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2 years ago

In nature, atoms typically form molecules and are usually never in isolation

2 answers:

7 0

True. A good example of this is oxygen, which is found in nature as O subscript(the little number) 2. They can break and creates molecules that are compounds, for example H subscript 2 O.

Readme [11.4K]2 years ago

4 0

Answer:

True

Explanation:

- When atoms combine by forming covalent bonds, the resulting collection of atoms is called a molecule.

- Atoms are made up of electrons, neutrons, and protons. Due to the charges in the atom, that is how the atom stays together, by attraction of the electric charges present in the atom.

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Which structure of the neuron is responsible for the quick transmission of a nerve impulse?

melamori03 [73]

The electrical impulse travels across the axon, and the myelin sheath helps to increase transmission speed.

7 0

3 years ago

The Champaign-Urbana area has long been suffering from the heinous pathogenic bacterium, Michiganious wolverinous, which causes

Nadusha1986 [10]

Answer:

The correct answer is option a, that is, 3000 cases.

Explanation:

The measurement of all the individuals getting influenced by the disease at a specific time is known as the prevalence. On the other hand, the measurement of the number of novel individuals that came into contact with a disease during a specific time duration is known as the incidence.

Based on the given question, the number of prevailing cases carried from 2018 to 2019 is 2000, and the new diseases recorded in the year 2019 is 1000 (incidence). Therefore, the prevalence of the disease in 2020 will be 3000 cases.

6 0

3 years ago

The proportions of the bases are consistent within a species; however they do vary between species. Using the base-pair rules, c

Snezhnost [94]

Answer:

The correct answer would be:

A G C T

Human: 31 19 19 31

Cow: 28 22 22 28

Salmon: 29 21 21 29

Wheat 27 23 23 27

Yeast 31 19 19 31

Explanation:

According to the rule of Chargaff which states or explains the amount of the A, T, G, and C bases in the DNA molecule. It says that the DNA of any organism should have a pyrimidine and purine ratio of 1:1. This means the amount of A would be equal to T and the amount G should be equal to the amount of C.

It also says that the amount of a and G would be equal to the amount of C and T. So on the base of this we can find the missing value in the table:

A G C T

Human: 31 19 19 31 (A= T and G=C)

Cow: 28 22 22 28 (A= T and G=C)

Salmon: 29 21 21 29 (A= T and G=C)

Wheat 27 23 23 27 (100 - A+T = G+C)

Yeast 31 19 19 31 (A= T and G=C)

5 0

2 years ago

Two students are given cubic boxes, measuring 10 cm on a side. Robert puts a single glass marble with a

Katyanochek1 [597]

Answer:

Both boxes have the same amount of empty space

Explanation:

Given

Cube Box

$Length = 10cm$

Robert:

1 glass marble

$Diameter = 10cm$

Susan:

1000 glass marble

$Diameter = 1cm$

Required

Whose box has more empty space?

First, we need to calculate the volume of the cubic box.

$Volume = Length^3$

Substitute 10cm for Length

$Volume = 10^3$

$Volume = 1000cm^3$

Next, calculate the volume of Robert's glass

Volume is calculated as:

$Volume = \frac{4}{3}\pi r^3$ ---- Volume of a sphere

Where

r = radius

$r = \frac{1}{2} * Diameter$

$Diameter = 10cm$ --- Given

Substitute 10 for diameter

$r = \frac{1}{2} * 10cm$

$r = 5cm$

So:

$Volume = \frac{4}{3}\pi r^3$

$Volume = \frac{4}{3} * \frac{22}{7} * 5^3$

$Volume = \frac{4}{3} * \frac{22}{7} * 125$

$Volume = 523.8cm^3$

Next, we determine the volume of Susan's 1000 glasses

Volume is calculated as:

$Volume = \frac{4}{3}\pi r^3$ ---- Volume of a sphere

Where

r = radius

$r = \frac{1}{2} * Diameter$

$Diameter = 1cm$ --- Given

Substitute 1cm for diameter

$r = \frac{1}{2} * 1cm$

$r = 0.5cm$

Substitute 0.5cm for radius in $Volume = \frac{4}{3}\pi r^3$

$Volume = \frac{4}{3} * \frac{22}{7} * 0.5^3$

$Volume = \frac{4}{3} * \frac{22}{7} * 0.125$

$Volume = 0.5238$

But there are 1000 glasses.

So, the volume of 1000 glasses is:

$Volume = 0.5238 * 1000$

$Volume = 523.8cm^3$

--------------------------------------------------------------------------------------------------------------

For Robert:

$Volume = 523.8cm^3$

For Susan:

$Volume = 523.8cm^3$

Since, they have the same volume.

Both boxes have the same amount of empty space

5 0

2 years ago

URGENT: Why does an increase in carbon dioxide increase the quantity of hydrogen ions in blood?

Effectus [21]

Answer the more carbonic acid in the blood, the lower the pH level is. The amount of carbon dioxide removed from the blood messes with the pH level of the blood. this increases the amount of hydrogen ion concentration in blood and it decreases the blood pH levels

Explanation:

8 0

3 years ago