Answer : Hydrogen fuel cells are considered to be better than fossil fuels because of many reasons, some of them are mentioned below;
a) It is a clean fuel it does not causes any pollution to the atmosphere.
b) It more efficient than many other available fuel cells.
c) Preparation of hydrogen fuel cell relies on the free or compounded state availability hydrogen in nature, which in plenty.
d) They do not make any noise while it is being used. Hence these are considered to be quiet fuel cell.
e) They can be used for longer hours as compared to other fuel cells.
They have similar properties.Bromine and Chlorine both have equal chemical properties. They both have 7.electrons in the outermost energy level. They both gain 1 electron to get the. noble gas configuration.Cl and Br have same chemical properties. They have 7,valence electrons. They both are non-metals. Bromine and chlorine are in group VII A, which could also be designated Group 7a, of the narrow form periodic table that was commonly used before 1980. Most chemists now prefer a wide form periodic table, in which these elements are in column 17. The periodic table has been set up to illustrate the repeating nature of the elements as we progress along their atomic number. Cl (chlorine) and Br (bromine) are very similar because they both have seven valence electrons, and both need only one more to be like a noble gas. (The need to have eightelectrons in the outer main shell is called the octet rule, and the reason for <span>this is understood by scientists, but is complicated.) HOPE IT HELPED
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Answer:In the winter the polar jet moves south and becomes stronger because the North Pole gets colder but the equator stays about the same temperature. This increases the temperature contrast and moves the strengthened polar front jet farther south.
Explanation:
Usually a ball would roll toward the side that's lower, so if you had a ramp and put it on the side that was lower, then the ball would change direction and go the opposite direction
<u>Answer</u>:
Eye colour is one example of a trait caused by the concentration of melanin in genes.
<u>Explanation</u>:
Eye colour is decided based on two distinct factors- pigmentation of the eye’s iris and scattering of the light by the 'stroma of the iris'. It is a 'polygenic phenotypic' character in a human being.
The pigmentation of the iris varies between brown and black, that all depends on melanin concentration in the iris stroma, iris pigment epithelium and the cellular density of trauma. Further, the eye colour genetics are complicated and multiple genes are responsible for same.