4. Light is incident on water with an angle of 62 degrees to the surface what is the refracted angle? n, sin e, na sina​

mistakes are ok

the total distance traveled by the car is

30km + 49km = 79 km .

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j