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xxTIMURxx [149]
2 years ago
15

Which description best explains how a Doppler radar system works?

Biology
1 answer:
Eva8 [605]2 years ago
4 0

Answer : (A) "It reflects waves off of objects, measuring the difference of the waves it sends and receives".

Explanation :

In Doppler radar system, radio waves emitted from an antenna. It gives information about the motion of targets and their position.

Phase change between a transmitted wave and received echo is calculated using Doppler radar system.

It also gives radial velocity i.e. velocity in the direction of radar. If the phase shift is positive this means the motion is toward the radar and if the phase is negative this implies the motion is away from the radar.

So, the correct option is (A) "It reflects waves off of objects, measuring the difference of the waves it sends and receives".

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3. The buccal cavity comprises ________,_______and __________.
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The movement of food through the esophagus  is called peristalsis.

<h3>What is the buccal cavity?</h3>

The mouth is what we generally call the buccal cavity. It is an opening that contains the teeth and the tongue. The tongue plays the important role of serving as the organ of taste while the teeth serves to marsh food. It is the white strong structure that occurs in the mouth that enables is to masticate our food. Also in the mouth we have the salivary gland which plays the role of secreting the saliva and we know that the saliva contains from enzymes that makes it possible for the digestion of food to commence at the moth. It the follows that the buccal cavity is made up of the teeth, tongue and salivary glands.

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2 years ago
Increased atmospheric carbon dioxide negatively affects coral reefs by: select one:
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During which period did mammals first appear? A. Pleistocene B. Carboniferous C. Cretaceous D. Jurassic
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3 years ago
Read 2 more answers
If a meal supplies 110 g of carbohydrates, 25 g of protein, 20 g of fat, and the equivalent of 5 g of alcohol, what % of the kca
mars1129 [50]

Answer:

0.058 % kcalories comes from carbohydrate.

Explanation:

1 g of carbohydrtes gives 4 calories, 1 g of protein gives 4 kcalories, 1 gm of fat gives 9 calories and 1 g of alcohol gives 7 calories of energy.

Thus in a meal  that contains 110 g carbohydrates gives 110 x 4 = 440 calories,  25 g protein gives 25 x 4 = 100 calories, 20 g fat gives 20 x 9 = 180 calories and 5 g alcohol gives 5 x 7 =  35 calories.

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In kcalories % would be 58.27/1000 = 0.5827 %  

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3 years ago
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