vapour pressure thermometer
61Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
62industrial glass — Introduction solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… …
63Thermodynamics — Annotated color version of the original 1824 Carnot heat engine showing the hot body (boiler), working body (system, steam), and cold body (water), the letters labeled according to the stopping points in Carnot cycle …
64Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn …
65Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …
66measurement system — Introduction any of the systems used in the process of associating numbers with physical quantities and phenomena (metrology). Although the concept of weights and measures (measurement) today includes such factors as temperature, luminosity …
67Relative humidity — is a measurement of the amount of water vapor that exists in a gaseous mixture of air and water. Estimating relative humidity The relative humidity of an air water vapor mixture can be estimated if both the temperature ( T ) and the dew point… …
68Humidity — is the amount of water vapor in the air. In daily language the term humidity is normally taken to mean relative humidity. Relative humidity is defined as the ratio of the partial pressure of water vapor in a parcel of air to the saturated vapor… …
69chemistry — /kem euh stree/, n., pl. chemistries. 1. the science that deals with the composition and properties of substances and various elementary forms of matter. Cf. element (def. 2). 2. chemical properties, reactions, phenomena, etc.: the chemistry of… …
70Thermoregulation — is the ability of an organism to keep its body temperature within certain boundaries, even when temperature surrounding is very different. This process is one aspect of homeostasis: a dynamic state of stability between an animal s internal… …
