Parallel Definition and 1000 Threads

Hi, I know this is simple but I'd like someone to clarify for me, because my lecturer wasn't clear: Obviously when the pipes are in parallel, the head losses across them are the same. But what about the total head loss for the parallel pipes as a whole? I have 3 ideas, but I'm not sure which...

Hello everyone, I am trying to solve exercise 7.21 in the "Hobson, Efstathiou, Lasenby, General Relativity. An introduction for physicists." What is asked is to show that the parallel transportation of a vector, along a closed triangle on a 2-sphere, results in an vector orthogonal to the...

Why does the total supply current increase when the capacitance value is further increased after parallel resonance is reached (where the supply current is minimum) ? I know it has to do with the phase angles but I cannot reason it out. Thanks

Homework Statement The overall resistance of the circuit is 12.5Ω. Calculate the value of the resistor labelled R in the circuit. Homework Equations 1/R = 1/R1 + 1/R2 R = V/I The Attempt at a Solution I understand that you use the first equation for parallel resistors and the second to...

Suppose we fire two entangled particles in a tour round-flight around the galaxy and measure their spins using two Stern-Gerlach devices after returning back to the earth. Will the correlation between their spin measurement still obey quantum correlation? According to General Relativity...

[Note: Thread has been moved to the homework forums by a mentor] This is the Given problem This is my solution part 1 - What I did here is I series the R3 and R4 (R3 + R4), and I parallel the R34 to R5 (most of the calculation are from the calculator) This is my solution part 2 The...

Homework Statement calculate R2, so the resonance is still posible ? C = 40 μF R1 = 30 ohm L = 9mH image : http://postimg.org/image/kampvczv5/ Homework Equations ω = 1/sqroot(L*C) c = 1/(ω*C) XL = ω * L Z = (Z1*Z2)/(Z1+Z2)The Attempt at a Solution My approach was to first calculate the...

Homework Statement Homework Equations Rparellel=1/R1+1/R2... IR1=R2/R1+R2 x I The Attempt at a Solution I am unsure of how to answer d) and e) using KVL because I count 4 junctions? Where should I start?

(sorry, I couldn't figure out how to insert an image from my drive) I have a problem where in finding the thevenin resistance I take out my independent sources and as a result I'm left with a resistor parallel to a short circuit. Should I ignore this resistor when calculating equivalent...

Homework Statement In the following circuit, the battery has emf ε = 12.7 V. The resistors are R1 = 2000 Ω . R2 = 3000 Ω, and R3 = 4000 Ω. What is the current through resistor R2 ? Homework Equations Kirchoff's Rules V=IR The Attempt at a Solution i0 (into A) - i2 (current into resistor 2) -...

For a system of 'n' parallel plates(metal plates) bearing charges q1, q2,... qn ; why it is so that the facing surfaces of the plates bear equal and opposite charges ? How do we prove that ?

Homework Statement Consider a telescope composed of two convex lenses, the objective lens and the eyepiece. The objective lens has a focal length of 26cm. Rays parallel to the principle axis enter the telescope through the objective lens and exit the telescope from the eyepiece as parallel...

There are a few problems here but it would be helpful if The below solutions could be checked and some insight provided for the last one/any other mistakes The problem & The Solution Attempts A circuit with a 12V battery then on the row below in series with the battery is a 120nF capacitor...

It is probably a basic question, but here I go. Suppose a source emit two almost parallel light rays. The rays travel very close to each other so at short distances (the ones in laboratory) they are indistinguishable and any measurement device will detect them as one. So, the question is...

Homework Statement A line is given by the equation ##x + 2y - 3z = 7##. Find any vector in the direction parallel to this line in the Cartesian coordinate system. Homework Equations I imagine that there are some fundamental relationships I am missing here that would make this more...

Homework Statement Homework Equations I = I1 + I2 ... + In R = R1 + R2 ... + Rn 1/R = 1/R1 + 1/R2 ... + 1/Rn The Attempt at a Solution Let I1 = I2 + I3 where I1 is the current on the top wire, I2 the current on the middle wire and I3 the current on the bottom wire. 4 = 10I2 + 20I1 //This...

Homework Statement {image inserted in-line by mentor} http://imgur.com/lnURBGX Calculate the magnitude of the current through point Y. Homework Equations Ohm's Law: V=IR Kirchoff's Junction: 1/Req=1/R+1/R2+1/R3+... The Attempt at a Solution I have been told that in parallel circuits the...

I there a simple hand waving explanation why strings "can oscillate in any spatial direction except parallel to momentum" (quote from below). I assume the yellow arrows below represent momentum. Edit, why not parallel to momentum? From an interesting read on the electron...

Homework Statement A charged particle (either an electron or a proton) is moving rightward between two parallel charged plates separated by distance d=2.87mm. The plate potentials are V1=-75.8V and V2=-49V. The particle is slowing from an initial speed of 90.0 km/s at the left plate. What is...

Hi mates please are there anybody help me to make parallel program best regards

Homework Statement A parallel combination of 0.1M Ω resistor and a 10 μF capacitor is connected across a 1.5 V source of negligible resistance. The time (in seconds) required for the capacitor to get charged upto 0.75 V is approximately (A) ∞ (B) ln 2 (C) log 2 (D) Zero Homework Equations...

Homework Statement Each of two long straight parallel wires separated by a distance of 24.0 cm carries a current of 5.00 A in the same direction. What is the magnitude of the resulting magnetic field at a point that is 14.0 cm from each wire? Homework Equations U0I/2pir U0I/4pia(cos(theta)...

Homework Statement A parallel plate capacitor of area 60cm^2 and separation 3mm is charged initially at 90 micro coulomb. If the medium between the plates get slightly conducting and the plate loses charge initially at the rate of 2.5 *10^-8 C per sec then what is the magnetic field between the...

In the figure below, a potential difference V = 150 V is applied across a capacitor arrangement with capacitances C1 = 12.0µF, C2 = 6.00µF, and C3 = 16.0µF. Find the following values. Here's the diagram: http://www.webassign.net/hrw/hrw7_25-28.gif I already solved this problem but I'm having...

Homework Statement L is a perfect inductor with inductance L. The switch is turned on at t=0 and the currents i1 and i2 run trhough the circuit as indicated by the figure. Homework Equations Given this circuit I need to find i1 and i2 for t=0 and t => infinity. The Attempt at a Solution For...

Trying to figure out why an inductor in parallel with a lamp and battery will cause the lamp to GRADUALLY increase in brightness to a steady glow. I understand the concept of a coil of wire, producing a changing magnetic field when the current running through it changes then the changing...

Homework Statement A parallel-plate capacitor has a plate area of .3m^2 and a plate separation of .1mm. If the charge on ech plate has a magnitude of 5*10^-6C then the force exerted by one plate on the other has what magnitude Homework Equations Q=E Ԑ A F=qE The Attempt at a Solution so to...

Hi, I'm working on a parallel plate wave guide for wave propagation and had a question about it. Here's a quick diagram: While analyzing an EM field polarized in the y-direction, the modal impedance of the TEn mode comes out to be: Why is that negative sign there? If someone could just...

I am using TRYNSYS software to simulate solar thermal cooling. I need to install many solar thermal panels (evacuated tubes) in parallel. However, there is no feature to do that automatically in the software; so I can only add them manually with complex piping and stuff. So my question is: Is...

Homework Statement The charge on the 3.00 cm2 area plates of an air-filled parallel plate capacitor is such that the electric field is at the breakdown value. By what factor will the maximum charge on the plates increase when bakelite is inserted between the plates? (The dielectric strength of...

Homework Statement Determine the x- and y-coordinates of a point through which the resultant of the parallel forces passes. The Attempt at a Solution The first thing I did was to find the resultant forces, which is R = 0i + 0j -125 k Then I found the moment of each axis so M = (-65(12)...

Homework Statement We are told that resistor 1 has a resistance of 4700Ω ± 5% and resistor 2 has a resistance of 6800Ω ± 5% and the equivalent series and parallel resistances are to be calculated with an estimate of uncertainty. Homework Equations RSeries = R1 + R2 RParallel = R1 × R2 / R1 +...

If the vector $P = (1,2,-1)$ is parallel to the plane $7x+2y+kz = 5$, then what's the value of $k$?

Homework Statement Use data from your experiment to support the idea that Young's Modulus relates the material and is independent of shape and geometry whilst the spring constant is a function of the shape and geometry. The experiment involved stretching identicle springs (starting off with one...

so I am facing the need for low esr and high ripple current for a smps output filter after rectifier. Would it be better in terms of both ESR and ripple to put say 8x470uF in parallel or 4x1000uF ? Or maybe there wouldn't be a big difference ? Assuming both caps are with a low esr and high...

If we have a main pipe and it branches to 3 new pipes, but those 3 pipes don't connect back. Let's say that the pressure in the main pipe is 100psi (water wants to move to the right through 3 additional pipes) and the pressure at the end of each of three other pipes is 50 psi (water wants to go...

Hi, I am trying to make one of my project plug into the wall. It needs 150 Watts, at 12 volts. I am going to use laptop chargers to power it, but I only have 2, 75 Watt chargers. Both of the chargers are 12 volt chargers, and I was wondering, could I use these two chargers in parallel to...

I have a ton of 1A buck converters, and have a 5A application in which i need to run. I do not want to order any new buck converters, because I already have so many 1A ones, and do not have money for any new ones. Each one can only handle 1A before it over heats. I was wondering if I could use...

I'm in a logical loop here: 1. A tensor undergoes parallel transport if, as it moves through a manifold, its covariant derivative is zero. 2. Covariant derivative describes how a tensor changes as it moves through a manifold. 3. A tensor undergoes change as it moves if it does not parallel...

Homework Statement Fig. 25-39 shows a 12.0 V battery and four uncharged capacitors of capacitances C1 = 1.00 µF, C2 = 2.00 µF, C3 = 3.00 µF, and C4 = 4.00 µF. If only switch S1 is closed, what is the charge on (a) capacitor 1, (b) capacitor 2, (c) capacitor 3, and (d) capacitor 4? (figure at...

I have a set-up where there are multiple conductive wires separated by insulators placed parallel to one another and current ##I_w## is flowing within each conductor(all currents are parallel and equal),they create a magnetic field and I believe would add up like this diagram: The current is...

Am I forgetting some critical basic knowledge? It says: In the plane (identified by R^2) a linear equation ax+by=c is a straight line. If b=0 then this straight line is parallel with the y-axis; in the other case it is a straight line with slope -a/b. A (2 by 2)-system linear equation. Why is...

Homework Statement Consider the circuit shown in Figure P1.68. Find the current i_R flowing through the resistor. Find the power for each element in the circuit. Which elements are absorbing energy? V_source=12 V I_source=4A R=8 ohms Here is a picture of 1.68 Homework Equations P=IV...

Homework Statement A small plastic ball of mass 7.51 × 10-3 kg and charge +0.123http://edugen.wileyplus.com/edugen/courses/crs6407/art/qb/qu/c18/lower_mu.gifC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with...

Hi, I have a plane-wave incident upon a planar interface that is perpendicularly polarized with an electric field directed out of the page in the y-hat direction, perpendicular to the x-z plane of incidence. An image of the incident plane: I'm also given the general expressions for the...

Hi, I will not claim extensive knowledge of physics which is exactly why i need honest help from you all.. Writing a story based on the idea that with every single decision being made that a new time line is created.. I want it to be logical and possible even if its only theoretically...

How can I find the line of intersection between the planes 2x-y+2x+1=0 and -4x+2y-4x-2=0 I realize these are parallel as they are multiples of each other, but I'm not sure how to solve for the point. I also have to convert this line into parametric, cartesian and vector form. Sorry for the...

Homework Statement Find parametric equation of the line through the point ##(4,0,-4)## that is parallel to the planes ##x-8y+7z=0## and ##4x+3y-z+4=0##. Homework Equations ## \vec r = \vec r_0 + t\vec v ## (for orthogonal vectors) ## v \bullet w = 0 ##[/B] The Attempt at a Solution So I...

Homework Statement When the filament of a light is broken why do others continue to light? Homework Equations Parallel: U=U1=U2=U3 I=I1+I2+I3+... The Attempt at a Solution Is it because there are some nodes? How can you explain this simply?

Homework Statement When two same lamps are connected with the same battery. Their lighting will be greater when they are connected in series or parallel? Homework Equations Series U=U1+U2+U3+... I=I1=I2=I3... Parallel U=U1=U2=U3... I=I1+I2+I3+... The Attempt at a Solution The answer is when...