If physics is your favorite subject, then you must know the answer to these questions. (PART-3)
1.
When does the gravity be negative?
As when an
object is thrown upward in the direction opposite to the earth the value of g
is turned to be negative
2.
What is buoyancy?
The
tendency of objects to float in a fluid, upthrust force exerted by the fluid on
body opposite to gravity.
3. In which mirror do we get virtual images?
Plane mirror
4.
Why do the objects with different
masses fall at the same time?
As the
gravitational force depends on the masses of both objects, the force or pull of
g will be greater on heavier mass and less on lighter mass and both would compensate
each other.
5.
Difference between dispersion and
scattering?
Dispersion is defined as the separation of white light into
different colours when the light is passed through the prism.
The process in which light gets deflected by the tiny particles in the medium through which the light passes is called scattering.
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