I have a couple of questions ... Waves that we cannot actually see (unlike ripples in water) and those that DO need a medium to travel through belong to which category of waves? an How do astronauts overcome this obstacle (answer #3) when communicating in space? Thanks

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d. the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

All of the following are part of the biosphere except