Sound follow up A drumhead is vibrating at a frequency of 500 Hz. If it makes 1500 vibrations at a temperature of 100C, how far does the sound travel?

Act has a 1200: 5 or 240: 1 turns ratio. it is short circuited. what is the maximum current at 1200a primary if we put a 100ohm resistor across the secondary end of the ct. use it as current source circuit.

Could someone . i have tried to solve myself but my calculation is off

Which branches of natural science include the study of an organism that lived 10 million years ago