Consider a packed bed of 75-mm-diameter aluminum spheres ( ϭ 2700 kg/m 3 , c ϭ 950 J/kg ⅐ K, k ϭ 240 W/m ⅐ K) and a charging process for which gas enters the storage unit at a temperature of T g, i ϭ 300 Њ C. If the initial temperature of the spheres is T i ϭ 25 Њ C and the convection coefficient is h ϭ 75 W/m 2 ⅐ K, how long does it take a sphere near the inlet of the system to accumulate 90% of the maximum possible thermal energy? What is the corresponding temperature at the center of the sphere? Is there any advantage to using copper instead of aluminum?

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i lost in getting someone back.

i learned that people are really two-faced and no matter how angelic someone appears they always have a devil side and that you cant trust anyone anymore no matter how dear they are to you.

if your wondering who it waz it waz mah still miss her tho

~batmans wife dun dun

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explanation:

assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.

answer:

the fed will purchase bonds from banks to inject money into the banking system. the banks can use these funds to provide loans to individuals and businesses.

explanation: