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Fofino [41]
2 years ago
8

Why do we have a long waves and short waves

Geography
2 answers:
Elenna [48]2 years ago
6 0

These phrases, which refer to the radio wavelength employed, are used in radio communications. There is no actual formal definition of longwave, however they are low frequency radio waves that are often below 540 kHz.

These low frequency radio waves travel across the earth via ground waves and may be picked up practically everywhere. On the other hand, shortwave radios encompass the spectrum from long or medium wave up to microwave frequencies and are higher frequency (hence shorter wavelength). Medium frequencies (HF) are a combination of ground and sky wave and may be received at medium to long ranges. Higher frequencies (VHF and UHF) are mostly short range sky wave propagation.

Allisa [31]2 years ago
5 0

Answer:

If we vibrated the rope rapidly then a short wave was created and if we vibrated the rope less frequently not as often but a long rope was created.

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F
k0ka [10]

A. Convicts


The reason why convicts is the correct answer is because people were at first sent to Australia with the sole reason of serving their sentence there. For that reason, a great proportion of people at the time were simply convicts. 



5 0
3 years ago
Read 2 more answers
5. Describe the three types of magma. Include the silica content and explosivity
777dan777 [17]

Answer:

Basaltic magma --  SiO2 45-55 wt%, high in Fe, Mg, Ca, low in K, Na

Andesitic magma --  SiO2 55-65 wt%, intermediate. in Fe, Mg, Ca, Na, K

Rhyolitic magma --  SiO2 65-75%, low in Fe, Mg, Ca, high in K, Na

Explanation:

8 0
3 years ago
Do any of you have any idea what it’s asking ??
PilotLPTM [1.2K]

Answer:

It is asking what type of environment was the rock formed in. For example, metamorphic rock and sedimentary rocks are formed at different levels of temperature and pressure. To solve the problem start off with trying to identify the type of rock (igneous,metamorphic, sedimentary,etc.) and then figure out what conditions those rocks form in. I hope this helps! Good luck!

3 0
3 years ago
What physical features are the five largest cities in the u.S. Near?
guajiro [1.7K]

Answer:

Five largest cities in the US

1. Alabama

2. Alaska

3. Arizona

4. Arkansas

5. California

Explanation:

Physical features of these cities

1. Alabama: Montgomery is the state capital and site of many landmark civil rights events, like the Montgomery bus boycotts throughout 1955 and 1956 and the Selma-to-Montgomery March for voting rights in 1965.

The nation’s oldest baseball field, Rickwood Field, which opened in 1910, is located in Birmingham.

2. Arizona: Phoenix is the most populous state capital with approximately 1.5 million people living there. According to the National Climatic Data Center, the sun shines on Phoenix for 85 percent of its daylight hours.

3. Arkansas: Little Rock became the capital of the territory of Arkansas in 1821. The name “little rock” comes from the French explorer Bernard de la Harpe. In 1722, he saw rock formations jutting out from the Ouachita Mountains and named one group the big rock and the other the little rock.

4. California: this is the third largest city in the United States. California boasts mountains that are visible from just about anywhere in the state. Two main mountain ranges dominate: the Sierra Nevada and the Coast Range. The Coast Range runs from the northwest all the way down to the Mexican border, across 800 miles of terrain.

4 0
4 years ago
The remains of sea organisms are converted to which type of fossil fuel?.
omeli [17]

Petroleum is a very important part of our day to day life now. We use it almost every day and it has helped emerge the world of vehicles.

<h3>Remains of sea organism</h3>

The remains of ancient marine organisms and sea organisms are used to extract crude oil or petroleum which serve as a fuel for vehicles. These organisms are ancient marine plants, algae and bacteria.

Therefore it can be concluded that the type of fossil fuel in which the remains of sea organisms are converted to is petroleum or crude oil.

Learn more about fossil fuel here:

brainly.com/question/2029072

7 0
2 years ago
Read 2 more answers
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