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choli [55]
1 year ago
15

You really have a thing for screaming outside. So on a day where the speed of sound is 343 m/s you go outside and scream at a wa

ll. It takes 0.5 s for you to hear your echo. How far away is the wall that you screamed at?
Physics
1 answer:
OlgaM077 [116]1 year ago
8 0
Speed = Distance/Time
Distance = Speed x Time
343 x 0.5 = 1/2 of 343
343 x 0.5 = 171.5
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Unpolarized light with an intensity of 22.4 ????ux passes through a polarizer whose transmission axis is vertically oriented. (a
irina1246 [14]

Answer:

a)      I₁ = 11.2 Lux , vertical direction , b)      I₂ = 1.44 Lux

Explanation:

a) A polarized is a system that absorbs light that is not polarized in the direction of its axis, therefore half of the non-polarized light must be absorbed

consequently the above the processed light has half of the incident intensity and the directional of the polarized

          I₁ = I₀ / 2

          I₁ = 22.4 / 2

          I₁ = 11.2 Lux

is polarized in the vertical direction

b) The polarized light falls on a second polarizer, therefore it must comply with the law of Malus

         I₂ = I₁ cos² θ

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         I₂ = 1.44 Lux

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3 years ago
What is the advantages and disadvantages of 'howe' truss?
Vinvika [58]

Answer:

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6 0
3 years ago
Help pleasee
agasfer [191]

Answer:

i/f = i/o + i/i       f = focal, o = object, i = image

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i = 12.5 * 22 / (12.5 - 22) = -28.9 cm

Image is real

Image is 28.9 cm to left of lens

M = - i / o = = 28.9 / 12.5 = 2.3     magnification (convex lens)

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How does a large star create the elements? at what element does the star stop making new elements?
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Which contains the particles that are vibrating fastest?
Phantasy [73]

Answer:

Boiling water

Explanation:

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