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1. Glass, aluminum, and various plastic materials are used for containers. Make a list of the advantages and disadvantages of using each of these three material types; include such factors as cost, recyclability, and energy consumption for container production.
2. Discuss why it is important to consider the entire life cycle, rather than just the first stage of a material or component life.
3. Discuss how materials engineering can play a role in "green design."4. Suggest other consumer actions for minimal environmental impact than just recycling.
[For example buying in bulk, bringing usable bags to the grocery store, etc.]
a gas flows steadily into a cylindrical core of porous media and out the other side. if the output flow rate is twice
a horizontal cylinder is separated into two sections by an adiabatic frictionless piston. one section contains 0.2 m3
the base surface of a cubical furnace 3-m x 3-m x 3-m is surrounded by black surfaces at a 1200 k. specified
a 1-kg disk slides on a smooth horizontal table and is attached to a string that passes through a hole in the table.a
The flow pattern at the exit of a radial centrifugal compressor impeller shows a jet-wake behavior. In order to estimate the blockage, we assume that the wake region has zero momentum and is of angular extending theta (per passage) at the impeller ex..
Neglecting radiation and assuming steady-state conditions, calculate the surface temperature of the droplet if the ambient air temperature is 300 K. The latent heat of vaporization is 8.42 X 105 J/kg.
a 200 kg lander is approaching mars. assume a gravitational acceleration of 3.7 ms2. at the illustrated instant h 15 m
a concrete slab measuring 0.3m x 4m x 6m initially at 298 k is exposed to the sun for several hours after which its
A system consisting of 1kg of H2O undergoes a cycle composed of the following closed processes:
Three kg of nitrogen is compressed from 110 kPa, 27 C to 1100 kPa in a polytropic process with n=1.3 in a closed system. Assuming ideal gas behavior and using nitrogen table,
What is the heat flux at the plate surface - what is the surface heat flux for the original plates? Assume the temperature and ow rate of the gas to be unchanged and radiation effects to be negligible.
a 6 kg sphere moving at 3 ms collides with a 10 kg sphere traveling 2.5 ms in the same direction. the 6 kg sphere comes
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