1. In which of the following situations is the kinetic energy of the object decreasing? (A) A sphere is dropped from a building. (B) A satellite is moving in a circular orbit around Earth (C) A baseball is heading upward after being thrown at an angle.(D) an elevator is moving upward at a constant velocity ​

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

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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.