Yes, Celsius has to capitalized. . .
Yes.
A common noun is capitalized only when it is the first word in a sentence. A proper noun is always capitalized.
Unless it begins the sentence, neurologist is not capitalized.
Only if they are at the start of a sentence. Otherwise they are not capitalised.
Zero degrees on the Celsius scale equals thirty two degrees on the Fahrenheit scale.
Dodgeball is capitalized if it starts the sentence. But if dodgeball is used in the middle of a sentence it is not capitalized.
They are not proper nouns. They would not be capitalized in a sentence.
Yes, "PC" should be capitalized in a sentence.
No, the word forecast should not be capitalized in a sentence.
No, "personnel" is not capitalized when used in a sentence unless it is at the beginning of the sentence or part of a title.
No, "line manager" is not capitalized when used in a sentence unless it begins the sentence.
No, the word "novel" does not have to be capitalized in every sentence. It should be capitalized only if it is the first word in a sentence or part of a title.
Yes, "Celsius" is capitalized when referring to the temperature scale named after Anders Celsius.
No, "customers" is not typically capitalized in a sentence unless it is at the beginning of a sentence or in a title.
No, "pretologist" is not typically capitalized in a sentence unless it is at the beginning of a sentence or part of a proper noun.
It is capitalized at the beginning of the sentence.
No, it shouldn't be capitalized.