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Aneli [31]
3 years ago
12

When the source of a wave is moving relative to an observer of the wave, which of the following is true?

Biology
1 answer:
galina1969 [7]3 years ago
4 0

Answer:

Observers ahead of the wave observe an apparent increase in wave frequency  

Explanation:

This is the Doppler Effect. The frequency of a wave increases when the source approaches the observer and decreases as the source recedes.

B, C, and D are wrong. Observers behind the source notice a decrease in frequency.

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The solutions in the two arms of a U-tube are separated by a membrane that is
IgorC [24]

Answer:

See the answer below

Explanation:

Recall that: <em>Water potential = pressure potential + solute potential</em>

Since the system is an open one;

<em>Water potential = solute potential = -iCRT</em>

i = number of particles the molecle will make in water (1)

C = molar concentration

R = Pressure constant = 0.0831 liter bar/mole K

T = temperature in kelvin = 22 + 273 = 295 K

To calculate water potential on side A:

C = 1 M

Water potential = - (1 x 1 x 0.0831 x 295) = -24.51 bars

For side B:

C = 2 M

Water potential = - (1 x 2 x 0.0831 x 295) = -49.03 bars

b.

<em>Since side A has higher water potential than side B, water will flow from side A to side B until equilibrium is established between the two sides. Water always flows from the region of higher water potential to the region of lower water potential.</em>

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6 0
2 years ago
These are the organic compounds that your body needs for normal metabolic processes?
Hitman42 [59]

Answer:

There are Five main compounds but our body need carbohydrate and protein more.

Explanation:

There are five major organic compounds that our body needs for normal metabolic processes. These are- Carbohydrates, lipids, proteins, nucleic acids and high energy compounds. organic compounds are involved in almost all biochemical activities that is related to metabolism. The organic compounds always contain carbon.  Carbs act as the source of energy to the body. They converted to glucose, which used in cellular respiration. Lipids act as  fatty acids. Proteins have a structural function like keratin in skin and hair. Nucleic acids are large organic compounds that store and process information at the molecular level inside the body cells. High energy compounds like ATP serves as a source of cellular energy.

4 0
3 years ago
Green sea turtles eat sea grass that grows on the sea floor. Seagrass, a foundation species, provides an important breeding grou
mihalych1998 [28]

Answer:

D)

Explanation:

Turtles eat the grass, grass is needed for fish breeding. If there are more turtles, they will eat more grass and there will obvious be less of it. If there is not enough grass, other populations of fish will leave because they can't breed.

3 0
3 years ago
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Round depressions on the moon’s surface are called _____. highlands craters maria meteorites
Nonamiya [84]

Answer:

Craters

Explanation:

I promise its right

5 0
3 years ago
Which structures protect the cell? Check all that apply.
Komok [63]

Answer:

Golgi body

cell wall

ribosome

nucleus

Explanation:

6 0
2 years ago
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