Biology, 20.10.2019 18:50 issagirl05
It could take up to 3 years for a manned spacecraft to reach mars and return to earth. this is a long time for a spacecraft to be supplying cool air and oxygen to the crew and to be processing wastes.
how might manned missions to mars decrease the energy needed to perform these tasks?
a.
put the crew in airtight space suits.
b.
train the crew to live without oxygen.
c.
put the crew in a state of hibernation
d.
train the crew to not produce any waste.
Answers: 3
Biology, 22.06.2019 15:10
What tool do geneticists use to predict the outcome of genetic crosses? a.karyotype b.punnett square c.centrifuge
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Biology, 22.06.2019 18:00
The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?
Answers: 2
Biology, 22.06.2019 18:30
Which gas prevents the spread of fire and extinguishes it? is a type of compressed gas that prevents the spread of fire and extinguishes it.
Answers: 1
It could take up to 3 years for a manned spacecraft to reach mars and return to earth. this is a lon...
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