In which situations is heat flow present? Check all that apply.
2 answers:
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Explanation:
In order to compute correctly the sum of the two terms, we have to rewrite one of them such that they have the same exponent.
The two terms are:
For instance, we can re-write the second term such as it also has a power . In order to do that, we have to move the decimal point one place to the left, therefore:
At this point, the two numbers have the same exponent, so we can just add them together by adding the bases and keeping the same exponent, -2: