Recent content by evry190

Like this one http://www.iop.org/activity/education/Projects/Teaching%20Advanced%20Physics/Electricity/Images%20100/img_mid_4088.gif where v(input) comes from a battery. The thing is, in my experiment, I'm not changing the voltage from the power supply. I'm only turning the knob on the...

how do i change V(input) if it comes from a constant voltage source such as a battery sorry i don't mean to bother you, i really appreciate your help but I'm still a bit confused

i know but, isn't v(input) constant?

I have a simple series circuit with one potentiometer, and I'm supposed to find the V(output) for various V(input). However, I think that V(input) is constant isn't it, because it's the voltage of the battery...right? I know I can change the resistance and make V (output) change, but V(input)...

Hi I was just wondering why we use ice cold solvent when performing a filtration before vacuum filtration? What exactly does it do? Like ice cold alcohol? I know it allows filtration to be more efficient, but how exactly?

hey if lim (x-->0) f(x) = L where 0 < |x| < d1 implies |f(x) - L | < e how do i prove lim (x --> 0) f(ax) = L? i know 0 < |ax| < |a|d1 d2 = |a|d1 but the textbook says d2 = d1/|a| help you guyssssssssssssssssssssssssssssssss

Hi, i was just wondering, when an ester is hydrolyzed with a base, why is it called hydrolysis? Because if an ester is reacting with NaOH, and undergoes saponification then where does the water come in from the reactants side of the equation?

but in the problem the epsilon is 1

Okay so here's the limit lim(as x --> -1) 2x^2=2 I have |2x^2-2| < 1 2|x + 1||x - 1| < 1 |x + 1||x - 1| < 1/2 and 0 < |x + 1 | < delta -1 - delta < x < -1 + delta |x - 1| < -2 + delta |x + 1| < 1/2(-2 + delta) so is delta = 1/2(-2 + delta) correct...

Hi, I was just wondering. In the reaction formula I have olive oil with 3 double bonds and cyclohexene can only hydrogenate 2. How do I hydrogenate all three?

but x and y don't have to be natural numbers im a bit confused : (

well P(1) is true (x<y) and P(n) is true (x^n<y^n) and p(n+1) is true (x^n+1 < y^n+1)

0<x<y, prove x^n<y^n for n = natural numbers I know its obvious, but I don't really know what to write to proove it...