Short easy $ 13points $
the heat flow due to the mass motion of a fluid or gas is accomplished by conduction
convection
radiation
all of the above

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Give the orbital configuration of the phosphorus (p) atom.