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Simora [160]
3 years ago
8

g stAn experienced spear fisherman sees a small fish swimming in a tidal pool. If the fisherman sees the fish at approximately a

40o angle (measured from vertical), he knows that he must release his spear at what angle
Physics
1 answer:
Luba_88 [7]3 years ago
5 0

Answer:

  θ = 28.9

Explanation:

For this exercise let's use the law of refraction

          n₁ sin θ₁ = n₂ sin θ₂

where we use index 1 for air and index 2 for water where the fish is

        sin θ₂ = n₁ / n₂ sin θ₁

in this case the air repair index is 1 and the water 1.33

we substitute

        sin θ₂ = 1 / 1.33 sin t 40

        sin θ = 0.4833

         

        θ = sin⁻¹ 0.4833

        θ = 28.9

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Answer and Explanation:

Given data:

The electric field is

E

=

1000

N

/

C

The initial kinetic energy of the ejected electrons is

k

=

3

e

V

=

(

3

×

1.6

×

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−

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)

J

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p

k

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V

Here

U

p

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V

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Here

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=

E

d

is the electric potential in electric field

Here

e

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1.6

×

10

−

19

C

is the charge of the electon

Substituting the values in the above equation as,

k

=

q

V

k

=

e

(

E

d

)

(

3

×

1.6

×

10

−

19

J

)

=

(

1.6

×

10

−

19

C

)

(

1000

N

/

C

)

×

d

d

=

0.003

m

d

=

3

m

m

Explanation:

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