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Marizza181 [45]
4 years ago
5

Explain why lenses are used for particular applications. ( please write a long detailed answer )

Physics
1 answer:
STALIN [3.7K]4 years ago
8 0

Answer:

Lenses are very important for us. Without lenses even we can't imagine the world. Without lenses our life is like life without colors.

Explanation:

Lenses are used everywhere around us in car, truck, glass, headlamps etc. It is also present in the flashlight of the LED light that is used in electronic materials.

Our eyes have also most amazing lenses. When you look at ground, at sky, and staring at moon all that happen that because of our binocular lenses. Our eyes have two type of lenses that concave lenses and convex lenses.

By these lenses we can see far and near object6s easily. Thus we used special applications of lenses to see the objects.

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3 years ago
An 18-cm-long bicycle crank arm, with a pedal at one end, is attached to a 20-cm-diameter sprocket, the toothed disk around whic
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Answer:

Part a)

a = 0.056 m/s^2

Part b)

L = 7.85 m

Explanation:

Part a)

Angular speed of the pedal is changing from 60 rpm to 90 rpm in 10 s

so the angular acceleration is given as

\alpha = \frac{\omega_2 - \omega_1}{\Delta t}

so we will have

\alpha = \frac{2\pi(\frac{90}{60}) - 2\pi(\frac{60}{60})}{10}

\alpha = 0.314 rad/s^2

now the tangential acceleration of the pedal is given as

a = r \alpha

a = 0.18 \times 0.314

a = 0.056 m/s^2

Part b)

Total angular displacement made by the sprocket in the interval of 10 s is given as

\theta = \frac{\omega_f + \omega_i}{2} t

\theta = \frac{2\pi (\frac{90}{60}) + 2\pi (\frac{60}{60})}{2}(10)

\theta = 78.5 radian

now length of the chain passing over it is given as

L = R\theta

L = 0.10 \times 78.5

L = 7.85 m

6 0
4 years ago
Change to Kelvin 60 degree Celicius؟
nikitadnepr [17]

Answer:

-213

Explanation:

  1. c=k-273
  2. c=60-273
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3 years ago
Brad has three beakers of water. Each beaker contains 500 mL of water. The temperature of the water in the first beaker is 40°C.
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Explanation:

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3 years ago
How do machines increase mechanical advantage?
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