Questions

Gravitational Force

Blue Zone is the hottest part of the flame that is where the flame has the most Oxygen and you are getting complete combustion. It is about 1400 degrees Centigrades. The Reddish part (Non - Luminous Zone) is the coolest part, about 800 deg C.

Echolocation is an adaptation bats use to hunt insects in flight, locate flowering plants and find warm places for hibernation.

Augustus was a Roman statesman and military leader who served as the first Emperor of the Roman Empire, controlling Imperial Rome from 27 BC until his death in AD 14. Jesus was born in 4 BC.

Hence, Augustus was the Roman Emperor when Jesus was born.

ACTH means Adrenal Corticotrophic Hormone.

CRH - Corticotrophin Releasing Hormone produced by hypothalamus stimulates the pituitary gland to release the ACTH which in turn produces corticosteroid hormones by adrenal glands.

Hence, the given statement is TRUE.

Light travels fastest in Vacuum. The fastest thing in the whole universe is the speed of light in a vacuum like outer space. It is about 2.99 x 10⁸ m/s. 

Oligopoly is market structure where a small number of large firms are there. Oligopolistic industries are characterized by a few dominant firms and substantial entry barriers.