box without any sign of live video! Could you please give it a look? leftCam = imaq.VideoDevice('winvideo', 1, 'MJPG_320x240')...

Okay, so I don ' t have any real specs but i just want to know how big is the difference between water from tap versus the one from fire hose versus the pressure washer?

I found vlog=1.9/t and vb-v=1.15/t and vb+v=d+1.15/60.8 don't know what to do now

I am collecting data from a Geiger-Muller radiation detector, which generates clicks that correspond to particles entering the detector. These clicks come in purely at random, so the number of clicks in a given time interval are governed by the Poisson distribution. My job is to find the average...

Artemis Fowl may not be familiar to many, but I like because I read these with my kids when they were young. Artemis Fowl is a kid genius in a criminal family, becomes aware of the well hidden work of faeries and leprechauns and wants to take it over for criminal purposes. It has similarities to...

Hello everyone. =) In honor of Pi Day I'm going to be explaining the very beginning of set theory (which I consider the beginning of university math) live on Twitch in about two hours (1 PM GMT). For those who do not know Twitch, it's a completely free streaming platform - you can come in and...

Hello, I have built a device and i want to test different types of nozzles. Problem is; the size of the nozzles i need are hard to find in company stock. So i need to make sure before i make any order. I have no background or degree any related area so it is hard to understand the equations...

when we transfer water vapours from steam generator isn't it like that the pressure of atmosphere around the organic mixture will increase so we have to boil the organic mixture more so as to make equal the pressure of atmosphere which is water vapour pressure + pressure of atmosphere is equal...

Summary: Hello, I need some help with this problem since my professor is bad at explaining (he reads a book and repeats everything), there's a problem online similar, but values and what is asked is different. A gas stream (1) contains 18 mol% (40.2 mass%) hexane and remainder nitrogen flows...

Not sure how to go about it

The following is a client-side C# code: string Host = "localhost"; int Port = 2000; TcpClient Tcp = new TcpClient(Host, Port); NetworkStream stream = Tcp.GetStream(); reader = new BinaryReader(stream); writer = new BinaryWriter(stream); writer.Write("Hello"); string str =...

Hello, I'm trying to figure out the best way to stream a live video feed from a webcam connected to a small computer such as a raspberry pi. Preferably the most lightweight solution to capture and stream the video across the network so it can be embedded into a website. I'm trying to use the...

Homework Statement (For this problem ignore the height of the firefighter) A firefighter, a distance (d) from a building, shoots a stream of water at an initial angle, above the horizontal, at initial speed (Vo). At what height (h) does the water strike the building? No values were given to...

Here is the experience: I put two electrodes inside paraffin oil (separated by at least 3cm), and submitted the electrodes to high voltage. At 20000 V - 30000 V, strong streams can be observed inside the paraffin oil. Since paraffin oil is a good dielectric, I just would like to understand the...

A float consists of four bytes. I am using a data stream of floats through radio. This data occasionally is not a float though, and sometimes I'd want to stop the logging of floats of the stream, by inserting a "stop char", which would be checked by the program. Previously I was using simple LF...

I observed something which I've never seen before. We left the tap open and the water stream was flowing in a particular pattern. When we placed a beaker under the water stream, the pattern disappeared. And the pattern itself was oscillating. Here's the video link. Below the the photos of the...

Hi guys! I have question regarding vacuum and underwater pressure if anyone here could help me out with it. I'm not really a physics person (my math skills suck too much, lol), but I do find it very interesting. I recently bought some breathable stockingfoot fly fishing waders and whenever I...

If i have atm temperature around 32 deg Celsius, volumetric flow 6000m3/h, fluid temperature inlet 47 deg Celcius. How to get minimum possible dimension for my canal if its maximum possible length is 180 m and fluid temperature outlet at least 40 deg Celcius?

This is a problem for a fluid dynamics class I'm in. My current approach is to use a conservation of mass approach and say that the d/dt(momentum in the cart) = momentum into the cart. This leads to (u is speed of the cart, V is volume J is jet velocity, A is cross sectional area of the jet)...

Homework Statement The velocity components in a steady, incompressible, 2-D flow field are u = 2y v = 4x Find the corresponding stream function. Homework Equations u = ∂Ψ/∂y v = -∂Ψ/∂x The Attempt at a Solution I can verify that a stream function exists for this problem because...

Hello, I got this stream function ψ(r,θ)=sqrt(r)*sin(θ/2) I have to draw the streamlines of this fuction, however, I'm not sure how to afford this, should I consider this just like a normal function that depends on tetha and rho, or it's more like a polar plot? When i drew the streamlines...

Not really sure what's happening here, did a short search online to see if anyone else has documented this before. (If it's not clear from the photo, there seems to be a air bubble trapped right under the stream) It sustained itself for a couple minutes, took a short video of it too before it...

The W7 is a stream cipher or a key stream generator. What does W7 stand for?

I was zooming around the NE region of the South Island of New Zealand in Google Earth today and discovered a classic example of offset stream channels across a major fault, the Awatere Fault. The Awatere Fault which is one of the major faults that the Alpine fault splinters into in the upper...

From, http://www.bbc.com/news/science-environment-38372342 "Scientists say they have identified a remarkable new feature in Earth’s molten outer core. They describe it as a kind of "jet stream" - a fast-flowing river of liquid iron that is surging westwards under Alaska and Siberia. The...

Homework Statement The planet Jupiter has a moon Io. Volcanic activity on Io releases clouds of electrons which travel at high speeds towards Jupiter. During a 15 s time period, 2.6 × 10^26 electrons reach Jupiter from Io. Calculate the current.Homework Equations I know current I = Q/t...

Hello everyone, Not sure if this is the right place but... I probably have a stupid question here but is it possible to stream an RTP/RTCP video stream from an IP camera to an Android device? I am not a programmer but am trying to select a camera to use for my current project. I have done...

Hello! I'm having trouble finding out how to calculate the force with which a river can push an object, well an propeller to be more exact. I would like to know what do I need to find about the river, like speed and cubic metres, and how do I use this information to calculate the force with...

Hi PF! I am wondering why we define velocity for polar coordinates as $$\vec{V} = \nabla \times \frac{\psi(r,z)}{r} \vec{e_\theta}$$ and why we define velocity in spherical coordinates as $$\vec{V} = \nabla \times \frac{\psi(r,\phi)}{r \sin \phi} \vec{e_\theta}$$ The only thing I don't...

Homework Statement A one-dimensional stream of particles of mass ##m## with density ##\lambda## particles per unit length, moving with speed ##v##, reflects back from a surface, leaving with a different speed ##v'##, as shown. Find the force on the surface Homework EquationsThe Attempt at a...

Homework Statement So the question is to plot the streamlines of the stream function. ψ(r,θ)=[v][/0](r-1/r)sin(θ)=constant Homework Equations Im asked to do this in MATLAB or maple. preferably maple. But equations that is needed to plot it is also totally fine. The Attempt at a Solution It...

A stream of water from a water hose can be modeled by the graph of y= -0.003x^{2}+0.58x+3 where x and y are measured in feet. a firefighter is holding the hose 3 feet above the ground, 137 feet from a building. will the stream of water pass through a window if the top of the window is 26 feet...

Is it good if an aircraft has lot of streamlines ?

I need to calculate some quantiles for a sample of 108 real numbers with unknown mean and unknown variance. I currently store and sort those numbers, but I would try a streaming method where the numbers are not stored. In a paper is written: "If the size of the input stream, N is known, then the...

Homework Statement I'm making a program that draws a graph of the weight of an hourglass. Obviously at first we know the weight, and as the grains begin to fall it decreases by the amount of mass in free fall. However I ran into a problem when the grains begin to hit the bottom. It's impossible...

How did they go from ∂Ψ/dθ = m to Ψ = mθ + f1(r) ? I mean I understand how they got mθ but can someone explain the f1(r) term? Similarly, how did they go from -∂Ψ/dr = 0 to Ψ = c1 + g1(θ) ? I understand how they got c1 but why the additional term? I can't provide further working out as...

I want to design a wind toubine ,I know the wnd vel,I need certain amount of power ..How to design it and how to calculate at which rpm will it rotate to deliver my required power?

Homework Statement The problem want me to do a degree of freedom analysis on the following process using the information provided. There are two chemical rx in the process. The desired production rate of DEA (D) is 105,000 kg/h. The air composition is 21% mol% O2 and 79 mol% N2[/SUB. 25% of...

Homework Statement i want to know about the variation in pressure according to varo=ious depth in different water bodies like for river, lake, stream, and all with the possibility of having fresh water or salty water. (not talking about oceans) may be shore of a sea will also work. Homework...

Hey pf! Learning about macroinvertebrates and their relation to stream systems, and I am trying to understand what stream factors affect their distribution and diversity! I understand that flow rate, and substrate for example have an affect, but why exactly flow rate affects macro's is still a...

Homework Statement What is the time needed to complete a trip if v = V. Homework Equations t=(2Dv)/v^2-V^2) The Attempt at a Solution I drew a diagram and tried plugging values in.

Every paleo climatology book that discusses the Younger Dryas abrupt cooling event - the Younger Dryas is the name for a period 11,900 years ago when the planet when from interglacial warm to glacial cold with 70% of the cooling occurring in less than a decade and the cold period (during the...

This week (Jun 7-12, 2015) at Penn State: General Relativity and Gravitation: A Centennial Perspective http://event.gravity.psu.edu/index.shtml There will be a live stream of the plenary sessions. For the updated schedule and link to the streams, consult...