4) Estimate the surface energies of PE and PET using the Zisman approach. Hint:plot cosine of the contact angle versus surface energy of the probe liquid.YLvYsvYsLProbe LiquidY, in mJ/m²OLPE in deg.OL-PET in deg.1-bromonaphthalene 44.0dimethyl sulfoxideethylene glycoldiiodomethane13.644.147.6---48.077.249.150.844.131.0formamide57.575.256.9glycerol63.187.266.8water72.895.377.1PE contact angle data take from Kwok et al. The PET contact angledata was taken from Wu et al.

4) Estimate the surface energies of PE and PET using the Zisman approach. Hint: plot cosine of the contact angle versus surface energy of the probe liquid. Probe Liquid 1-bromonaphthalene dimethyl sulfoxide ethylene glycol diiodomethane formamide glycerol water Ysv Y, in mJ/m² 44.0 44.1 48.0 50.8 57.5 63.1 72.8 YLV YSL OL-PE in deg. 47.6 77.2 44.1 75.2 87.2 95.3 OL-PET in deg. 13.6 49.1 31.0 56.9 66.8 77.1 PE contact angle data take from Kwok et al. The PET contact angle data was taken from Wu et al.

4) Estimate the surface energies of PE and PET using the Zisman approach. Hint: plot cosine of the contact angle versus surface energy of the probe liquid. Probe Liquid 1-bromonaphthalene dimethyl sulfoxide ethylene glycol diiodomethane formamide glycerol water Ysv Y, in mJ/m² 44.0 44.1 48.0 50.8 57.5 63.1 72.8 YLV YSL OL-PE in deg. 47.6 77.2 44.1 75.2 87.2 95.3 OL-PET in deg. 13.6 49.1 31.0 56.9 66.8 77.1 PE contact angle data take from Kwok et al. The PET contact angle data was taken from Wu et al.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

➤Calculate the four largest wavelengths for the Brackett and Pfund series for hydrogen. Hint: Brackett (n = 4), Pfund (n = 5) mimo.com po M
1. See example 4.2 on page 112. For silicon at 300 K, calculate the clectron concentration, no for the following scenarios. Ec- EF=0.25 eV Ec- EF=0.35 eV Ec - Er= 0.45 eV a. b. Calculate the hole concentration, po for the following: d. EF- Ev= 0.25 eV EF - Ev- 0.35 eV EF - Ev- 0.45 eV
a) A monochromator is used as shown in the setup below to obtain a single wavelength λ = 1.5 Å X-ray from X-rays emanating from an X-ray source. The monochromator is made of Germanium single crystal. This is the Miller index (111) of the planes in the Germanium single crystal and the distance between the planes is d111 = 1.2 Å. What is the value of the monochromator angle θ ? b) Calculate the energy of the X-ray with wavelength λ = 1.5 Å in eV.
Q(3): Answer bv (True or False) 1. X-ray have very short wavelengths than the light wavelengths and as a result, its energy is much lower than that of visible light. 2. Ionic solids easily dissociated into its ions in molten state and show high electrical conductivity. while ionic solids are anisotropic and brittle linked with very strong force of interactions. 3. Most Bravais lattices are of the type of primitive unit cell. 4. The axial relationship of a rhombohedral crystal system is given as (a = b = c). 5. There are two rotational operation symmetry of equilateral traingle? 6. The d-spacing of various plane provides information about the structure of the crystal. 7. The force of attraction between atoms or ions is minimum at equilibrium distance (r = r.). 8. X-ray have a very short positive wavelength that lies in the range of 1 angstrom.
The first five energy levels of the hydrogen atom are at −13.6 eV, −3.4 eV, −1.51 eV, −0.85 eV, and −0.85 eV. The absorption spectrum of a hydrogen plasma is a continuous spectrum with dark lines corresponding to all the possible transitions between these five levels. Sketch the spectrum you would expect to see at wavelengths from 400 nm to 700 nm. You do not need to use colour in your sketch, but you should provide an x-axis with tickmarks and labels in nm, label the approximate red, green and blue regions, and label each dark line with its wavelength. Show your calculations of the wavelengths. (Hint: you should show three dark lines.)
1. A star such as our Sun will eventually evolve to a “red giant” star and then to a “white dwarf” star. A typical white dwarf is approximately the size of Earth, and its surfacetemperature is about 2.5×10 3K. A typical red giant has a surface temperature of 3.0×104 K and a radius ~100,000 times larger than that of a white dwarf.a) What is the average radiated power per unit area by each of these types of stars?b) What is the ratio of total power radiated from the white dwarf over the power of the red giant
Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108m/s. a. 1.89 x h x c b. hc/3.4 c. (1.51 + 3.4)/hc d. hc/1.89 e. 1.89/hxc
You measure the structure of a crystalline sample of lead using the Ka peak of Cu X-rays at 8.06 keV. Carefully explain whether or not you would expect to see a reflection at an angle of 20.4°.
M2
7 The fundamental vibrational wavenumber ( ṽ) for 1H 127I molecule is 23096 cm-1 A. Determine the force constant (k) of 1H 127I B. Calculate the value of for 2H 127I. Show all calculations and the units. Explain the reasoning
Physics 1. Derive the expression ε(ω)=1- ωp 2 / ω2 , ωp2 =ne2 /ε0m for the dielectric constant as a function of ω for a free electron gas of number density n. 2. Show clearly that metals are opaque to light for which ω is less than ωp. 3. Calculate the wavelength cutoff for Na metal if the volume of a primitive unit cell in Na is 35×10-30 m3 how to solve this problem?
2(6) Calculate the fundamental vibrational wavenumber (in cm-1) for HI molecule, if its angular vibrational frequency is 4.394×1014 s-1. Calculate the vibrational energy of the molecule in the ground state and the force constant. Assume the mass is the mass of a proton.