Two forces, f1=12n and f2= 9n, act on object have acceleration(5m/s2) calculate the mass.​

Based on the law of conservation of energy, which statement is false? answer- energy is lost when machines dont work right

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.