Answer:
Explanation:
From the question we are told that
Mass 
Height 
Generally the equation for velocity before impact is is is mathematically given by
Generally the equation for Kinetic Energy is is mathematically given by
Answer:
mass.
Explanation:
other physical factors are changeable but the mass of a particular substance is always constant.
Yes. sound waves are produced by energy.
Sound travels better in water
-- Take a straight ruler.
-- Lay it down with the 'zero' mark at the start point.
-- Rotate it around the start point until the end point is also touching the edge of the ruler.
-- From the marks on the ruler, read the straight-line distance from the start point to the end point.
-- Without moving the ruler, observe and write down the DIRECTION from the start point to the end point.
-- The Displacement is the straight-line distance and direction from the start point to the end point.
