Resistance Definition and 1000 Threads

The French Resistance (French: La Résistance) was a collection of French movements that fought against the Nazi German occupation of France and the collaborationist Vichy régime during the Second World War. Resistance cells were small groups of armed men and women (called the Maquis in rural areas) who, in addition to their guerrilla warfare activities, were also publishers of underground newspapers, providers of first-hand intelligence information, and maintainers of escape networks that helped Allied soldiers and airmen trapped behind enemy lines. The Resistance's men and women came from all economic levels and political leanings of French society, including émigrés, academics, students, aristocrats, conservative Roman Catholics (including priests and nuns), Protestants, Jews, Muslims, liberals, anarchists, and communists.
The French Resistance played a significant role in facilitating the Allies' rapid advance through France following the invasion of Normandy on 6 June 1944. The French Resistance provided military intelligence on the German defences known as the Atlantic Wall and on Wehrmacht deployments and orders of battle for the lesser-known invasion of Provence on 15 August. The Resistance also planned, coordinated, and executed sabotage acts on the Nazi electrical power grid, transport facilities, and telecommunications networks. The Resistance's work was politically and morally important to France both during the German occupation and decades that followed. It provided the country with an inspiring example of the patriotic fulfilment of a national imperative countering an existential threat to French nationhood. The actions of the Resistance stood in marked contrast to the collaborationism of the Vichy régime.After the Allied landings in Normandy and Provence, the paramilitary components of the Resistance were organized more formally, into a hierarchy of operational units known, collectively, as the French Forces of the Interior (FFI). Estimated at 100,000 fighters in June 1944, the FFI grew rapidly and reached approximately 400,000 by October. Although the amalgamation of the FFI was, in some cases, fraught with political difficulties, it was ultimately successful, and it allowed France to rebuild the fourth-largest army in the European theatre (1.2 million men) by VE Day in May 1945.

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  1. Cocoleia

    Resistance, cross-sectional area of long coated wire

    Homework Statement Homework EquationsThe Attempt at a Solution I attempted all of the parts: I think I did the right things for a-b-c-d, but I am pretty unsure about e & f. Can someone verify if my logic is right? Thanks.
  2. I

    Why does the current need to be small when using an ohmmeter?

    Homework Statement The question wants to know why th current should be small through a wire when using an ohmmeter. Homework Equations None The Attempt at a Solution I can't think of a solution, and looking online doesn't give any answer.
  3. U

    Which is better -- amp ground connected to frame or battery?

    There is this debate in car audio forums of this question whether it is better to connect your amp ground to the frame of the car or the battery.. basically they haven't came to a conclusion so I was curious what you guys think... Basically what I mean is that when you hook up an amp in the...
  4. M

    Engineering Need help finding total resistance in a circuit.

    Homework Statement We need to find the total resistance of this circuit but I'm not sure whether the circuit will shorten or not. (I don't even have any idea on where I should start cause it looks so different from the other ones.) Can someone also give me tips and tricks in simplifying ladder...
  5. G

    How to Factor Air Resistance into Basketball Trajectory Calculations?

    Hi all, I will be doing an experiment in which I will be rolling a basketball down an elevated ramp. After leaving the ramp, the basketball will free fall for 1.25m before reaching the ground. I was looking to come up with a theoretical trajectory for the motion of the ball, the issue is that I...
  6. Cocoleia

    RL circuits - finding resistance and inductance

    Homework Statement I am practicing questions from the book in preparation for an exam, and I am having trouble with this one Homework EquationsThe Attempt at a Solution According to my professor, the answers are: R1=12ohm, R2=9ohm, L=34.28 H So far this is what I have done: Voc = 6V τ = 20/7...
  7. T

    Voltage between two points on an empty wire

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  8. N

    Effect of resistance on voltage flow in a wire

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  9. L

    Resistance proportional with velocity problem

    Homework Statement If we have object with mass 10 kg traveling at starting velocity of 50 km/s and one force of resistance that is equal to v^2 of object's velocity how can we calculate distance and time in which that object travels until it gets to velocity of 10 km/s.Homework EquationsThe...
  10. W

    Current through a conductor with varying cross-sectional area

    Homework Statement Homework Equations I = nqVA J = E/ρ J = I/A The Attempt at a Solution The underlying assumption was that current was constant across all 3 bits of the conductor, and thus answer is b. The concept I can't grasp is this: Why is current constant? Shouldn't a smaller A mean...
  11. fuvest

    Electrical Circuit Problem / Electric Potential Difference

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  12. G

    Finding resistance of single resistor

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  13. doktorwho

    Engineering Total power of resistors in a circuit

    Homework Statement In this problem we are asked to calculate the total power of the resistors in the circuit below. Homework Equations ##P=I^2R## The Attempt at a Solution My solution goes like this: PT=PR1+PR2+PR3+PR4+PR5 I can find PR1 and PR5 immediately from the given current...
  14. Shelby8

    Current and resistance of wire heating up water

    Homework Statement An office worker uses an immersion heater to warm 250 g of water in a light, covered, insulated cup from 20 degrees C to 100 degrees C in 4 minutes. The heater is Nichrome resistance wire connected to 120V power supply. Assume wire is at 100 degree C during 4 minute time...
  15. M

    Finding Resistance in RC Circuit

    Homework Statement In a simple RC circuit the current as a function of time behaves in the following manner: I(5s) = 8.823 I(10s) = 7.788 I(20) = 6.065 I(30) = 4.724 I(40) = 3.679 I(50) = 2.865 I(60) = 2.231 I(70) = 1.738 I(80) = 1.353 I(90) = 1.054 I(100) = 0.821 I(110) = 0.639 Assuming...
  16. B

    How much less wind resistance will a round skyscraper have?

    For a school project, I need to know how much less wind resistance a round skyscraper will have compared to a standard rectangular one. You can assume the skyscraper will simply be a generic elliptical shape, somewhat similar to an egg. Answer doesn't have to be extremely specific, I just need...
  17. A

    Projectile Motion problem involving air resistance

    Homework Statement Ok, so I am attempting to solve a projectile motion problem involving air resistance that requires me to find the total x-distance the projectile traverses before landing again. Given: \\ m=0.7\text{kg} \\ k=0.01 \frac{\text{kg}}{\text{m}} \\ \theta=30 \degree Homework...
  18. H

    Need help understanding potential difference practically

    I have a problem understanding the concept of potential difference. I get the picture of seeing it as a height difference for example (rock or water that would fall down) but what confuses me is that many times the order of elements in a circuit does not matter. To explain myself better: if I...
  19. doktorwho

    How to find the equivalent Thevenin's resistance?

    Homework Statement Find the Thevenin's equivalent with respect to points A and B Homework Equations 3. The Attempt at a Solution [/B] The resistance i found to be ##R_t=(R_2+R_1)||R_3+R_4## and that is the correct expression but for the voltage source the book gives...
  20. D

    Engineering What Voltage Should Be Applied to Achieve a Change in Capacitor Energy of 4uJ?

    Homework Statement This is the second problem from our test preparation cycle and i partially solved and understood it. The circuit in the picture is in the state of switch being open (STATE 1: SWITCH OPEN). Calculate ##E1## so that the change in the electrical energy of the capacitor is...
  21. D

    Engineering Understanding thevenin's circuit in linear circuits

    Homework Statement This is one of the problem i had had some help in solving but some things remain unclear to me and i will highlight them by posting the exact question in the brackets next to the line of solution so that you can see what bothers me. Hopefully you can help me better understand...
  22. M

    Finding the effect of air resistance on period of oscilation

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  23. A

    What is the velocity of a falling object with air resistance?

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  24. H

    Why would a parallel circuit (or in blood) decrease resistance

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  25. A

    Thevenin resistance in an opamp RC circuit

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  26. A

    What is the Thevenin and Norton equivalent for the given circuit in Fig. 4.125?

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  27. D

    Engineering Find the current in the circuit

    Homework Statement (##R_5=8\Omega##) a) Calculate the current ##I_{g2}## so that the power of the generator ##I_{g1}## equals ##P_{ig1}=6.25W## b) What is ##I## then? Homework Equations 3. The Attempt at a Solution [/B]...
  28. H

    A How is the von Klitzing constant used to measure resistance?

    How is the constant used to measure resistance? I can't find a clear answer anywhere. The constant is h/e^2 but that doesn't really help in seeing how it is linked to resistance other than the units being the same in base units.
  29. hackhard

    Resistance from fingertip to Earth wire

    i connected one probe of digital mutimeter to the Earth terminal of domestic ac supply and held the other probe. it showed resistance of 1.8Mohm . but when i touched that end (one i'd held) to the floor. it displays 1( beyond 200Mohm ). why so ? shouldn't resistance be lesser?doesnt any current...
  30. R

    Calculating Resistance in a Circuit with Unknown Components

    Homework Statement I understand part a, but not part B. Homework EquationsThe Attempt at a Solution For part b) the PD across the resistor is 2V, but we don't know the current so we can't calculate using ohm's law eqn. And because the new resistor's resistance is unkown, how do we actually...
  31. J

    Calculating the missing resistance when only given voltage

    Homework Statement I am asked to calculate the missing resistance(R5) when only given the voltage drop of of 14v across it Homework Equations current and divider rule ohms law The Attempt at a Solution [/B] i tried finding the current of the 6+10 ohm series resistor that is parallel to R5...
  32. Dinie

    Resistance of rice cooker's heating element?

    hi everyone, i need some help with my project that is DC rice cooker. i have the same problem for my calculation and logic cause my rice cooker use 12V and 100Watt. is that mean i need to use 8.3333Amp for the current? or i need to design a circuit that can reduce the amount of current needed...
  33. P

    Solar Cell Current increases as Resistance increases Problem

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  34. ernd59

    Insulation Resistance and tangent delta in a X Capacitor

    Hallo, I have a question which elements are responsible for the increase of tangent delta in a X Capacitor and the reduction of its insulation resistance?
  35. hackhard

    Graphite Touch Button: High Conductivity & Faster Response

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  36. O

    Can a 50' Semi Trailer Frame Be Heated to 400°F Using Electrical Resistance?

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  37. F

    Resistance and Inertia: How Foundation Size Affects Seismic Movement

    If an object is heavier.. it has more resistance to inertia.. during seismic movement.. when the ground shakes or accelerates.. does it mean bigger foundation would be more resistant and move less.. and smaller foundation can move more?
  38. G

    Resistance: Dissipated power in collision model

    Hi. A simple model explains resistance in metals with collisions of the electrons with the stationary atomic cores. So I assume more collisions result in a higher resistance? But for the dissipated power we have ##P=U^2/R## , which is large for small resistance. I have difficulties combining...
  39. L

    Pendulum in vacuum vs with air resistance

    If a pendulum consisting of a string and a bob is allowed to swing in a vacuum vs in air, which has larger period?
  40. I

    What is the resistance between two resistors?

    Homework Statement Homework Equations R=V/I The Attempt at a Solution Would it be 10ohms? Since PQ is between two 10ohms resistor.
  41. W

    Non-Inverting Opamp with Voltage Source resistance

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  42. A

    How to make total resistance of 1 ohm?

    Homework Statement We have 1Ω, 2Ω, 2Ω, 4Ω, 5Ω and 6Ω resistors. We have to make a circuit with all of them and total resistance must be 1 ohm. Homework Equations Parallel: 1/R1+1/R2=1/R In series: R1+R2=R The Attempt at a Solution I have only made a circuit from 4 resistors: 1 ohm and 2 ohms...
  43. Dilemma

    Equilavent Resistance of a Triangular Circuit

    Hello, Circuit: 1. Homework Statement Determine the net resistance between points a and c and a and b. Assume R' ≠ R. Homework Equations ε - IR = 0 V = IR The Attempt at a Solution http://i.imgur.com/Y2KPI20.jpg I applied an emf between the points a and c, and tried to solve using...
  44. G

    Does net charge affect resistance?

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  45. Kara386

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    I'm not entirely clear what shunt resistance is, it's fairly hard to find things on google which refer to it in the context of LEDs. So we did an experiment in which we measured the IV characteristics of InAs at different temperatures, and observed the gradients of these graphs (apparently those...
  46. A

    B Resistance of Space-Time fabric

    According to relativity gravity is just an illusion caused by wrapping of space-time fabric by mass, right? So, what is the elasticity of of space-time? There must be some king of resistance for the wrapping, otherwise even a tiny mass would plunge in the space time for eternity.
  47. M

    Lab: Plot graph of resistance, R (in Ohms) versus 1/d^2

    Homework Statement We were given five samples of nichrome wire, each with a different diameter but the same length. A micrometer was used to measure the diameters. We then measured and recorded the electrical resistance, R in Ohms of each nichrome sample with a DMM. I will try to summarize all...
  48. M

    Total resistance in a circuit question

    Homework Statement Assuming the wires have negligible resistance, find the equivalent resistance between the terminals A and B. Answer to 2 significant figures. Homework Equations [/B] 1/R = 1/R1 + 1/R2 ... + 1/Rn R = R1 + R2 + RnThe Attempt at a Solution [/B] I have drawn a more...
  49. P

    Thermistors calculation of base resistance

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  50. D

    Beginner Question About Series Parallel

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