PMU - Year 1 Physics - Part 1

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Acoustic (sound) Impedance Za of a substance is equal to the product of:

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The frequency of the sound is;

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The velocity of the sound is:

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Main characteristic of the noise is:

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In which frequency range the human ear has maximum sensitivity:

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The pitch of the sound is determined mainly by:

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The fundamental tone f0 in a complex sound has:

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Sound can propagate in;

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Sound wavelength in the hearing band is longer than that of:

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Reflection coefficient a2 (Alpha) of sound at the boundary between two media with sound impedance Z1 and Z2 is determined by the expression:

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Which condition is least significant for sound reflection:

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When our heads are submerged in water we cannot hear people because;

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Sound wave travels across two materials with similar acoustic impedance. At the boundary surface, we expect:

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Sound timbre is;

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The psycho-physical law of Weber–Fehner on the sound perception is used to define the quantity:

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Human hearing has a maximum sensitivity at frequencies:

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The pitch of sound is determined mainly by:

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The operating frequency hearing range is:

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Human Frequency hearing range is:

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The subjective quantity "Intensity Level E" is defined at sound frequency:

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At what frequency is "Loudness L" approximately the same as "Sound Intensity Level"?

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Sound Intensity Level E is measured in units of:

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Sound Intensity Level "E" is equal to zero if:

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Sound Intensity Level (SIL) is proportional to the logarithm of the ratio of incoming to threshold intensity - 10*log(I/Io). During a test, incoming intensity is increased by a factor of 100. What will be the change in SIL?:

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The timbre (quality) of a tone:

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Is it possible for Humans to detect ultrasound?:

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Is it possible for humans to detect Infrasound:

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Timbre is related to:

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The Equal-loudness contour, introduced by Fletcher-Munson in 1933, was designed to correlate sound intensity to the subjective perception of loudness. Use the graph to estimate perceived loudness (In Phons!) at frequency 100hz and sound intensity level of 50 dB

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During a standard audiogram procedure you hear sounds at intensity level of 0 dB. This is possible because:

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Percussion is a method for:

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W?hat diagnostic method is described in the following text? : "There are four types of sounds; Resonant, Hyper-Resonant, Stony Dull or Dull. A Dull sound indicates the presence of a solid mass under the surface. A more resonant sound indicates hollow, air-containing structures".

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Simple (pure) tones with frequencies 0.125, 0.25, 0.5, 1, 2, 4 and 8 kHz, are used in:

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Sphygmomanometer is used for:

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Auscultation is:

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What diagnostic method use sub-audible sounds and murmurs (infrared range) produced from the heart?

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Hearing loss diagnostic based on variation of sound frequency:

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Mechanical waves used for breaking renal calculi (extra-corporeal lithotripsy) does not injure surrounding tissue because:

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The main characteristic of noise is:

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Consider the law of noise attenuation (figure). Which symbol refers to the type of material, noise-protection screens are made of?

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How does intensity of noise vary with the distance from the source?

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The frequency of echograph, marked on the ultrasound probe, relates mostly to:

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Velocity of US in biological tissues depend on:

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Ultrasound can propagate in:

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Reflection coefficient a(2) of US at the boundary between two media with impedance Z1 and Z2 is determined by the expression:

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The phenomenon, direct piezoelectric effect finds application in:

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The phenomenon reverse piezoelectric effect finds application in:

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The phenomena direct and reverse piezoelectric effect find application in:

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Ultrasound propagates through body fluids as

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US propagates in the bones as

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What frequency ultrasound is appropriate for deep tissue scanning?

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Ultrasound propagates to a lesser depth in tissues compared to IS because:

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Diagnostic imaging method that uses the phenomenon of reflection:

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What is the purpose of the contact gel used in echography:

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In echography, tissues are examined with:

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The contact gel must have:

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In A-mode ultrasound, the difference in acoustic impedance of tissues is depicted on the monitor as:

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In B-mode ultrasound, the difference in acoustic impedance of tissue is depicted on the monitor as:

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During echography, the contact gel is used for:

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M-mode ultrasound is used for:

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The ultrasound technique called Colour Doppler is used to obtain information about:

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Diagnostic imaging method based on Reflection:

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In a Doppler experiment, a probe frequency of 4 MHz corresponds to a frequency shift of 125 Hz. If probe frequency is now doubled to 8 MHz, what would be the expected frequency shift:

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A diagnostic US imaging instrument uses a frequency of 6 MHz. What is the corresponding wavelength in soft tissues in the body:

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Speed of blood flow could be as fast as v=75 cm/s, what is the ratio (in %) of speed of blood to the speed of ultrasound in soft tissue:

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Sonophoresis is:

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Pharmaceuticals applied with sonophoresis are:

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Sonophoresis can transport

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High Intensity Focused Ultrasound (HIFU) procedure is:

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Ultrasound Diathermy is procedure for:

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Ultrasound diathermy causes tissue:

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Sonophoresis and Ionophoresis are both methods for:

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Infrasound (IR) of certain frequencies can cause:

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The speed of IS propagation, in certain medium, depends on:

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IS does not propagate in:

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Wavelengths of infrasound are shorter than:

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The resonant frequency of cardiac activity is in the:

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The resonant frequency of vestibular apparatus is within:

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The resonant frequency of Internal Organs is within:

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The phenomenon of diffraction is more common for:

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Which Science is related to IS:

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Which of the following is not true for earthquakes?

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What is the quantity transferred during diffusion:

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The quantity transferred during heat conduction is:

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Quantity transferred by internal friction:

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A necessary condition for the process of diffusion is the availability of:

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A necessary condition for the process of internal friction is:

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A necessary condition for heat conduction is:

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High heat conductivity of metals is explained by:

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Wet clothes make you feel cold because:

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Which organs and tissues of the human body have the least heat conductivity:

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Which organs and tissues have the greatest heat conductivity

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What is the physical meaning of cell membrane permeability, measured in m/s:

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What is the different between osmosis and diffusion:

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Which fluid phenomenon is used in hemodialysis:

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Consider Fick's Law (Figure) of diffusion, If contact surface is doubled and concentration gradient is reduced by a third, how can we adjust exposure time, to ensure the same total mass transfer:

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The two properties of ideal fluids (liquid) are:

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Ideal Fluids are defined as:

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Newtonian fluids (blood in large vessels) have density p and dynamic viscosity n as:

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Non-newtonian fluids (blood in small vessels) are characterized by density - p, dynamic viscosity n; as follows

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The role of surfactant in the alveoli of lungs is to reduce:

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The additional (Laplace) pressure Change-P does not depend on:

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The flow-ability (fluidity) of blood is determined by the value of:

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Fluidity of which body liquid is much lower than the rest:

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Let n be the dynamic viscosity of a liquid, and n-water = dynamic viscosity of water. The relative viscosity is given by:

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Relative viscosity is a dimensionless quantity, because it is:

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Obstruction of blood vessels by gas bubbles (embolism) can be contributed to:

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Pulse wave velocity depends primarily on:

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Gas embolism is explained best with:

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What is a pulse wave?

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Pulse wave velocity in people with atherosclerosis

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The most informative quantity about Vascularity of organ is:

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Reynolds number Re for blood fluid describes:

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In a microgravity environment, such as the International Space Station, blood flow is not subjected to gravitational forces. This leads to reduction of the heart rate and the cardiac output. Upon return to earth cosmonauts often faint. This is due to:

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In the cardiovascular system, what physical quantity is preserved to assure a proper function:

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In auscultation blood pressure measurement, systolic pressure is indicated by:

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In auscultation blood pressure measurement, Diastolic pressure is indicated by:

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What causes the so called Korotkoff sounds

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I would expect that, together with a sphygmomanometer, the finger pulse detector:

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I would expect that the systolic blood pressure measured with the arm raised above the dead would be:

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The terms systole and diastole usaully refer to the ........... and ............. , respectively, of the ............. .

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The lower bound of blood pressure in "Arteria Brachialis", is determined (stethoscope) from what type of sounds:

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The optimal blood pressure is considered to be:

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Normal blood pressure is considered to be:

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Choose the correct match: Upper bound arterial blood pressure depends on the condition of ............. ; Lower bound of arterial blood pressure depends on the condition of ........... .

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Define the sub-pressure in the intrapleural space:

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Surfactant facilitates breathing through

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The role of the surfactant in the lungs is to make changes in:

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Inspiration is:

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What is the approximate volume of air in one inspiration:

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The expiration is:

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Difficult breathing in long-term smokers is due to:

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All Questions uploaded word for word from MCQ book. All Credit to Authors. Mistakes due in process may have been made, use and check your work at your own discretion. Only simple writing allowed, i.e Superscript and Subscript absent.

PMU - Year 1 Physics - Part 1

Acoustic (sound) Impedance Za of a substance is equal to the product of:

The frequency of the sound is;

The velocity of the sound is:

Main characteristic of the noise is:

In which frequency range the human ear has maximum sensitivity:

The pitch of the sound is determined mainly by:

The fundamental tone f0 in a complex sound has:

Sound can propagate in;

Sound wavelength in the hearing band is longer than that of:

Reflection coefficient a2 (Alpha) of sound at the boundary between two media with sound impedance Z1 and Z2 is determined by the expression:

Which condition is least significant for sound reflection:

When our heads are submerged in water we cannot hear people because;

Sound wave travels across two materials with similar acoustic impedance. At the boundary surface, we expect:

Sound timbre is;

The psycho-physical law of Weber–Fehner on the sound perception is used to define the quantity:

Human hearing has a maximum sensitivity at frequencies:

The pitch of sound is determined mainly by:

The operating frequency hearing range is:

Human Frequency hearing range is:

The subjective quantity "Intensity Level E" is defined at sound frequency: