Recent content by johncena

If sound travels faster in solids than in air then why on closing our ears we cannot hear the sound properly?

What is the scope of btech in PHYSICAL SCIENCES from IIST(indian institute of space science and technology)? after that course it is compulsory to work in ISRO for 5 years...(if you get first class) will that be enough to get into NASA?

Ohhhh...i missed that point... thanks sir...you was very helpful...

divide numerator and denominator by x..

Sir, i can't get you ... can you explain a bit more? you mean that no more viruses reproduce after 5 seconds?

Homework Statement A virus give birth to 2 new virus in each second and life span of each virus is 5 seconds.The process of reproduction is continuous until the death of the virus.Initially there is one newly born virus at time t=0.Find the total number of live viruses just after 10 seconds...

thank you sir... i am getting it now...:smile:

Homework Statement A galvanic cell consisting of two silver electrodes,one in a saturated solution of AgBr and the other in a saturated solution of Ag2CrO4 is prepared.Calculate the value of Ecell at 298K Given Ksp(AgBr) = 5x10-13 M2 and Ksp(Ag2CrO4)=2.4x10-12M3 Homework Equations to...

What is the function of salt bridge in a daniell cell?Why KNO3 is used in salt bridge ?

The number of sides of two regular polygons are in the ratio 5:4 and the difference between their interior angles is 6 degrees.Find the number of sides of the two polygons. I forgot the relation between interior angles and the number of sides of a regular polygon.Can anyone help me to figure...

In my textbook, the proof for demorgan's law, (AintersectionB)* = A*unionB* [*=complement] starts with,saying that for all x belongs to (AintersectionB)* , x is not a member of AunionB. But how can we say that, for example, if A = {1,2,3} and B = (2,3,4,5} and U = {1,2,3,4,5}...

why does that happen or how does that happen ?

"When we touch a pith ball with an electrified plastic rod, some of the negative charges on the rod are transferred to the pith ball and it also gets charged." I want to know how does this happen ?

"The charge of an isolated system is conserved" What is the meaning of isolated system ?

When we heat a metal, the positive kernels begins to vibrate.Will this vibrations produce electromagnetic waves ?