Podcast
Questions and Answers
What does the symbol $F$ represent in the equation $F = μN$?
What does the symbol $F$ represent in the equation $F = μN$?
- Frictional force in newtons (correct)
- Force in joules
- Coefficient of friction
- Normal force in newtons
Which equation relates initial and final velocities with acceleration and time?
Which equation relates initial and final velocities with acceleration and time?
- $s = vot + \frac{1}{2}at^2$
- $F1D1 = F2D2$
- $v^2 = vo^2 + 2as$
- $v = vo + at$ (correct)
What does the term $P.E.$ stand for in the equation $P.E. = mgh$?
What does the term $P.E.$ stand for in the equation $P.E. = mgh$?
- Pressure energy
- Potential energy (correct)
- Power energy
- Position energy
What is the gravitational acceleration (g) value used in the potential energy formula?
What is the gravitational acceleration (g) value used in the potential energy formula?
What does the equation $K.E. = \frac{1}{2}mv^2$ represent?
What does the equation $K.E. = \frac{1}{2}mv^2$ represent?
In the equation $s = vot + \frac{1}{2}at^2$, what does $s$ represent?
In the equation $s = vot + \frac{1}{2}at^2$, what does $s$ represent?
In the formula $v^2 = vo^2 + 2as$, which variable represents acceleration?
In the formula $v^2 = vo^2 + 2as$, which variable represents acceleration?
Which variable is NOT included in the equation for kinetic energy $K.E. = \frac{1}{2}mv^2$?
Which variable is NOT included in the equation for kinetic energy $K.E. = \frac{1}{2}mv^2$?
In the relationship $F1D1 = F2D2$, what do $D1$ and $D2$ represent?
In the relationship $F1D1 = F2D2$, what do $D1$ and $D2$ represent?
What is incorrect about using $s$ in the formula $s = vot + \frac{1}{2}at^2$ if acceleration is zero?
What is incorrect about using $s$ in the formula $s = vot + \frac{1}{2}at^2$ if acceleration is zero?
What does the coefficient of entry loss (Ce) represent in the context of ventilation?
What does the coefficient of entry loss (Ce) represent in the context of ventilation?
How is the total pressure (TP) in a ventilation system calculated?
How is the total pressure (TP) in a ventilation system calculated?
Which variable is NOT included in the formula for calculating the effective rate of ventilation (Q′)?
Which variable is NOT included in the formula for calculating the effective rate of ventilation (Q′)?
What does the term 'velocity pressure (VP)' refer to in air flow dynamics?
What does the term 'velocity pressure (VP)' refer to in air flow dynamics?
In the equation C = (Pv × 10^6) / Pb, what does C represent?
In the equation C = (Pv × 10^6) / Pb, what does C represent?
What is the main purpose of the design distribution constant (K) in ventilation equations?
What is the main purpose of the design distribution constant (K) in ventilation equations?
Which equation correctly represents the relationship of the concentration over time?
Which equation correctly represents the relationship of the concentration over time?
What does the flow rate (Q) formula Q = (constant × SG × ER) / (MW × C) indicate?
What does the flow rate (Q) formula Q = (constant × SG × ER) / (MW × C) indicate?
In the equation F = P(1 + i)^n, what does F represent?
In the equation F = P(1 + i)^n, what does F represent?
What does Pf = 1 − R(t) signify in reliability analysis?
What does Pf = 1 − R(t) signify in reliability analysis?
What does the equation $L_w = 10 \log_{10}(\frac{W}{W_o})$ calculate?
What does the equation $L_w = 10 \log_{10}(\frac{W}{W_o})$ calculate?
In the formula for sound pressure level, what is the reference sound pressure level ($p_o$)?
In the formula for sound pressure level, what is the reference sound pressure level ($p_o$)?
What does the variable $T$ represent in the equation $T = \frac{L - 90}{5}$?
What does the variable $T$ represent in the equation $T = \frac{L - 90}{5}$?
How is radiation intensity related to distance from the source, according to the equation $I_2 = I_1(\frac{d_1}{d_2})^2$?
How is radiation intensity related to distance from the source, according to the equation $I_2 = I_1(\frac{d_1}{d_2})^2$?
What does the term $D$ signify in the dosage equation $D = 100 \sum_{i=1}^{N} C_i/T_i$?
What does the term $D$ signify in the dosage equation $D = 100 \sum_{i=1}^{N} C_i/T_i$?
What does the equation $TWA = 16.61 \log_{10}(\frac{D}{100}) + 90$ calculate?
What does the equation $TWA = 16.61 \log_{10}(\frac{D}{100}) + 90$ calculate?
What is the purpose of using $\beta$ in the equation $I = \beta I_0 e^{-\mu x}$?
What is the purpose of using $\beta$ in the equation $I = \beta I_0 e^{-\mu x}$?
In the noise reduction equation $dB = 10 \log_{10}(\frac{A_2}{A_1})$, what do $A_1$ and $A_2$ represent?
In the noise reduction equation $dB = 10 \log_{10}(\frac{A_2}{A_1})$, what do $A_1$ and $A_2$ represent?
Which variable in the equation $W = \frac{16 P}{\pi D^2}$ is responsible for the power density?
Which variable in the equation $W = \frac{16 P}{\pi D^2}$ is responsible for the power density?
What does the equation $dB_1 = dB_0 - 20 \log_{10}(\frac{d_0}{d_1})$ allow you to calculate?
What does the equation $dB_1 = dB_0 - 20 \log_{10}(\frac{d_0}{d_1})$ allow you to calculate?
What does the spring constant (k) represent in the context of elastic potential energy?
What does the spring constant (k) represent in the context of elastic potential energy?
Which formula correctly describes the relationship between force, mass, and acceleration?
Which formula correctly describes the relationship between force, mass, and acceleration?
If the recommended weight limit (RWL) formula includes multiple multipliers, what is the role of the horizontal multiplier (HM)?
If the recommended weight limit (RWL) formula includes multiple multipliers, what is the role of the horizontal multiplier (HM)?
In the equation for work done on an object due to gravity, which variable represents gravity's constant value?
In the equation for work done on an object due to gravity, which variable represents gravity's constant value?
What does ppm stand for in the context of gas concentration?
What does ppm stand for in the context of gas concentration?
What is the purpose of using the Lower Flammability Limit (LFL) in chemical mixtures?
What is the purpose of using the Lower Flammability Limit (LFL) in chemical mixtures?
In the ideal gas law PV = nRT, what does the variable R represent?
In the ideal gas law PV = nRT, what does the variable R represent?
What does the abbreviation SPfan refer to in the context of fan static pressure?
What does the abbreviation SPfan refer to in the context of fan static pressure?
In the work equation W = Fs, what does the variable 's' represent?
In the work equation W = Fs, what does the variable 's' represent?
Flashcards
Frictional Force
Frictional Force
The force that opposes motion between two surfaces in contact.
Coefficient of Friction
Coefficient of Friction
A measure of how much two surfaces resist sliding against each other.
Normal Force
Normal Force
The force acting perpendicular to a surface.
Work
Work
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Kinetic Energy
Kinetic Energy
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Potential Energy
Potential Energy
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Acceleration
Acceleration
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Displacement
Displacement
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Momentum
Momentum
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Energy
Energy
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Elastic potential energy
Elastic potential energy
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Spring constant (k)
Spring constant (k)
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Amount of compression (x)
Amount of compression (x)
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Mass (m)
Mass (m)
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Acceleration (a)
Acceleration (a)
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Momentum (ρ)
Momentum (ρ)
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Force (F)
Force (F)
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Work done by gravity (W)
Work done by gravity (W)
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Work (W)
Work (W)
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Lifting Index (LI)
Lifting Index (LI)
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Hood Entry Loss (he)
Hood Entry Loss (he)
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Coefficient of Entry Loss (Ce)
Coefficient of Entry Loss (Ce)
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Velocity Pressure (VP)
Velocity Pressure (VP)
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Actual Ventilation Rate (Q)
Actual Ventilation Rate (Q)
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Specific Gravity (SG)
Specific Gravity (SG)
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Evaporation Rate (ER)
Evaporation Rate (ER)
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Design Distribution Constant (K)
Design Distribution Constant (K)
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Molecular Weight (MW)
Molecular Weight (MW)
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Desired Concentration at Time t (C)
Desired Concentration at Time t (C)
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Total Pressure (TP)
Total Pressure (TP)
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Combined Sound Pressure Level (Lpt)
Combined Sound Pressure Level (Lpt)
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Individual Sound Pressure Level (Lpi)
Individual Sound Pressure Level (Lpi)
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Sound Power Level (Lw)
Sound Power Level (Lw)
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Sound Pressure Level (Lp)
Sound Pressure Level (Lp)
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Time Allowed for Exposure (T)
Time Allowed for Exposure (T)
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Dosage (D)
Dosage (D)
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Calculated Sound Level at Different Distance (dB1)
Calculated Sound Level at Different Distance (dB1)
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Time Weighted Average (TWA)
Time Weighted Average (TWA)
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Noise Reduction (dB)
Noise Reduction (dB)
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Noise Reduction (NR)
Noise Reduction (NR)
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Study Notes
Mechanics Equations
- Frictional Force (F): F = μN (μ = coefficient of friction, N = newtons)
- Forces and Distances: F₁D₁ = F₂D₂
- Force (F): Measured in newtons
- Distance (D): Measured in meters
- Velocity (v): v = v° + at (v° = original velocity, a = acceleration, t = time)
- Displacement (s): s = vt + (at²)/2 (v = initial velocity)
- Final Velocity (v): v² = v°² + 2as (v° = initial velocity, a = acceleration)
- Acceleration (a): the rate of change of velocity (meters per second squared)
Energy Equations
- Kinetic Energy (K.E.): K.E. = (mv²)/2 (m = mass, v = velocity)
- Potential Energy (P.E.): P.E. = mgh (m = mass, g = acceleration due to gravity, h = height)
- Elastic Potential Energy (P.E.): P.E. = (kx²)/2 (k = spring constant, x = amount of compression)
- Momentum (p): p = mv (m = mass, v = velocity)
Other Equations
- Force (F): F = ma (m = mass, a = acceleration)
- Work (W): W = Fs (F = force, s = distance)
- Amount of Work from Gravity: W = mg (m = mass, g = gravitational acceleration
- Ergonomics (Lifting Index): LI = L/RWL (LI = lifting index, RWL = recommended weight limit. RWL = LC × HM × VM × DM × AM × FM × CM (factors for further calculation))
Heat Stress and Relative Humidity
- Indoor Heat Stress: 0.7WB + 0.3GT (WB = wet-bulb temperature, GT = globe temperature)
- Outdoor Heat Stress: 0.7WB + 0.2GT = 0.1DB (WB = wet-bulb temperature, GT = globe temperature, DB = dry-bulb temperature)
Concentrations of Vapors and Gases
- ppm (Parts per Million): ppm = mg/m³ * 24.45 / MW (mg/m³ = measured mg/m³ of the contaminant, MW = molecular weight of the contaminant)
- TLV (Threshold Limit Value): TLV = f₁/TLV₁ + f₂/TLV₂ +... + fₙ/TLVn (fi = fraction of chemical in the mixture, TLV = threshold limit value of the chemical)
- LFL (Lower Flammability Limit): LFLm = f₁/LFL₁ + f₂/LFL₂ +... + f/LFLn
Ventilation
- Volumetric Flow Rate (Q): Q = VA (V = air velocity, A = cross-sectional area of duct)
- Velocity (V): V = 4005√SP₁ (C = coefficient of entry loss, SP₁ = static pressure of hood)
- Static Pressure (SP): SP = VP + he (VP = duct velocity pressure, he = overall hood entry loss)
Additional Considerations
- For calculations involving corrections (e.g., incomplete mixing, corrections for sound pressure), consult the relevant section in the text.
- Units (e.g., meters, newtons, kilograms) are essential for accurate calculation or reference.
- Specific values for constants (e.g., g, K) and variables (e.g., temperatures) should be noted.
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Description
Test your knowledge on fundamental mechanics and energy equations. This quiz covers topics such as frictional force, velocity, kinetic and potential energy, and momentum. Perfect for students looking to reinforce their understanding of physics concepts.
