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Mila [183]
3 years ago
10

Una lente forma una imagen de un objeto, el cual está a 16.0 cm de la lente. La imagen está a 12.0 cm de la lente del mismo lado

que el objeto. a) ¿Cuál es la distancia focal de la lente?¿esta es convergente o divergente? b) Si el objeto tiene 8.50 mm de altura, ¿cuál será la altura de la imagen? ¿es derecha o invertida?
Physics
1 answer:
Lubov Fominskaja [6]3 years ago
8 0

Answer:

The focal length of the lens is -6.85 cm.

The lens is diverging lens.

The height of the image is 6.4 mm.

Explanation:

Given that,

Object distance = 16.0 cm

Image distance = 12.0 cm

Height of object = 8.50 mm

We need to calculate the focal length of the lens

Using formula of lens

\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}

Where, v = image distance

u = object distance

Put the value into the formula

\dfrac{1}{f}=\dfrac{1}{-12}+\dfrac{1}{-16}

\dfrac{1}{f}=-\dfrac{7}{48}

f=-6.85\ cm

Focal length is negative so the lens will be diverging lens.

We need to calculate the height of the image

Using formula of magnification

m=\dfrac{v}{u}=\dfrac{h'}{h}

Put the value into the formula

\dfrac{12}{16}=\dfrac{h'}{8.50\times0.1}

h'=\dfrac{12}{16}\times8.50\times0.1

h'=0.64\ cm

h'=6.4\ mm

Hence, The focal length of the lens is -6.85 cm.

The lens is diverging lens.

The height of the image is 6.4 mm and straight.

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scoundrel [369]

Answer:

the light emitting must be of greater wavelength

Explanation:

For this exercise we must use the Planck equation

             E = h f

And the speed of light

            c = λ f

            f = c / λ

We replace

            E = h c / λ

The wavelength of the green light is of the order of 500 nm, let's calculate the energy

          E = 6.63 10⁻³⁴  3 10⁸ /λ

          E = 1,989 10⁻²⁵ /λ

          λ = 500 nm = 500 10⁻⁹ m

          E = 1,989 10⁻²⁵ / 500 10⁻⁹

          E = 3,978 10⁻¹⁹ J

That is the energy of the transition for a transition is an intermediate state the energy must be less, this implies that the wavelength must increase. For the explicit case of a state with half of this energy

            E_{int} = E / 2

             E_{int} = 3,978 10⁻¹⁹ / 2 = 1,989 10⁻¹⁹

Let's clear and calculate

           λ = h c / E

           λ = 1,989 10⁻²⁵ / 1,989 10⁻¹⁹

           λ = 1 10⁻⁶ m

Let's reduce to nm

          λ = 1000 nm

This wavelength is in the infrared region

the light emitting must be of greater wavelength

8 0
3 years ago
The jumping gait of the kangaroo is efficient because energy is stored in the stretch of stout tendons in the legs; the kangaroo
Anna [14]

Answer:

the period T of whole motion should be twice the value for half at he bottom so T is 0.2sec.

w is angular frequency

formula:2π/T

now k is spring constant

F/R-->mw²

putting values:70*(2π/0.2)²

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what is the property of an object due to its mass by which it resists any change in its position unless overcome by force ?
UkoKoshka [18]

Answer:

Mass as a Measure of the Amount of Inertia

All objects resist changes in their state of motion. All objects have this tendency - they have inertia.

Explanation:

hope this helps

5 0
3 years ago
Which type of energy is released when a bond between atoms is broken
Murrr4er [49]

Answer: gases

Explanation: because gases move around freely and they would be the only one to make sense because solid are compacted together and liquid are not so fast at moving but gases are wild                                          

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4 0
3 years ago
Karen runs sets in basketball practice. She starts from a line runs 2.0 m, returns to the line, runs 4.0 m, to the line, runs 6.
Aleonysh [2.5K]

D. distance = 23 m, displacement = + 1 m

Explanation:

Let's remind the difference between distance and displacement:

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- displacement is a vector connecting the starting point and the final point of a motion, so its magnitude is given by the length of this vector, and its direction is given by the direction of this vector.

In this case, the distance covered by Karen is given by the sum of all its movements:

distance = 2.0 m + 2.0 m+4.0 m+4.0 m +6.0 + 5.0 m=23.0 m

The displacement instead is given by the difference between the final point (1.0 m in front of the starting line) and the starting point (the starting line, 0 m):

displacement = +1.0 m-0 m=+1 m

8 0
3 years ago
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