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  2. Physical Science Study Committee - Wikipedia

    en.wikipedia.org/wiki/Physical_Science_Study...

    By the 1964–1965 school year, about half the US students enrolled in high school physics (200,000 students, 5000 teachers) were reportedly using the PSSC course materials. [6] However, considerable resistance developed among some teachers to the disruption of traditional methods of teaching.

  3. List of mathematical abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical...

    pdf – probability density function. pf – proof. PGL – projective general linear group. Pin – pin group. pmf – probability mass function. Pn – previous number. Pr – probability of an event. (See Probability theory. Also written as P or.) probit – probit function. PRNG – pseudorandom number generator.

  4. Csc-1 - Wikipedia

    en.wikipedia.org/wiki/Csc-1

    Csc-1, CSC-1, csc-1, or csc −1 may refer to: csc x −1 = csc( x )−1 = excsc( x ) or excosecant of x , an old trigonometric function csc −1 y = csc −1 ( y ), sometimes interpreted as arccsc( y ) or arccosecant of y , the compositional inverse of the trigonometric function cosecant (see below for ambiguity)

  5. List of common physics notations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_physics...

    List of letters used in mathematics and science; Glossary of mathematical symbols; List of mathematical uses of Latin letters; Greek letters used in mathematics, science, and engineering; Physical constant; Physical quantity; International System of Units; ISO 31

  6. List of physics mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_physics_mnemonics

    ROYGBIV (in reverse VIBGYOR) is commonly used to remember the order of colors in the visible light spectrum, as seen in a rainbow. Richard of York gave battle in vain" (red, orange, yellow, green, blue, indigo, violet). Additionally, the fictitious name Roy G. Biv can be used as well. (red, orange, yellow, green, blue, indigo, violet).

  7. Classical central-force problem - Wikipedia

    en.wikipedia.org/.../Classical_central-force_problem

    In classical mechanics, the central-force problem is to determine the motion of a particle in a single central potential field.A central force is a force (possibly negative) that points from the particle directly towards a fixed point in space, the center, and whose magnitude only depends on the distance of the object to the center.

  8. What Is a Credit Card Security Code and Why Is It Important?

    www.aol.com/credit-card-security-code-why...

    Sometimes users intentionally make purchases and file chargeback claims with the credit card company afterward to try and get something for free. This is called “cyber shoplifting,” and in ...

  9. Lists of physics equations - Wikipedia

    en.wikipedia.org/wiki/Lists_of_physics_equations

    In physics, there are equations in every field to relate physical quantities to each other and perform calculations. Entire handbooks of equations can only summarize most of the full subject, else are highly specialized within a certain field. Physics is derived of formulae only.