When kaolinite clay [al2(si2o5)(oh)4] is heated to a sufficiently high temperature, chemical water is driven off.

(a) under these circumstances, what is the composition of the remaining product (in weight percent al2o3)?

(b) what is the liquidus temperature of this material?

(c) what is the solidus temperature of this material?

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object