Alex, a rescue piot drops a survival kit while her plane is flying horizontally at an altitude of 1800.0 m with a forward velocity of 140.0 m/s. a group of lost antarctica explorers is below on the ground. how far in front of the explorers should alex drop the supplies?

The kit has position vector with components

It would take time for the kit to reach the ground from freefall:

It sounds like Alex's plane is 1800 m above the ground, at some (horizontal) distance away from the explorers below, and is heading in their direction. In order to have the kit drop down where the explorers are located, Alex should release the kit at a distance of

away from the explorers.

continuous conducting path for current, power supply

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.