How might using water somethimes require changing its original state?

Imagine that you own a property that is exactly 2.2 acres large. you want to sell your property, but your realtor tells you that you cannot sell your land by the acre. in order to sell your land you need to determine the area you own in units of square meters? given that there are 1.6 kilometers in 1 mile and 640 acres in 1 square mile, what is the area of land that you own in square meters square meters?

Acontrol during an experiment. might change remains constant does not exist does change

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device