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sergiy2304 [10]
4 years ago
10

Cellular telephone use

Physics
2 answers:
german4 years ago
7 0

Answer:

1.c 2.b 3.d

Explanation:

i just took and got these all right

m_a_m_a [10]4 years ago
5 0
A- Radio waves, is the answer
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Disorder in the universe increases because
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3 years ago
Red light has a longer wavelength and higher energy than blue light. True or False
Bingel [31]

Answer:

False

Explanation:

Visible light is composed of radiation of wavelengths between 400 and 700 nm. The sensitivity of the human eye depends on the wavelength and has a maximum at 550 nm. Some people are able to perceive from 380 to 780 nm.

The electromagnetic energy in a particular wavelength λ (in a vacuum) has an associated frequency f and a photonic energy E. Thus, the electromagnetic spectrum can be expressed in terms of any of these three variables, which are related by equations.

Thus, high frequency electromagnetic waves have a short wavelength and high energy; Low frequency waves have a long wavelength and low energy.

To calculate the energy of a photon the Planck formula is used is E = h · v, where E is the energy, h the Planck constant and v the frequency (Hz or s-1).  Where the frequency f is equal to the speed of the wave, divided by the wavelength λ .

That said we can say that it is false because although the red light has a longer wavelength than the blue one, in turn it has a lower energy than the blue light.

8 0
4 years ago
Other than temperature, which property also has an effect on the rates of chemical reactions?
PSYCHO15rus [73]

Other than temperature, the property that also has an effect on the rates of chemical reactions is the concentration of the reactants. The correct answer is B

The rate of chemical reaction means how chemical react with respect to time or as a function of time. The rate of chemical reaction tells us the speed or how fast chemicals react.

There are many factors that can affect the rate of chemical reaction. Temperature is one of them. Increase in temperature will increase the rate at which chemical react.

The color of reactants, solubility of reactants and volume of reactants have nothing to do with the rate of chemical reaction.

Other than temperature, the property that also has an effect on the rates of chemical reactions is the concentration of the reactants.

Other factors affecting the rate of chemical reaction are:

  • the physical state of the reactants
  • surface area
  • temperature
  • and the presence of a catalyst

Therefore, the correct answer is option B

Learn more about chemical reaction here: brainly.com/question/11231920?source=archive

8 0
3 years ago
What are two components that make up force?
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The answer is mass and acceleration
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