Recent content by trustabdy

can i get some help

Homework Statement the tungsten filament of a light bulb has a resistance of .07 ohm. if the filament is 27 cm long, what is the diameter Homework Equations R= p(L/A) Area of a circular cross section = (PiD^2/4) The Attempt at a Solution R= p(L/A) A= (pL)/r...

so this W=qEd is the correct equation to find work done in joules. or are there any other equations

W = Fd = qEd q= charge on electron d= distance E= Volts/distance am i right?

is it one electron since sodium is in the first column in the periodic table

amount of energy that would be required to move an object from one place to another against various types of forces. ok

W = Fd = qEd E=Volts/distance how do i find the charge (q)

given that the electric potential is .70 V higher outside the cell than inside the cell, and that the cell memberane is .1X10^-6 thick. calculate that work that must be done (in joules) to move one sodium ion from inside the cell to outside i know V= .70V distance is .1X10^-6 i made the...

ok, found that there are 341 extra electrons which makes the total electrons to be 933. now how do u find the mass?

if they are equally split then that means the net force is zero.. which i don't think it is

anybody help please

so do i divide the excess by the charge of an electon?

[b]1. A system of 1525 particles, all of which are electrons or protons, has a net charge of -5.456 x 10^-17. a) how many electrons are in the system? b) what is the mass of the system [b]2. mass of electrons is 9.11 x 10^-31. charge of electron is 1.60 x 10^-19 [b]3. i...

never mind i got it. thanks for reminding me about the trig

okay i can't do t the trig and i have a test tommorow please show me how to do it