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igor_vitrenko [27]
3 years ago
9

3. What is the energy of a photon whose frequency is 5.2 x 1015 Hz? Use the equation: E = hxv

Chemistry
1 answer:
anzhelika [568]3 years ago
8 0

Answer:

3. 3.45×10¯¹⁸ J.

4. 1.25×10¹⁵ Hz.

Explanation:

3. Determination of the energy of the photon.

Frequency (v) = 5.2×10¹⁵ Hz

Planck's constant (h) = 6.626×10¯³⁴ Js

Energy (E) =?

The energy of the photon can be obtained by using the following formula:

E = hv

E = 6.626×10¯³⁴ × 5.2×10¹⁵

E = 3.45×10¯¹⁸ J

Thus, the energy of the photon is 3.45×10¯¹⁸ J

4. Determination of the frequency of the radiation.

Wavelength (λ) = 2.4×10¯⁵ cm

Velocity (c) = 3×10⁸ m/s

Frequency (v) =?

Next, we shall convert 2.4×10¯⁵ cm to metre (m). This can be obtained as follow:

100 cm = 1 m

Therefore,

2.4×10¯⁵ cm = 2.4×10¯⁵ cm × 1 m /100 cm

2.4×10¯⁵ cm = 2.4×10¯⁷ m

Thus, 2.4×10¯⁵ cm is equivalent to 2.4×10¯⁷ m

Finally, we shall determine the frequency of the radiation by using the following formula as illustrated below:

Wavelength (λ) = 2.4×10¯⁷ m

Velocity (c) = 3×10⁸ m/s

Frequency (v) =?

v = c / λ

v = 3×10⁸ / 2.4×10¯⁷

v = 1.25×10¹⁵ Hz

Thus, the frequency of the radiation is 1.25×10¹⁵ Hz.

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Suppose on average 2 penguins have 750000 feathers between them, 1 pillow requires 1283 feathers, 3 hippies need 16 pillows tota
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Answer :

The correct answer total bongo required = 4830

Given : 1) 2 penguins gives 750000 feathers

           2)  1 pillow needs 1283 feathers

         3)    3 hippies needs 16 pillows

         4)  8 hippies need 1 treehouse

         5)     1 tree house needs 322 planks

and   6)    1 bongo gives 5 planks

Asked : Bongos needed if   there are 11 penguins.

Following steps can be used to find number of bongos :

Step 1 : Calculate total feathers given by 11 penguins :

2 penguins gives 750000 feathers

1 penguin will give = \frac{750000 feathers}{2 penguins}

Hence , 11 penguins can give = \frac{750000 feathers}{2 penguins} *  11 penguins

Hence total feathers = 4125000 feathers .

Step 2 : To calculate total pillows formed :

1283 feathers  forms 1 pillow

1  feathers will form pillows  = \frac{1 pillow}{1283 feathers }

4125000 feathers will form pillow = \frac{1 pillow}{1283 feathers }  * 4125000 feathers

Total pillow formed = 3215 pillows

Step 3: To find total hippies :

16 pillows is are needed by 3 hippies

1 pillow will be needed by = \frac{3 hippies}{16 pillow}

3215 pillows needed by hippies = \frac{3 hippies}{16 pillows} * 3215 pillows

Total hippies = 603

Step 4 : To find total tree house needed :

8 hippies needs 1 treehouse

1 hippie will need treehouse = \frac{1 treehouse}{8 hippies}

603 hippies need treehouse =  \frac{1 treehouse }{8 hippies} * 603 hippies

Total treehouse needed =  75

Step 5 : To find total planks

1 treehouse needs 322 planks

75 treehouses will need  = 75 * 322 planks

Total planks needed = 24150

Step 6:  To calculate Bongos:

5 planks given by 1 bongo

1 plank given by bongo = \frac{1 bongo}{5 planks}

24150 planks given by bongos = \frac{1 bongo}{5 planks} * 24150 planks

Total bongos needed = 4830

Hence  if 11 penguins are present , bongos needed = 4830 .

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Explanation:

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