physics notes for class 11

1 Au = 1.496 x 10 1 1 m 1 ly = 9.46 x 10 1 5 m 1 parsec = 3.0857 x 10 1 6 m 1 F = 10 - 1 5 m 1 micron or 1 m m = 10 - 6 ..

Take half kg of water in a vessel. Note its temperature Heat it for exactly 2 minutes using a Bunsen burner. Again note down its temperatur..

, called the moment of inertial of the body about the axis of rotation. Let us note the similarity between 'm' is the mass of the body and does not depend on the choice of the origin or the axes of rotation or the kind of motion. But, the moment of inertia depends on the choice of axis. Ho..

Note: R = R m a x i m u m , wh..

Note that if r < s , the body moves up with constant velocity. For example, gas bubbles rise up through soda water bottl..

The situation here is almost the same as the situation in the figure, just that the body here is sliding up instead of down, the friction acts downward. Component perpendicular to the surface Component parallel to the surface (Note that the body is being pulled with a constant velocit..

Zero vector or null vector is a vector which has zero magnitude and an arbitrary direction. It is represented by . If a vector is multiplied by zero, the result is a zero vector. It is important to note that we cannot take the above result to be a number, the result has to be a vector and..

> of the fundamental note is called the 'first harmonic'. Figure (b) shows the first overtone in a closed pipe. Two nodes and two antinodes are formed. The wavelength and the frequency of the sound corresponding to this mode of vibration will be different from those corresponding to the f..

Rolling Friction - Most of us have used cycles and some of us still do. You must have noticed that well filled tyres make cycling a whole lot easier than the tyres that are not completely filled with air. This is due to rolling friction between the tyres and the road. When a body rolls over another..

An isochoric process is a constant-volume process. When the volume of a thermodynamic system is constant, it does zero work on the surroundings. Then W = 0, and In an isochoric process, all the energy added as heat remains in the system as an increase in internal energy. Heating a gas in a closed c..