When the sun reaches the end of released into space, forming a life cycle, the expanded part will be Planetary nebula.
<u>Explanation:</u>
Planetary nebula formed after when the external layer is shredded due to running out of fuel so that it can burn. This external layer of gas expand into the space, the shape of nebula can often be ring shaped or even a bubble. At the centre of this nebula it has the shinning left over middle part of the star. This star can also be seen. The temperature of the nebula is 100000C. The planetary nebula last for about 10000 years between its formation and the recombination.
Answer: Protons and electrons are far apart with lots of empty space in between.
Explanation:
Atom is defined fundamental part of a matter. Atom is composed of three sub particles protons, electrons and neutrons.
In an atom, electrons are located in orbits around the nucleus. Nucleus of an atom is located at center of the atomic sphere where protons and neutrons are present. Hence, it will be correct to say that "protons and electrons are far apart with lots of empty space in between".
Answer: A) The 'lub' sound is caused as the atrioventricular valves close.
Explanation:
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Explanation:
There are a number of ways to produce hydrogen: Natural Gas Reforming/Gasification: Synthesis gas, a mixture of hydrogen, carbon monoxide, and a small amount of carbon dioxide, is created by reacting natural gas with high-temperature steam. The carbon monoxide is reacted with water to produce additional hydrogen.
As of 2020, the majority of hydrogen (∼95%) is produced from fossil fuels by steam reforming of natural gas, partial oxidation of methane, and coal gasification. Other methods of hydrogen production include biomass gasification and electrolysis of water.
The right answer is to measure the amount of released carbon dioxide.
The carbon dioxide exhaled by the lungs can reflect the energy consumed by the body since it comes from the degradation of glucose which is the main energy substrate. And this is a better indicator of energy consumption than measuring heart rate because it can be inflected by several factors.
A is false because glucose is not found in the urine, except in the case of diabetes mellitus.
C is false because the consumption of calories does not mean that we will directly use it.
D is wrong because perspiration is independent of energy consumption, this is a way to cool the body after exercise.
