Three streams of products (all at 80 °C) mix together in a mixer. The first stream enters at the rate of 10 kg/s and has a specific heat of 4,000 J/kg K. The second stream is pure water, and it enters at the rate of 3 kg/s. The third stream has a specific heat of 3,600 J/kg K. The resulting mixture (product A) enters an indirect contact cooler that uses water at 5 kg/s. The cooling water enters at 5°C and leaves at 25°C. Another product at 40°C (specific heat = 3,000 J/kg K) flowing at the rate of 4 kg/s also enters this cooler and mixes with product A. If the final product (product B) leaves the cooler at the rate of 21 kg/s, determine its temperature. Take into account the fact that the specific heat of water varies with temperature. cp(1)= specific heat of water at 80 °C = 4194 J/kg K cp(3) = specific heat of water at 5 °C = 4206 J/kg K cp(4) = specific heat of water at 25 °C = 4178 J/kg

Packed columns were rarely used for distillation unless column diameter was less than 2.5 ft. Explain why, in recent years, some trayed towers are being retrofitted with packing and some new large-diameter columns are being designed for packing rather than trays.

What are centrifugal pumps?

Distillation is an essential operation used commonly for the separation of materials in process engineering. Explain clearly how relative volatility can influence separation process by distillation

Q1 .Stress apply on polymer sample has 10 cm length, 1 cm width and 2 mm thickness that operates at a constant strain and the elastic modulus is 340000 Psi. The stress drops to 0.850 of the initial stress afther 6 mounts. Calculate the following: a- The initial stress on the sample? b- The elastic modulus afther 12 months?

Derivation of the general equation for interpolation: develop from scratch the equation interpolation you need to develop

Describe the similarities and differences between the Lewis method and the Rigorous method.

Explain the setting time of concrete

Define Accuracy and give two examples of how this can be expressed. Define Hysteresis.

Aluminum is not as strong as steel. What other factor needs to be considered when comparing the desirability of aluminum versus steel if strength is an important consideration for a design?