Recent content by abot

in the attachment there is a problem related to techniques of integration, i fully understand everything until near the end of the problem they answer says (1/6)o - (1/12)sin2o + C = (1/6)o - (1/6)sino coso + C and then they convert the sinocoso to sec-1 this part is really...

techniques of inegration, please help in the attachment there is a problem related to techniques of integration, i fully understand everything until near the end of the problem they answer says (1/6)o - (1/12)sin2o + C = (1/6)o - (1/6)sino coso + C and then they convert the sinocoso to...

the problem reads... the magnetic field inside a superconducting solenoid is 4.50T. the solenoid has an inner diammeter of 6.20cm and length 26.0cm. Determine (a) the magnetic energy density in the field. (b) he enrgy stored in the magnetic field with in the solenoid. For (a) i use the...

thats all i have. the parent equation was .0251A=.0157sqrtB^2 + A^2

HI, i can't solve this equation. I am solving for B the answer in the book does not match mine. PLZ help. (1.5999A)^2= B^2 + A^2 the answer in the book is 1.247

I do not know what to solve for...? One recargable battery of mass 15g delivers to a cd player an average current of 1.80mA at 1.60 V for 2.4hours before the battery needs to be recharged. The recharger maintains a potential difference of 2.30v across the battery and delivers a charging...

the problem reads th quantity of charge q that has passed through a surface area of 2.00cm^2 varies with time accoding to the equation q=4t^3+5t=6 where t is in seconds. what is the instantenaus current through the surface at t=1s? What I did was plug in 1 in the equation and got 15 as an...

Andrew Mason, above you say what capacitance is defined as and also tell me coulombs law. after i solve for c, capacitance i get C= (ab)/(k(a-b)) where a and b are the radius then when i plug the numbers in, i don't get the right answer. the book gets 13.3pF. what am i doing wrong? THANKS

Hi, i appreciate your help. The problem reads an isolated charged conducting sphere with radius 12cm creates an electrical fiels of 4.90^4 21cm away from the center. find the capacitance and charge density? I used the formula C= (a*b)/(Ke*(b-a)) but i get the wrong answer what am i...

what? well if you find the F that way then... F=ma (1st i need acceleration...(2.20m/s / 12sec)= .183m/s^2 F=950kg*.183m/s^2 F=174N So then... P=FV P=174sin30*2.2 P=191W but the answer is P=10600W

ohhhh man! does anyone have any idea? haha if its asking for the maximum power what would change. the mass is the same so is g the velocity I am not sure about but what would it change to?? the sin I am certain would stay the same aswell. I don't really understand the difference between part...

I messed up on the last line... i meant i don't know how to do (b) but i think its like (a) can anyone shed some light

A loaded ore car has a mass of 950kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 30 degrees above the horizontal. the car accelerates uniformly to a speed of 2.2m/s in 12 sec and...

alright... got it...thanks

yes i understand why you would use such equation but how would you get velecity from it