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  1. chopnhack

    Particles in a Field

    In my mind there are two final velocities - the first is when the particle reaches zero velocity, when the field arrests its initial velocity. The second vf would be the field's acceleration on the proton times time. To get time we would need distance. To get distance traveled we would need to...
  2. chopnhack

    Particles in a Field

    Correct, which is what I had stated in the qualitative description in post 1.
  3. chopnhack

    Particles in a Field

    LoL - you can use what you like. I can convert (most of the times). I believe the reason he taught us this way has to do with algebraic handling of the units. Perhaps its how they were taught. In any event, no worries.
  4. chopnhack

    Particles in a Field

    So at this point we have a valid value for force: F = 9.93 x 10^-15N using F=ma and rearranging it to a= F/m getting a value for acceleration of the proton in motion is not valid? kg.m.s-2 / kg = m.s^-2 which is the unit of acceleration. What is wrong here?
  5. chopnhack

    Particles in a Field

    In a manner, yes. I was looking at the fact that nothing is faster than light, so that would mean that nothing can accelerate faster than the speed of light.
  6. chopnhack

    Particles in a Field

    But a newton is kg/ms^-2 - if we divide it by kg, do we not end up with ms^-2, which is acceleration? Vf=Vi+at
  7. chopnhack

    Particles in a Field

    F = ma rewrite to solve for a, a = F/m F = 9.93x10^-15 N mass of proton = 1.6726219 × 10-27 kilograms in dividing the two we get 5.94 x 10^12 m.s-2 as acceleration --> this is magnitudes larger than speed of light. Have I miscalculated this part?:confused:
  8. chopnhack

    Particles in a Field

    Interesting your version sounds like what I did in post #6. Is my version wrong? To answer your question, the field strength in N/C needs to be multiplied by the charge of the particle to yield the force in newtons on the particle. In this case the charge of the proton is e - 1.602x10^-19 C...
  9. chopnhack

    Particles in a Field

    That's a relief! Did I work this problem out correctly?
  10. chopnhack

    Particles in a Field

    Thanks all, I think I got it. Thank you dave - thats actually a typo. The error I made was in thinking I could divide the field by the charge - the field is force divided by coulomb and so it has to be multiplied. It still gave me pause because it yielded a subatomic particle moving faster...
  11. chopnhack

    Particles in a Field

    Hi all! I am taking a class so no spoilers please! Question: A proton moving to the right at 6.2 × 10^5 ms-1 enters a region where there is an electric field of 62k NC-1 directed to the left. Describe qualitatively the motion of the proton in this filed. What is the time taken by the proton to...
  12. chopnhack

    What terminals to use for stacked boards

    The right angle terminal blocks will allows you to access your wiring, however, you may be pressed to find one compact enough to allow 10mm spacing. Might want to use digikey to run through specs on various manufacturers.
  13. chopnhack

    Analog Circuit Outputs

    Kapp touched on an excellent point that most (if not all) μcu's have as a limitation of their ADC port. The input pin has a switched capacitor on it - thus if the input impedance is too high (i.e. - using high resistances to reduce current coming into the pin) there will be a delay in acquiring...
  14. chopnhack

    Simulating a circuit which has an ATmega328, is it a waste of time?

    Well, simulating a mcu would be very difficult indeed since you would have to simulate all of its internal registers, etc while it was running your program. As steve points out, why? The way to do this is to simply compile your code, and run it on the chip. You can then either scope it to watch...
  15. chopnhack

    Project Design Please Give Me Some Suggestion

    Sorry ward, this is an english only forum and your translation did not quite make it. can you repost your question?
  16. chopnhack

    Extraction Automation Complete!

    Well done Boyd!
  17. chopnhack

    Hello and... DC water pumps etc

    Yes, batteries in parallel increases the 'pool' of power available without changing the voltage (pressure). Batteries in series increases the voltage.
  18. chopnhack

    Can I store TV circuit boards in Ziploc bags

    Anti static plastic would be better. Why do you feel the need to put them in ziploc bags? Do you live in a humid climate? If you end up using bags, put some silica packs inside at the very least.
  19. chopnhack

    How can we Improve EP in 2017?

    Agreed, I am not aware of what is involved, I just wanted to reiterate my support for the forum and keeping content available on the forum - even when it comes to forming a chat room.
  20. chopnhack

    How can we Improve EP in 2017?

    From the first time I suggested the chat feature, I did advocate it being transcribed to a thread. See my post on page 1 & 3.
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