Logic between Cell and knife sharpness

My question is
                   We can cut things with the help of knife but we cannot cut things with help of cell phone why?
   My answer
                  There is no secret behind this the matter is only the pressure of contact.Think like science student we not cutting things just we are seperating the bonds in that thing.A thing is made of group of atoms bonded in it if we seperate the bond between atoms so we can simply seperate the thing.So with knife we are cutting things because it can seperate the two things with its sharp edge.With the cell phone we cannot cut the things because it is easy to seperate the bonds with breaking the contact between them.pressure of contact should be equal to the pressure on the thing or object

Current affairs

Indian railway minister: pavan kumar
Prime minister of India: Dr. Manmohan singh
Cheif minister of Andhra pradesh: Kiran kumar Reddy
President of India: Pranab mukherjee 

Theory of Relativity

Do you know what is relativity?
There is nothing bad and good in the universe until and unless we compare with something else.
this theory is actually derived by albert einstein.
there are two theory of relativities
1.special theory of relativity
2.general theory of relativity

time is no universal
this is what special theory of relativity says
space is also not universal
this is what general theory of relativity says

Guys,
       this is not only the theory but also the work of imagination how much you imagine that much you understand.