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Numerical Problems posted from Mechanics 26 Aug 2013 | 09:02 am
1. AN 8000 KG ENGINE PULLS A TRAIN OF 5 WAGONS,each of 2000 kg, along a horizontal track.if the engine exerts a force of 4000 N and the track offers...
The Physics of Accidents 26 Aug 2013 | 08:52 am
Why are road accident at high speeds very much worse than accidents at low speeds? Asked Muneem. Answer: As you might have studied, greater the speed, greater is the momentum....
Questions from Alternating current 22 Aug 2013 | 04:25 pm
1. Derive an expression for the average power in an ac circuit. 2. Distinguish between resistance, reactance and impedance. 3. Draw the phasor diagram...
Space and Objects 10 Aug 2013 | 04:25 pm
It seems to me that all of physicality is energy and that energy is producing objects as molecular structures. So, we can further state that all of physicality consists of...
Black Hole and Photons 9 Aug 2013 | 09:43 am
Black hole has such a strong gravitational pull that even photons can’t escape it. How is it possible if they have no mass? How can a black hole exert a gravitational force on photons if they have no ...
Learn Physics through Videos 8 Aug 2013 | 09:54 am
UNITS AND MEASUREMENT KINEMATICS ELECTROSTATICS CURRENT ELECTRICITY MAGNETIC EFFECTS OF CURRENT ELECTROMAGNETIC INDUCTION AND AC ELECTROMAGNETIC WAVES RAY OPTICS WAVE OPTICS You may also like: Learn R...
Learn Ray Optics through Videos 8 Aug 2013 | 09:31 am
These videos are very good to revise Ray optics. Try viewing them in full screen
Quantum Locking 5 Aug 2013 | 09:00 pm
I recently watched a program on quantum locking using a super conductor cooled by nitrogen. This brought to mind grapheme as a material which has superconductive properties.The next question I had was...
Drift velocity and current density 4 Aug 2013 | 06:20 pm
Current density is proportional to drift velocity, while drift velocity increases due to acceleration (a=eE/m)current remains same, how? Asked Sabha
Average velocity 2 Aug 2013 | 12:29 pm
Is average velocity equals to (initial +final velocity)/2 Asked Ishita Answer: Not always. The average velocity =(initial velocity +final velocity)/2; only if the body is undergoing uniform ac...
