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Ann [662]
3 years ago
5

Is mixing sand a gravel a physical or chemical change?

Biology
1 answer:
gtnhenbr [62]3 years ago
4 0

Answer:

I believe it's a physical change?

Explanation:

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8 0
3 years ago
A large gradient for sodium exists across a cell membrane. Channels are opened and sodium diffuses freely through the channels.
skelet666 [1.2K]

Answer:

Once the sodium channels opens and sodium is allowed to diffuse freely in and out of the cell, this will cause a large change in entropy and enthalpy. Values for both these quantities will increase significantly, however, the change in free energy will be small when we compare the open and closed state of the sodium channel. With regards to the stability of the system, it will reach equilibrium because the concentration of sodium ions is being allowed to diffuse without any regulation.

Hope that answers the question, have a great day!

8 0
4 years ago
Which level(s) of organization are the main focus of<br><br> Vitor Becker's work?
Olenka [21]

<u>Answer:</u>

<em>Community and ecosystem levels of organization are the main focus areas of Vitor Becker’s work. </em>

<u>Explanation:</u>

<em>Serra Bonita reserve complex was established by Vitor Becker and his wife Clemira Souza in the Atlantic forest of Brazil.</em> He studied agronomy and forestry and has a Ph.D in entomology.

Becker realized that the Atlantic forests are largely destroyed. After retirement Becker and Souza settled in the <em>Serra Bonita mountain region and using their savings they bought land in the region and converted the area into Serra Bonita reserve complex. </em>

3 0
3 years ago
If you had the opportunity to eradicate all diseases, would you?
k0ka [10]
Yes. No cancer and heart disease would save millions of lives.
5 0
3 years ago
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Describe the basic components of<br> DNA (deoxyribonucleic acid).
Reika [66]

Answer:

DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.

Explanation:

8 0
3 years ago
Read 2 more answers
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