Pls the hubble space telescope, one of mankinds greatest advances in understanding space, was launch in 1990. hubble is a space-telescope that orbits earth above the atmosphere. how can a space-telescope such as hubble provide more valuable data than a traditional ground-telescopes used by astronomers? a) closer to objects in space b) more expensive and better technology c) atmosphere distorts and blocks the light d) secret technology not used in ground-telescopes

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

Which position represents spring in the southern hemisphere? a) b) c) d)

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.