Can someone pls help me with science I don't get it.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Is the time in tennessee the same as florida

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.