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Each physical system has related with it a certain point whose motion characterizes the motion of the whole system. When the system goes under some external forces than this point goes as if the entire mass of the system is concentrated at this point and also the external force is operated at his point of translational motion. This point is called as the centre of mass of the system.
deriving formula of friction
Q. The gain of an amplifier without feedback is 100 and the gain of an amplifier with feedback is 200. Calculate the feedback fraction. Solution : Voltage gain after feedba
Hydrogenation reactions are facilitated by the use of a transition metal catalyst such as Ni or Pt. Predict the signs of ΔH, ΔS and ΔG when hydrogen gas is adsorbed onto the surfac
8. System is shown in the figure. Assume that cylinder remain is contact with the two wedges. Find the speed of cylinder at the given instant cylinder
State Gauss's law. The total flux of the electric field E over whichever closed surface is equal to 1/ε o times the net charge enclosed by the surface. That is φ = q / ε
An astronomer observes that a molecule in a galaxy travelling toward Earth emits light with a wavelength of 514 nm. The astronomer identifies the molecule as one that actually
Draw a picture of a moving source and the waves surrounding it according to what you observed in this experiment. How does the spacing of the wavefronts in front of the source comp
A cubical block of wood weighing 200g has a lead piece fastened underneath. Find the mass of the lead piece which will just allow the block to float in water. Exact gravity of wood
Why is heavy water used as a moderator? Heavy water is a type of water highly enriched in the hydrogen isotope deuterium. We can conclude the neutron interactions with billiard
Applications of cement mortar 1. It is used to carry out pointing and plaster works on exposed surface of masonry. 2. It is used to bind the building units like bricks, ston
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