Ill give 100 points for best answer.

i just need some with the second fact ! i already solved the first one.
my answer for the first fact was: 433.96 seconds but i'm stuck at the second one.

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b