Kamal Dhungel | Reputations

The first law of thermodynamics whimsically states ,"you cant get...." This implies that unless you supply heat to a system you can not get work done.This is conservation of energy i.e first law. The second...

This does not violate second law of thermodynamics.Growing body produces protein which is a complex molecule.The food molecules breaks down to release energy , during this process entropy increases .A...

During an ideal isothermic process temperature remains constant .As a result the internal work done ,which is merely a function of temperature,remains zero.It implies dQ=dW=3700J.This is complete information...

No it doesnt violate the Second law of thermodynamics. While arranging the papers its entropy decrease , but along with this our body loses energy and entropy increases.The increase in entropy of body...

Basically a choke coil is a pure inductor which provides inductive reactance without providing resistance.The phase angle through inductor is 90 degrees so, wattless current flows through it. In a nutshell,...

It is quite easy to identify them. 1.Conductor are the materials having no forbidden gap 2.Semiconductor are the materials having narrow forbidden gap. 3.Insulator are the material having wide forbidden...

It is because the work function of alkali metals are quite low compared to others.Therefore they eject photoelectrons with light of low frequency (even with visible light).

The charge of u quark is 2/3e and d quark is -1/3e. Now uud =2/3e+2/3e-1/3e =+e , it is proton similarly udd =2/3e-1/3e-1/3e =0 , it is neutron

The reciprocal of Hubble's constant estimates the age of the universe.

Both positron and proton has positive charge however they are entirely different particles. Positron is an antiparticle of electron and its mass is equal to mass if electron .On the other hand proton is...

The focal length of curved mirror is given by the formula : f=R/2.This focal length is free from refractive index of the medium. Joining these facts it can be said that focal length of curved mirror doesn't...

Solid support both transverse and longitudinal waves however,fluid support only longitudinal wave.Because, transverse wave travels in the medium having modulus of rigidity whereas longitudibal wave travels...

Yes the focal length of lense changes if it is immersed in water.This can be explained with the help of Lensmakers formula. According to this formula the focal length of lens depends on refractive index...

Though the electrons are not visible with naked eyes , we have multifarious evidences that electrons exists .For eg i.Cathode ray tube. ii.Photoelectric effect iii.Thermoelectric effect iv.Flow of electric...