Recent content by Wen

1.What will be produced when Cu(II)SO4 is mixed with sodium carbonate 2.What will be produced when Cu(II)SO4 is reacted with sodium carbonate and sodium hygrogencarbonate? What causes the difference between 1 &2? Is the product for Qn2 CuCO3.Cu(OH)2aq?

Sorry i wasn't specific, what i was asking was that an oscillating system, undergoing forced oscillation by an external periodic force and damping increased. So why did the resonant freq of the enternal force decreases( as seen a shift to the left in the graph)? Someone mentioned that resonance...

I'm sorry but Is it so simple? So the phase difference doesn't matter? Why is it known as a mechanical RESPONSE?

In an Oscillating system,as damping increases, the amplitude of the system at the resonance frequency decrease and the resonance frequency also decreased. However why does the reasonce freq decrease? I know how to solve for the new amplitude and ang. freq. mathematically but i do not know how to...

During constructive interfence of 2 equal amplitude wave, the amplitude of resultant wave doubles, hence the intensity increased by four times. Does this violates the Principle of conservation of energy? Also what happen during destructive interfence, where has the energy lost? Please...

the friction and its weight because the aceleration of both the rod and ant is 0

Qn A uniform Solid Sphere, placed on top of a spherical dome, rolls down the dome with negligible initial velocity. The sphere sphere start to skid(sliding at the point of contact )when the angle( angle btw the line joining the centre of the dome to the centre of the sphere and the verticle)...

yes to both .

A hoop pf radius r and mass m is rolling without slipping with velocity v towards a step of height h on a horizontal surface. Assume that it does not rebound and no slipping occur at the point of contact when the hoop roll up, what is the minimum velocity needed for the hoop to roll up...

a thin rod is fixed on one end and rotate in a vertical motion. Its period of oscillation is pi s . It is now held in the horizontal position and let go. An ant happen to cling into the rod at distance 1 m from the pivot. Find the contact forcce the rod exert on the ants when it swing to the...

I've got 2 qns 1) Student holding a tuning fork vibrating at 440Hz walk away from a wall with a speed of 1.2m/s. What's the freq of the echo the student can hear from the wall? Speed of sound is 330m/s Can i just use Freq= [(330-1.2)/(330+1.2)] (440Hz) to solve 2) A car traveling at 10m/s...

I was asked to give the eqn and proof of energy of sinosiodal waves. However, I only know the enq of sinosiodal waves on string and to prove it. Energy= 1/2 (mass per unit length).(ang. freq.)^2.(amplitude)^2.wavelength So what is the eqn of energy of general wave. It is should be almost...

i know that Work done by the gas is nRTIn( Vf/Vi) and this is only for the two isothermal processes Since BC and DA are isobaric, the 2 isothermal processes are AB and CD. The nett work done is the shaded area in the diagram. But i do not know the volume of the gas at B & D.

An ideal gas is carried through a thermodynamic cycle consisting of 2 isobaric and 2 isothermal processes. Show that the nett work done is W=P1( V2-V1)ln ( P2/P1) i am really stuck at this qn for very long. Please help me

no it was correct.2 is outside of the sq. rt. But the angular a is not constant, so i thought a integration must be carried out? I was using the parallel axis theorem: 1/2MR^2 + mR^2