A man did 75J of work by lifting a 50N load from the floor onto a shelf, calculate the height of the shelf​

the diagram which shows forces as either balanced = same speed or unbalanced = accelerarting

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).

answera compound;