The use of Metal on Metal bearing systems are under increasing scrutiny by Medical Regulatory Agencies because: Select one or more: O a. You should not put similar materials in contact with each other in a bearing system because they may pressure weld together O b. There is concern regarding the loss of bone density surrounding the metallic implants as a result of modulus mismatch and stress shielding O c. There is concern regarding corrosion between Cobalt-Chrome and Titanium Alloy components Od. There is concern regarding the environmental pollution associated with Cobalt extraction O e. There is concern over patient sensitisation to the metals used as the body is exposed to the ionic products of metallic wear over extended periods

PdB0.15 is a which type alloy

If a heated steel nail were placed inpure O2, would you expect it to burnas readily as the steel wool does?

) – Extraction of metals Explain as fully as you can the need for different methods of extraction. Your account should include sufficient details of extraction processes to support your explanation of the need for different extraction methods for different metals. With references

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A copper-nickel alloy of composition 70 wt% Ni - 30 wt% Cu is slowly heated from 1250 °C. What is percentage of copper in the first liquid phase that forms? Use the Cu-Ni equilibrium phase diagram shown below. 1500 Temperature (°C) 1455° 1400 Liquidus L 1300 1280° α + L Solidus 1200 1100 1085° 1240° α 1000 Cu 20 40 60 80 Ni Weight percent nickel

The Sydney Tar Ponds contain toxic wastes produced by the processing of which substance? a) Wood fibres (pulp) b) Diamonds c) Coal (steel) d) Copper ore e) Nickel ore

a. What is the material that can naturally have electrons able to move across the band gap when supplied with additional energy (for example, pure silicon)? Oinsulator intrinsic semiconductor extrinsic semiconductor metal b. What is the name of the material that results from the addition of dopants to pure element in order for it to conduct electricity (for example, 0.0001% Al in Si)? O insulator O intrinsic semiconductor extrinsic semiconductor O metal

In the iron-carbon alloy phase diagram as shown in Fig. 1, draw the microstructures with indicating the name of each phases existing at (a) - (h) point.

Login AMMcGraw Hill C Chegg - Get O extrinsic semiconductor intrinsic semiconductor O insulator O metal OB https://east.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator assignment-take b. What is the name of the material that results from example, 0.0001% Al in Si)? O extrinsic semiconductor O intrinsic semiconductor Oinsulator O metal OWLv2 | Ass Submit Answer [References] a. What is the material that can naturally have electrons able to move across the band gap when supplied with additional energy (for example, pure silicon)? Blackboard Try Another Version Content OWLv2 | CX CengageNO 2 item attempts remaining New Tab + addition of dopants to pure element in order for it to conduct electricity (for