Physics
Energy is continuously created in the sun due to:

Nuclear fusion
Radioactivity
Nuclear fission
Artificial radioactivity

ANSWER DOWNLOAD EXAMIANS APP

Physics
Why does bleeding occur through the nose in high mountainous regions ?

The pressure at high altitudes is greater than that on the plains
The blood pressure of a person increases at high altitudes
The pressure of blood in capillaries is greater than the outside pressure
The blood pressure fluctuates and finally decreases drastically

ANSWER DOWNLOAD EXAMIANS APP

Physics
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

Both suffer the same change in momentum
The rubber ball suffers greater change in momentum
The metal ball suffers greater change in momentum
The initial momentum of the rubber ball is greater than that of the metal ball

ANSWER DOWNLOAD EXAMIANS APP