Neglecting friction and air resistance, the first hill must be built 4 times higher than it is now.
Answer:

Explanation:
Given that:
The air resistance and friction = 700 N
The gravity caused force = 716 × 9.8 = 7016.8
Total force = (7016.8 + 700) N
Total force = 7716.8 N
∴




Compressions are the areas of high pressure while rarefractions are low pressure area
Explanation:
it dosent depend on the weights of the items. I'll reach the ground at same time taking as no air friction or restrictions.
i.e
v = u + gt
whte v is final velocity of the object
u is initial velocity of the object
g is acceleration due to gravity and
t is time. thanks
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6.022*10^23 atoms/mole of reactant
(this is chemistry not physics)