The crab nebula is the remnant of an exploded star. the explosion was witnessed by chinese astronomers in the year 1054 ce. the crab nebula is 6500 ly away. this means the explosion occurred in what year? a.6500 bce b. 5446 bce c. 1054 bce d. 1054 ce ( explain reasoning)

B

Explanation:

A light-year is used for distance that the light has traveled for 1 year, so they saw the explosion in 1054 which means that it exploded back in the 5446, since it's 6500 light years away.

analyze the map below and answer the question that follows.

what does the map above tell us about the endemity of typhoid fever?

a.

there is greater occurrence of the disease in the western hemisphere.

b.

there is greater occurance of the disease in the northern hemisphere.

c.

countries located in equatorial regions are more likely to have incidents of typhoid fever.

d.

typhoid fever is more rampant among caucasian populations.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.