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1 year ago

How is density different from weight and mass?

2 answers:

6 0

Density is basically how compact an object is

Weight is how heavy an object is/ how much force it exerts

Mass is how much matter is in an object

I hope this helps! If you need the formulas on how to get them you can always comment and ask :)

defon1 year ago

5 0

Hello there!

How is density different from weight and mass you say? It's simple!

1. Unlike weight, density is composed of mass and volume.

2. By dividing the mass over the volume, you can determine an object's density, while weight is the product of mass and gravity.

Hope this helps :) if so, can I get Brainliest?

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What is the length of a one-dimensional box for an electron (9.109 x 10-31 kg) with an n=1 energy of 479 kJ/mol? Give the answer

OverLord2011 [107]

Answer : The length of a one-dimensional box for an electron is $2.819\times 10^{31}\AA$

Explanation :

The energy level of quantum particle in a one-dimensional box is given as:

$E_n=\frac{n^2h^2}{8mL^2}$

where,

$E_n$ = 479 kJ/mol = 479000 J/mol

n = energy level = 1

h = Planck's constant = $6.626\times 10^{-34}Js$

m = mass of electron = $9.109\times 10^{-31}kg$

L = length of a one-dimensional box = ?

Now put all the given values in the above formula, we get:

$479000J/mol=\frac{(1)^2\times (6.626\times 10^{-34}Js)^2}{8\times (9.109\times 10^{-31}kg)\times L^2}$

$L=2.819\times 10^{21}m$

conversion used : $1m=10^{10}\AA$

$L=2.819\times 10^{31}\AA$

Therefore, the length of a one-dimensional box for an electron is $2.819\times 10^{31}\AA$

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3 years ago

Which element has 15 protons 18 electrons and a mass number of 30?

Mumz [18]

Phosphorus is the correct answer.

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3 years ago

A student has to create a model of a convex lens. Which property of a convex lens should the student include in the model?

Zepler [3.9K]

Answer:

A. The lens spreads light.

Explanation:

The convex lens will converge the light that passes through it. The direction of light will be bend to be closer to the middle point. This is the lens used for the eyeglass that treat people with hypermetropia. That is why the convex lens also called a converging lens or a plus lens. The strength of the convex lens depends on its focal length, index of the material used, and the radius of curvature.

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Explanation: This is because it has more solute than a normal solution.

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