# Recent content by pcm

1. ### Central limit theorem and estimates of probability

It's not 1/2. Check your calculation.
2. ### Central limit theorem and estimates of probability

As Simon said you are using p for two different things. You can use the fact that p(1-p) (where 0<p<1) has a maximum value(find it). You can use it to get a bound for your answer.
3. ### Friction and Pulleys

Write the newton's laws in the frame of the ground. It is an inertial frame. Write down all the forces(along both axes). Also observe that for every meter the car moves, block A moves by 2 meter.
4. ### Finding maximum value

yes,x=y is only possible. By graphing all lines and checking possible values for x, i get x between -20 and 20. And maximum is indeed for x=-20.

(10,10)
6. ### Finding maximum value

That is not going to work.What you say is maximum is true only for a=b,if you apply AM GM inequality on a,b.Doing so for 1st 2 expressions give x=140,y=260. *I don't know the answer*
7. ### So You Want To Be A Physicist Discussion

Nice essay.Really an eyeopener. Thanks ZapperZ.
8. ### Chemistry Equilibria Help

no you dont have to include no.of moles of solid. no, it would go backwards,as Qp>Kp. for (iii) and (iv) read le chatelier's principle. http://www.chemguide.co.uk/physical/equilibria/lechatelier.html#top
9. ### Proof square root bijective;

to prove square root function to be bijective you need to specify the domain and codomain of the function. if codomain is set of real numbers, then its not bijective.
10. ### Chemical Kinetics - Activation Energy and gr

the integrated rate law for 0th,1st,2nd order might help for problem 13. for q.14 use first two data to find the rate law and rate constant. then using arrhenious equation and the third data find rate constant at 650K. use the integrated form of rate law to find the required time.
11. ### A question on impulsive tensions

i get 0.782 if i take g=9.8 m/s^2.
12. ### Multiloop circuit Diagram

if you need equivalent resistance, then it can be reduced to series/parallel combination by first using delta star transformation.

cartesian

batesian

x ray