1 A net force of 36 N acts on a shopping cart full of groceries producing an acceleration of 3.0 m/s^2. If the empty cart has a mass of 4.0 kg, what
is the total mass of the groceries inside? *
C 16 kg
OD 8.0 kg
B 4.0 kg
O A 12 kg

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?