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With regard to work output vs. caloric input, the thermodynamic efficiency of a human being is about 25%. This comes from measuring the work output of cyclists compared to the oxygen they consume. However, some of the energy value of the food people eat exits the body unused, because it is not metabolized. The unused portion might be 1/3 to 1/2 of the total energy value ingested. When the unused food energy value is included, the thermodynamic efficiency thus drops to 13% to 17%.
Wiki User
ā 10y ago
Wiki User
ā 12y ago1) it works by burning fuel (say fat, a nice pure hydrocarbon).
2) only the energy extracted by burning the hydrogen is available for actual body functions.
3) burning the carbon goes ONLY to making heat.
Energy of food in is 4 to 5 times greater than maximum work done by your body (so 20 to 25% efficient).
The specific heat capacity of the human body is approximately 3.5 J/gĀ°C. This means that it takes 3.5 joules of energy to raise the temperature of 1 gram of human tissue by 1 degree Celsius.
Wiki User
ā 11y agoThe specific heat, on average, of the human body is 3470 J/(kg⋅°C).
Wiki User
ā 12y agoHuman body has a movement efficiency of 20%
Wiki User
ā 10y agobecause it consists of water in its nature has abnormally high heat capacity.
Wiki User
ā 13y ago3,470 J/Kg/`C :)
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Is the heat capacity of a body the same as its specific heat capacity?
The heat capacity depends on the mass of a material and is expressed in j/K.The specific heat capacity not depends on the mass of a material and is expressed in j/mol.K.
What factor most influence the amount of energy needed to change the temperature of a substance?
specific heat capacity
What is the difference between smaller specific heat and bigger specific heat?
A smaller specific heat capacity of a body means that a smaller amount of energy is required to raise the temperature of the body by 1 K compared to the other.
What is specific heat capacity and what does it measure?
Specific heat capacity is the amount of heat needed to raise the temperature of a unit mass of a substance by 1 degree Celsius. It measures the ability of a material to store heat energy without changing its temperature significantly.
What is the speciic heat capacity of KNO3?
What is the specific heat capacity of kno3
Is the heat capacity of a body the same as its specific heat capacity?
The heat capacity depends on the mass of a material and is expressed in j/K.The specific heat capacity not depends on the mass of a material and is expressed in j/mol.K.
When does the thermal capacity of a substance become equal to its specific gravity?
The thermal capacity of a substance, also known as specific heat capacity, and its specific gravity are two distinct properties and are not directly correlated. The specific heat capacity is a measure of the amount of heat energy required to raise the temperature of a substance by a certain amount, while specific gravity is a measure of a substance's density compared to the density of water. The two properties do not become equal to each other under normal conditions.
Describe specific heat capacity as varying between different materials?
Specific heat capacity is the amount of heat energy required to raise the temperature of a body per unit of mass.
What factor most influence the amount of energy needed to change the temperature of a substance?
specific heat capacity
What are the factors upon which the amount of heat contained in a body depends?
The amount of heat contained in a body depends on its mass, temperature, and specific heat capacity. The more massive a body is, the more heat it can store for the same temperature change. Additionally, materials with a higher specific heat capacity require more heat to raise their temperature.
Why does the human body have a high heat capacity?
The human body has a high heat capacity, meaning it can absorb a lot of heat without a significant rise in temperature, due to the high water content in our bodies. Water has a high specific heat capacity, meaning it can absorb and store a large amount of heat energy before its temperature changes. This helps to regulate our body temperature and maintain a stable internal environment.
What is the specific heat capacity of Polyester?
The specific heat capacity of polyester is 2.35degrees
What is the difference between smaller specific heat and bigger specific heat?
A smaller specific heat capacity of a body means that a smaller amount of energy is required to raise the temperature of the body by 1 K compared to the other.
Which metal has the highest specific heat capacity?
No. Metals have a relatively low specific heat.
What has an affect on the amount of heat a body will store?
The material of the body and its specific heat capacity, its mass, the temperature difference between the body and its surroundings, and the duration of heat exposure all affect the amount of heat a body will store.
What is specific heat capacity and what does it measure?
Specific heat capacity is the amount of heat needed to raise the temperature of a unit mass of a substance by 1 degree Celsius. It measures the ability of a material to store heat energy without changing its temperature significantly.
Name one quantity that must be know in order to determine the amount of heat associated with a body?
There are three: Energy absorbed by a body is directly proportional to the rise in temperature of a body Heat energy absorbed by a body is directly proportional to the mass of the body Heat energy absorbed by a body depends upon its nature and is commonly called specific heat capacity.
