Afirefighter mounts the nozzle of his fire hose a distance 32.1 m away from the edge of a burning building so that it sprays from ground level at a 45 angle above the horizontal. after ing a hotspot at a t of 9.21 m, the firefighter adjusts the nozzle diameter so that the water hits the building at a height of 17.1 m. by what factor was the nozzle diameter changed? assume that the flow rate of water through the hose stays the same, and treat the water as an ideal fluid. number

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

its c i just checked it

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.