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

What is part of a line has one endpoint and continues in one direction?

When doing scientific research ,the sources used should be ?

The results of huy's eye exam show that he is nearsighted. which explanation should huy expect to hear? "you need convex lenses to shorten the distance that light takes to focus in your eyes." "you need concave lenses to shorten the distance that light takes to focus in your eyes." "you need convex lenses to lengthen the distance that light takes to focus in your eyes." "you need concave lenses to lengthen the distance that light takes to focus in your eyes."