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# Tag Archives: Draft

## EXCEEDING COSMIC LIMIT

ADITYA KIRAN asks:

“i’ve a beautiful doubt…normally we believe that nothing in dis world can cross cosmic limit…now suppose if 2 light particles(velocity=c) collide at right angles,,then their resultant will be [c*root2]…but that is greater than cosmic limit,right?????”

LET THE VISITORS RESPOND

## A Few Questions from Previous Board Papers and Answers Posted by Bright students

(A request to all students who have finished revising Physics; Now it’s time to practice Previous Question papers and sample papers. Practice to finish the questions within the stipulated time and with perfection)

Solved paper

## Sequence of Learning Physics

In what sequence should these chapters be prepared for my exams:-
units and dimensions,kinematics,laws of motion,work power and energy,motion of system of particles and rigid body dynamics,gravitation.

Apoorv Katoch asked

Answer:

It is better to follow the same pattern as given in NCERT text book

## Physics in Irrigation

Somnath asked:

“water in a canal 6m wide n1.5m deep is flowing with a speed of 10km/hr.How much area will it irrigate in 30min if 8cm of standing water is need”

Answer (to be posted soon)

## 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.

## A Problem from Motion

Sandeepan Asked:

“Q. Velocity of a moving particle is given by v = t2 – 4. Find out:-
(i) Time at which velocity is zero.
(ii) Acceleration at which t= 1s
(iii) What type of motion uniform or non-uniform.”

Ans:

In the equation, put v=0 to find the time at which velocity equals zero

Differentiate the equation and then put t=1 to find acceleration at t=1s since a = dv/dt

The motion is non uniform as its velocity varies with time.

## Quantum Entanglement Links

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• Post Edited: Work done and Kinetic/Potential Energy https://t.co/53bHeenlkr
about 2 days ago