A skilled gunman always keeps his gun tilted above the line of sight while shooting .Why?

Free electron always keep on moving in a conductor. Even then, no magnetic force acts on them in a magnetic field unless a current is passed through it. Why?

While watering a distant plant,a gardener partially closes the exit of the pipe by putting his finger on it.Why this results in the water streams going to a longer distance?

Explain why:- a cricketer moves his hands backwards while holding a catch.

Answer the following questions: Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.) Why?

A bullet of mass m fired at 30^@ to the horizontal leaves the barrel of the gun with a velocity v. The bullet hits a soft target at a height h above the ground while it is moving downward and emerges out with half the kinetic energy it had before hitting the targtet. which of the following statements are correct in respect of bullet after it emerges out of the target?

Why is there always a time gap between observing flash and hearing a thunder of clouds while both take place simultaneously?

Why a cricket player lowers his hand while taking of catch of cricket ball ?

In an experiment to determine the focal length (f) of a concave mirror by the u-v method, a student places the object pin A on the principal axis at a distance x from the pole P. The student looks at the pin and its inverted image from a distance keeping his/her eye in line with PA. When the student shifts his/her eye towards left, the image appears to the right of the object pin. Then,