| D 2. 10) Choose the best answer. What is the net energy ratio for PV cells? 8.6-9 5.6-7 6.5-8

If a particle has z = 25 and 23 electrons, what is its charge?

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .

Gene expression control that occurs during the generation of rna is a. controlled at transcription b. control before transcription c. controlled after transcription d. controlled after translation