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Kipish [7]
3 years ago
7

The angle of incidence of another red ray is 65º. The refractive index of the glass of block

Physics
1 answer:
Mamont248 [21]3 years ago
6 0

Answer:

34º

Explanation:

The computation of the angle of refraction in the glass for this ray is shown below:

Given that

the angle of incidence of another red ray is 65º

And, n_1 = 1

n_2 = 1.62

According to shell law

n_1 sin \theta_1 = n_2 sin \theta_r

sin \theta_r = 1 sin 65÷ 1.62

= 0.559

\theta_r  = sin^-1 (0.559)

= 34º

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First we will use the concepts of motion kinetics for which the final speed is defined as shown below,

v_f^2=v_i^2+2as

Here,

v_f= Final velocity

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a = Acceleration

s = Distance

Replacing,

(35)^2 = v_i^2+2(1.5)(392)

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Using the conservation of energy for kinetic energy we have,

KE = \frac{1}{2}mv_i^2

KE = \frac{1}{2}(1302)(7)^2

KE = 31900J

Therefore the kinetic energy of the car is 31900J

5 0
3 years ago
What is the velocity of a 50kg skater if her momentum is 225kg. m/s?
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|Momentum| = (mass) x (speed)

225 kg-m/s =(50kg) x (speed)

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3 years ago
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Which statement is TRUE? Question 5 options: Waves travel at different speeds through different materials. Wave speed depends on
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Waves move through different vmaterials

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On a 100km track , a train travels the first 30km with a speed of 30km/h . How fast the train travel the next 70 km if the avera
nirvana33 [79]

Solution :-

Given :

Distance 1 = 30 km

Distance 2 = 70 km

We know that speed = distance/time

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When the train acquired a speed of 30 km/hr, the time taken = 30/30 = 1 hour

Average speed = 9distance 1 + distance 2)/(time 1 + time 2)

AS time 2 or t2 is time taken for the second part of the journey of 70 km

⇒ 40 = 100/(1 + t2)

⇒ 40 + 40t2 = 100

⇒ 40t2 = 100 - 40

⇒ 40t2 = 60

⇒ t2 = 60/40

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Speed of the second part of the journey = distance 2/time 2

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⇒ 46.666 km/hr or 46.7 km/hr.

Hence the answer is = 46.666 km/hr or 46.7 km/hr.

Hope it helped u if yes mark me BRAINLIEST!

Tysm!

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