You are playing with a yoyo . If Potential energy of the yoyo is 18 J , and the total mechanical energy is 20 J , how much kinetic energy does the yoyo have ?

the kinetic energy of the yoyo is 2 J.

Explanation:

Given;

potential energy of yoyo, P.E = 18 J

total mechanical energy, M.E = 20 J

The kinetic energy of yoyo is calculated as;

M.E = K.E + P.E

where;

K.E is the kinetic energy

K.E = M.E - P.E

K.E = 20 J - 18 J

K.E = 2 J

Therefore, the kinetic energy of the yoyo is 2 J.

b.

explanation:

10.0

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.