3 years ago

1. What are vaccines and why are they important for people's health

Physics

1 answer:

Evgen [1.6K]3 years ago

8 0

To help fight off disease and viruses

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What magnification will be produced by a lens of power –4.00 D (such as might be used to correct myopia) if an object is held 43

kiruha [24]

Answer:

The magnification is $m = 0.3674$

Explanation:

From the question we are told that

The power of the lens is $P = -4.00 D(dioptre)$

Generally $1 dioptre = 1 \ meter$

The object distance is $u = -43 \ cm$ the negative sign is because the distance is measured in the opposite direction of incident light (i.e away )

Generally the focal length is mathematically represented as

$f = \frac{1}{P}$

=> $f = \frac{1}{4.00 }$

=> $f = 0.25 \ m$

converting to cm

=> $f = 0.25 \ m = 0.25 * 100 = 25 \ cm$

Generally from lens equation we have that

$\frac{1}{f} +\frac{1}{v} -\frac{1}{u}$

=> $\frac{1}{25} +\frac{1}{v} -\frac{1}{-43}$

=> $v = -15.8 \ cm$

Generally the magnification is mathematically represented as

$m = \frac{v}{u}$

=> $m = \frac{- 15.8}{-43}$

=> $m = 0.3674$

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2 years ago

Which of the following is not an example of kinetic energy being converted to potential energy?

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Central maximum = d* wavelength/ D
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D = 1.79*10-^4 m

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Select the correct answer. The police force in a particular city have to catch a serial killer who is on the loose. However, the

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2 years ago

1. What are vaccines and why are they important for people's health​

1. What are vaccines and why are they important for people's health