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answer the given below question correctly
Carbon steel balls (p= 7833 kg/m3 and cp 0.465 kJ/kg · °C) 8 mm in diameter are annealed by heating them first to 900°C in a furnace, and then allowing them to cool slowly to 100°C in ambient air at 35°C. If 2500 balls are to be annealed per hour, determine the total rate of heat transfer from the balls to the ambient air.
A 1 L beaker contains a material that decays at a first order rate of 0.25/day. How long will it take for the concentration in the container to be reduced to 10 % of its originalvalue
Helium gas contains trace amounts of methane. Consider a helium balloon pressurized to 5 psi. If methane molar mixing ratio is 800 ppmv, what is the pressure of methane in the balloon?
Soil engineers hypothesize that the share of limestone in Austin’s soils is the same as that in San Antonio soils. They take 100 bore holes in each region
Calculate the extreme-fibre stresses at mid-span for a simply supported prestressed concrete beam with a depth of 750mm, width 370mm and span of 7m under working live load of 65 kN/m and self-weight. The prestressing force.
You have taken a job at a metal plating plant, and some of the metals you work with contain arsenic as an impurity. The heated metals give off arsenic vapors, which create an average concentration of arsenic of 0.00002 mg/m3 in the air in the workpla..
the weight of a sample of coarse aggregate was measured under various conditions with the following results: oven-dry weight in air 1076.3 g air-dry weight in air 1083.3 gsaturated-surface-dry weight in air 1089.2 g
Assuming that the CPI (82-84) for March 2013 is 232.773, and your starting salary is $55,000. How much would your starting salary have been in 1983 (assume CPI=100).
find the maximum allowable force P if the maximum allowable bearing stress on 6 pins holding 2plates together is σ all=10 MPa, and the maximum allowable shear stress is τ all =25 MPa
A hydraulic jump forms in a horizontal trapezoidal channel. The base width is 4m and the side slopes are 45o. The depths upstream and downstream of the jump are 1m and 3m.
determine the nominal cross-sectional dimensions for a Douglas fir larch No. 1 grade beam of least weight that supports a total uniformly distributed load of 12 kip on a simple thirty-two foot span considering loading in shear
If you place $600 from your first paycheck into a Roth IRA earning 4.00 percent annual interest, how much will it be worth when you withdraw it in 40 years
A steady-state, incompressible two-dimensional velocity field (u,v) is given by the following components in the xy-plane u = 0.2 + 1.3x + 0.85y v = -0.5 + 0.95x - 1.3y
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