I need help ASAP... plz...

Work done is same from both paths.

Explanation:

The diagram says that the work done in getting an object up the  track through distance must equal the work one in lifting the object vertically through distance . This is the law of conservation of energy,which here demands that because gravity is a conservative force, work done in lifting an object up must not depend on the path taken (because the gravitational potential energy you gain only depends on the vertical distance).

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).