Pj Problems - Overview
The Number Line
7 Spaces Of Interest - Overview
Triadic Unit Mesh
States Of Matter
COHN - Natures Engineering Of The Human Body
The Human-Body Systems
Faith, Love, Charity
Figure 22.11 illustrates the spectral lines of five elements (A, B, C, D) and a celestial star E.
(a) Identify the elements with the spectral lines of A, B, C and D.
(b) What elements in the star produced the spectral lines of E?
(c) A gaseous substance is more likely to exibit a line spectrum while a liquid or solid is more likely to exhibit a continuous spectrum. Why?
S7P2A21 (Identity - Physical Properties)
Pj Problem of Interest is of type identity (physical properties). Spectral lines are unique characteristics of elements and are used to identify elements.
When white light shines on the gaseous form of an atom, the atom absorbs some of the light. The light absorbed shows up as black lines on a rainbow background when examined after it passes through the gaseous form of the element and a prism. This line spectrum is called the absorption spectrum and their wavelengths are the same as those of the emission spectrum which is the result of transitions of electrons from higher energy levels to lower energy levels as they emit their excitation energies.
(a)i A is the line spectrum of the element, hydrogen (H).
(ii) B is the line spectrum of the element, helium (He).
(iii) C is the line spectrum of the element, sodium (Na).
(iv) D is the line spectrum of the element, calcium (Ca).
(b) The celestial star contains hydrogen and helium.
(c) The difference in the nature of the continuity in the spectral lines of gases, liquids and solids is a function of inter-atomic (or inter-molecular) spacing. Gas molecules are farther apart than the molecules of liquids and solids. So, their line spectra indicate transitions of individual atoms. The nearness of the atoms of liquids and to a greater extent solids, allows for group transitions of atoms in addition to the individual transitions of the atoms.
The point . is a mathematical abstraction. It has negligible size and a great sense of position. Consequently, it is front and center in abstract existential reasoning.
Derivation Of The Area Of A Circle, A Sector Of A Circle And A Circular Ring
Derivation Of The Area Of A Trapezoid, A Rectangle And A Triangle
Derivation Of The Area Of An Ellipse
Derivation Of Volume Of A Cylinder
Derivation Of Volume Of A Sphere
Derivation Of Volume Of A Cone
Derivation Of Volume Of A Torus
Derivation Of Volume Of A Paraboloid
Volume Obtained By Revolving The Curve y = x2 About The X Axis
Single Variable Functions
Absolute Value Functions
Equation Of The Ascent Path Of An Airplane
Calculating Capacity Of A Video Adapter Board Memory
Probability Density Functions
Boolean Algebra - Logic Functions
Ordinary Differential Equations (ODEs)
Infinite Sequences And Series
Introduction To Group Theory
Advanced Calculus - Partial Derivatives
Advanced Calculus - General Charateristics Of Partial Differential Equations
Advanced Calculus - Jacobians
Advanced Calculus - Solving PDEs By The Method Of Separation Of Variables
Advanced Calculus - Fourier Series
Advanced Calculus - Multiple Integrals
Production Schedule That Maximizes Profit Given Constraint Equation
Separation Of Variables As Solution Method For Homogeneous Heat Flow Equation
Newton And Fourier Cooling Laws Applied To Heat Flow Boundary Conditions
Derivation Of Heat Equation For A One-Dimensional Heat Flow
The Universe is composed of matter and radiant energy. Matter is any kind of mass-energy that moves with velocities less than the velocity of light. Radiant energy is any kind of mass-energy that moves with the velocity of light.
Composition And Structure Of Matter
How Matter Gets Composed
How Matter Gets Composed (2)
Molecular Structure Of Matter
Molecular Shapes: Bond Length, Bond Angle
Molecular Shapes: Valence Shell Electron Pair Repulsion
Molecular Shapes: Orbital Hybridization
Molecular Shapes: Sigma Bonds Pi Bonds
Molecular Shapes: Non ABn Molecules
Molecular Orbital Theory
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