How many kilograms of nickel must be added to 5.66 kg of copper to yield a liquidus temperature of 1200°C? Use Animated Figure.

1) Pavithran Ravindran explains to a group of inspiring CBE students that the Reynolds number is a dimensionless group defined for a fluid flowing in a pipe as Re = Dvp/µ where D = pipe diameter, v = average fluid velocity, p = fluid density, and u = fluid viscosity. When the value of the Reynolds number is less than about 2100, the flow is laminar -- the fluid flows in smooth streamlines. For Reynolds numbers above 2100, flow is turbulent -- a great deal of internal agitation takes place. %3D Methyl ethyl ketone (MEK) flows through a 2.067-in. ID pipe at 20°C, at which temperature its density is 0.805 g/cm³ and its viscosity is 0.43 centipoise (1 centipoise = 1.00 x 10-3 kg/m.s). The average fluid velocity is 0.048 ft/s. Determine whether the flow is laminar or turbulent. %3D

on problem B    equation 1) what symbol is that? it looks like a N or an X , can you tell me the symbols for transport velocities and mass transfer   thanks  can you clarify more on what the symbolism is for that equation

Aurorae Borealis, or northern lights, are natural light displays observed around the arctic region. They are caused by the interaction of charged particles emitted in solar flares with gases in the higher strata of the atmosphere. In the process, the energy from the charged particles is transferred to the gas molecules, giving rise to the emission of light. a. Describe the mechanism by which light is emitted as a result of this interaction.

Final answer in two decimals. Show the solution.