Answer:
A) 37°
Explanation:
The formula for the critical angle is:
Where,
is the critical angle
is the refractive index of the refractive medium. = 1.33
is the refractive index of the incident medium. = 1.43
Applying in the formula as:
The critical angle is = sin⁻¹ 0.93006 = 68.4442°
Angle of incidence is half of the critical angle. So,
Angle of incidence = 68.4442° / 2 = 34.2221°
Using Snell's law as:
Where,
is the angle of incidence ( 34.2221° )
is the angle of refraction ( ? )
is the refractive index of the refraction medium (water, n=1.33)
is the refractive index of the incidence medium (glass, n=1.43)
Hence,
Angle of refraction= sin⁻¹ 0.6047 = 37°.
<span>Galileo Galilei was the first astronomer to use a telescope to study the heavens. Galileo made a number of observations that finally helped convince people that the Sun-centered solar system model (the heliocentric model), as proposed by Copernicus, was correct. These arguments can be divided into two kinds: Those that proved that the Ptolemaic model was incorrect and those that undermined the broader philosophy of Aristotelianism that included the Ptolemaic model. We'll first consider some philosophically important observations and then the ones that pro</span>
Answer:
perpendicular to the direction of the greatest stress
Answer:
Explanation:
Films are widely popular and their audio visual nature provides them a pervasive power for social influence. Therefore, they have the potential to play an important role as a medium of entertainment, information and education and as a catalyst for social change. Films are popular because they entertain.
Movies are about sitting in a theatre, watching something- watching a story unfold with people you don't know- watching that happen and emoting an emotion knowing that for those two hours or so, when one walks into that theatre, he/she don't have to worry about what is going on outside.
The solution to the problem is as follows:
person's speed when water is hit = V = √2gh = 7.65 m/s
person's momentum when water is hit = 7.65m = 489.6 kgm/s
avg speed under water = 7.65/2 = 3.825 m/s
time to stop under water = 1.14/3.825 = 0.30 s
<span>
Favg = change in momentum/time to stop = 489.6/0.30 ≈ 1632 N ANS
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