Since 0 = 81t^2 - 16t^-2
Let y = t^-2
Therefore 0 = 81y^-1 - 16y
= 81 - 16y^2
= (9 - 4y)(9+4y)
So, y = 9/4 and y = -9/4
But y = t^-2, so 9/4 = t^-2
9t^2 = 4
t = +/- 2/3, -2/3 can be ignored assuming we...
Sorry,
What I am trying to do is find out how the electric potential of a radial field equation is derived. I have found a derivation by using Coulomb's Law and the equations for electric force, work etc however I do not understand the equation completely. This is because I do not know if the...
I am wondering if there is some way for the force between two charges (calculated by Coloumb's law) and the force applied by a field on a charge.
Thanks in advance
Sum of a GP = a(1-r^n)/(1-r) where a is the first number in the sequence, r is the common ratio and n is the term number.
When -1<r<1 and n approaches infinity r^n approaches 0. Therefore Sum to infinity = a/(1-r)
Therefore Sum to infinity = 4/(1-0.5) = 8
I am currently studying thermochemistry and specific heat capacity has been discussed. From observing a list in order of specific heat from highest to lowest and then comparing to a list of densities, it seems to me that the denser a substance is, the lower the specific heat. Is this true and if...
I would imagine that a(0) is the principle as it is the sum of the principle and the interest at t=0. Since there is no interest at t=0 the sum of the principle and the interest would be the principle.
I would be grateful if someone could tell me how to find unknown indices.
e.g 3^x=9
(i know it is 2 but i would like to know the process for use with larger numbers).
Thankyou in advance