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blsea [12.9K]
3 years ago
8

What type of modulation is typically used by broadcasting stations to transmit pictures on television screens?

Physics
2 answers:
umka21 [38]3 years ago
4 0
Analog

Television transmitters use one of two different technologies: analog, in which the picture and sound are transmitted by analog signals modulated onto the radio carrier wave, and digital in which the picture and sound are transmitted by digital signals.
Naddika [18.5K]3 years ago
4 0

Answer:

A. Amplitude

Explanation:

The type of modulation that is typically used by broadcasting stations to transmit pictures on television screens is amplitude. Therefore, the answer to your question is A.

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An electric iron is used to remove wrinkles from clothing. The electric iron is made of metal. Which property of this substance
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Answer:

d

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3 years ago
Which of the following involve an increase in the entropy of the system under consideration? a. melting of a solid b. evaporatio
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Explanation:

Since, entropy is the measure of degree of randomness. So, more randomly the molecules of a substance are moving more will be its entropy.

  • For example, when a solid melts then it means heat is absorbed by it due to which its molecules have gained energy. As a result, they collide with each other and hence, entropy will increase.
  • Evaporation of a liquid will also cause the liquid to change its state from liquid to gas. This means molecules will go far away from each other leading to an increase in the entropy.
  • Sublimation is a process of conversion of a solid into gaseous phase without going through liquid phase. So, in this case also entropy will increase due to gain in energy by the molecules of a solid.
  • In freezing, molecules of a substance come closer to each other and acquire less energy. Hence, entropy decreases.
  • Mixing is a process of combining two or more substances physically with each other. This leads to increase in entropy of a substance.
  • In separation molecules are separated from each other leading to a decrease in energy. Hence, entropy will also decrease.
  • Diffusion is a process in which molecules are able to rapidly move from one place to another. Hence, entropy increases when diffusion takes place.

Thus, we can conclude that melting of a solid, evaporation of a liquid, sublimation, mixing and diffusion involve an increase in the entropy of the system under consideration.

8 0
3 years ago
None of these make sense someone help
vfiekz [6]

I would say B because the rest of them are false.

Because Saturn is made of gas

Saturn is smaller than Jupiter

And it takes 29 years for Saturn to orbit the sun

Hope This Helps!     Have A Nice Day!!

6 0
3 years ago
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The energy from our sun is produced by _____.
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█ Answer <span>█

</span><span>The energy from our sun is produced by fusion of hydrogen. 

Choice D is the answer. 

</span><span>Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia 
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3 years ago
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