Aman carries a 12-kg chair up one flight of stairs to the second floor of his house. if the second floor is 3.3 m above the first floor, what is the change in the gravitational potential energy of the chair? a - 180 j b + 390 j c + 180 j d - 390 j e zero

Change in gravitational potential energy of the chair is,

Explanation:

It is given that,

Mass of the chair, m = 12 kg

Distance of the second floor from the ground, h = 3.3 m

The position of ground at h = 0

Let is the change in gravitational potential energy of the chair. Initial potential f the chair is equal to 0.

or

So, the change in the gravitational potential energy of the chair is 390 joules.

answer: its c lololo

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .