Physics, 05.02.2020 11:49, LizzieS8167
Unit cell dimensions for polyethylene may be assumed to be as follows: a-0.741 nm, b=0.496 nm, c=0.254 nm, a=ß=y= 90° the wavelength of cuk radiation is 0.1542 nm. 17.1 a flat-plate x-ray diffraction pattern was obtained from an unoriented sample of polyethyl- ene using cukk, radiation. it consisted of three rings of radius 22.2, 36.6 and 19.7 mm. the specimen-to-film distance was 50 mm. calculate the d-spacing of the planes giving rise to these reflections. it is thought that these reflections are from (hk0) type planes. draw a scale diagram of the unit cell of polyethylene projected along the c-axis. measure the spacing of the low-index (hk0) type planes and hence identify the planes giving rise to the observed reflections
Answers: 3
Physics, 22.06.2019 10:00, mathscience9301
Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.
Answers: 2
Unit cell dimensions for polyethylene may be assumed to be as follows: a-0.741 nm, b=0.496 nm, c=0....
Mathematics, 16.06.2020 19:57
Mathematics, 16.06.2020 19:57
Mathematics, 16.06.2020 19:57
Mathematics, 16.06.2020 19:57
Mathematics, 16.06.2020 19:57