Water flows through a cast steel pipe (k = 50 W m. K, ε = 0.8) with an outer diameter of 104mm and 2 mm wall thickness. Calculate the heat loss (convection and radiation) per meter length of uninsulated pipe when the water temperature is 90 oC, the outside air temperature is -10 oC, the water side heat transfer coefficient is 300 W m2.K and theoutside heat transfer coefficient is 20 W/m^2K.

The heat loss per unit length is  

Explanation:

From the question we are told that

     The outer diameter of the pipe is

     The thickness is    

      The temperature  of water is    

      The outside air temperature is

        The water side heat transfer coefficient is

       The  heat transfer coefficient is  

The heat lost per unit length is mathematically represented as

Substituting values

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gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.