Ahot pipe 10.16 cm od and 50. long passes through a 40 c engines room. the temperature of the pipe surface is close to 150c. the pipe has a leyer of 2.45cm thick of polyurethane foam (kf=0.04w/m-k), and a protecting 2mm thick clean polished aluminium foil (kf=204.2 w/m-k, e=0). the heat transfer coefficient by convection to the air is 10 w/m2-k:

a) what is the total heat rate loss?

b) what is the temperature of the external aluminium surface?

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

How many neutrons does plutonium -196 with an atomic number of 78.

12. a body is a particular amount of matter. it can be a solid, liquid or gas. it can be described as existing in a. size and shape. b. motion and force c. time and space. d. location and movement.