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WARRIOR [948]
3 years ago
12

Light enters water from air at an angle of 25° with the normal, Θ1. If water has an index of refraction of 1.33, determine Θ2.

Physics
1 answer:
vladimir1956 [14]3 years ago
6 0
By Snell's law:

η = sini / sinr.        i = 25,  η = 1.33

1.33 = sin25° / sinr

sinr = sin25° / 1.33 = 0.4226/1.33 = 0.3177    Use a calculator.

r = sin⁻¹(0.3177)

r ≈ 18.52°

Option A.

God's grace.
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Which one of the following statements concerning superconductors is false? A constant current can be maintained in a superconduc
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in a longitudinal wave, the motion of the disturbance is in what direction relative to the wave motion?
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2 years ago
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6 0
3 years ago
A block of mass 27.00 kg sits on a horizontal surface with, coefficient of kinetic
zhannawk [14.2K]

Answer:

The force is  F  = 172 \ N

Explanation:

From the question we are told that

    The  mass of the block is  m_b  = 27.0 \ kg

     The  coefficient of  static friction is  \mu_s  =  0.65

     The coefficient of kinetic friction is  \mu_k  =  0.50

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      N  =  m *  g

substituting values

     N  =   27 *  9.8

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Given that the force we are to find is the force required to get the block to start moving then the force acting against this force is the static frictional force which is mathematically evaluated as

        F_f  =  \mu_s  *  N

substituting values

        F_f  =   0.65 *  264.6

        F_f  =   172 \ N

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       F= F_f

=>    F  = 172 \ N

       

   

5 0
3 years ago
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