If you are referring to the formula bar in Excel, then you can do it through the View menu. Usually the Formula Bar is visible, but you can turn it on and off in the View menu.
a URL
histogram; bar graph
You can't. Not all movies display the status bar and some will only display the bar for a few seconds, but there is no way to remove it entirely
voice bar
Yes.
formula bar
In both the formula bar and the cell itself.
bar chart/bar graph
When you want to display data over a length of time.
You may be referring the formula bar. It displays the cells contents, which can be values or formulas.
Both a pie and a bar graph are alike because they display data.
Bar graphs are used to display countable data that are grouped in categories.