Recent content by lee_chongeu

There is nothing wrong wat?

Lets assume we have a resistor material, with a perfect solid spherical shape and no defect, we connect it from south pole to north pole, by using the general formula of R=(rho)L/A where rho is the resistivity and L is the length of the resistor, and A is the cross sectional area. I found that i...

Request for full solution Can you show me the full solution of this question? Thanks :-)

Lets have the example. Let consider for 10 doors and 10 persons. That is the list. Now can you understand my question? Making a list isn't easy, but there is mathematical solution to this answer. The number for the closed door is 3. That is sqrt(10)=3.162=approx=3. Why?

There is 1000 doors (label 1,2,3...,999,1000) and 1000 peoples. First person close all doors, 2nd people open doors with label multiple of 2, 3rd person open doors with label multiple of 3 and so on. If the doors is open, he will close it. After 1000 people do that, how many doors are CLOSED? I...