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Q. If an object isn't moving, no external force acts on it. No it is always not true, there would be balanced forces which cancel each other out leaving no net force. Example:
Q. What is ionisation potential energy? For hydrogen atom the energy necessary to remove an electron from first orbit to its outermost orbit (n=∞) is 13.6-0 = 13.6eV. This ene
What type of waves are electromagnetic waves? Feedback: Electromagnetic waves are transverse waves that the oscillations of the electric and magnetic fields are at right
How does a manometer measure gas pressur?e
At the neutral position, magnetic field because of the bar magnet is just equal and opposite to the horizontal component of earth's magnetic field.
Will we always see a difference in brightness along an optic? Not essentially so. The human imagine system appreciates illuminance grades into a logarithmic fashion and when th
examples of like and unlike forces for class 9
A 250 N crate is sitting on a 30 degree inclined plane. The frictional force is larger than the component of the crate's weight parallel to the inclined plane, so that the crate do
A single movable pulley Suspend two pulleys on a cord from a horizontal support, and load them as shown. If there is no adjustable support on the expression desk, a window stic
Explain the applications of polarization of light? Write any four applications of interference of light. Illustrate how plane polarized light obtained by reflection.
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