False. Her muscles weakened because of the WEAKER force of gravity in space. Muscles are one of those things that if you don't yoozum, you loozum. Your brain is another one.
Standing waves can be thought of as a sin wave and a cos wave overlapping each other. They go in different direction hence Cis correct
Wave interference can be thought of as the opposite of destructive ---> constructive anda hencd meet and interact on the same medium such that answerBis correct