4 x 1000 so 4 kilometers are equal to 4000 meters
The spherical object will float and the square object will sink to the bottom of the fluid as it has greater density. :)
Alexander Fleming and penicillin is used to help fight gram positive bacteria and other bacterial infections
The SI unit for distance is metres - m.
The SI unit for speed or velocity is metres per second - m/s.
The SI unit for acceleration is metres per second squared. - m/s^2.