WorldCat Identities

Modern Learning Aids (Firm)

Overview
Works: 160 works in 181 publications in 1 language and 450 library holdings
Genres: Biography 
Classifications: QA29.V66, 510.92
Publication Timeline
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Most widely held works by Modern Learning Aids (Firm)
Shapes and polarities of molecules( Visual )

1 edition published in 1989 in English and held by 46 WorldCat member libraries worldwide

A knowledge of the shapes and polarity of molecules is a powerful tool for interpreting the chemical properties of substances
Electrochemical cells( Visual )

1 edition published in 1964 in English and held by 19 WorldCat member libraries worldwide

Uses time-lapse photography in describing the construction and operation of an electrochemical coil, the changes at the electrodes, the cell processes, the nature of the electrode reactions, the motion of the electron and ion currents, and the relationship between concentrations and cell voltage. Uses close-ups of a hydrogen electrode to illustrate the operation and to introduce a discussion of the table of Eo values
Acid-base indicators( Visual )

1 edition published in 1962 in English and held by 15 WorldCat member libraries worldwide

Uses the proton donor-acceptor theory to interpret the experimental behavior of acid-base indicators. Experiments and animation show the effects on indicators of changing acidity; determines equilibrium constants of four indicators, and arranges the indicators in order of decreasing acid strength. Shows the competition among bases for protons by mixing the indicators and illustrates that each changes color at different total acidity
Flatworms planarians, flukes, tapeworms( Visual )

2 editions published in 1976 in English and held by 15 WorldCat member libraries worldwide

Examines planarians, their movements, food detection, and regeneration. Shows parasitic flukes in the organs of a frog, a living scolex. and several proglottids
Area under a curve( Visual )

2 editions published in 1966 in English and held by 15 WorldCat member libraries worldwide

Discusses areas under curves, with emphasis on the graphs of continuous and monotone functions. Includes a short sequence on uniform continuity
Crystals and their structures( Visual )

2 editions published between 1963 and 1999 in English and held by 13 WorldCat member libraries worldwide

Uses single crystals of sodium chloride and quartz to show typical properties of crystals. Compares cleavage, melting point, and models of crystals with those of glasses. Illustrates the use of X-rays to determine the structure of crystals, showing the diffraction of X-rays by a crystal of sodium chloride on a fluorescent screen. Uses the diffraction of water waves in a ripple tank to show how the Bragg equation allows the determination of interatomic distances in crystals
John Von Neumann a documentary( Visual )

1 edition published in 1998 in English and held by 13 WorldCat member libraries worldwide

Uses rare photographs and films to present a biography of the mathematician John Von Neumann. Includes personal recollections of friends and colleagues as well as detailed descriptions and discussions of his contributions in various fields of science
Chemical bonding( Visual )

1 edition published in 1963 in English and held by 12 WorldCat member libraries worldwide

Illustrates electrical interactions among the charged particles in two atoms and shows how these interactions can result in chemical bonding
The Echinoderms starfishes. brittle stars, sea urchins, sea cucumbers( Visual )

in English and held by 11 WorldCat member libraries worldwide

Examines 16 echinoderm species representing four major classes, showing how different modifications of form and behavior allow these creatures to fit a wide variety of ecological niches in the marine environment
What is area?( Visual )

2 editions published in 1966 in English and held by 11 WorldCat member libraries worldwide

Defines area in terms of caculus
The Hydrogen atom, as viewed by quantum mechanics( Visual )

2 editions published in 1963 in English and held by 10 WorldCat member libraries worldwide

Provides the model for the electron probability distribution in the hydrogen atom by quantum mechanics. Demonstrates by analogies the probability distribution of the electron and uses animation to show the outstanding features of the hydrogen atom
Arthropods millipedes, centipedes, crustaceans, arachnid, insects( Visual )

in English and held by 10 WorldCat member libraries worldwide

Examines the various classes of the phylum Arthropoda showing the various ecological life styles
Mechanism of an organic reaction( Visual )

1 edition published in 1963 in English and held by 10 WorldCat member libraries worldwide

Studies the hydrolysis of an organic ester to show that the discovery of a reaction mechanism includes a determination of the chemical equation, the structures of the reactants and the products, the fate of each atom of the reactants, and the structures of the intermediate molecules. Discusses the concepts of bond polarity and the effect of varying structures of one reactant. Explains that the use of 013 and its detection on the mass spectrometer provide critical experimental data for the particular mechanism of ester hydrolysis
Gases and how they combine( Visual )

1 edition published in 1962 in English and held by 10 WorldCat member libraries worldwide

Shows some properties that distinguish gases. The volume of ammonia and hydrogen chloride that combine are measured quantitatively, and simple integer volume rations are measured for the combinations of hydrogen and oxygen, of nitric oxide and oxygen, and of hydrogen and chlorine. Interprets these simple integer ratios in terms of Avogadro's hypothesis
Paul Tillich( Visual )

2 editions published between 1964 and 1990 in English and held by 10 WorldCat member libraries worldwide

Presents Paul Tillich, Protestant theologian and authority on religious philosophy, explaining his concept of ultimate concern, or concern about the meaning of one's life. Develops his distinction between faith and belief, and the significance of the difference for the church
Mass of the electron( Visual )

1 edition published in 1959 in English and held by 9 WorldCat member libraries worldwide

Using a cathode ray tube encircled by a current-carrying loop of wire, measurements are taken which enable the demonstrator to calculate the mass of the electron. The steps followed in detail are: (1) finding the kinetic energy for each particle, (2) finding the force bending the stream of particles, (3) determining the strength of the magnetic field, (4) calculating the velocity of the electrons, (5) concluding the official value for the electron's mass. The final calculation of the experimental value for the mass is left to the viewers. Demonstration by Eric Rogers, Princeton University
Mechanical energy and thermal energy( Visual )

1 edition published in 1959 in English and held by 9 WorldCat member libraries worldwide

Shows several models to illustrate both the bulk motion and random motion of molecules. Shows their interconnection as the energy of bulk motion. Discusses thermal conduction and absolute temperature scale
Protist physiology by Bruce J Russell( Visual )

2 editions published between 1975 and 1991 in English and held by 8 WorldCat member libraries worldwide

Examines the internal processes of independently living cells, including mechanisms for phagocytosis and digestion, and for saprozoic and autotrophic nutrition. Describes symbiotic associations between autotrophs and heterotrophs and methods of water balance
Courant in Gottingen and New York( Visual )

1 edition published in 1998 in English and held by 8 WorldCat member libraries worldwide

A film biography of Richard Courant
Electric interactions in chemistry( Visual )

1 edition published in 1962 in English and held by 7 WorldCat member libraries worldwide

Uses time-lapse photography and animation of the migration of positive and negative ions and their mutual precipitation in order to illustrate the chemical applications of the principles that opposite charges attract, like charges repel, and uncharged bodies have no electric interaction
 
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Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.37 (from 0.19 for Shapes and ... to 0.77 for Area under ...)

Alternative Names
Modern Talking Picture Service, Inc. Modern Learning Aids

Ward's Natural Science Establishment. Modern Learning Aids

Languages
English (27)