When building a spacecraft what are the 3 things NASA is most concerned about?

Explanation:

When a spacecraft is built, many tests must be carried out over the years to prove that the spacecraft has the ability to launch into space and fulfill its mission efficiently. In addition to supporting the launch, these ships need to be built in a way that will withstand space conditions that are very different from terrestrial conditions.

For this reason, there is a concern if the ship can withstand extreme situations of temperature, pressure, gravity, weight, among others. In summary, we can say that three of the biggest concerns that NASA has in building spaceships are:

i think the answer is g1

hope i

-lavira: )

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!