You are asked to design a metal alloy for a high temperature application. What type of metal alloy phase diagrams should you consider first for this application?
(a) Continuous solid solution
(b) Eutectic
(c) Compound formation
(d) Peritectic
(c) Compound formation
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Calculate the half-value thickness (in mm) of lead if it reduces the intensity of a beam of x-rays whose wavelength is 10 pm by a factor of two. (Assume the linear absorption coefficient of lead is 43 cm?1 for x-rays of wavelength 10 × 10^?12 m.)
a. 0.24 b. 0.20 c. 0.12 d. 0.16 e. 0.18
In a neutron star, the protons and electrons are fused together, leaving only neutrons
Indicate whether the statement is true or false
The oldest Earth rocks so far discovered and dated are _____
A) amethyst crystals B) rhodonite crystals C) zircon crystals D) turquoise crystals
Briefly discuss the effect of active galaxies on the clusters of galaxies
What will be an ideal response?