Which of the following is the most appropriate unit to describe the rate at which water flows out through a standard household faucet?

minutes per gallon, because the independent quantity is volume of water in gallons and dependent quantity is time in minutes.

gallons per minute, because the independent quantity is volume of water in gallons and dependent quantity is time in minutes.

minutes per gallon, because the independent quantity is time in minutes and dependent quantity is volume of water in gallons.

gallons per minute, because the independent quantity is time in minutes and dependent quantity is volume of water in gallons.

Gallons per minute, because the independent quantity is volume of water in gallons and dependent quantity is time in minutes.

Explanation:

As we know that gallons is the unit of volume which is used in US to measure volume of gas as well as liquids while time is measured in minutes.

Now we know that if we need to find the volume flow rate then in that case the measurement is done to find the amount of fluid flow per unit of time

so here since volume flow is an independent variable which do not depends on any other parameter while time is a dependent variable here which is given as

so correct answer will be

Gallons per minute, because the independent quantity is volume of water in gallons and dependent quantity is time in minutes.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.