Physics
Land is considered a resource because it

Is always available to use
Is used to produce things
Requires labor to be useful
Costs little or nothing to use

ANSWER DOWNLOAD EXAMIANS APP

Physics
Radiocarbon is produced in the atmosphere as a result of

Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
Lightning discharge in atmosphere.
Action of ultraviolet light from the sun on atmospheric oxygen.
Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.

ANSWER DOWNLOAD EXAMIANS APP

Physics
A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

B will reach the ground first.
The question is incomplete because the masses of the spheres are not given.
Both the spheres will reach the ground simultaneously.
A will reach the ground first.

ANSWER DOWNLOAD EXAMIANS APP