XtraMath helps kids gain fluency in addition, subtraction, multiplication, and division. The program is conceptually similar to flash cards. Credit: Ian Moore / mashable As COVID-19 was spreading last ...
Stanford University’s Jo Boaler says teachers and parents should stop using math flash cards, stop drilling kids in addition and multiplication and especially stop forcing students to do calculations ...
The discussion revolves around the flash point, boiling point, and self-ignition temperatures of petrol and diesel, particularly in relation to pressure and phase changes. Participants explore the implications of these properties in combustion scenarios, especially in engine applications. Some participants note that the flash point temperature of petrol is lower than that of diesel, suggesting ...
The discussion revolves around the differing autoignition and flash points of n-butane and isobutane, exploring the underlying chemical and physical properties that contribute to these differences. Participants examine theoretical and experimental aspects of combustion mechanisms, intermolecular interactions, and molecular structure impacts on these properties. One participant notes that n ...
The discussion centers around the mechanism by which a metering device in an air-conditioner causes part of the refrigerant to transition from liquid to flash gas. Participants explore the relationship between pressure reduction, phase change, and temperature changes in the refrigerant, addressing both theoretical and practical aspects of the phenomenon. Some participants assert that lowering ...
The discussion centers around the phenomenon of triboluminescence observed in wintergreen Lifesavers and Altoids, specifically why Lifesavers no longer produce a blue flash when crushed, while Altoids still do. Participants explore potential chemical changes in the ingredients and the implications of these changes on the observed effect. One participant notes that the blue flash in wintergreen ...