CDC launches online tool to help Americans manage extreme heat
The U.S. Centers for Disease Control and Prevention has launched a new online heat forecaster to help communities better prepare for summer's scorching temperatures.
Apr 24, 2024
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The U.S. Centers for Disease Control and Prevention has launched a new online heat forecaster to help communities better prepare for summer's scorching temperatures.
Apr 24, 2024
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Nearly 40% of Americans live where the air is polluted enough to harm them, a new report warns.
Apr 24, 2024
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Another broiling summer looms, along with another season of kids' summer sports.
Apr 22, 2024
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Nearly 1 in 5 older adults in central Ohio report not being prepared for emergencies, such as extreme weather events, or not knowing if they are ready.
Apr 19, 2024
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The U.N. labor organization warned Monday that over 70% of the world's workforce is likely to be exposed to excessive heat during their careers, citing increased concern about exposure to sunlight. It also warned of air pollution, ...
Apr 22, 2024
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In physics and thermodynamics, heat is the process of energy transfer from one body or system to another due to a difference in temperature. In thermodynamics, the quantity TdS is used as a representative measure of the (inexact) heat differential δQ, which is the absolute temperature of an object multiplied by the differential quantity of a system's entropy measured at the boundary of the object.
A related term is thermal energy, loosely defined as the energy of a body that increases with its temperature. Heat is also loosely referred to as thermal energy, although many definitions require this thermal energy to actually be in the process of movement between one body and another to be technically called heat (otherwise, many sources prefer to continue to refer to the static quantity as "thermal energy"). Heat is also known as "Energy".
Energy transfer by heat can occur between objects by radiation, conduction and convection. Temperature is used as a measure of the internal energy or enthalpy, that is the level of elementary motion giving rise to heat transfer. Energy can only be transferred by heat between objects - or areas within an object - with different temperatures (as given by the zeroth law of thermodynamics). This transfer happens spontaneously only in the direction of the colder body (as per the second law of thermodynamics). The transfer of energy by heat from one object to another object with an equal or higher temperature can happen only with the aid of a heat pump, which does work.
This text uses material from Wikipedia, licensed under CC BY-SA