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kramer
3 years ago
6

Light passes from a material with index of refraction 1.25 to one with index of refraction 1.72. The angle of incidence is 34.3°

. What is the angle of refraction?
Physics
1 answer:
kicyunya [14]3 years ago
8 0

Answer:

angle of refraction is 24.17°

Explanation:

given data

index of refraction n1 =  1.25

index of refraction n2 = 1.72

angle of incidence θ1 =  34.3°

to find out

angle of refraction (θ2)

solution

we will apply here snells law that is

n1 sinθ1 = n2 sinθ2    .........................1

here put all these value and find θ2

1.25 sin34.3 = 1.72 sinθ2  

sinθ2  = 0.70440 /1.72

sinθ2 = 0.4095

θ2 = 24.17°

so here angle of refraction is 24.17°

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A string of mass 60.0 g and length 2.0 m is fixed at both ends and with 500 N in tension. a. If a wave is sent along this string
Darya [45]

Answer:

a

The  speed of  wave is   v_1  = 129.1 \ m/s

b

The new speed of the two waves is v =  129.1 \ m/s

Explanation:

From the question we are told that

    The mass of the string is  m  =  60 \ g  =  60 *10^{-3} \ kg

    The length is  l  =  2.0 \ m

    The tension is  T  = 500 \ N

Now the velocity of the first wave is mathematically represented as

     v_1  = \sqrt{ \frac{T}{\mu} }

Where  \mu is the linear density which is mathematically represented as

      \mu  =  \frac{m}{l}

substituting values    

     \mu  =  \frac{ 60 *10^{-3}}{2.0 }

     \mu  =  0.03\ kg/m

So

   v_1  = \sqrt{ \frac{500}{0.03} }

   v_1  = 129.1 \ m/s

Now given that the Tension, mass and length are constant the velocity of the second wave will same as that of first wave (reference PHYS 1100 )

     

8 0
3 years ago
A 78−kg skier is sliding down a ski slope at a constant velocity. The slope makes an angle of 21° above the horizontal direction
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Answer:

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Explanation:

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Fr=78kg x 9.8m/s2 x sin(21)=274N

<em>friction= coefficient of kinetic friction x normal force of from the slope</em>

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Fr= u x 78kg x 9.8m/s2 x cos(21)=274Nu=274/677=0.41

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3 years ago
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Aloiza [94]

Answer:

Height above the floor from the bottom is 0.82m

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Explanation:

See attached file

3 0
3 years ago
A ball droped from a building. How fast is it traveling after falling 3.55s
algol [13]

Answer:

d = 61.75 m

Explanation:

Given that,

A ball droped from a building.

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