For an atom with the energy levels below, what wavelength light (in nm) will be emitted in a transition between E5 and E1 (indicated by the down arrow below)? (Give your answer to one decimal place.)

The answer is yes b ffgnbsfgnbnfgbnfgsnb

Sorry i dont understand the question can you rephase it?

They cool it down and aluminum cools easily

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.