Two station astronauts will each perform three 8-hour EVAs within 13 days to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. What is the total amount of oxygen needed by the two astronauts to accomplish this? Please put your answer in kg units.

Background information: Each EMU contains 0.54 kilograms of oxygen and has oxygen tanks (similar to scuba diving tanks) that work with a carbon dioxide removal system to allow one 6-hour to 8.5-hour spacewalk. Without the ability to remove carbon dioxide, the oxygen in the tanks would run out more quickly, because much would be tied up in exhaled gas. The amount of oxygen consumed, and carbon dioxide produced by a crewmember is dependent on his/her metabolic rate, so each tank can not be used for more than one EVA.

24hrs/(6hrs/tank)=4 tanks=4(.54kg)

Wow @bobpursley

6 EVAs total (3 for each crew member, of which there are 2)

1 tank can only be used for one EVA

therefore 6 tanks needed.

I will leave the rest up to you because I know VASTS would disapprove of this.

VASTS will disapprove of a person asking for help, when they are not in anyway giving examples. How nice of you. The question asked amount of oxygen not amount of tanks. Thank you for answering but i had already solved the question before placing d question.

To calculate the total amount of oxygen needed, we need to calculate the total amount of oxygen consumed by each astronaut for each EVA and then multiply it by the number of EVAs they are performing.

Given that each EVA lasts 8 hours and each EMU contains 0.54 kilograms of oxygen, we can calculate the amount of oxygen consumed per EVA:

Oxygen consumed = 0.54 kg/EMU

Now, let's calculate the total amount of oxygen consumed by each astronaut for one EVA:

Total oxygen consumed per astronaut for one EVA = Oxygen consumed x Number of EMUs

Assuming each astronaut uses one EMU for the EVA, the total oxygen consumed per astronaut for one EVA would be:

Total oxygen consumed per astronaut for one EVA = 0.54 kg/EMU x 1 EMU = 0.54 kg

Now, since each astronaut is performing 3 EVAs, we can calculate the total oxygen consumed by each astronaut:

Total oxygen consumed per astronaut = Total oxygen consumed per astronaut for one EVA x Number of EVAs

Total oxygen consumed per astronaut = 0.54 kg/EVA x 3 EVAs = 1.62 kg

Since there are two astronauts, we can calculate the total amount of oxygen needed:

Total amount of oxygen needed = Total oxygen consumed per astronaut x Number of astronauts

Total amount of oxygen needed = 1.62 kg x 2 astronauts = 3.24 kg

Therefore, the total amount of oxygen needed by the two astronauts to accomplish these EVAs is 3.24 kilograms.