In an ionically bonded solid the force between two ions is given by:
F= b/r^2 - c/r^10
...
Engineering, 26.10.2021 14:30 justinc10
In an ionically bonded solid the force between two ions is given by:
F= b/r^2 - c/r^10
where r is the distance between the ions, b and care constants where b= 1.2x10^-28 Nm^2 and c= 1.8x10^-105 Nm^10.
Required:
a. Identify the attractive and repulsive terms in the expression.
b. Determine the ion separation in Å in the solid.
c. Determine the energy in eV required to separate the ions in the solid to an infinite distance apart.
Answers: 3
Engineering, 03.07.2019 14:10
Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.
Answers: 1
Engineering, 03.07.2019 14:10
When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point
Answers: 3
Engineering, 03.07.2019 14:10
Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.
Answers: 2
Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
Mathematics, 20.09.2020 23:01
Social Studies, 20.09.2020 23:01
Mathematics, 20.09.2020 23:01
Mathematics, 20.09.2020 23:01
Mathematics, 20.09.2020 23:01
English, 20.09.2020 23:01
Biology, 20.09.2020 23:01
Physics, 20.09.2020 23:01
Mathematics, 20.09.2020 23:01
History, 20.09.2020 23:01
Geography, 20.09.2020 23:01
Mathematics, 20.09.2020 23:01
Geography, 20.09.2020 23:01
Physics, 20.09.2020 23:01