91) For waterlogged rice cultivation, the fertilizer that may be avoided is -

Answer is:

None of these

In progressive waves, the amplitude may be constant and neighboring points are out of phase with each other

In air or other gases, a progressive anti node occurs at a displacement node and a progressive node occurs at a displacement anti node

Longitudinal wave can be polarized while transverse wave cannot be polarized

Transverse wave can be polarized while longitudinal wave cannot be polarized

Answer is:

Answer is:

Answer is:

Answer is: