The ratio of phosphorous to oxygen is 2:5
<u>Explanation</u>:
- In a compound P2O5, the ratio of phosphorous to oxygen atoms is 2:5. Because there are two phosphorous atoms and five oxygen atoms. Both combined are called a P2O5.
- The elements of phosphorous and oxygen are added to P2O5. So P2O5 is called as phosphorous pentoxide. The element phosphorous will be added to oxygen and it will form a chemical reaction.
- This includes a change in the energy of P2O5. So the new energy will be produced.
The rocket pushes the exhaust gases backward and there is an "equal and opposite reaction" that pushes the rocket forward.
Answer: Option (b)
<u>Explanation:</u>
Rocket is one of the propulsive unit functions similar to air-filled balloons and it works on the principle of newton thirds law of motion.
This law states that for every action there will be an equal and opposite reaction.
The fuel is burned inside the rocket and it releases the exhaust gas and these gases create an impact of force that propels the rocket into space.
The small amount of water is evaporated and turned in to steam. Due to this expansion, pressure builds up inside of the kernel, and once that pressure is of a large enough magnitude, the kernel "pops", allowing for the steam to escape. Thus, a piece of popcorn is formed.
