What type of substances produce line spectrum?

What type of substances would make better permanent magnets, ferromagnetic or ferrimagnetic.Justity your answer.

What type of substances would make better permanent magnets, ferromagnetic or ferrimagnetic. Justify your answer.

Examine the given defective crystal Answer the following questions: What type of ionic substances show such defect?

An explosion takes place at the bottom of a lake.What type of waves are produced inside the water?

An amoeba on fission produces two amoeba. What type of asexual reproduction is this?

What type of substances exhibit anti-ferromagnetism?

What type of motion is produced by a ceiling fan ?

On dropping a pebble in still water, what type of waves are produced on the surface of water?

What types of allele produces its effects only in homozygous individuals?