Search results
Results from the WOW.Com Content Network
Negative and positive thermal expansion hereby compensate each other to a certain amount if the temperature is changed. Tailoring the overall thermal expansion coefficient (CTE) to a certain value can be achieved by varying the volume fractions of the different materials contributing to the thermal expansion of the composite.
A Carnot cycle is an ideal thermodynamic cycle proposed by French physicist Sadi Carnot in 1824 and expanded upon by others in the 1830s and 1840s. By Carnot's theorem, it provides an upper limit on the efficiency of any classical thermodynamic engine during the conversion of heat into work, or conversely, the efficiency of a refrigeration system in creating a temperature difference through ...
Thermal conductivity and resistivity. The thermal conductivity of a material is a measure of its ability to conduct heat. It is commonly denoted by , , or and is measured in W·m −1 ·K −1. Heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal conductivity.
Bones recovered from the 1545 Mary Rose shipwreck reveal new insights about life for the crew in Tudor England as well as shed light on how work changes our bones.
Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible. Surface tension is what allows objects with a higher density than water such as razor blades and insects (e.g. water striders) to float on a water surface without becoming even partly submerged. At liquid–air interfaces, surface ...
Oomancy was a common form of divination practiced in ancient Greece and Rome, where it was believed that one could tell the future by interpreting the shapes formed when the separated whites from an egg was dropped into hot water. [2] For example: If the egg white resembled the shape of a bell, it would mean a wedding would be taking place soon.
MS Costa Concordia in Palma, Majorca, in 2011. Costa Concordia (call sign: IBHD, IMO number: 9320544, MMSI number: 247158500), with 3,206 passengers and 1,023 crew members on board, [1] was sailing off Isola del Giglio on the night of 13 January 2012, having begun a planned seven-day cruise from Civitavecchia, Lazio, Italy, to Savona and five other ports. [2]
Lung float test. The lung float test, also called the hydrostatic test or docimasia, [1] is a controversial autopsy procedure used in determining whether lungs have undergone respiration. It has historically been employed in cases of suspected infanticide to help determine whether or not an infant was stillborn.