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What is the effect of temperature and moisture on the mechanical properties of a polymer?
Two charged bodies, Q1 and Q2, when separated by a distance of 2 m, experience a force of repulsion equal to 1.8 N.
The numbers of orbiting electrons in aluminum and silver are 13 and 47, respectively.
Find the force of attraction between a proton and an electron separated by a distance equal to the radius of the smallest orbit .
Over what temperature range will the microstructure be completely in the a-phase?
Using kaolin plus either silica or mullite, calculate the batch composition (in weight percent) necessary to produce a final microstructure that is equimolar .
The melting points of a series of poly(a-olefin) crystals were studied. All of the polymers were isotactic and had chains substituents of different bulkiness.
Phenol is added to solution C until a solution A_ results which is close to A in concentration
The data were obtained for the work of adhesion between the listed liquids and carbon black.
Calculate the expected ratio of single, double, and triple bond lengths according to this geometrical interpretation and compare with the measured bond lengths.
If the weight average molecular weight for DTH is 350,000, what is its number average degree of polymerization, assuming that it is monodispersed?
What are the Burger's vector representations for FCC, BCC, and SC structures?
The BCC crystal structure, h + k + l must be even if diffraction is to occur, whereas for FCC, h, k, and l must all be either odd or even.
The Great Molasses Flood on the afternoon of January 15, 1919, an unusually warm day in Boston, a 27.4-m-high, 27.4-m-diameter cylindrical metal tank
Snorkeling by humans and elephants when a person snorkels, the lungs are connected directly to the atmosphere through the snorkel tube
The deepest point known in any of the earth's oceans is in the Marianas Trench, 10.92 k/D deep.
Find the order of magnitude of the density of the nucleus of an atom. What does this result suggest concerning the structure of matter?
An iron anchor of density 7870 kg/m3 appears 200 N lighter in water than in air.
A tall cylinder with a cross-sectional area 12.0 cm3 is partially filled with mercury; the surface of the mercury is 5.00 cm above the bottom of the cylinder
A small solid ball is released from rest while fully submerged in a liquid and then its kinetic energy is measured when it has moved 4.0 cm in the liquid
A rock is suspended by a light string. When the rock is in air, the tension in the string is 39.2 N. When the rock is totally inunersed in water
A piece of wood is 0.600 m long, 0.250 m wide and 0.080 m thick. Its density is 600 kg/m3. What volume of lead must be fastened underneath it to sink
Shows a thick-film circuit. (a) What is the role of the sealing glass? (b) Why is it green? (c) What properties are important for the sealing glass?
What reactive gases would be suitable for forming the following ceramic thin films by reactive sputtering?:
What types of geologic formations are potential CO2 geologic sequestration sites and what are their current estimated capacities (expecting U.S. data)?