Chemistry, 19.12.2020 04:50 jholland03

In Hooke's law, Fspring=kΔx, what does the ∆x stand for? the constant of gravity

the distance the spring stretches

the amount of force acting on the spring

the elastic constant, a number that tells the relative strength of the spring

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Answer from: charliiboddie29

The distance the spring stretches is the correct option.

The explanation is as follows:

$F_{spring} = -k\Delta x$

here

K represent the spring constant

$\Delta x$ represent the compression or stretching in the spring

Therefore, second option is correct.

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Answer from: treaustin656

"The distance the spring stretches " is the correct option.

Explanation:

The Hooke's law for a spring is given by :

$F_{spring}=-k\Delta x$

Where

k is spring constant in N/m

$\Delta x$ is the compression or stretching in the spring

Hence, the correct option for $\Delta x$ is (b) "the distance the spring stretches .

Answer from: Quest

Forgot the question hahaha

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

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