Ev Definition and 65 Threads

My dad and I made an EV (electric vehicle), the problem is that the batteries are not holding a charge as long as they used to. When you have your foot on the accelerator the car's the voltage drops, and when you let off of the accelerator the voltage pops right back up. the problem is that even...

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

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

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...

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...

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...

What happens to the neutron? :smile:

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...

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...

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...

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:

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.

how do u convert eV to joules again?

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

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...