Yes I think & I Belive it moves across the surface
Answer:
20 km
Explanation:
he walks 10 km + another 10 km so 20 :)
Answer:
Ba(OH)2 + H2SO3 = BaSO3 + H2O -
Explanation:
Answer: 3 times as much the potential energy
Explanation:
Potential energy is the energy possessed by an object by virtue of its position.

m= mass of object
g = acceleration due to gravity
h = height of an object
When same object with same is lifted from 10 feet to 30 feet. The height has increased 3 times , thus the potential energy will also get 3 times as much.