An astronaut carrying a camera in space finds herselfdrifting away from a space shuttle after her tetherbecomes unfastened. if she has no propulsion device, what should she do to move back to the shuttle?

Explanation:

According to the conservation of momentum, if she throws the camera in the opposite direction of space shuttle, she drifts towards the shuttle.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue