WorksheetsNgân Hàng Câu Hỏi Ôn Tập
Total questions: 152
Worksheet time: 2hrs 34mins
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A12 = - p.∆V
A12 = - ∫ pdV
A12 = (3/2)k.∆T
A12 = (3/2)nR.∆T
How many forms of energy are there in living organisms?
3
4
5
6
What characteristic does an isolated system have?
δQ = 0; δA = 0
δQ = 0; δA > 0
δQ > 0; δA = 0
δQ > 0; δA > 0
How many types of internal energy are there in living organisms?
3
4
5
6
What characteristic does heat have?
Depends on the initial state of the system
Depends on the states of the system
Depends on the process of system change.
Depends on the final state of the system
What characteristic does work done by the system have when a force is applied to the external environment?
Is a function of state
Is a function of process
Is the total kinetic energy of the system's particles
Is the total potential energy of the system's particles
Which statement is correct?
A and U are functions of process, Q is a state function.
A is a function of process, U and Q are state functions.
Q and U are functions of process, A is a state function.
A and Q are functions of process, U is a state function.
What characteristic does the internal energy of a system have?
Is a function of process
Is a function of state
Is the total kinetic energy of the chaotic motion of particles
Is the total potential energy of the particles
What type of work must the body perform during the process of living?
Chemical work
Thermal work
Diffusion work
Ultrafiltration work
What characteristic does the energy transformation process in living organisms have?
Food provides heat like fuel provides heat
Heat provided to the body is used to do work and transformed into other forms of energy
Heat generation is a general property of living organisms
Primary heat generated by ATP hydrolysis
What is work?
What are the characteristics of work?
Depends on the initial state of the system
Depends on the states of the system
Depends on the process of the system's transformation
Depends on the final state of the system
Choose the correct statement:
Heat depends on the state of the system
Primary heat is also called positive heat
Primary heat is generated when breaking high-energy bonds
Primary heat is generated when the body absorbs energy from food
What are the characteristics of a heat engine?
It is a device that converts work into heat.
The agent does not have to be in direct contact with the hot and cold sources.
Efficiency is: η=1−T2/T1
Work produced is: A = |Q1| - |Q2|
Which statement about entropy is correct?
Entropy is a function of the transformation process
All processes occur in a direction that reduces the system's entropy
When the system is isolated in equilibrium, its entropy is at a minimum
Entropy is a quantity that characterizes the degree of disorder of the system
When does a concentration gradient appear?
When there is a difference in concentration of a substance in the cell and the surrounding fluid
When there is a difference in osmotic pressure between the inside and outside of the cell membrane
When a semipermeable membrane appears
When ions that cannot pass through the semipermeable membrane appear
Choose the correct answer:
Food provides heat just like fuel provides heat.
Heat provided to the body is used to do work and transform into other forms of energy.
Heat generation is a general property of living organisms.
Primary heat is generated by the hydrolysis of ATP
What are the characteristics of entropy in a system?
Minimum entropy equilibrium state
Depends on the transformation process
Depends on the state of the system
For reversible processes in an isolated system dS<0
What are the characteristics of entropy in a system?
It is a state function and depends on the process of state change.
It is a state function and depends on the time of action.
The change in entropy only depends on the initial and final states of the system.
The change in entropy does not depend on the initial and final states of the system.
Which is a state function in thermodynamics?
Mechanical work
Heat
Chemical work
Entropy
When does an isolated system reach thermal equilibrium?
Free energy reaches a maximum
Binding energy reaches a maximum
Entropy reaches a minimum
Internal energy reaches a maximum
What processes can occur in an isolated system?
Process that increases entropy to a maximum
Order of the system increases to a maximum
Gradients in the system increase to a maximum
Free energy increases to a maximum
What are the characteristics of a self-evolving isolated system?
Free energy always increases
Entropy remains constant or decreases
Order does not increase
Binding energy remains constant
Choose the correct statement.
The binding energy of the system can be converted into work.
The free energy of the system is minimal, then the ability to do work is maximal.
The free energy of the system is minimal, then the ability to do work is minimal.
The binding energy of the system is maximal, then the ability to do work is maximal.
Choose the correct statement:
What is the correct statement regarding the efficiency of a Carnot engine?
The efficiency of a Carnot engine depends on the agent.
The efficiency of a Carnot engine depends on the temperature of the hot and cold reservoirs.
The efficiency of a Carnot engine can reach 100%.
The human body operates like a Carnot engine.
What characteristic does the energy conversion process in the body have?
70% of energy is converted into heat energy to maintain body temperature.
The body does not directly receive light energy.
There is always a portion of energy converted into heat energy.
Chemical energy must be converted into heat energy before it can be converted into mechanical energy.
What form of energy can exist in the body?
Respiratory work
Chemical work
Heat energy
Mechanical energy
What type of thermodynamic system does the organism belong to?
Open system
Closed system
Isolated system
Closed system
What is the characteristic of primary heat?
It is positive heat.
It is released when breaking rich energy bonds in the body.
It is not released during the work process to perform physiological functions: respiration, digestion, muscle contraction...
It is the inevitable dispersion of thermal energy in the metabolic process.
What is the characteristic of secondary heat in the body?
It is basic heat.
It is released when breaking rich energy bonds in the body.
It is the inevitable dispersion of thermal energy in the metabolic process.
It is generated immediately when the body absorbs oxygen and food.
What type of gradient is related to the generation of nerve impulses in the body?
Osmotic gradient
Membrane gradient
Electrical gradient
What type of gradient is related to the generation of nerve impulses in the body?
Osmotic gradient
Membrane gradient
Electrochemical gradient
Concentration gradient
Choose the correct statement:
Due to the unity of the body, the energy released from ATP in different tissues will be the same in the same physiological state.
The heat generated when converting ATP energy into mechanical work is primary heat.
In living organisms with suitable temperature and humidity, primary heat is zero.
Secondary heat is the heat released due to the process of absorbing energy from food, nutrients into ATP.
What is the complete statement of the First Law of Thermodynamics?
Heat transferred to the system is used to increase internal energy and convert to work done by external forces on the system.
Work done on the system is used to increase internal energy and convert to heat done by the system on external forces.
Heat transferred to the system is used to increase internal energy and convert to work done by the system on external forces.
The internal energy of the system is used to convert to work done by the system on external forces.
The general expression of the First Law of Thermodynamics is:
δA=δQ−dU
δQ=dU+δA
δQ=dU
U2=U1
The expression of the First Law applied to an isolated system is:
dU=0
δQ=δA≠0
δQ≠0,δA=0
δQ=0,δA≠0
When δQ=0, the expression of the First Law of Thermodynamics becomes:
δA=dU
δA=−dU
δA≥dU
δA≤−dU
When dU=0, the expression of the First Law of Thermodynamics becomes:
δA=−δQ
δA=δQ
δA≥δQ
δA≤−δQ
When δA=0, the expression of the First Law of Thermodynamics becomes:
δQ=−dU
δA≥−dU
δA≤−dU
δQ=dU
In living organisms, free energy is formed thanks to
When δA=0, the first law of thermodynamics becomes:
δQ=−dU
δA≥−dU
δA≤−dU
δQ=dU
In living organisms, free energy is formed through which process?
Absorption of nutrients
Decomposition of nutrients
Performing mechanical work
The process of absorbing heat to warm up
Choose the correct answer:
Food only provides heat for the body to warm up
Heat supplied to the system is only used to do work
In living organisms, the main energy source is the chemical energy of food.
Primary heat generated by ATP decomposition
Choose the correct answer:
Heat is a state function of living systems
Heat transferred to the system increases the internal energy of the system and converts into work done on the environment.
Heat is a form of energy associated with the chaotic motion of particles in the system.
Secondary heat generated during the process of receiving oxygen and food.
What characteristic does the work process in living organisms have?
The binding energy in the body converts into work done on the environment
The free energy of the system approaches a minimum value, then the ability to do work of the system is the greatest.
Work generated by changes in internal energy and changes in the entropy of the system.
The work process is not accompanied by heat release
Which expression is the heat balance equation for living organisms?
ΔA = ΔQ + ΔE + ΔM
ΔA = ΔE + ΔQ + ΔM
ΔM = ΔA + ΔE + ΔQ
ΔQ = ΔA + ΔE + ΔM
How many forms of work are there in living organisms?
1
2
3
4
The efficiency of the heart's contraction in heavy laborers can reach approximately?
1.3 - 1.4%
13 - 14%
15 - 20%
20 - 30%
What is the mechanical power of the heart approximately?
1.3-1.4W
13-14W
25-30
What is the efficiency of heart contractions in heavy workers?
1.3 - 1.4%
13 - 14%
15 - 20%
20 - 30%
What is the mechanical power of the heart?
1.3 - 1.4W
13 - 14W
25 - 30W
100W
Assuming a heart contraction frequency of 60 beats/min, what is the power of the ventricle?
0.1 W
0.2 W
1.2 W
1.4 W
What is the total energy metabolism power of the whole body?
1.3 - 1.4W
13 - 14W
25 - 30W
100W
What is the total power of the heart?
1.3W
13W
25W
100W
What expression is used to calculate the work done during heart contractions?
A=F.s=F.s.cosα
A=∫δA
A=∫V.dp
A=∫p.dV
Which formula represents Laplace's law?
p=T(1/r1 + 1/r2)
T=p(1/r1 + 1/r2)
T=p.r
T=F/l
When the heart muscle is dilated, how does the energy used to generate heart muscle tension change?
Unchanged
Decreased
Increased
Continuously variable without rule
Where does ATP, which provides energy for heart activity, come from?
Glucose
Phosphoryl
Phosphocreatine
Phospholipid
Where does the energy for the work process in living organisms come from?
From heat exchange with the environment
From internal energy changes in the body
From heat absorption from any heat source
From oxygen exchange between organs in the body
Which of the following is not a characteristic of living organisms?
Secondary heat generation during work
Composed of proteins and substances forming the body
Directly absorbing heat from the environment to do work
Osmotic work during substance transport across cell membranes
What expression determines the work done during muscle contraction in living organisms?
A=F.s
A=
What is the expression that defines work during muscle contraction in living organisms?
A=F⃗.s
A=∫δA2 1
A=∫F(x).dx2 1
A=∫F.ds2 1
According to the experimental graph of muscle contraction, which expression is approximately correct for work during muscle contraction?
A=0.45.Fmax.xmax
A=0.45.Fmin.xmin
A=0.45.Fmax.∆xmax
A=0.45.Fmin.∆xmin
What is the efficiency of muscle contraction approximately?
1.3 - 1.4%
13 - 14%
15 - 16%
20 - 30%
At what age does the highest muscle contraction efficiency occur?
20-24 years
25-28 years
29-30 years
33-35 years
Where is ATP synthesized during muscle contraction?
Lipid
Protid
Phosphoryl
Phosphocreatin
What factors does the efficiency of muscle contraction depend on?
Gender
Height
Weight
Type of work
Choose the correct statement:
All processes of work in cells use energy from ATP
The efficiency of muscle contraction does not depend on age
The greater the work done by muscles, the slower fatigue appears
The primary heat released during ATP hydrolysis
What is the characteristic of the body in a steady state?
The entropy of living organisms is a constant quantity
The rate of increase of entropy in the body equals the rate of exchange of entropy with the surrounding environment
To maintain a steady state, it is not necessary to exchange substances with the surrounding environment
When transitioning from one steady state to another, the entropy of the system always increases
In which type of system does a steady state occur?
Open system
Closed system
Isolated system
Cohesive system
How does entropy change in an isolated system?
Unchanged
Increased
Decreased
Constant
What type of system does the stopping state occur in?
Open system
Closed system
Isolated system
Cloistered system
How does entropy change in an isolated system?
Unchanged
Decreases to a minimum
Increases to a maximum
Increases and decreases unpredictably
Choose the correct answer:
In an isolated system: binding energy always increases, free energy remains unchanged
Free energy is a quantity characteristic of the system's ability to do work
Gradient is a quantity characteristic of the change in direction of some quantity over time
The change in entropy in living organisms is always positive
State the Second Law of Thermodynamics?
The order of a system can only be maintained or decreased.
The order of an isolated system can only be maintained or decreased.
The order of an isolated system can only be maintained or increased.
The order of an isolated system does not change
What is the expression for free energy?
F = U + T.S
F = U - T.S
F = T + U.S
F = T.U + S
When does an isolated system reach thermal equilibrium?
Binding energy reaches a maximum
Free energy reaches a maximum.
Temperature reaches a maximum
Internal energy reaches a maximum
What characteristic does a self-evolving isolated system have?
Free energy increases to a maximum value and then stops.
Order increases to a maximum value and then stops.
Entropy increases to a maximum value and then stops.
Binding energy decreases to a minimum value and then stops
What characteristic does the parameter of the stopping state have?
Increases over time
Decreases over time
Remains unchanged over time
Unstable over a long time
Choose the correct answer
The stopping state is a state of thermal equilibrium
The stopping state is a state of chemical equilibrium
The stopping state is
What is the correct answer regarding the equilibrium state?
The stationary state is a thermodynamic equilibrium state
The stationary state is a chemical equilibrium state
The stationary state only occurs in closed systems
The stationary state only occurs in open systems
What are the characteristics of the stationary state?
Gradients decrease gradually
Gradients increase gradually
Gradients remain constant
Gradients vary, sometimes increasing and sometimes decreasing
At what age is the excess shift step most commonly observed?
Young people
Elderly people
Middle-aged people
Sick people
What are the characteristics of the evolution of the stationary state?
The stability of the system decreases
The stability of the system increases
The stability of the system remains unchanged
Unrelated to the stability of the system
Write the expression representing the change in entropy of a living system?
dS = dS_i - dS_e
dS = dS_i - 2dS_e
dS = dS_i + dS_e
dS = dS_i + 2dS_e
How is the change in entropy calculated when the living system is isolated?
dS = dS_i
dS = dS_e
dS = -dS_i
dS = -dS_e
What is the characteristic of the change in entropy of a living body when the system is developing structure?
dS_i = dS_e
|dS_e| > |dS_i|
|dS_e| < |dS_i|
dS_e = -dS_i
What are the characteristics of a living system in a stationary state?
dS > 0
dS = -dS_e = C ≠ 0
dS = 0
dS_e < 0
State the Second Law of Thermodynamics?
The order of an isolated system can only remain constant or increase.
There cannot exist in nature a cycle whose only result is to convert heat into work without leaving any trace in the surrounding environment.
In isolated systems, only processes that lead to an increase in entropy can occur spontaneously, and their limit is the state with maximum entropy.
Spontaneous processes
What property does the entropy function have?
It is a function of the transformation process
It is a characteristic quantity for the state of the system
It is a characteristic quantity for the system's ability to do work.
It is a characteristic quantity for the system's ability to generate heat.
Write the expression representing the rate of change of entropy of a living system?
dS/dt = dS_i/dt - dS_e/dt
dS/dt = dS_i/dt + dS_e/dt
dS/dt = dS_i/dt - 2dS_e/dt
dS/dt = dS_i/dt + 2dS_e/dt
At what age is the transition near the exponential function observed?
Children
Young people
Middle-aged people
Sick people
With what level of artificial starting point is the transition observed in which person?
Children
Young people
Middle-aged people
Sick people
What is the method of heat exchange of the body?
Muscle movement
Digestion
Convection heat transfer
Basic metabolism
What is the method of heat resistance of the body?
Vasoconstriction
Goosebumps
Muscle movement
Sweating
What is the direction of the surface tension force of the liquid?
Increases the surface area of the liquid
Reduces the surface area of the liquid
Keeps the surface of the liquid stable.
Keeps the surface of the liquid horizontal.
Under what circumstances does the rise of liquid in a capillary tube increase?
Gravitational acceleration increases
The specific weight of the liquid increases
Increase the inner diameter of the capillary tube
Decrease the inner diameter of the capillary tube.
The water flow in a horizontal pipe is 40π cm³/second. What is the question?
The flow rate of water in a horizontal pipe is 40π cm³/second. The speed of the liquid at a point in the pipe with a diameter of 2cm is:
4.5m/h
40m/s
0.045 m/s
40cm/s
Water flows in a horizontal pipe with a speed of 4m/s at a section with a diameter of 4cm. The speed of water flowing at a section with a diameter of 8cm is:
6m/s
1.5m/s
2m/s
1m/s
The characteristic of liquid pressure in a horizontal flow pipe is:
Static pressure is inversely proportional to dynamic pressure
Dynamic pressure is inversely proportional to the speed of the liquid
Where dynamic pressure is high, static pressure is low and vice versa
Hydrostatic pressure does not depend on the specific weight of the liquid
Choose the correct statement:
If the interaction force between solid particles and liquid is stronger than the interaction force between liquid particles, then there is a wetting phenomenon.
If the interaction force between solid particles and liquid is stronger than the interaction force between liquid particles, then there is a non-wetting phenomenon.
Wetting or non-wetting is a consequence of solid-liquid interaction.
When the attraction force of liquid particles to each other is greater than the attraction force of gas particles to the liquid, then there is a non-wetting phenomenon.
The tube used as a capillary must satisfy the condition:
Small cross-section, open at both ends and not wet by water.
Small cross-section open at one end and not wet by water.
Small cross-section, open at both ends.
Small cross-section, open at both ends and wet by water.
The condition for equilibrium of a lever is:
The total moment of the resistance force and the driving force must be zero.
The sum of the resistance force and the driving force must be zero.
The total moment of the resistance force and the driving force is a constant.
What is the principle of the lever?
The total moment of the resistance force and the driving force must be zero.
The sum of the resistance force and the driving force must be zero.
The total moment of the resistance force and the driving force is a constant.
The sum of the resistance force and the driving force is a constant.
The type of lever that keeps our head balanced on the spine has the characteristic:
The application points of the resistance force and the driving force are on two sides of the fulcrum.
The application point of the resistance force is between the fulcrum and the application point of the driving force.
The application point of the driving force is between the fulcrum and the application point of the resistance force.
The application point of the driving force is closer to the fulcrum than the application point of the resistance force.
What is the driving force of the process of osmosis?
Osmotic pressure
Molecular pressure
Internal pressure
Tension
What characteristic does the osmotic pressure of a solution have?
It only depends on the concentration of the solution and does not depend on the nature of the solution or the nature of the solute.
It has the effect of drawing solvent towards the solution.
It does not depend on temperature.
It increases as the size of the solute molecules increases.
When does Donald's equilibrium occur in two electrolyte solutions separated by a semipermeable membrane?
The number of particles passing through the membrane from both sides is equal and both sides of the membrane are electrically neutral.
At least one type of ion of the macromolecule cannot pass through the membrane, the number of particles passing through the membrane from both sides is equal and both sides of the membrane are not electrically neutral.
At least one type of ion of the macromolecule cannot pass through the membrane, the number of particles passing through the membrane from both sides is equal and both sides of the membrane are electrically neutral.
At least one type of ion of the macromolecule cannot pass through the membrane, the number of particles passing through the membrane from both sides is different and both sides of the membrane are electrically neutral.
To extract pus, bacteria, and degradation products from a wound, people often bandage the wound.
To extract pus, what type of solution is commonly used to bandage wounds?
Hypotonic
Isotonic
Hypertonic
Any concentration
To compensate for water loss due to diarrhea, what type of solution is introduced into the body?
Hypotonic compared to blood
Isotonic compared to blood
Hypertonic compared to blood
Any concentration
Which environmental factor increases the rate of diffusion?
Diffusion time
Temperature
Viscosity coefficient
Size of solute
The diffusion coefficient does not depend on which factor?
Nature of solvent or gas.
Size and shape of diffusing molecules
Temperature of the solvent environment
Concentration gradient
What is the essence of the diffusion phenomenon?
Chaotic thermal motion leading to a state of equal molecular kinetic density everywhere
Chaotic thermal motion with a preferred direction leading to a state of equal molecular temperature everywhere
Chaotic thermal motion without a preferred direction leading to a state of equal molecular density everywhere
Chaotic thermal motion without a preferred direction leading to a state of equal molecular pressure everywhere
What is the expression of Fick's law?
dn = D.S.gradC.dt
dn = -D.S.gradC.dt
dn = D.S.gradC/dt
dn = -D.S.gradC/dt
What is the characteristic of diffusion through a freely permeable porous membrane?
It does not depend on the diameter of the solute molecules.
gradC is directly proportional to the thickness of the porous membrane
gradC is inversely proportional to the thickness of the porous membrane
The membrane coefficient does not depend on the size of the membrane
What changes occur in the environment after molecules have diffused for a while?
Concentration gradient of the diffusing substance increases
Concentration gradient of the diffusing substance approaches 0
Density of the diffusing substance increases
Density of the diffusing substance decreases
Which factor of the environment decreases the rate of the diffusion process?
Diffusion time
Diffusion window area
Viscosity coefficient
Size of the solute
What formula is used to calculate the work done in the respiration process?
A=F.s =F.s.cosα
A=∫δA2 1
A=∫p.dV V2 V1
A=∫p.dV v1 v2
What is the approximate value of the work of respiration performed in one minute in an adult?
0.1 ÷ 0.59J
0.59 ÷ 0.98J
0.98 ÷ 4.9J
4.9 ÷ 13J
What formula is used to calculate the volume of gas diffusing in simple diffusion?
V=k.pn/p
V=R.n.T/p
V=R.T.p/n/p
V=k.T.lnS
What is the characteristic of the pressure of a liquid?
Independent direction with the orientation of the curved surface
Magnitude inversely proportional to the density of the liquid and the curvature of the surface
Magnitude depends on the nature of the liquid and the curvature of the surface
Tangent to the surface
Why must air be expelled from the syringe before injecting the patient?
Unclean air must be completely removed
To prevent the injection site from swelling and causing rupture
To avoid air bubbles that hinder blood flow in the vessel.
To make the patient feel less pain and more comfortable
In which case does a blood vessel obstruction occur due to air bubbles in the vessel?
When the blood vessel is injured and air enters
After intravenous injection for the patient but before expelling all air
In which case does gas embolism occur?
When a blood vessel is cut and air enters
After intravenous injection when air is pushed out
Astronauts flying at high altitudes with an open cockpit
Divers ascending slowly to the surface
When the temperature increases, the viscosity coefficient of Newtonian fluids:
decreases
increases
first increases, then decreases
first decreases, then increases
Fluids consist of:
Liquids and gases
Solids, liquids, and gases
Solids and liquids
Liquids, gases, and plasma
An ideal fluid is:
A fluid that maintains the ideal state of the body
A fluid that provides protection for organs
A fluid with a constant volume under external pressure
A fluid that supplies substances to maintain body functions
For an ideal fluid at rest, the flow rate through different cross-sections of a pipe:
is the same and equal to a constant
always fluctuates over time
has different values and is directly proportional to the pipe's cross-section
has different values and is inversely proportional to the pipe's cross-section
For an ideal fluid at rest in a horizontal pipe:
static pressure increases where flow speed is slow.
static pressure decreases where flow speed is slow.
static pressure remains constant.
static pressure decreases from the start to the end of the pipe.
What factors does the viscosity coefficient of real fluids depend on?
Temperature, nature of the fluid
Nature of the fluid, flow speed
Flow speed, temperature of the fluid
Position of the layers of fluid flowing and nature of the fluid
The internal friction force between two layers of fluid moving at a considerable speed:
The internal friction force between two layers of liquid moving at different speeds depends on the nature of the liquid, and:
Flow velocity and temperature of the liquid
Relative velocity and contact area of the two layers of liquid
Flow rate of the liquid and thickness of the liquid layer
Flow velocity of the liquid and area of the adjacent liquid layers
The Stokes formula determines the internal friction force as:
F_ms = 3π.η.r.v
F_ms = 4π.η.r.v
F_ms = 5π.η.r.v
F_ms = 6π.η.r.v
The formula determining the speed of the liquid layer actually moving in a horizontal cylindrical pipe is:
v = ∆p / (8lη) (R^2 - r^2)
v = ∆p / (8lη) (R - r)^2
v = ∆p / (4lη) (R^2 - r^2)
v = ∆p / (4lη) (R - r)^2
The speed of the liquid layer moving at the axis of a horizontal cylindrical pipe is:
v_0 = ∆p.R^2 / (2lη)
v_0 = ∆p.R^2 / (4lη)
v_0 = ∆p.R / (4lη)
v_0 = ∆p.R / (2lη)
The Poiseuille formula determines the flow rate of liquid actually flowing in a horizontal cylindrical pipe as:
Q = π∆pR / (8lη)
Q = π∆pR^2 / (8lη)
Q = π∆pR^3 / (8lη)
Q = π∆pR^4 / (8lη)
What is the formula for determining the Reynolds number (Re)?
Re = ρR / (ηv)
Re = ρR^2 / (ηv)
Re = 2ρR / (ηv)
Re = 4ρR / (ηv)
At what value of the Reynolds number (Re) does laminar flow occur?
Re ≤ 3300
Re ≤ 3000
Re ≤ 2600
Re ≤ 2300
What is the main cause of the sound of the heart?
The flow of blood in the aorta
The flow of blood near the heart valve
Changes in the frequency of heart muscle contractions
Changes in the acoustic conductivity of the tissue
Blood moves with a maximum flow rate:
At the blood vessel wall
In the middle of the blood vessel
At a position halfway from the wall of the vessel
Blood moves with maximum flow velocity:
at the blood vessel wall
in the middle of the blood vessel
at a position halfway from the wall by half the radius of the vessel
at a position a quarter of the radius from the wall
An ideal fluid at rest in a pipe, where the pipe narrows, the static pressure:
increases
decreases
first increases, then decreases
first decreases, then increases
An ideal fluid at rest in a pipe, where the pipe diameter increases, the static pressure:
increases
decreases
first increases, then decreases
first decreases, then increases
For an ideal fluid where the pipe diameter doubles, the flow velocity:
decreases by 4 times
decreases by half
increases by 2 times
doubles
The motion of an ideal fluid where the pipe diameter decreases by half, the flow velocity:
decreases by 4 times
decreases by half
increases by 2 times
doubles
The speed of water in the wide part of a horizontal water pipe is 50 cm/s, what is the speed where the diameter is reduced by half?
25 cm/s
12.5 cm/s
8.0 cm/s
4.0 cm/s
The flow rate of water in a horizontal pipe is 40π cm³/second. The speed of the fluid at a point in the pipe with a diameter of 2cm is:
4.5 m/h
40 m/s
0.045 m/s
40 cm/s
Water flows in a horizontal pipe with a speed of 4m/s at a section with a diameter of 4cm. The speed of water flowing at a section with a diameter of 8cm is:
6m/s
1.5m/s
2m/s
1m/s
The flow rate of the fluid is:
