By defeaut, excel cells are top aligned
a. true
b. false

True

Explanation:

Yes, the given statement is true that the by default the excel cells are basically aligned at the top. We can easily change the alignment horizontally and vertically in the cell.

In the excel we can change the alignment by selecting the particular cell and then, click on the options to select the particular tab to change the alignment of the cell. By default, the excel cell are aligned at the top and and the text are align at the left by default.  

the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)