Find the units of density, `("density")/("mass")` and `("electric currect")/("time")`

Answer

A `s^(-1)`

Explanation

Density = `("Mass")/("Volume")=(kg)/(m^(3)) = kg m^(-3)`
`("Density")/("Mass")=(kg m^(-3))/(kg) = m^(-3)`
`("Electric current")/("Time")=(A)/(s) ="A s"^(-1)`