Help = brainlist please

(a) Waves P and Q have the same frequency, but wave P has twice the wavelength of wave Q

(b) Waves Q and R have the same wavelength, but wave R has twice the frequency of wave Q.

(c) Wave T shows a steady frequency but changing amplitude

(d) Wave S shows a steady amplitude but changing frequency

(e) Waves Q and R have a low amplitude and a steady frequency

HOPE THESE ARE RIGHT

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .