A 10.0 cm high candle is placed 15 cm in front of a concave mirror. If the image of the candle appears 9 cm away from the vertex, what is the image height and inversion?

t.                 w               e                 n                   t                 y                 c             h               a           r           a               c                 t             e             r             s        

where's the following? you gotta add it to know what the choices are

explanation:

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.