I was having trouble with this problem, and problems like it: A 3.2 kg pelican, with a 1.73 kg fish in its mouth, is flying 1.52 m/s at a height of 40 m when the fish wiggles free and fall back toward the ocean. How fast is the fish moving when it hits the water?

28.1 m/s

Explanation:

= Initial velocity of the fish = 1.52 m/s

y = Height of the bird = 40 m

= Acceleration in y axis =

= Initial velocity in y axis = 0

The final velocity in x direction will remain the same as the initial velocity as there is no acceleration in the x direction

Resultant velocity is given by

The fish is moving at a velocity of 28.1 m/s when it hits the water.

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).

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i just did this and got a 100.