Why does an athlete run some distance, before taking a long jump?

(A) : Sportsman runs some distance before taking a long jump. (R) : A man in state of motion enables him to have greater velocity to jump due to inertia of motion.

Explain the following It is advantageous to run before taking a long jump.

Why does a gardner apply hormone IAA or NAA before planting rose cuttings?

Explain the following After alighting from a moving bus, one has to run for some distance in the direction of bus in order to avoid falling.

Why does the nose of some people start bleeding when an aeroplane climbs up suddenly?

At its closet approach, the distance between the mars and the earth is found to be 60 million km. When the planets are at this closet distance, how long would it take to send a radio message from a space probe of mars to earth?

Why does the lac operon shut down some time after the addition of lactose in the medium where E.coli was growing ? Why low level expression of lac operon is always required ?

In the searle's experiment, after every step of loading, why should we wait for two minutes before taking the reading?( More than one options may be correct).

In the searle's experiment, after every step of loading, why should we wait for two minutes before taking the reading?( More than one options may be correct).

Why are short waves used in long distance broadcasts?