An airplane flying from New York to Los Angeles is traveling at a velocity of 1,400 kph west. There is a head wind with a velocity of 20 kph east. What is the resultant velocity of the airplane in kph?

1380 kph west

Explanation:

The resultant velocity is the sum of airplane velocity with respect to air and the velocity of wind with respect to ground. Since these 2 vectors are in opposite direction (east vs west), we will take the 20 kph east as negative

1400 west + 20 east = 1400 west + (-20)west = 1380 kph west.

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).