Items

• product

  A new substance formed in a chemical reaction.
• project

  A specific plan or design
• projectile

  A body projected by external force and continuing in motion by its own inertia Especially : a missile for a weapon (such as a firearm).
• proof

  The process or an instance of establishing the validity of a statement especially by derivation from other statements in accordance with principles of reasoning.
• proportion

  The relation of one part to another or to the whole with respect to magnitude, quantity, or degree.
• proton

  An elementary particle that is identical with the nucleus of the hydrogen atom, that along with the neutron is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and that has a mass of 1.673 × 10−27 kilogram
• prove

  To establish the existence, truth, or validity of
• pulley

  A wheel used to transmit power by means of a band, belt, cord, rope, or chain passing over its rim
• pulse

  A transient variation of a quantity (such as electric current or voltage) whose value is normally constant
• pure

  Unmixed with any other matter
• quadratic

  Involving terms of the second degree at most
• quadrupole

  A system or device with four poles
• quality

  An inherent feature; Degree of excellence
• quantisation

  To subdivide (something, such as energy) into small but measurable increments
• quantity

  Total amount or number
• quantum

  Any of the very small increments or parcels into which many forms of energy are subdivided
• quark

  Any of several elementary particles that are postulated to come in pairs (as in the up and down varieties) of similar mass with one member having a charge of +²/₃ and the other a charge of −¹/₃ and are held to make up hadrons
• quasar

  A region at the center of a galaxy that produces an extremely large amount of radiation
• question

  An interrogative expression often used to test knowledge
• quotient

  The number resulting from the division of one number by another
• radian

  A unit of plane angular measurement that is equal to the angle at the center of a circle subtended by an arc whose length equals the radius or approximately 57.3 degrees
• radiation

  The process of emitting radiant energy in the form of waves or particles
• radioactive

  Of, caused by, or exhibiting the property possessed by some elements of spontaneously emitting energetic particles (such as electrons or alpha particles) by the disintegration of their atomic nuclei
• radius

  A line segment extending from the center of a circle or sphere to the circumference or bounding surface
• random

  Lacking a definite plan or pattern in no particular order.