vector is described as having magnitude 5 and angle -20°. which is an equivaent statement of magnitude and angle of vector ? (note: all angles are measured counterclockwise from the x-axis.)

magnitude 5; angle 70°

magnitude 5; angle 20°

magnitude -5; angle 20°

magnitude 5; angle 160°

magnitude -5; angle 160°

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.