Explanation

• Necrophobia is the abnormal fear of death or dead bodies.
• It is a type of specific phobia related to mortality.
• Affected individuals feel extreme anxiety when thinking about death.
• It may also include fear of corpses or funerals.
• It is a psychological anxiety disorder.

Last verified on 10-06-2026

Explanation

• Ornithology is the branch of zoology that deals with the study of birds.
• It includes bird behavior, classification, and migration patterns.
• Scientists who study birds are called ornithologists.

Last verified on 10-06-2026

Explanation

• Herpetology is the branch of zoology that studies reptiles and amphibians.
• Reptiles include: snakes, lizards, crocodiles, turtles.
• Amphibians include: frogs, toads, salamanders.
• The word comes from Greek “herpeton” meaning creeping animal.

Last verified on 09-06-2026

Explanation

• A stretched spring possesses potential energy.
• When a spring is stretched or compressed, energy is stored in it.
• This stored energy is called elastic potential energy.
• It can be converted into kinetic energy when released.
• The more the stretch, the more energy is stored.

Last verified on 08-06-2026

Explanation

Surface area = 4πr², Volume = 4/3πr³.  

Surface area is just derivative of volume w.r.t r.

2πr is circumference of a circle, not volume at all.

Last verified on 07-06-2026