Salt concentration is the factor among the following factors given in the question that does not vary between a fast flowing river and a pond that receives no water input. The correct option among all the options that are given in the question is the second option. I hope the answer comes to your help.
Distance is the length of the path travelled
displacement is the shortest length of the path travelled
distance does not have direction, hence, it is a scalar quantity
displacement has direction, hence, it is a vector quantity
For example salt in water ,salt would dissolve ,you won't be able to see it but if you taste it it would still be there
dissolve /disappear but still be there
worms get their energy through the biological process of cellular respiration where glucose from the food they eat is converted into ATP. This molecule is packed with potential energy, and is used by the cells within the worm to do work.
Hope this helps (:
