Question 1 Natural convection is the result of fluid motion due to: Body forces Density gradients and body forces Temperature difference alone. Density gradients. Question 2 The Grashof number...

Extracted text: Question 1 Natural convection is the result of fluid motion due to: Body forces Density gradients and body forces Temperature difference alone. Density gradients. Question 2 The Grashof number represents: The ratio of buoyancy forces to inertial forces The ratio of buoyancy forces to viscous forces forces The ratio of inertial forces to viscous forces The ratio of viscous forces to buoyancy forces


Extracted text: Question 3 Under what condition are the contribution of natural convection and forced convection of equal importance: Gr/Re^2 = 1 Gr/Re < 1="" gr/re^2=""> 1 Gr/Re = 1 Question 4 Natural convection over a vertical surface generates a flow that always moves upwards? True False