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3 years ago

Connects the arteries to the veins.

Chemistry

1 answer:

Nitella [24]3 years ago

7 0

Answer:

D, capillaries

Explanation:

Capillaries connect the two.

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The density of mercury (the element) is 13.69 g/cm3. The density of Mercury (the planet) is 5.43 g/cm3. If Mercury (the planet)

Annette [7]

Answer:

The diameter of Mercury would be 0.735 times smaller than the actual diameter i.e., it would become 3590 km from 4879 km

Explanation:

For the sake of simplicity, let us consider Mercury spherical and uniform. The provided data shows that if the Mercury planet is purely composed of mercury then it will require less space as compared to the actual planet, due to the higher density of the mercury. The ratio of the two densities shows that the volume of Mercury would reduce 2.52 times. From the change in volume we can determine the change in diameter by taking the ratio of initial and final states, shown in the following derivation:

$V=(\frac{4}{3})(\pi )(r^{3})$ ,

Here, V is the volume and r is the radius of the Mercury.

From the ratio of initial and final states, we obtain the following relation

$\frac{V_{2} }{V_{1} } = \frac{r_{2} ^{3}}{r_{1} ^{3}}$

as,

$V_{2}=\frac{V_{1}}{2.52}$

so,

$\frac{1}{2.52} = \frac{r_{2} ^{3}}{r_{1} ^{3}}$

$r_{2}^{3}=\frac{r_{1}^{3}}{2.52}$

$r_{2}= 0.735.r_{1}$

The factor will remain same for the diameter i.e.,

$D_{2}= 0.735 D_{1}$

For absolute diameter of Mercury:

Actual diameter of Mercury = 4879.4 km

Hence, the diameter of Mercury, if it was made of mercury would become 3590 km.

P.S.: The element mercury first letter is kept small while the other is capped

5 0

3 years ago

How many electrons does the isotope oxygen-18 have?<br> 6<br> 8<br> 10<br> 18

Alexxandr [17]

It has 8 electrons I the answer

7 0

3 years ago

Describe light with respect to its speed and its dual nature as both a wave and a particle.

Sedbober [7]

Answer:

Scientists have been debating over light being a wave or particle since its recognition.

Sir Issac Newton discovered that light had frequency and other properties. Newton described light to be a particle because it created shadows which were sharp and very clear.

Francesco Maria Grimaldi, claimed that light was a wave. This was because this scientist observed the diffraction of light and hence, claimed light to be a type of wave.

The speed of light is 299 792 458 m / s. Nothing can travel faster than light.

5 0

3 years ago

Tails of phospholipids that don't like water

densk [106]

Those tails are called hydrophobic. You can note the etymology: hydro= water, phobi = fear, aversion, dislike.

Phospholipds' tail is a long non polar chain, made of Carbon and Hydorgens, that rejects water (a polar solvent) and is attracted to non-polar compounds (oil for example). That is why that tails can atract dirt.

3 0

3 years ago

What is the concentration of NaCI in an aqueous solution that contains 0.032 grams of NaCI in 600. Grams of the solution

jolli1 [7]

Answer:

0.00032 Grams of NaCl per 1 gram of the solution

Explanation:

8 0

3 years ago