JEE NEET By AIR 89™

2021-06-13 10:44:44 3. In gravity-free space, a particle is in contact with the inner surface of a hollow vertical cylinder and moves in a horizontal circular path along the surface. There is some friction between
the particle and the surface. The retardation of the particle is
(a) zero
(b) independent of its velocity
(c) proportional to its velocity
(d) proportional to the square of its velocity Open / Comment

2021-06-13 10:44:35 2. In the previous question, if the particle is released from rest at its
highest position then the tension in the rod
(a) is zero when it is vertical
(b) is zero when it is horizontal
(c) is zero when it is making an angle of cos ^-1
(2/3) with the
vertical
(d) cannot be zero in any position Open / Comment

2021-06-13 10:44:24 1. A particle of mass m is tied to a light string and rotated with a speed v along a circular path of radius r. If T = tension in the string and mg = gravitational force on the particle then the actual forces acting on the particle are
(a) mg and T only
(b) mg, T and an additional force of mv^2/r directed inwards
(c) mg, T and an additional force of mv^2/r directed outwards
(d) only a force mv^2/r directed outwards Open / Comment

2021-06-13 09:09:41 Vedantu Questions Of Some Chapters

#part2

Biomolecules -
https://drive.google.com/file/d/1G3m4cbAstb6kEf0clNGadiPafy8RxmI2/view?usp=sharing

Neural Control And Coordination -
https://drive.google.com/file/d/1WUD9Xp-qFZnxJfa-7kAv7wbd9B3kvd88/view?usp=sharing

Molecular Basis Of Inheritance -
https://drive.google.com/file/d/1i5P1V8XSn_6NYZXR8QX4Ai4qAJ5i0PYy/view?usp=sharing

P Block Group 13 & 14 -
https://drive.google.com/file/d/1dPxXj4YiLHfKKXxYof9IHIzGuu134HsO/view?usp=sharing

Reproduction In Organisms -
https://drive.google.com/file/d/1dl0S0wXYtc2dAqrNDXI23VvVqsg7LIAo/view?usp=sharing Open / Comment

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#Emerge #5_crore Open / Comment

2021-06-12 20:02:44 Postulates of kinetic theory of gases

A gas consists of large number of tiny particles called molecules.
Volume occupied by gas molecules, is negligible as compared to the total volume of gas.

There is continuous rapid random motion of gas molecules. The molecules collide with each other and against walls of container.

The molecules are perfectly elastic bodies and there is no loss of kinetic energy during collisions.

There are no attractive forces between the molecules of gas.

The pressure exerted by a gas is due to bombardment of gas molecules against the walls of the container.

The different molecules possess different velocities and hence different energies. The average K.E. is directly proportional to absolute temperature. Open / Comment

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#Emerge #5_crore Open / Comment

2021-06-12 15:59:43 Important announcement by alakh sir -

Join official @physics_wallah_quiz for regular updates

https://pw2.pc.cdn.bitgravity.com/292da48b-6985-4ae7-904b-a8bd47591a10/master.m3u8 Open / Comment