What machine is the least simple? A.) A lever

B.) A Bike

C.) An Inclined Plane

D.) A Screw

Bike

Explanation:

bike is the most complex on here, chain, brakes, gears, and tries,

inclined plank is a little complex, gears and plates

lever requires gears or eletric wires,

and least complex is A screw

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

the answer is the index of refraction of the second medium is higher. i just took the test.