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3 years ago

Which of the following best describes how wireless telephones are able to receive and produce sound from one person to another?

Chemistry

1 answer:

alina1380 [7]3 years ago

8 0

Electromagnetic waves are received and then vibrate a speaker which produces sound waves.

Explanation:

The telephone has a receiver-transducer component that can receive electromagnetic wave - radio waves spectrum- and transform them into electric energy. This electric energy is then transformed into sound energy by a speaker. This is how we're able to listen to a phone call.

The opposite happens when we speak on the phone. The sound energy is transformed into electric energy by a microphone – the reverse of a speaker. The transducer now changes the electric energy into electromagnetic waves that travel through space to the recipient in the phone conversation.

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3. Gasoline, coal, batteries, and logs all have chemical energy. When they burn that chemical energy will be transformed into en

Arturiano [62]

Answer:

Thermal energy

Explanation:

When gasoline, coal, batteries and logs are all burn they transform chemical energy to thermal energy.

The chemical energy is the energy held between chemical chains and bonds within an atom.

When they combust, they release thermal energy
Chemical energy is a potential energy.
The thermal energy is a kinetic energy
It increase the average motion of the particles in the medium
The breaking bond when produces heat which is a form of thermal energy.

3 0

3 years ago

What statement is true about the eight elements on the periodic table termed metalloids?

valina [46]

Answer:

They have properties of both metals and nonmetals

Explanation:

Elements in the periodic table may be divided into Metals, non-metals, and metalloids.
Metals are the elements that react by losing electrons to form stable positively charged ions known as cations. Examples are group 1, 2, and 3 elements together with transition elements.
Non-metals are those elements that react by gaining electrons to form stable negatively charged ions called anions. Examples include oxygen, carbon, sulfur, etc.
Metalloids, on the other hand, are elements that have both metallic and non-metallic properties.
Metalloids occur between metals and non-metals in the periodic table. Examples include Boron and silicon among others.

6 0

3 years ago

Which of the following is formed when an acid reacts with a base? Alkaline Hydrogen ion Hydroxide ion Salt

AlexFokin [52]

Salt (not table salt!) is formed when an acid reacts with a base. Salt is a compound. Water is also produced as a by-product of this reaction.

3 0

3 years ago

Read 2 more answers

A hot air balloon is filled with 1.31 × 10 6 L of an ideal gas on a cool morning ( 11 ∘ C ) . The air is heated to 121 ∘ C . Wha

victus00 [196]

Answer:

$1.82\times 10^6 L$ is the volume of the air in the balloon after it is heated.

Explanation:

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$ (at constant pressure)

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1= 1.31\times 10^6 L\\T_1=11^oC=(11+273.15)K=284.15K\\V_2=?\\T_2=121^oC=(121+273.15)K=394.15 K$

Putting values in above equation, we get:

$\frac{1.31\times 10^6 L}{284.15 K}=\frac{V_2}{394.14 K}\\\\V_2=\frac{V_1\times T_2}{T_1}$

$V_2=1.82\times 10^6 L$

$1.82\times 10^6 L$ is the volume of the air in the balloon after it is heated.

4 0

3 years ago

Name the feature of the ocean floor shown at A and describe how it’s formed.

shusha [124]

Answer:

Scientists found that seams formed mountain ranges that ran along the middle of some ocean floors. Scientists found that mid ocean ridges extend into all of earth's oceans and that a steep sided valley splits the tops of some mid ocean ridges.

Explanation:

5 0

3 years ago