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