What is true of a lunar eclipse and a new moon?

a. they are both seen by a lit up moon
b. they are different phenomena
c. they are caused by the sun
d. they are the same thing

B would be your best choice because a new moon is caused by the sun being behind the earth where the moon can not covet (steal) its light, and a lunar eclipse is caused by the moon traveling in front of the sun

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.