Recent content by Esas Shakeel

WOW! Very well-explained! Thanks a lot for all of this. Much appreciated :))

@Bandersnatch @Borg So by knowing how much lead is present and all the other percentage of elements in the rock, We'd add up all those years and find out?

Oh! How could i possibly not relate! So the half life of uranium-238 is 4.5 billion years. What does it change itself to? Lead? or any other radioactive element?

I just recently read about how we got to know the true age of the Earth but I am a bit confused and curious about one thing. The mineral or rock is initially going to be a uranium right? If it is, isn't all of it going to decay at the same rate? I know that a radioactive reaction is spontaneous...

@Ray Vickson Oh i get it! Yeah you're right. Natural log really confuses me even though I am well aware of the existence of these simple rules :p

But i just used the natural log power rule ln(x^y) = y ∙ ln(x) how can that be wrong? @Ray Vickson

What the heck?! I've wasted pages just to get the answer but i couldnt. I'll sue the author for this! lol . I'll take this question to my dynamics teacher and see what he comes up with. Thanks man! @Krylov

Alright sorry i didnt put the bracket. My apologies :p

@Krylov this is the solution. but I am not sure how he got to the value of t :/

Here, t represents time so if there's a easier way to find only the positive values, then i'd like to know that please :(

@Math_QED 18=0.5e^t - t -1 19 = 0.5e^t -t ln(19) = tln(0.5)-lnt ??

Homework Statement s = 0.5(e^t - t - 1) t=? when s=18 Homework Equations the use of natural log probably The Attempt at a Solution I tried using the natural log rule but I am getting stuck. Please help me out here. If someone could give a step by step solution,I'll be rreally glad, Cheers

Im so sorry i forgot to mention the value for F! Its 4kN @Ssnow @SteamKing

-25FCosα + 1.5FSinα= -80 Can someone please solve this and tell what trigonometric identities are we going to be using this solving?

Incredible response from you guys! Thanks alot! Everything makes much more sense now And @phinds haha, I don't mind, Its good to be carried away every once in a while I think :)