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Questions and Answers
How does the absolute error of the result of radioactive counting change, if we measure it for 4 times longer with constant activity?
How does the absolute error of the result of radioactive counting change, if we measure it for 4 times longer with constant activity?
Doubles
Which is NOT an SI unit?
Which is NOT an SI unit?
The stochastic biological effect is...
The stochastic biological effect is...
Where does the direction of the light ray passing through the human eye change the most?
Where does the direction of the light ray passing through the human eye change the most?
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How does the volume velocity of a viscous liquid depend on the pressure difference?
How does the volume velocity of a viscous liquid depend on the pressure difference?
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Which statements are true?
Which statements are true?
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What isotopes are used to measure the dilution volume of blood?
What isotopes are used to measure the dilution volume of blood?
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The decay constant of a radioactive isotope with a half-life of 1 second is approximately:
The decay constant of a radioactive isotope with a half-life of 1 second is approximately:
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What kind of EEG waves does the resting brain emit?
What kind of EEG waves does the resting brain emit?
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A biconcave lens is a diverging lens...
A biconcave lens is a diverging lens...
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In which imaging equipment does the absorption caused by the skull impair the resolution of the images of the brain?
In which imaging equipment does the absorption caused by the skull impair the resolution of the images of the brain?
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The Laplace law states:
The Laplace law states:
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How does blood pressure change in the brain of a person who stands up suddenly?
How does blood pressure change in the brain of a person who stands up suddenly?
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Study Notes
Radioactive Counting Error
- If radioactive counting is measured for four times longer with constant activity, the absolute error doubles.
SI Units
- Speed and weight are not SI units.
Stochastic Biological Effect
- The frequency of the effect increases with the dose.
- This effect is heritable.
Light Ray Change in the Eye
- The direction of a light ray changes most significantly as it enters the cornea.
Volume Velocity of Viscous Liquid
- The volume velocity is directly proportional to the pressure difference.
Sound Source and Detector Frequency
- If the sound source approaches the detector, the detected frequency is higher than the emitted frequency.
- Stokes' law states the diffusion constant is inversely proportional to the viscosity of the medium.
Blood Dilution Isotopes
- 51Cr and 131I are used to measure the dilution volume of blood.
True Statements
- The transmission speed of higher pitched sounds is slower than that of deeper sounds.
- Mediated diffusion is faster than simple diffusion.
Radioactive Isotope Decay Constant
- The decay constant is approximately 0.7/s for a half-life of 1 second.
Resting Brain EEG Waves
- The resting brain emits alpha waves.
Diverging Lens
- A biconcave lens is a diverging lens.
- The refractive index of the lens must be greater than the refractive index of the medium.
Brain Imaging and Absorption
- CT scans are affected by skull absorption, reducing the resolution of brain images.
Laplace Law
- The tension in the wall of a circular pipe is created by the pressure inside.
Blood Pressure Change (Sudden Standing)
- Blood pressure decreases in the brain when a person stands up suddenly.
Laminar Blood Volume Velocity
- The volume velocity of laminar blood doubles if the radius of the blood vessel increases by 19%.
Imaging Procedure and Ionizing Radiation
- CT and PET scans use ionizing radiation to create images.
Dark-Adapted Eye Sensitivity
- The dark-adapted eye is more sensitive.
Coherent Light Wave Interference
- Two light waves cause permanent interference if they are coherent and their phase difference is constant.
SI Unit for 1/s
- The SI unit for 1/s is frequency and the decay constant.
Korotkoff Noise
- Korotkoff noise occurs when the air bag pressure falls below the peak pressure created during the heartbeat.
Ionizing Radiation and Biological Effect
- 3 MeV alpha radiation has the greatest biological effect when energy is held constant.
Ultracentrifugation and Movement
- A lower frictional coefficient leads to faster movement, and a smaller diffusion constant to slower movement in ultracentrifugation.
Positron Beta Decay
- The atomic number increases by one, and the mass number does not change.
Effective Half-Life of Radioisotope
- The effective half-life of a radioactive isotope introduced into the body is less than its biological half-life.
- It is equal to the reciprocal of the sum of the reciprocals of the two half-lives.
Not True about Alpha Particles
- Alpha particles are not protons or high-energy photons.
EEG Wave Amplitude
- Delta waves have amplitudes in the range of 50-100 μV.
Isotope Decay Percentage
- After 20 minutes, 75% of a 10-minute half-life isotope decays.
- After 40 minutes, 6.25% of a 10-minute half-life isotope remains undecayed.
Refractive Index of Lenses
- The refractive index of a lens system is the sum of the refractive indices of the individual lenses in contact.
Radioactive Source Activity
- The activity of a radioactive source is the number of radioactive decays per second.
Stokes' Law and Resistance Force
- Stokes' Law describes the resistance force on a sphere moving in a viscous liquid.
Electromagnetic Imaging Procedures
- Echoencephalography does not use electromagnetic radiation to create images.
Refraction and Medium Properties
- Refraction at the boundary of two media depends on the density of the media.
- The relative refractive index is also influential.
Light Wave Interactions
- Two light waves that meet can add their evecations together.
Object Outside Focal Length of Converging Lens
- When an object is outside the focal length of a converging lens, the image is real and inverted.
Frequency for Field Diathermy
- The frequency used for field diathermy is 0.03 GHz.
Ultrasound Frequency Band
- The ultrasound frequency band used in medical applications is 2-18 MHz.
Pressure in a Pipe
- The pressure increases if the diameter of a pipe increases; and decreases when the diameter decreases.
Diffusion Constant Dependence
- The diffusion constant depends on the shape of the diffusing particle and temperature.
MRI for Cancerous Tumors
- MRI is the most accurate imaging method for detecting cancerous tumors.
Braking Radiation
- Braking radiation performance depends on the accelerating voltage.
Patch-Clamp Technique
- The patch-clamp technique greatly narrows the membrane area to be tested.
EEG Wave Frequency
- Teta waves have frequencies between 4 Hz and 7 Hz.
Solutions That Cause Hemolysis
- A hypotonic solution causes hemolysis or rupture of red blood cells.
ECG Peak Magnitude
- The magnitude of the ECG QRS complex peak is 1–2 mV.
Lambert's Law
- The decrease in light intensity passing through a material depends on the thickness of the material.
- The amount of light passing through a material is proportional to the thickness of the material.
Blood Pressure and Sudden Standing
- The blood pressure in a standing person is highest in the heart.
Volume Velocity and Viscosity
- The volume velocity of a viscous liquid is inversely proportional to viscosity.
Isotopic NaCl Solution Concentration
- The concentration of Na in an isotonic NaCl solution is 0.9%.
Effective Dose
- Effective dose is measured in J/kg.
Decreasing Measurements
- The error in measurements decreases when there is an increase in the number of measurements.
Non-Basic SI Quantity
- Weight and the speed of light in a vacuum are not basic SI quantities; they are derived quantities.
False Statement about Dark Adaption
- It is not true that dark adaptation takes minutes.
Mechanical Energy of a Cat
- A cat's mechanical energy is greater when sitting still atop a wall than when moving across the floor.
Sound Statement and Truth
- Sound of higher pitches has lower transmission compared to deeper sounds.
- Thermography has no negative impact on the fetus's health.
Isotopic Decay Percentage
- After 1 hour, 12.5% of 20-minute half-life isotope is not decayed.
Diffusion Constant Dependence
- The diffusion constant is not dependent on pH value or the density of the medium.
Alpha Particle Statements
- Alpha particles are doubly ionized helium atoms and are helium nuclei.
Sound and Penetration Statements
- Mediated diffusion is a faster diffusion process compared to simple diffusion.
- Sounds of higher pitches have lower transmission capacity as compared to deeper sounds.
Refraction and Medium Density
- The refraction at a medium boundary depends on the density of the respective media.
Electron Wavelength in Vacuum
- The wavelength of an electron in a vacuum is 0.3 µm.
Visual Acuity and Eye Adaptation
- The light-adapted eye has poor visual acuity and the dark-adapted eye is more sensitive.
Different Question Types
- A summary of statements is required.
Bremsstrahlung
- Bremsstrahlung's power depends on the accelerating voltage.
- The impulse's dimensions are kg⋅m/s.
- The light atomic nucleus is approximately 10-15 meters in size.
Performance Definition
- Performance is defined as energy per unit time.
Half Radian Value
- A half radian is approximately 28.672 degrees.
Beta Radiation Spectrum
- Beta radiation has a continuous spectrum and maximum energy values.
- It is not necessarily constant, meaning that the particles do not all have the same energy.
Mesophases Properties
- Mesophases demonstrate anisotropy, which is a property that varies depending on direction, or axis.
Sine Function Application
- The sine function's application with the argument remains consistent with the same arguments, or time, after an integer multiple of 2π is added to the original argument.
- For any angles separated by a multiple of 2π, the output of a sine function remains the same.
Half-Life and Decay
- Remaining after three half-lives, a quantity of material will be 12.5% of the original.
Lambert-Bert Law Application
- Lambert-Bert's law applies in relation to light reflection from thin solutions.
Torque Types
- Bending and twist are examples of torque types.
Thermodynamically Isolated Systems
- Systems that do not interact with external factors or have a constant energy are thermodynamically isolated systems.
Equilibrium in Mechanical Systems
- All the forces and torque add up to zero, which then leads to equilibrium in a mechanical system.
Isotherm Thermodynamics
- Isotherm thermodynamics exists when the temperature is constant.
Ionization and Electrons
- Ionization occurs when an electron is freed, becoming independent, or more specifically; free electrons, or electrons that are not associated with an atomic nucleus.
Bird Energy
- The bird's kinetic energy is about 50 J.
Sound Dimension
- The dimension corresponding to sound is ground frequency measurement.
X-ray Attenuation
- Elementary processes include photon effect, pair formation, and Compton scattering for x-ray attenuation.
Abbe Theory and Light Reflection
- Abbe theory is an idea which is applicable to light reflection upon thin substances.
Extensive Dimension
- Extensive dimensions include mass and volume.
- They are additive.
Ionized Radiations
- Beta radiation and Gamma radiation are types.
Lens Errors
- Errors in lenses include chromatic aberration and spherical aberration.
Beta Radiation Range
- Beta radiation's range in air is 10 cm to a few meters.
- In soft tissue, it spans a few millimeters.
Boltzmann's Distribution
- Boltzmann's distribution does not describe effective half-times or the bound state of electrons.
Heat Processes
- Types of heat processes include conduction and convection.
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Description
Explore key physics concepts relating to radioactivity, sound, and fluid dynamics. This quiz covers topics such as radioactive counting errors, the effects of sound frequency on detection, and the behavior of viscous liquids. Test your understanding of these fundamental principles in physics.
