Diseases, Conditions, Syndromes

Have a reusable face mask? Here's how to wash it the right way

Since the Centers for Disease Control and Prevention has recommended cloth face coverings for the general public, many have relied on those while reserving medical masks, such as N95 respirators, for medical workers.

Diseases, Conditions, Syndromes

How to tell if your symptoms are cold, flu or allergies

A runny or stuffy nose can be a symptom of the flu, a cold or allergies, and it can be hard to discern which one you have. So how do you know what's really going on with your nose?

Health

How safe is vaping?

A survey of adolescents carried out by researchers at Coventry University has shown that than less than half of e-cigarette users knew that vape products contain nicotine or that they are addictive, raising the possibility ...

Diseases, Conditions, Syndromes

Heating could be the best way to disinfect N95 masks for reuse

Since the outbreak of the COVID-19 pandemic, N95 face masks have been in short supply. Health care workers, in particular, desperately need these masks to protect themselves from the respiratory droplets of infected patients. ...

Health

Dehydration can lead to serious complications

Dehydration occurs when you use or lose more fluid than you take in, and your body doesn't have enough water and other fluids to carry out its normal functions. If you don't replace lost fluids, you will get dehydrated.

Medical research

Could coffee be the secret to fighting obesity?

Scientists from the University of Nottingham have discovered that drinking a cup of coffee can stimulate 'brown fat', the body's own fat-fighting defenses, which could be the key to tackling obesity and diabetes.

Medical research

Stanford researchers' cooling glove 'better than steroids'

(Medical Xpress)—The temperature-regulation research of Stanford biologists H. Craig Heller and Dennis Grahn has led to a device that rapidly cools body temperature, greatly improves exercise recovery, and could help explain ...

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Heat

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