Which of the following BEST describes what occurs in a fusion reaction? A.
Two low mass nuclei are joined to form one nucleus.

B.
A single nucleus divides into two or more nuclei and gives off energy.

C.
Electrons are shared between the nuclei.

D.
A chemical reaction occurs between the nuclei.

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up