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3 years ago

How did the work of Dmitri Mendeleev differ from that of John Newlands in the development of the periodic table?

Physics

2 answers:

algol133 years ago

6 0

took the quiz, it's B.

Sonja [21]3 years ago

3 0

B.

Both recognized that the elements have repeating properties but Mendeleev realized that there are elements yet to be discovered while Newlands tried to fit the known elements together.

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This famous scientist conducted experiments that led to the development of the Plum Pudding atomic model.

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J.J. Thomson discovered the electron, leading to the Plum Pudding model

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3 years ago

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The Coulomb force between two charges q1 and q2 at separation r in the air is 10N. If half of the separation is filled with medi

adoni [48]

Answer:

The value of new coulomb force is 1.43 N.

Explanation:

Given;

Coulomb's force in vacuum (air), $F_v$ = 10 N

dielectric constant, K = 7

The Coulomb's force between two charges separated by a distance r in a vacuum is given as;

$F_v = \frac{1}{4\pi \epsilon_0} \frac{q_1q_2}{r^2}$

The Coulomb's force between two charges separated by a distance r in a medium with dielectric constant is given as

$F_m = \frac{1}{4\pi K\epsilon_0} \frac{q_1q_2}{r^2}$

Take the ratio of the two forces;

$\frac{F_v}{F_m} = \frac{1}{4\pi \epsilon_0} \frac{q_1q_2}{r^2} \ \times \ \frac{4\pi K\epsilon_0 r^2}{q_1q_2} = K\\\\\frac{F_v}{F_m} = K\\\\\frac{10}{F_m} = 7\\\\F_m = \frac{10}{7} \\\\F_m = 1.43 \ N$

Therefore, the value of new coulomb force is 1.43 N.

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3 years ago

In the expression 3x2y + 4x – 5x2y, are the terms 3x2y and –5x2y like terms? Explain by providing support for your answer.

Zanzabum

Https://www.cymath.com/answer?q=%205%2B4i%2F6%2B8i
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3 years ago

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What is a conservation law? What is the basic approach taken when using a conservation law?

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A conservation law is law on a certain measurable property that is said to not change as the system undergo changes over a certain time. These laws include, conservation of mass, energy and momentum. The basic approach for these laws is to make balances and make sure the flow in is equal to what is going out the system.<span />

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3 years ago

The Difference between two opposing forces is called _____ force

Galina-37 [17]

Answer:

Unbalance force

Explanation:

Unbalanced force creates a difference between two force moving in opposite direction. some of the causes of the unbalance forces is friction amd air drags

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2 years ago

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