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IgorC [24]
3 years ago
8

Identify why many compounds dissolve in water

Biology
2 answers:
alina1380 [7]3 years ago
6 0

Answer:

water is something that human beings must not play with, because it's something dangerous so it can dissolve people.

Nimfa-mama [501]3 years ago
5 0

Answer:

Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. Water molecules have a polar arrangement of oxygen and hydrogen atoms one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.

Explanation:

Hope it helps you

Mark my answer as brainlist

have a nice day

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Give the sequence of DNA that would match the following DNA strand
creativ13 [48]

Answer:

GATCCGGTAT

Explanation:

A = T, G = C

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2 years ago
Millions of years ago, the Sierra Nevada region began to be uplifted along a crack in Earth's crust. The region on the other sid
BabaBlast [244]
D. Fold mountain that appeared wavy I think but just in case check an other answer
7 0
3 years ago
I REALLY DO NEED HELP PLEASE!
Lena [83]

Part (a)

Enter the data into your calculator or a spreadsheet. Then perform an exponential regression to find the curve of best fit. This is the closest exponential function we can assign to each population, to measure it's approximate growth.

Let functions f, g and h represent group 1 through 3 in that exact order. You should get these approximate functions:

  • f(x) = 6830.52397(0.92755)^x
  • g(x) = 3969.81548(1.00295)^x
  • h(x) = 5.67328(1.42775)^x

Note: Group 3 doesn't have its population start until 1995, which is 10 years after 1985. This means h(x) only works when x \ge 10 or it's meaningless otherwise.

Each function found is of the form y = a*b^x, where 'a' is the initial population (at time x = 0) and b helps determine the growth rate. We set b equal to 1+r and solve for r to get the growth rate.

For f(x), we have b = 0.92755 approximately. Set that equal to 1+r and solve for r

1+r = 0.92755

r = 0.92755-1

r = -0.07245

The negative growth rate indicates we have population decline. Specifically, the rate of decline is about 7.245%

Repeat those steps for the b value of g(x) and you should find that r = 0.00295 meaning we have roughly a 0.295% increase for Mussel group 2.

Group 3 has a growth rate of about 42.775% due to r = 0.42775 in this case. The steps will be the same as for group 1.

=========================================================

Part (b)

The graph is shown below as an image attachment. I used GeoGebra to make the graph, and to also find the exponential regression equations.

We have x as the number of years since 1985, which is the starting point, and y is the population size. Something like (0,4800) means in the year 1985, the population is 4800 mussels (see group 1).

Keep in mind that the green curve for h(x) doesn't make sense for positive x values smaller than 10, due to the fact that the third group wasn't introduced until 10 years after the starting point of 1985.

Also, be sure not to think that the blue g(x) curve is linear. It looks like a flat line, but it's really a very stretched out curve. This is because the growth rate is very small.

=========================================================

Part (c)

It appears that group 3 has caused group 1's population to decline, due to the red points (see part b) going downhill as we move from left to right. This drop-off occurs at around the time group 3 is introduced. Strangely, only group 1 is affected while group 2's population is still increasing. This increase is not much, but it's still a positive growth rate. So it's fairly likely that there are other confounding variables to consider, and it's not entirely group 3 that's causing the trouble.

=========================================================

Part (d)

There are many ways that people impact their environment, whether it's a positive or negative impact. When regarding this topic of marine life, specifically mussels, one way that humans affect the population is what was mentioned earlier: The fact that the third group of mussels was introduced to the habitat. Often, though not always, if you introduce a new species to some environment, then the species of animals already living there may have a hard time coping with the newcomer. The new species would be referred to as "an invasive species". The invasive species is more aggressive at getting food to crowd out the older species that isn't used to the newcomer. This may explain why Mussel group 1 experiences a decline after 1995 when group 3 is introduced. This decline is fairly significant as the graph in part (b) shows.  Group 2 doesn't seem to be affected at all since it's growth rate is fairly flat yet steadily increasing even if done slowly. It's possible that group 2 is simply more adapted to deal with competition better than group 1.

Another way humans impact the environment is through pollution. Air pollution may contribute to acid rainfall that would lead to the ocean. There's also chemical pollution such as flushing harmful chemicals down the drain, which also leads to the ocean. This could apply to the average consumer, or to very big industrial companies. For instance, in the news recently in Florida, there was a very big worry that a holding pond could contribute to a spike in algae growth. While algae are beneficial, there are some species that invade more than their fair share of resources and kill off anything else more or less. This is one example where pollution contributes to harmful consequences to unfortunate species who likely die off. On top of pollution, there's general habitat loss that also may explain why group 1 is experiencing a sharp decline (however it wouldn't explain why groups 2 and 3 are growing).

8 0
2 years ago
The law of superposition states that in horizontal rock layers, the oldest layers are at the bottom. Which statements
Anastaziya [24]

Answer:

It describes the order of rock layers.

It is a statement of fact.

Explanation:

Law is a statement that is found to be true and acquire from a number of experiments, while theory is gain from assumptions not through experimentation. Layers of soil never change their place with the passage of time. The oldest layer remains below at the end while the new layer is found on the surface of soil. It is a statement of fact because it is proved from experimentation. It never changes as the advancement of technology occurs.

3 0
2 years ago
The brain operates on two levels. one of these is the _____ level.
n200080 [17]
One level is, Awarness
And the second is Unconcious/Subcontious
Hope this is helpfull
6 0
2 years ago
Read 2 more answers
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