If a magnetic field is to exert a force on a current-carrying wire, the field must have some vector component:
a)parallel with the current
b)tangential to the current
c)concentric with the current
d)perpendicular to the current

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

0 = 0.40 / 0 = 0

= 0.20 = 9.80 ⁄2 =?

=0 , = = 0.20 =0.50 0 0.40 ⁄

=0−122 =0−12(9.80 ⁄2)(0.50)2 =1.2