What is Ev: Definition and 64 Discussions

GreenWheel EV (Chinese: 陆地方舟)， full name Shenzhen Greenwheel Electric Vehicle Group Co.,Ltd （深圳市陆地方舟新能源电动车集团有限公司）is a Chinese automobile manufacturer headquartered in Guangdong, China, that specializes in developing electric buses and low-speed electric vehicle or Neighborhood Electric Vehicles.

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  1. F

    Why is work function almost always in the range 4-6 eV?

    This is the case with metals semiconductors polymers and ceramics I have checked on the web. Still looking for exceptions...
  2. C

    Conversion from cm^{-1} to eV - Ask Here!

    Hi to everybody; I wanted to ask: which is the factor of conversion from cm^{-1} to eV? Thank you!
  3. D

    What is the torque required to push an EV?

    Hi, A normal query regarding moviement of the wheel of an EV. In the designing of an EV, I calculated the torque required to pull the wheel of my EV on normal surface as T=F*r (keeping in mind friction and other factors too),where 'r' is the radius of the wheel. Similarly, I calculate the...
  4. D

    Selection of DC motors for EV and controlling them

    Hi, I am designing a small EV and I am looking forward to some guidlines regarding designing of H-bridge (torque) controller for controlling somewhat in between 6-8 permanent magnet brush DC motors , the overall power required from these motors is between 70 to 250 W, where 70 W is for...
  5. D

    Solving V and eV Questions: Work Function & Threshold Frequency

    Homework Statement Light of the wavelength Lambda = 5893 Angstrom is incident on a surface. The stopping potential for the emitted electrons is 0.36 volt. Calc the max energy of the photoelectron, the work function and threshold frequency. my question is about the stopping potential...
  6. C

    An UHECR neutron (kinetic energy 10^19 eV) approaches a magnetar (B = 10^10 T)

    What happens to the neutron? :smile:
  7. R

    What is the maximum speed of an EV with given HP and resistance?

    Problem is to solve for max speed of an electric vehicle, given is the HP of motor (3 total), and the wind+rolling resistance of the vehicle at 60mph. Wind resistance should be regarded as a constant for this problem. Also given is EV weight with cargo and rider Motor HP = 5, 10 , 20...
  8. ZapperZ

    What Is the Quantum Efficiency of Molybdenum and Tellurium for 5 eV Photons?

    Hi Everyone, I need a big favor for those of you willing to do a bit of hunting. I have a rather old paper that cites the quantum efficiency (or quantum yield) of Molybdenum and Tellurium for 250 nm photons. I also have experimental values for those two. They just don't make any sense to...
  9. R

    At what eV will electrons induce Be-10 decay?

    Nuclear-powered spaceflight is the obvious choice for this century, but the few safe-choice fuels have little experimental documentation ... Be-10 might be the best at 556KeV and half-life of 1.51Myr ... β-chaining if possible ... At what eV will accelerated electrons induce Be-10 nuclei...
  10. A

    If I have Volts, and I need eV, how do I get that?

    If I have Volts, and I need eV, how do I get that? Is eV (energy format) = V (voltage format), so that if I have a value given in volts, I know that it would be the same in eV units? I know this is a dumb question, sorry guys...:blushing:
  11. H

    Locating Li (2+) Energy Levels - eV

    Where can I find the different energy levels (in eV) for Li (2+). I can't seem to find it in my textbook or on the internet.
  12. N

    How do u convert eV to joules again?

    how do u convert eV to joules again?
  13. M

    Work Function of Silver: Solve Problem 18 for eV

    Problem 18. The threshold frequency of silver is 14.3*10^15Hz. What is the work function of silver? Answer in eV.
  14. G

    How Do You Convert Momentum from MeV/c to kg-m/s?

    I'm having a hard time getting used to expressing quantities in electron-volt equivalent units. Masses and energies expressed as MeV/c2 are confusing, but manageable. But I seem to have a complete mental block over momentum as MeV/c. It's easy enough to look at a table & see that 1 MeV/c...
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