Which of the following explains why NASA mandated that space food could NOT crumble or come apart? Crumbs may cause electronics to malfunction.
There is no way to clean crumbs, so all food must be contained.
Floating crumbs may get into astronauts’ eyes.
Crumbs increase the risk of bacteria development.

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?