Frequency is the the number of wave oscillation that occur in a second. It is measured in Hertz (Hz).
In this question, the frequency of the note is the number of beats that occur in a second. Given that they are Thirty beats are heard in one minute, hence:
Frequency = 30 beat / 1 minute = 30 beats / 60 seconds = 0.5 beat per second = 0.5 Hz
There is a gel (agarose) that is placed in abuffer-filled box and an electrical
field is applied via a power supply. The negative terminal
is at the far end (black wire), this causes DNA migrates toward the anode (red
wire).
