Protons are positive +
Neutrons are neutral and have no charge
Electrons are negative -
True, all motions are related to inclined planes.
Answer:
H = 70.4 m
Explanation:
Here first of all the balloon will drop to the the floor under free fall motion and then the sound of splash will come up at constant speed
so we will say that if the total height is H
so the time to fall is given as
now we have
also we know that the time to come the sound upwards is
so we will have
now plug in all data
by solving above equation we have
H = 70.4 m