Physics
If a body moves with a constant speed in a circle

Its velocity remains constant
No force acts on it
No work is done on it
No acceleration is produced in it

ANSWER DOWNLOAD EXAMIANS APP

Physics
Purpose of an optical filter is to

Dispense light into component colours
Refract light of different colours
Transmit or absorb light of different colours
Reflect lights of different colours

ANSWER DOWNLOAD EXAMIANS APP