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2 years ago

What is a term called gradient in Earth Science?

1 answer:

4 0

The gradient is the slope of a linear equation, represented in the simplest form as y = mx + b. In Earth Science, the gradient is usually used to measure how steep certain changes in elevation are.

In order to find the gradient in a topographical setting, one must know two things: the elevation of two points and the distance between the two points. Once these values are known, the gradient can be found by dividing the change in field value, or the change in elevation, by the distance. The higher the gradient value is, the steeper the slope is.

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The molecular clock theory uses genetic traits to estimate how long ago various groups of organisms diverged evolutionary from o

Nataliya [291]

Many scientific investigations have provided evidence to support this as the best explanation of the data

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2 years ago

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Explain how you will seprate a mixture gari and sugar

Karo-lina-s [1.5K]

Answer:

The sugar would dissolve in water. You could then pour off the solution and wash the remaining sand with a bit more water. Heat the water to evaporate it from the sugar, and the two are separated.

Explanation:

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2 years ago

How many molecules are there in 6.73 moles of phosphorus trichloride? (write your answer in scientific notation).

anyanavicka [17]

Answer: There are $4.05\times 10^{24}$ molecules in 6.73 moles of phosphorus trichloride

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

1 mole of $PCl_3$ contains = $6.023\times 10^{23}$ molecules

Thus 6.73 moles of $PCl_3$ contains = $\frac{6.023\times 10^{23}}{1}\times 6.73=4.05\times 10^{24}$ molecules

Thus there are $4.05\times 10^{24}$ molecules in 6.73 moles of phosphorus trichloride

3 0

2 years ago

Atmospheric pressure at the summit of mount everest is about one third the pressure at sea level, which is 760 mm hg. if oxygen

vichka [17]

Atmospheric pressure at sea level is 760 mmHg.
We have been told that at the summit the pressure is only one third the pressure at sea level.
Then the pressure at the mountain top is $\frac{760}{3}$ mmHg
Air is made of a mixture of gases. the pressure that each gas exerts individually contributes to the total pressure of the system. The pressure that each gas exerts is the partial pressure of that gas which depends on the mole fraction of that gas or percentage composition of the individual gas.
Partial pressure of Oxygen - total pressure x percentage composition
Therefore pO₂ - $\frac{760 * 0.21}{3}$ = 53.2 mmHg
Answer is 53 mmHg

6 0

2 years ago

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Describe the main difference between the Bohr model of the atom and the Rutherford model.

atroni [7]

Answer:

The main difference between the two models was about the location of the electron in an atom.

Explanation:

Rutherford described that:

The electrons were outside of the nucleus.

They were equal in number to the "positiveness" of the nucleus.

Also, He randomly placed the negative electrons outside the nucleus.

Bohr improved the Rutherford model:

Bohr placed the electrons in distinct energy levels.

Electrons only exist in fixed orbitals (shells) and not anywhere in between.

Each shell has a fixed energy

Rutherford explained the nucleus of an atom, while Bohr was more into the electrons and their energy levels.

8 0

2 years ago

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