Which statement correctly describes a characteristic that a scientific measuring tool should have?
A. To be accurate, it must be able to make measurements using very
large units.
O B. To be accurate, it must be able to give consistent measurements
of a quantity
C. To be accurate, it must be able to make measurements using very
small units.
O D. To be accurate, it must be able to make measurements that are
close to the actual value.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?