Frage  |
Antworten |
87. What is the difference between Newtonian and non-Newtonian fluids? Lernen beginnen
|
|
Newtonian fluids dynamic viscosity coefficient is independent to the fluids flow conditions while in non-Newtonian this coefficient is not constant
|
|
|
86. What is the Reynolds number? Lernen beginnen
|
|
Dimensionless quantity, describing current type (either laminar or turbulent)
|
|
|
85. What is the ultrasound reflection factor for a wave between 2 mediums? Lernen beginnen
|
|
Reflected and received ultrasound wave ratio
|
|
|
84. What does standing wave's intensity equal to? Lernen beginnen
|
|
0
|
|
|
83. When does the kinetic energy of freely fluctuating(levels) material point is the largest? Lernen beginnen
|
|
|
|
|
82. Paramagnetic material is the one of which particles (molecules/atoms) contain: Lernen beginnen
|
|
|
|
|
81. What equals the current passing through the conductive ring magnetic moment, pm? Lernen beginnen
|
|
|
|
|
80. Braked X-ray waves occur due to: Lernen beginnen
|
|
electron stoppage at the surface of the anode
|
|
|
79. For X-ray tube to stimulate shorter roentgen waves: Lernen beginnen
|
|
increase the voltage between the anode and the cathode
|
|
|
78. In X-ray tube, what is stimulated? Lernen beginnen
|
|
All EM (electromagnet) spectra instead of gamma rays
|
|
|
77. What is acoustic Doppler effect? Lernen beginnen
|
|
Registered receiver sound frequency changes due to the movement of the sound source
|
|
|
76. What does Stoke's formula explain? Lernen beginnen
|
|
Resistance force depends on the environment's viscosity, speed of movement and body dimensions
|
|
|
75. How will the amount of leaked blood in the blood vessels change when the radius will decrease 3 times? Lernen beginnen
|
|
It will decrease 81 times
|
|
|
74. What does Bernoulli's equation explain? Lernen beginnen
|
|
Relationship between the ideal (small) viscosity, liquid's flow speed and pressure
|
|
|
73. What is the physical purpose of equid’s dynamic viscosity coefficients? Lernen beginnen
|
|
internal friction force, occurring when liquid layers surface area, when the gradient of speed =0
|
|
|
72. what frequency of waves is a standard for audiometric investigation? Lernen beginnen
|
|
|
|
|
71. what is the medium's impedance? Lernen beginnen
|
|
|
|
|
70. what is the unit for the wave intensity? Lernen beginnen
|
|
|
|
|
69. when does freely fluctuating material point kinetic energy is the largest? Lernen beginnen
|
|
When the force acting on it =0
|
|
|
68. What is nuclear magnetic resonance (NMR)? Lernen beginnen
|
|
Certain frequency electromagnetic wave absorption to a material, under the effect of magnetic field, due to the atoms nuclear magnetic moment orientation change
|
|
|
67. Pitch (also known as frequency of sound) depends on? Lernen beginnen
|
|
|
|
|
66. Biological effect of ionizing radiation is: Lernen beginnen
|
|
Damage in normal function – DNA damage – DNA mutation – apoptosis – cancer.
|
|
|
65. During radioactive beta decay: Lernen beginnen
|
|
Electrons and positrons are emitted from atom
|
|
|
|
Lernen beginnen
|
|
All photon energy is absorbed by electron which then leave the atom
|
|
|
|
Lernen beginnen
|
|
Non coherent scattering of x rays
|
|
|
|
Lernen beginnen
|
|
Minimal stimulus duration at twice the rheobase
|
|
|
|
Lernen beginnen
|
|
Minimal current of stimulation with very long stimulus duration
|
|
|
