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Molodets [167]
3 years ago
13

two plane mirrors inclined at an angle of 50 degree to each othe r a ray is incident on mirror1 then thedeviation x of ray after

two reflections is
Physics
1 answer:
Kipish [7]3 years ago
6 0

The collapsed answer of Penchalreddy Badepalli is correct. The composition of two reflections via two mirror making an angle \alpha is equivalent to a single rotation by an angle 2\alpha, hence 2 * 60 deg = 120 deg. And turns is independent of the absolute orientation of the two mirrors in space and/or the direction of incidence of the incoming ray.

One could use elementary geometry to prove this (if you presume the direction of incidence is irrelevant imagine hitting the first mirror at 90 deg, then going retro right back along the normal to the first mirror, and follow the directions).

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The following are secondary sources of energy except a.coal b crude oil c nuclear d wind e wood
monitta

Answer:

d) Wind

Explanation:

Secondary energy is energy produced by converting energy available in its natural state in the environment. Hence Wind is a primary source not a secondary source

8 0
2 years ago
ASK YOUR TEACHER A baseball with a mass of 146 g is thrown horizontally with a speed of 40.6 m/s (91 mi/h) at a bat. The ball is
RideAnS [48]

Answer:

Explanation:

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time of impact = 1.05 ms = 1.05 / 1000 = 0.00105 s

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F = m (v - u) / t = 0.146 kg ( -45.1 -40.6) / 0.00105 s = -11916.4 N

4 0
3 years ago
If a resistor draws 1.2 x 10^-3 a of current from a 12 v battery, then what is the value of the resistor?
bixtya [17]
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8 0
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On a cold day, snakes usually lie very still and eat little or nothing while birds usually move around and eat a lot of food. Wh
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5 0
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A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machi
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8 0
3 years ago
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