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alexira [117]
3 years ago
11

The angle between incident ray and reflected ray is 130.what is the value of angle of incidence​

Physics
2 answers:
Artyom0805 [142]3 years ago
7 0

Answer:

65

Explanation:

as i = r , so i + i = 130

so , i = 130/2 =65

lana [24]3 years ago
4 0

Answer:

please find attached file

Explanation:

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Alika [10]

For this case, let's assume that the pot spends exactly half of its time going up, and half going down, i.e. it is visible upward for 0.245 s and downward for 0.245 s. Let us take the bottom of the window to be zero on a vertical axis pointing upward. All calculations will be made in reference to this coordinate system. <span>

An initial condition has been supplied by the problem: 

s=1.80m when t=0.245s 

<span>This means that it takes the pot 0.245 seconds to travel upward 1.8m. Knowing that the gravitational acceleration acts downward constantly at 9.81m/s^2, and based on this information we can use the formula:

s=(v)(t)+(1/2)(a)(t^2) 

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(1.8m)=(v)(0.245s)+(1/2)(-9.81m/s^2)(0.245s)^2 

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<span>Now we know the initial velocity of the pot right when it enters the view of the window. We know that at the apex of its flight, the pot's velocity will be v=0, and using this piece of information we can use the kinematic equation:

(v final)=(v initial)+(a)(t) 

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0=(v)+(a)(t) 

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t=0.8714s 

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s=3.725m<span>

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3.725m – 1.8m=1.925m</span>

 

Answer:

<span>1.925m</span>

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Explanation:

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