Two technicians are discussing back pressure. Technician A says that higher exhaust-system pressure leads to lower manifold vacuum. Technician B says that back pressure can be tested with an oxygen sensor, and EGR valve, or an AIR valve. Who is correct? A. Technician A B. Both Technicians A and B C. Technician B D. Neither Technician A nor B​

How have the greenhouse gasses increased from the year 2000 to 2018

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.