Podcast
Questions and Answers
What is the SI unit density for a solid sphere with a density of 5.3 g/cm³?
What is the SI unit density for a solid sphere with a density of 5.3 g/cm³?
What is the resultant vector of A = −10î + 3ĵ and B = 5î – 7ĵ?
What is the resultant vector of A = −10î + 3ĵ and B = 5î – 7ĵ?
What is the magnitude of vector A = 3î – 4ĵ?
What is the magnitude of vector A = 3î – 4ĵ?
If |A|= 20 and |B|= 10 with an angle of 30° between them, what is the value of |A × B|?
If |A|= 20 and |B|= 10 with an angle of 30° between them, what is the value of |A × B|?
Signup and view all the answers
Which rule is used to determine the direction of torque?
Which rule is used to determine the direction of torque?
Signup and view all the answers
For a body in mechanical equilibrium, what condition must be satisfied?
For a body in mechanical equilibrium, what condition must be satisfied?
Signup and view all the answers
What is the mechanical advantage (M) of the elbow contraction assumed to be a lever?
What is the mechanical advantage (M) of the elbow contraction assumed to be a lever?
Signup and view all the answers
If the height of a person whose center of gravity is at 100 cm is roughly how tall?
If the height of a person whose center of gravity is at 100 cm is roughly how tall?
Signup and view all the answers
What are the terms used for sound waves lower than 20 Hz and higher than 20 kHz?
What are the terms used for sound waves lower than 20 Hz and higher than 20 kHz?
Signup and view all the answers
What is the equation that relates wave velocity, frequency, and wavelength?
What is the equation that relates wave velocity, frequency, and wavelength?
Signup and view all the answers
What is the sound intensity of a truck horn in decibels if its intensity is $10^{12} W/m^2$?
What is the sound intensity of a truck horn in decibels if its intensity is $10^{12} W/m^2$?
Signup and view all the answers
What happens to the frequency and intensity of sound when a buzzer falls from a rising hot air balloon?
What happens to the frequency and intensity of sound when a buzzer falls from a rising hot air balloon?
Signup and view all the answers
What is the pressure difference at a depth of 3 m in water relative to atmospheric pressure?
What is the pressure difference at a depth of 3 m in water relative to atmospheric pressure?
Signup and view all the answers
What force acts on a sheet of paper with an area of about 10 m² due to atmospheric pressure?
What force acts on a sheet of paper with an area of about 10 m² due to atmospheric pressure?
Signup and view all the answers
What is the formula used to determine the observed frequency for an observer moving towards a stationary source?
What is the formula used to determine the observed frequency for an observer moving towards a stationary source?
Signup and view all the answers
Which of the following is NOT a property of an ideal fluid?
Which of the following is NOT a property of an ideal fluid?
Signup and view all the answers
What happens to water when mixed with diesel, according to the properties of their densities?
What happens to water when mixed with diesel, according to the properties of their densities?
Signup and view all the answers
Under what condition does the velocity of an incompressible ideal fluid increase, according to the continuity equation?
Under what condition does the velocity of an incompressible ideal fluid increase, according to the continuity equation?
Signup and view all the answers
What is the inverse relationship described in pressure and area when force is constant?
What is the inverse relationship described in pressure and area when force is constant?
Signup and view all the answers
What describes the diastolic pressure in the blood vessels?
What describes the diastolic pressure in the blood vessels?
Signup and view all the answers
Which statement is true regarding the effect of arm position on blood pressure monitoring?
Which statement is true regarding the effect of arm position on blood pressure monitoring?
Signup and view all the answers
Which compound listed has the highest density?
Which compound listed has the highest density?
Signup and view all the answers
Which of the following is considered a basic physical quantity?
Which of the following is considered a basic physical quantity?
Signup and view all the answers
What is the approximate velocity of water flowing through a pipe with a rate of 20 cm³/s and a radius of 2.5 cm?
What is the approximate velocity of water flowing through a pipe with a rate of 20 cm³/s and a radius of 2.5 cm?
Signup and view all the answers
Which law states that pressure applied to an enclosed fluid is transmitted undiminished throughout the fluid?
Which law states that pressure applied to an enclosed fluid is transmitted undiminished throughout the fluid?
Signup and view all the answers
What should a patient with a blood pressure of 70/40 mmHg do?
What should a patient with a blood pressure of 70/40 mmHg do?
Signup and view all the answers
What is the unit of flow rate when measuring fluid dynamics?
What is the unit of flow rate when measuring fluid dynamics?
Signup and view all the answers
If the radius of a pipe is doubled, what happens to the flow rate assuming constant velocity?
If the radius of a pipe is doubled, what happens to the flow rate assuming constant velocity?
Signup and view all the answers
Which of the following statements best describes Bernoulli's principle?
Which of the following statements best describes Bernoulli's principle?
Signup and view all the answers
What is the relationship between velocity and flow rate in a pipe?
What is the relationship between velocity and flow rate in a pipe?
Signup and view all the answers
Which principle is essential for determining the buoyancy of an object in a fluid?
Which principle is essential for determining the buoyancy of an object in a fluid?
Signup and view all the answers
What is the unit of measurement for time in the F.P.S. and M.K.S. systems?
What is the unit of measurement for time in the F.P.S. and M.K.S. systems?
Signup and view all the answers
Which dimension is represented as MLT-1?
Which dimension is represented as MLT-1?
Signup and view all the answers
Which statement describes the stability of a triangular shape on a rectangular base?
Which statement describes the stability of a triangular shape on a rectangular base?
Signup and view all the answers
What does wavelength measure?
What does wavelength measure?
Signup and view all the answers
What relationship does frequency have with the period?
What relationship does frequency have with the period?
Signup and view all the answers
What factor primarily determines the frequency of sound production?
What factor primarily determines the frequency of sound production?
Signup and view all the answers
In which medium does sound travel the fastest?
In which medium does sound travel the fastest?
Signup and view all the answers
Which perception is described as loudness?
Which perception is described as loudness?
Signup and view all the answers
Study Notes
Exam Information
- Exam date: 23/8/2023
- Exam duration: 2 hours
- Exam level: 1st level
- Exam subject: Biophysics for freshman students
- Exam code: PHS1103
- Exam format: 7 pages, 2 questions (equivalent to 50 marks)
- Answer all questions in provided answer tables; choosing more than one answer is not allowed.
First Question: True or False (1 mark each, total 23 marks)
-
Time is measured in seconds in both F.P.S. and M.K.S. systems of units.
-
In general, higher the atomic mass, higher the density.
-
Velocity dimensions are LT⁻¹ and momentum dimensions are MLT⁻¹.
-
All vectors shown are not necessarily equal (implied).
-
A body with a smaller base of support has more stability against toppling. (Refer to figure for details.)
-
Skeletal muscles consist of thousands of parallel fibers, resulting in low variability in muscle force.
-
Back-neck muscle movement is a class 2 lever system. (Refer to figure for details.)
-
Wavelength is the number of waves that pass a point in one second.
Second Question: Multiple Choice (1½ mark each, total 27 marks)
-
Basic physical quantities include time, velocity, force.
-
The unit for luminous intensity in the SI system is candela.
-
Atomic mass of Fe = 56 g/mol, Avogadro's number ≈ 6.02 x 10²³ atoms/mol, mass of Fe atom ≈ 9.30x10⁻²³ g.
-
Density of a solid sphere = 5.3 g/cm³ = 5300kg/m³
-
Vector addition: If A = -10î + 3ĵ, B = 5î - 7ĵ, then A + B = -5î + (-4)ĵ
-
Magnitude of a vector A = 3î - 4ĵ is √(3² + (-4)²) = √25 = 5
-
Direction of a vector A = 10î + 7ĵ compared to the positive x-axis is (arc tangent 7/10) ≈ 35°
-
If Ả=2î + 2ĵ, B = 3î + 3ĵ, then Ả • B = 2 x 3 + 2 x 3 = 12
-
For two vectors A (20) and B(10) at 30° angle, the magnitude of the cross product is |Ả × B| = (20)(10)sin(30°) = 100
-
Torque direction is perpendicular to force and force arm, obtained using the right-hand rule.
-
In a class 2 lever, the load is located in between the force and the fulcrum.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge with this true or false quiz on fundamental concepts in Biophysics for freshman students. Covering topics such as measurement systems, vector equality, and muscle dynamics, this quiz is designed to enhance your understanding before the exam on August 23, 2023.
