When heat is added to an object, what is happening to the item at the atomic level? (check all that apply)

the atoms in the structure are vibrating more.

the atoms begin breaking apart.

the atoms begin to move more.

the chemical bonds between atoms are broken.

At atomic level, the following is happening:

Explanation:

When heat is added to an object the kinetic energy of its atoms is increased. That makes the atoms to vibrate more and to move more.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)