Standing waves are formed inside a cylindrical tube with one end closed and the other end open to air. The first resonance occurs at a frequency of 354 Hz. What is the length of the tube in meters

Ithink the answer is d i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

A. to determine if humans can explore mars safely

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

I'd go for the one that says that knees are fulcrums, lower legs are levers and the ankles hold loads.hope it ,happy homework/ study/ exam!