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3 years ago

Explain how the organ systems work together to warm up the body on a cold day.

2 answers:

4 0

Sample Response:<span> The brain, through the nervous system, sends signals to the muscular system, causing the muscles to move rapidly. This rapid motion produces heat in the body and is observed as shivering. The brain also sends signals to the muscles right beneath the skin. These muscles shorten and tighten, causing the hairs on the skin to stand up. When the hairs stand up, heat is kept in the air trapped within the hairs, which keeps the body warm.</span>

makkiz [27]3 years ago

4 0

Answer:

The nervous system and the muscular system work together.

Muscles move rapidly to produce heat within the body.

Muscles underneath the skin contract, causing hair on the skin to stand up.

When hairs on skin stand up, they trap the heat coming out of the body so the heat is kept near the body.

Explanation:

e d g e n u i t y 2020

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69. Sequencing Arrange these hydrates in order of

Kobotan [32]

In order of increasing percent water content:CoCl₂.6H₂O, Ba(OH)₂.8H₂O, MgSO₄.7H₂O

<h3>Further explanation</h3>

$\tt \%element=\dfrac{Ar~element}{MW~compound}\times 100\%$

CoCl₂.6H₂O.MW=237.90 g/mol

6H₂O MW = 6.18=108 g/mol

$\tt \%H_2O=\dfrac{108}{237.9}\times 100\%=45.4\%$

MgSO₄.7H₂O.MW=246.48 g/mol

MW 7H₂O = 7.18=126 g/mol

$\tt \%H_2O=\dfrac{126}{246.48}\times 100\%=51.1\%$

Ba(OH)₂.8H₂O MW=315.48 g/mol

MW 8H₂O = 8.18=144 g/mol

$\tt \%H_2O=\dfrac{144}{315.48}\times 100\%=45.6\%$

4 0

2 years ago

Kernels of corn are heated and become popcorn. Why is this a chemical change?

goldfiish [28.3K]

Answer:

When popcorn is popped, liquid inside the kernel is changed to steam. Pressure from the steam builds up inside the kernel. When the pressure reached a critical stage the kernel pops turning itself inside out. This is a physical change.

Explanation:

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2 years ago

Read 2 more answers

_______ particles move very fast and freely.<br><br> A.Gas<br><br> B.Solid<br><br> C.Liquid

inn [45]

The answer is A. Gas particles!

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3 years ago

What is the volume of 1.56 kg of a compound whose molar mass is 81.86 g/mole and whose density is 41.2 g/ml?

hjlf

Answer:

v = 37.9 ml

Explanation:

Given data:

Mass of compound = 1.56 kg

Density = 41.2 g/ml

Volume of compound = ?

Solution:

First of all we will convert the mass into g.

1.56 ×1000 = 1560 g

Formula:

D=m/v

D= density

m=mass

V=volume

v = m/d

v = 1560 g / 41.2 g/ml

v = 37.9 ml

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2 years ago

DATA:

WITCHER [35]

Answer:

Explanation:

trial 1

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3 years ago