Calculation Definition and 1000 Threads

Good day. Help me with a formula/equation to calculate water loss in broken pipes, e.g. a 63mm PVC pipe broken and spilling water.

Question: The height of the given vessel is h,and the width of the given vessel is b (as given in the diagram). The density of the liquid is r.Find the force exerted by the liquid on the slant wall. Relevant formulae : P = F/A F = Vdg An attempt at the solution...

basically i have a system where force 1 + force 2 must equal force max they have the following ratio (these are the ultimate forces as in 100% of force 1 needs to be used or 100% of force 2) force1 = 1906.901 force2 = 1760.033 simple, but to really throw me off... force 1 has to be 29% of...

Can anybody tell me how to calculate torque for rotating sweeper machine broom? Broom Dia is - 0.6 m Length - 2 m Weight - 150 Kg Rotating RPM - 150

hi all... i have problem about square roots for fast calculation, like below sample : is there fast calculation method not commonly/usually ways. it's possible? please, see my picture? thanks in advance.. susanto

hello all... would you help me out, how to sum 3 questions problem.. please, see my picture attachment.. thanks for your helping... susanto3311

Could someone just check these calculation results for me please. I know this is really basic, and I'm assuming they aren't right but I couldn't see where they were wrong, so any help would be appreciated. (I know I've been given loads on this forum already, and I am grateful). v =...

I calculated the Edissolution of a reaction and resulted in a negative number. However, during the wet lab the reaction was clearly endothermic since there was a drop in temperature. I used the equation: ∆Edissolution = Ccup∆Tcup/mass of salt What is the reason for the negative number? Would i...

Hi Suppose I have three motors connected to a single busbar which is fed by a single transformer and suppose that the current into the busbar (i.e. the total current of the transformer secondary) is known. If I wish to calculate the transformer voltage drop the I will obviously need the load...

I want to calculate the torque coming onto a half shaft in a very particular event. The event is I let's say I am in 3rd gear and have reached my max torque zone after which I have taken my foot of the acc pedal...nw I m letting the the vehicle coast as soon as it reaches say 60% of max power...

Hi, I was reading about bicycles the other day and a question popped up in my head: Does the rider's weight and height affect the speed of the cycle? I have been researching extensively about it but I cannot find any formulae that can be used to measure the effectiveness of the height and...

Me and my friends have been trying (b) for soooo long! we have gone to PhD students and some fluid dynamic doctors for held and they cannot figure this out. 1. Homework Statement 2) This question concerns the design of a ‘micro-chemostat’ device. E. coli exhibiting chemotaxis can swim up to...

Homework Statement I am trying to derive the formula for time varying thrust given that I know the initial mass/volume of water in a water rocket. Knowns will include initial pressure, initial volume of water, and nozzle cross sectional area. Homework Equations Bernoullis equation: (p/ρg) +...

Hi can anyone please suggest me how to find out the rate at which gas in LPG cylinder reduce.Initially before use gas cylinder will be full as the consumer start using the gas it starts reducing how do i calculate how much is left out and the rate at which it is getting reduced ,And also if a...

The book calculates the commutator $[H,x_i]$ as $$[H,x_i] = \left[ \sum_j \frac{p_j^2}{2m}, x_i \right] = \frac{2}{2m} \sum_j p_j \frac{\hbar}{i} \delta_{ij} = - \frac{i \hbar p_i}{m},$$ where the hamiltonian operator $H$ is $$H = \sum_j \frac{{\mathbf p}_j^2}{2m_j} + V({\mathbf x}).$$ The book...

EURONCAP front crash test involves crashing a car moving at 64 kph onto a deformable barrier at 40% of the total vehicle width. According to the EURONCAP website, this is equivalent to two vehicles crashing into each other at 55 kph. How did they arrive at this figure? I presumed that the...

Homework Statement A solid metallic cube of heat capacity S is at temperature 300K. It is brought in contact with a reservoir at 600K. If the heat transfer takes place only between the reservoir and the cube, the entropy change of the universe after reaching the thermal equillibrium is A...

i want to calculate YAW angle for the device movement(consider car turning angle), anyone suggest me the good sensor to calculate the YAW angle...

I think we have a problem with this rule. This is my understanding of the existing rule. Am I close? The rule for calculating the power distribution on a power split planetary gear system is based on the equal force rule. To calculate the power on the sun and ring of a planet set with input...

I've been working exclusively in SI units up until now, so using the US System trips me up. Given force in pounds-force, I divide it by mass (units are pound-mass) to get acceleration. I take the integral of acceleration to get velocity, which, according to the US Units, are in mph. Am I...

Hi All... I have to design a chain conveyor. I am new for this conveyor design. Here i have to find friction between chain and bottom . But i have mass and velocity only .How can i calculate this .please help me

Homework Statement [/B] Consider a square whose successive sides of length L has resistances R, 2R, 2R, R respectively. If a potential difference V is applied between the points (call them , say , A and B) where the sides with R and 2R meet. Find the magnetic field B at the center of the...

Hi there, I am wondering how to calculate the reflection coefficient of walls upon incident light versus wavelengths,, thanks

Ok I know this should be easy but it's been a few years since my physics lessons at college and I'm stumped. I work in packaging. I'm working on a tool that will tell me if a box will fall over when it is subjected to an edge drop test. That means that a block is placed under one edge of a box...

Homework Statement How we can determine The diameter of the lens of the camera approximitly that this picture took with that? ( we know that lens of the camera made by some parts but we count them as a thin one in Practical calculations ) Homework Equations m = q / p 1/f = 1/q + 1/p f =...

Hi there, I am covering a topic on welding at university and I am struggling with deriving the second moment area for the structure attached. The desired second moment of area is also given in the attached image. The first part is particularly confusing to me as I know that the total second...

Homework Statement A body, which has mass of m = 1 kg , is dropped with a horizontal speed of vo = 20 m/s . What is its kinetic energy after 4 s ? Homework Equations Ek = mv2/2 s = vot + gt2/2 The Attempt at a Solution Is it correct? P. S. There is a mistake: Ek = 3200 J

Homework Statement Decomposition of 2 moles of NH4NO3 at 100 degrees C.calculate work done Homework Equations NH4NO3 (s)→N2O(g)+2H2O (g) work done= - RT delta n here R=universal gas constant T=temperature in kelvin and delta n=difference in number of moles of products and reactants. The...

I'm a Automotive engineer and hence lack the electrical engineering expertise that you might expect. This is related to a doubt I have in calculating the final battery voltage for an electrical vehicle. This is just a calculation query. I have a module consisting of 12 individual Li-ion cells...

Hello Can anybody help me find my mistake in the following reasoning for light falling on a photodiode : "When 0.1464 watts/m2 fall on a 7.34 mm2 window, 1.07E-06 watts will penetrate and for a 0.38 A/W photodiode will produce 4.08E-07 amps which, across a 100k resistance will produce 0.0408...

Hi all, I need to calculate the friction coefficient between road and the tyre of the car. I came across few answers like which solves as from the following torque equation. Engine torque = braking torque + acceleration troque + Inertial torque + drag torque + rolling resistance. For...

Hi, Currently I am working on a project to find out the force required to open/close the gripper for holding a circular tube. I have used torsion spring between the two gripper and it will work like a clip. The circular tube is SS316 and the gripper is made out of Aluminium 6061. Stainless...

I'm looking for someone who can help me calculate the torque there will be transferred to my couplings between the rollers and to my belt connecting the 2 set of rollers. I have drawings of it all including inventor pro 2011 drawings/file of it all putted together without the belt and couplings...

I'm reading Gourgoulhon's Special Relativity in general frames. In chapter 11, which is about the principle of least action, he constructs the relativistic version of this principle but I have problem with one part of it. At first, he introduces Lagrangian and then from the fact that the action...

Anybody can help me for calculating pressure drop in pipeline. I really appreciate the suggestions from your side. i have the values of dp for equipments and valves...i want to know how to interlink with these dp values for calculation...i want to know, how to calculate the dp of scrubber. i had...

Greetings. For my own edification I calculated a set of the congruence of uniformly accelerated observers in flat spacetime in the spherical polar chart. These observers accelerate radially outwards from some ##r## so that their horizons are at the same position ##r_h##. This requires that...

(Sorry text is hard to read, please see attached document for an easier read) I am having trouble with #6, I'm not sure if what I have going on is entirely correct. Also #7 is a little confusing. Problem Statement & work done: For an object in orbit around a second, there are five LaGrange...

Homework Statement I've been working on this question for a while but can't get anywhere. I was able to calculate Force BD and Force CE Now I am not sure how they calculated the area of section BD the math isn't making much sense to me Homework Equations σ = P / A A= π r2 The Attempt at a...

OK. This may be a stupid question but here it goes. :D When thinking about the measurement of current in Amperes how is the speed of the current factored in the equation? Let me try to illustrate using example. Amperes is the measurement of the number if electrons or coulombs passing a given...

Hi to all of you, As the Biot-Savart-Law is based on experimentations in air, i like to know how to calculate the magnetic flux density in material with much greater permeability, where the circular like shape of the field distribution troughout the vicinity does not apply. Does anyone has a...

Hi folks Please bear with me, I'm new here and this may not be the correct forum to ask this question. If this is the case, I'll of course remove my question and ask it the appropriate place instead. However, here it goes: I need to be able to calculate how much a given intensity of gamma...

Hi, I am designing a beam to replace a load bearing wall. I have produced 2 separate UDL diagrams which, one for floor load and one for wall load. I am trying to find shear force and bending moment as in one for the total of the two diagrams. I know how to do it if the loads are spread...

Hello everyone, I am asked to calculate ##\log (e^{1+2i})##, and I would appreciate it if someone could verify my calculation.. My textbook defines ##\log z## as ##\log z = \ln |z| + i \arg z##. ##\log (e^{1+2i}) = \ln |e^{1+2i}| + i \arg(e^{1+2i}) \iff## ##\log (e^{1 + 2i}) = \ln|e e^{2i}|...

[FONT=Times New Roman]Dear all, I have inquiries about the Bohr's calculation for energy loss of charged particles. These inquires are from the "Techniques for Nuclear and Particle Physics Experiments" (W.Leo). On page 23 of this book, it is written that: [FONT=Times New Roman]the the...

Homework Statement I'm just looking for the proper equation to use to find the moment of inertia of a complex assembly of bodies. I'm not a student and this isn't homework, but it seemed the most relevant place to pose the question. One of my hobbies is making toys and I'm trying to calculate...

I keep track of how much time I spend doing intellectual labor. It works out to 60% of my free time and 49 hours per week. I also separate my labor into two categories: hard and easy. The hard category comes to 43 hours per week since last April. That includes computer coding and writing up...

Yesterday I had a bizarre idea. I supposed that a black hole (which I assumed to be a sufficiently dense sphere) became our sun. I know this is completely wrong, but please humor me and see what I've done. Suppose we have a sphere sufficiently dense, so that the Schwarzschild radius, r_s, is...

Homework Statement Determine how many grams of Mg must react with HCl in order to produce 40 mL of hydrogen gas at 22 degrees Celsius and 1.02 bar. Also, If the Mg ribbon weighs 0.836 mg/mm, how many mm of the ribbon will you require? Homework Equations PV=nRT Mg(s) + 2HCl(aq) -->...

Hi guys can anyone please tell me that it is possible with an air conditioner of type inverter to put less energy than what the piece is receiving as heat. So let's say that on the inverter it says output KWh/ input KWh =4. Henthalpy= G+TS 4*Hinput= Houtput inside the house So to heat my...

Can someone please help me understand how two-antenna method is used to measure gain of an antenna ? I could't even find literature on it, please if anyone could even suggest any document that would also be great. Thanks.