Are the waves in this application transverse, longitudinal, or both? If either transverse or longitudinal waves are missing from the application explain why?On what parameters of the media (pressure, temperature, mass, density,... ) does the wave speed depend?

Explanation:

consider the radio wave which is electro magnetic wave used for radio communication.

the wave propagates for air or vacuum.the wave presented by air is a transverse wave the radio wave speed is constant that is, equals to the speed of light as it is now electromagnetic waves.now the general relationship between frequency, speed and wavelength is given by

                         c = v/

                = c/v          

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

Ok what do you need with