Answer:
This resulting in a substantial drop in the engine airflow and the net thrust.
Explanation:
- A ramjet is a type of the flying stovepipe or a hyper-sonic air-breathing propulsion and uses the engine motion to compress incoming air with an axial compression and employs a continuous combustion process.
- As the speed of the jet increase, the efficiency of the ramjet starts to drops and temperature increase with the combustion.
Person who modified Ptolemaic geocentric solar system was <u>Copernicus</u>
Answer: Option A
<u>Explanation:</u>
Ptolemy think that all the celestial bodies in the universe including the sun, all planets, moon, stars orbited Earth. Earth is the center of the universe and did not move at all. But Copernicus modified this model of Ptolemy.
Copernicus said that the sun is in the center of the universe and is not moving and not Earth and all the other planets of the universe orbit around the sun in circular paths and at uniform speeds.
Answer:
Potential energy in the coal gets transformed to electricity
Explanation:
- As when coal has burned the conversion of the energy takes place and the chemical energy in coal s converted into the electrical energy and thus heat is produced an is used to run the steam power engines.
- So as the heat energy derived from the coal is converted to kinetic and kinetic is converted to mechanical and this mechanical is coveted to electrical energy to further run the machines thus energy is not destroyed it only transfers.
It is D:canyons It does not tell you why it is Canyons! I hope this has helped you!!!