Which of the following is a balanced equation? * A Na +F-> NaF
B H2+02 -> H2O
C Ca + Br --> CaBr2
D Na + C12 --> NaCl​

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?