A simple numerical on momentum

Car mass is 1200 kg moving velocity is 108 km/hr. On applying brakes velocity reduced to 36 km/hr. Find change in momentum? (posted by Aditi) Answer: m=1200 kg u=108 x 5/18=30m/s v=36×5/18=10m/s Change in momentum = m(v-u) = 1200 x (30-10)=1200 ...

Can light do some mechanical work?

“We know that sound can cause some mechanical work(eg:when we keep our hand in front of a large speaker,we feel something hitting the back of our hand), but why this doesn’t happen with light??” -Manishankar asks. Link to this post!

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How atoms are formed? – Neeraj Asks

Neeraj asks: ”We have read that atoms can neither been created nor been destroyed!I want to know from where atoms came in existence,if they can not been created,also atom contain electron and proton which are negatively and positively charged,i want to know from where these charge came?”   Your question will be answered soon Link to this post!

How atoms are formed? – Neeraj Asks

Neeraj asks: ”We have read that atoms can neither been created nor been destroyed!I want to know from where atoms came in existence,if they can not been created,also atom contain electron and proton which are negatively and positively charged,i want to know from where these charge came?”   Your question will be answered soon Link to this post!

Difference between electric field and magnetic field?

What is difference between electric field and  magnetic field? Hope that the following link will help you find the answer. Difference between Electric and Magnetic fields http://in.answers.yahoo.com/question/index?qid=20080710215215AA3TS4 j http://www...

Unit 01 – ElectroStatics Class XII CBSE Question Bank

ElectroStatics (At present all the questions are posted together; soon we will be categorizing according to marks) You can either browse these questions online or download them by clicking on the link “save as pdf”. You can also send the li...