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lesya692 [45]
2 years ago
5

In which type of echinoderm are tube feet not used for movement? sea star brittle star sea urchin sea cucumber

SAT
1 answer:
tatyana61 [14]2 years ago
7 0

Answer:

<u>brittle star</u>

Explanation:

hi <3

can you give me a brainliest please

I hope I hellpted you

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Its D

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How many moles of neon would be contained in 4.0 l of neon gas at 2 atm and 127oc?
Sergeeva-Olga [200]

If the pressure, volume, and temperature are 202650 Pa, 0.004 cubic meters, and 400.15 K. Then the number of the mole is 0.24 mol.

<h3>What is thermodynamics?</h3>

It is a branch of science that deals with heat and work transfer.

We know that the Ideal gas equation is given as

PV = nRT

Where

P = Pressure (Pa)

V = Volume (in m³)

n = Number of moles (mol)

R = universal gas constant (8.314 J⋅K⁻¹⋅mol⁻¹)

T = temperature (in K)

We have

P = 2 atm = 202.65 × 10³ Pa

V = 4 liters = 0.004 m³

T = 127 °C = 400.15 K

Then we have

Then the number of the mole will be

\rm n = \dfrac{PV}{RT}\\\\\\n = \dfrac{202.65 \times 10^3 \times 0.004}{8.314 \times 400.15}\\\\\\n = \dfrac{810.6}{3326.85}\\\\\\n = 0.24365 \approx 0.24

More about the thermodynamics link is given below.

brainly.com/question/7206767

#SPJ1

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Arrange the missing steps in the correct order. the hypothesis is true. analyze the data. construct a hypothesis. the hypothesis
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During a research work, an effective and efficient way to follow the scientific method includes:

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Analyze the data.

Explain the result.

Communicate the result.

The scientific method is the variety of techniques that scientists use to observe, examine, investigate, and study the natural world and explain it based on evidence, theories, evidence, hypotheses, or factual information that scientists derive from their research work.

It can be defined as the scientific method usually involves combining traditional scientific processes with critical thinking, scientific knowledge, and reasoning to generate new ideas. Please note that if your hypothes is true, it should be shared with the community. However, if your hypothesis is wrong, you should build another hypothesis and repeat the process.

Know more about scientific method here

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