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How does the rate of heat loss from a body vary with surrounding temperature?
Joey2323
HEAT LOSS FROM A BODY
The experiment was carried out 4 times, using 50ml of water in a measuring cylinder which was submerged in litre beaker of water at different temperatures. The water was taken from water baths, the fridge and the freezer to obtain the range of temperatures below. To achieve below the freezing point of water salt was added to the water.
Ambient temperature (Degrees Celsius)
Body temperature at start (degrees Celsius)
Body temperature at end (degrees Celsius)
Change in Body temperature (degrees celsius)
Mean Change in Body Temperature (degrees Celsius)
-5
37
10
12
12
7
27
25
25
30
27
0
37
14
15
13
16
23
22
24
21
23
5
37
14
16
17
17
23
21
20
20
21
10
37
19
18
18
14
18
19
19
23
20
15
37
22
23
20
20
15
14
17
17
16
20
37
26
24
27
26
11
13
10
11
11
25
37
31
29
31
30
6
8
6
7
7
30
37
34
34
35
34
3
3
2
3
3
35
37
36
36
36
37
1
1
1
0
1
Wiki User
∙ 9y ago
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What is insensible heat?
Also Latent Heat Loss. The heat that is lost through the continuous, unnoticed water loss that occurs with vaporization accounting for 10% of basal heat production. Evaporation accounts for the greatest heat loss when body head increases.. Does not result in temperature increase of surrounding air.
Why heat gained and heat loss?
Since heat flows from high temperature region to low temperature region so when a hotter body comes in contect with colder body then hotter body loses heat to colder body until both have same temperature.
How is rate of heat loss based on the surrounding temp?
Say you are investigating a murder and want to know when the victim was killed. If the body is cold, you can guess that the murder did not happen very recently. But can you be more precise in order to catch the killer? First, you will want to measure the internal temperature of the body, its core temperature. Once you have the core temperature, what else do you need to know to determine when the murder took place? Well, you will want to know what the temperature of the surroundings was in the recent past. If the body was found in the morning, you will want to know what the temperature in the area was overnight, for example. You will also want to determine if the body was insulated, say, by heavy clothing. More clothing will obviously slow the rate of heat loss. Suppose the body was found in a swimming pool or in a lake. How would this affect the rate of heat loss? One concept that is particularly important is rate of change.
What is the difference between heat gain and heat loss?
These are exact opposities - heat gain is an increase in energy that results in an increased temperature of the material. Heat loss is a loss in energy that results in a decreased temperature of the material.
Why is the layer of fleece good at reducing the transfer of heat from a skiers body?
a fleece traps a layer of air which is a insulator of heat. it reduces heat loss via conduction and convection.
What is insensible heat loss?
Also Latent Heat Loss. The heat that is lost through the continuous, unnoticed water loss that occurs with vaporization accounting for 10% of basal heat production. Evaporation accounts for the greatest heat loss when body head increases.. Does not result in temperature increase of surrounding air.
What is insensible heat?
Also Latent Heat Loss. The heat that is lost through the continuous, unnoticed water loss that occurs with vaporization accounting for 10% of basal heat production. Evaporation accounts for the greatest heat loss when body head increases.. Does not result in temperature increase of surrounding air.
What is the significance of uncoupling proteins in adipose tissue?
increased loss of body heat
What is the balance between the heat loss and the heat produced by the body?
the right side
Is heat exhaustion hypothermia?
No, losing body temperature is. Hypothermia means loss of body temperature.
Is vasodilation a defense against heat loss?
Vasodilation actually facilitates heat loss, by bringing blood closer to the surface of the body, where the heat can more readily move from the body to the surrounding environment. The body employs vasoconstriction to retain body heat, for the opposite reason. Thus even though vasoconstriction can cause peripheral coldness and pallor, it's only because the body is conserving its heat in an attempt to prevent the core body temperature from dropping.
Why heat gained and heat loss?
Since heat flows from high temperature region to low temperature region so when a hotter body comes in contect with colder body then hotter body loses heat to colder body until both have same temperature.
Is heat gain related to atmospheric temperature?
It can be, but so also is heat loss - for a hot body like a radiator.
What can serve as modes of both heat gain and heat loss from the body?
There are two sources by which heat is produced in our body.Endogenous sources and Exogenous sources.Endogenous sources heat by our metabolic and muscle activity. Exogenous sources heat when the environmental temperature exceeds our body temperature and that is transferred to our body.
How animals cope with heat?
There are four avenues of heat loss: convection, conduction, radiation, and evaporation. If skin temperature is greater than that of the surroundings, the body can lose heat by radiation and conduction. But if the temperature of the surroundings is greater than that of the skin, the body actually gains heat by radiation and conduction. In such conditions, the only means by which the body can rid itself of heat is by evaporation. So when the surrounding temperature is higher than the skin temperature.
What physical effect does fat have to the human body?
The physical effect of fat to the human body is to slow down the heat loss or accelerate the heat loss relative to the surrounding in order to maintain a body temperature of 370 centigrade. Also it provides cushion effect with less Impulse which is equal to mass x acceleration and of course a well fed look with roundish contour sometimes adding to the curves and beauty.
How do cities influence local temperature?
Cities are usually warmer than the surrounding open countryside, due to heat loss from buildings, vehicles, etc.
