Answer:
I think it's a catalyst.
Explanation:
Definition: a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change
Answer:

Explanation:
Let assume that ball begins its movement at a height of zero. The height can be found by energy approach, to be precise, by Principle of Energy Conservation:


Answer:
Just in 1 dimension
Vpg = Vps + Vsg
Where
Vpg= relative to the ground
Vps= person relative to the ship
Vsg= ship relative to the ground
Vpg= Vps+Vsg ;
Vpg= 0.5 + 6
Vpg= 6,5 m/s
Stars live to long for just one person to see it die, usually it out lives all of us
Answer:

Explanation:
This is an exercise where you need to use the concepts of <em>free fall objects</em>
Our <u>knowable variables</u> are initial high, initial velocity and the acceleration due to gravity:



At the end of the motion, the <u><em>rock hits the ground</em></u> making the final high y=0m

If we <em>evaluate the equation</em>:

This is a classic form of <u><em>Quadratic Formula</em></u>, we can solve it using:




Since the <u><em>time can not be negative</em></u>, the <em>reasonable answer</em> is
