the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur

the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur

the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur

the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur

a person who endorses a promissory note without compensation or benefit but simply as a favor to the borrower

a person who endorses a promissory note without compensation or benefit but simply as a favor to the borrower

the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices

a transmission that automatically changes the gears according to the speed of the car

a transmission that automatically changes the gears according to the speed of the car

a transmission that automatically changes the gears according to the speed of the car