For general projectile motion with no air resistance, the vertical component of a projectile's acceleration (gravity) A. Remains zero

B. Remains a non-zero constant (9.8m/s^2)

C. Continuously increases

D. Continuously decreases

so easy. just google the electromagnetic waves and it’ll pop up.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

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.