Question

Людина, маса якої дорівнює 70 кг, щосекунди віддає навколишньому середовищу 40 Дж енергії. Пізнайкові стало цікаво, упродовж якого часу температура людського тіла зросте від 36 до 42 , якщо передача тепла навколишньому середовищу припиниться. Питома теплоємність тканин людського тіла наближено дорівнює 3500 Дж./кгС .

Answer 1

Ответ: до 116Дж,/кгС

Answer 2

Calculation of Time Required for Body Temperature to Increase

To calculate the time required for the body temperature to increase from 36°C to 42°C, we need to consider the energy transfer between the human body and the surrounding environment.

Given: - Mass of the person = 70 kg - Energy released per second by the person = 40 J - Specific heat capacity of human tissues = 3500 J/(kg·°C)

To find the time required for the temperature to increase, we can use the formula:

Q = mcΔT

Where: - Q is the energy transferred (in Joules) - m is the mass of the object (in kg) - c is the specific heat capacity of the material (in J/(kg·°C)) - ΔT is the change in temperature (in °C)

In this case, we want to find the time required for the temperature to increase by ΔT = 42°C - 36°C = 6°C.

Let's calculate the energy required to increase the temperature by 6°C:

Q = mcΔT = (70 kg) × (3500 J/(kg·°C)) × (6°C) = 1,470,000 J

Now, we can calculate the time required using the formula:

Time = Q / Power

Where: - Q is the energy transferred (in Joules) - Power is the energy released per second (in Joules per second)

Time = 1,470,000 J / 40 J/s = 36,750 seconds

Therefore, it would take approximately 36,750 seconds for the body temperature to increase from 36°C to 42°C if the transfer of heat to the surrounding environment is stopped.

Please note that this calculation assumes no other factors affecting the body temperature, such as metabolic processes or external heat sources.