How does M.I. change with speed of rotation.

Which law is used by a ballet dancer to change her speed or rotation?

Does M.I. change with change of the axis of rotation?

How does the drift speed of electrons in a metallic conductor vary, when applied potential difference is decreased keeping temperature constant?

How does plant cell change its shape?

A block of wood is floating on water at 0^@ C to 8^@C .How does the volume,v change with use in temperature?

How does surface tension change with temperature?

Two dics of moments of inertia I_1 and I_2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed omega_1 and omega_2 are brought into contact face to face with their axes of rotation coincident. Does the law of conservation of angular momentum apply to the situation? Why?

Two dics of moments of inertia I_1 and I_2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed omega_1 and omega_2 are brought into contact face to face with their axes of rotation coincident. Find the angular speed of the two-disc system.

How does dip angle change when one moves from magnetic equator to pole?