Magnetic Levitation (MagLev) trains “float” on powerful magnetic fields to reduce friction. Aluminum is widely use on MagLev trains. Why is aluminum so widely used and what other materials could possibly be used?

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.