BPK 142 cold & underwater physiology questions
n answers rated A+ updated
1. Radiation Heat loss mechanism
-exchange of electromagnetic energy waves emitted from one object
and ab- sorbed by another
-ex. camp fire heating skin
-at room temp and naked, 60% heat loss due to radiation
2. conduction occurs when 2 surfaces with dittering temperatures are in direct contact
-direct transfer of heat
-water is excellent conductor
3. insulators substances that are BAD at transferring heat
-ex: Air
4. rate of inversely proportional to thickness of insulating substance i.e. air trapped
conductive in goose down clothing
heat transfer
1/
15
, BPK 142 cold & underwater physiology questions
n answers rated A+ updated
5. convection requires that one of the media be moving i.e. fluid or gas.
-temp gradient between skin and air velocity important in determining
convec-
2/
15
n answers rated A+ updated
1. Radiation Heat loss mechanism
-exchange of electromagnetic energy waves emitted from one object
and ab- sorbed by another
-ex. camp fire heating skin
-at room temp and naked, 60% heat loss due to radiation
2. conduction occurs when 2 surfaces with dittering temperatures are in direct contact
-direct transfer of heat
-water is excellent conductor
3. insulators substances that are BAD at transferring heat
-ex: Air
4. rate of inversely proportional to thickness of insulating substance i.e. air trapped
conductive in goose down clothing
heat transfer
1/
15
, BPK 142 cold & underwater physiology questions
n answers rated A+ updated
5. convection requires that one of the media be moving i.e. fluid or gas.
-temp gradient between skin and air velocity important in determining
convec-
2/
15
