Conduction
This law describes the rate of heat transfer through a solid material due to temperature gradient.
What is Fourier’s Law?
This dimensionless number characterizes the ratio of buoyancy to viscous forces in natural convection.
What is the Grashof number?
The Stefan-Boltzmann law includes this constant in its expression.
What is the Stefan-Boltzmann constant (σ)?
A metal rod is heated at one end. Explain why the other end gets hot over time.
What is because heat conducts through the rod from high to low temperature regions?
Why does a fan make you feel cooler even if the air temperature remains constant?
What is because the fan increases convective heat transfer by reducing boundary layer thickness?
Why does a black car heat up faster in the sun than a white car?
What is because black surfaces absorb more thermal radiation (higher emissivity)?
If a windowpane is made of glass (k = 0.8 W/m·K), 6 mm thick, and has a temperature difference of 30°C across it, calculate the heat flux.
What is (0.8)(30)/(0.006) = 4000 W/m²?
Compare forced convection in a car radiator vs. natural convection in a room heater. Which is more efficient and why?
What is forced convection, due to higher velocity and controlled heat removal?
A thermos uses a shiny inner surface. Explain how it reduces heat loss.
What is by reflecting radiation due to low emissivity?