Muscles and Work Flashcards
How do you calculate work efficiency?
work out/energy used
What is the work-kinetic energy principle?
Work = ΔKE
What is the difference between thermal energy and heat?
Thermal energy is an atom/molecule’s kinetic and potential energy, while heat is energy transferred due to difference in temperature.
What is latent heat?
The amount of heat energy required to change the state of a material (usually in kJ/kg)
What is the formula for heat conduction?
ΔQ/Δt = kA(T1 - T2/l)
Where k is the thermal conductivity
What is heat convection?
Convection is when heat flows due to the mass movement of molecules from one location to another
What is thermal radiation?
An electromagnetic wave that all matter emits naturally.
What is the first law of thermodynamics?
Work and heat change the internal energy of a system
ΔU = Qin - W
For the human body, we use
ΔU = Ein - Qout - W, where E is the energy entering the system as food
