Maybe it is, maybe it isn't. We can't tell, until we see what "this" is.
Show us a drawing, an equation, an expression, a statement ... something !
The average speed is the distance per time ratio. velocity is the rate at which the position changes
The best frequency should be 70 Hz you simply find the difference between 280 Hz and 210 Hz
Answer:
some common devices that use current carrying conductors and magnetic fields are electric motor electric generator loudspeakers microphones and measuring instruments like galvanometer ammeter and voltmeter
