What is the need for smoke particles inside the bottle for this experiment?

What is the need to make a herbarium?

What is the need for doing modulation ?

What is the need of a hepatic portal system?

When is the pressure inside the bottle higher?

What is the need for classification of elements ?

Source of alpha -particles used in scattering experiment was

Answer the following questions based on Hershey and Chase.s experiments: What was the need for using a blender and later a centrifuge during their experiments ?

Two stationary particles of masses M_(1) and M_(2) are 'd' distance apart. A third particle lying on the line joining the particles, experiences no resultant gravitational force. What is the distance of this particle from M_(1) ?

A particle of mass m oscillates inside a smooth spherical shell of radius R and starts its motion from point B . At given instant the kinetic energy of the particle is K . Then the force applied by particle on the shell at this instant is :-

The graph of the total number of alpha -particles scattered at different angles in a given interval of time for alpha - particles scattering in the geiger- marsden experiment is given by