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3 years ago

8

How does a pin hole camera work? And how do we see through them?

2 answers:

DIA [1.3K]3 years ago

6 0

A pinhole camera<span> is a simple </span>camera<span> without a lens but with a tiny aperture, a</span>pinhole<span> – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the </span>camera<span> obscura effect.</span>

maxonik [38]3 years ago

3 0

A pinhole camera<span> is a simple </span>camera<span> without a lens but with a tiny aperture, a </span>pinhole<span> – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the </span>camera<span> obscura effect.

Hope this helps! ^-^</span>

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A torsion-bar spring consists of a prismatic bar, usually of round cross section, that is twisted at one end and held fast at th

ra1l [238]

Answer:

d₁ = 0.29 in

d₂ = 0.505 in

Explanation:

Given:

T = 1500 lbf in

L = 10 in

x = 0.5 L = 5 in

$T_{1} =\frac{T(L-x)}{L} =\frac{1500*(10-5)}{10} =750lbfin$

First case: T = T₁ + T₂

T₂ = T - T₁ = 1500 - 750 = 750 lbf in

If the shafts are in series:

θ = θ₁ + θ₂

θ = ((T₁ * L₁)/GJ) + ((T₂ * L₂)/GJ)

Second case: If d₁ ≠ d₂

θ = ((T₁ * L₁)/GJ₁) + ((T₂ * L₂)/GJ₂) = 0 (eq. 1)

t₁ = t₂

$\frac{16T_{1} }{\pi d_{1}^{3} } =\frac{16T_{2} }{\pi d_{2}^{3} }$ (eq. 2)

T₁ + T₂ = 1500 (eq. 3)

θ₁ first case = θ₁ second case

Replacing:

$\frac{750*5}{G(\frac{\pi }{32})*0.5^{4} } =\frac{T_{1}*3.7 }{G(\frac{\pi }{32})*d_{1} ^{4} }\\T_{1} =16216d_{1} ^{4}$

The same way to θ₂:

$\frac{750*5}{G(\frac{\pi }{32})*0.5^{4} } =\frac{T_{2}*6.3 }{G(\frac{\pi }{32})*d_{2} ^{4} } \\T_{2} =9523.8d_{2} ^{4}$

From equation 2, we have:

d₁ = 0.587 * d₂

From equation 3, we have:

d₂ = 0.505 in

d₁ = 0.29 in

7 0

3 years ago

PLEASE HELP.. ILL GIVE U BRAINLY Do you think that air is made of particles? What evidence do you have to support your claim?

3241004551 [841]

Answer:

yes

Explanation:

I think that air is made of particales because air is made out of gas but it has some particales in the air called aerosols.

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3 years ago

The rotation of earth takes approximately _______ to complete, and the revolution of earth takes approximately _______ to comple

Marysya12 [62]

Answer:

D. 24 hours, 365 days

Explanation:

please mark me brainlist

and this is correct answer

6 0

2 years ago

What would be the answer pls answer ASAP

ELEN [110]

I would say D. 22.25 ml because there’s a curve

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2 years ago

Check My Work (1 remaining) Boron coated with SiC (or Borsic) reinforced aluminum containing aligned 20 vol% fibers is an import

Lubov Fominskaja [6]

Answer:

$E = 12 * 10^{6} Psi$

Explanation:

Modulus of Elasticity perpendicular to the fibre,

$\frac{1}{E} = \frac{B_{B} }{E_{B} } + \frac{B_{Al} }{E_{Al} }$

$B_{B} = 20% = 0.2\\$

$B_{Al} = 80% = 0.8$

$E_{B} =55 * 10^{6} Psi$

$E_{Al} =10 * 10^{6} Psi$

$\frac{1}{E} = \frac{0.2 }{55 * 10^{6} } + \frac{0.8 }{10 *10^{6} }$

$\frac{1}{E} = 8.36 * 10^{-8} \\E = \frac{1}{8.36 * 10^{-8} }\\E = 12 * 10^{6} Psi$

3 0

3 years ago