Podcast
Questions and Answers
On a distance-time graph, what does the slope of the line represent?
On a distance-time graph, what does the slope of the line represent?
- Time
- Displacement
- Velocity (correct)
- Acceleration
A changing slope on a velocity-time graph indicates constant velocity.
A changing slope on a velocity-time graph indicates constant velocity.
False (B)
Define the term 'vector' and provide an example of a vector quantity.
Define the term 'vector' and provide an example of a vector quantity.
A vector is a quantity that has both magnitude and direction. Example: velocity, displacement, force or acceleration.
The formula that relates final velocity ($v_f$), initial velocity ($v_i$), acceleration ($a$), and displacement ($\Delta x$) is $v_f^2 = v_i^2 + 2 \cdot a \cdot$ ______.
The formula that relates final velocity ($v_f$), initial velocity ($v_i$), acceleration ($a$), and displacement ($\Delta x$) is $v_f^2 = v_i^2 + 2 \cdot a \cdot$ ______.
Match each type of energy with its correct description:
Match each type of energy with its correct description:
What is 'waste energy' in the context of energy efficiency?
What is 'waste energy' in the context of energy efficiency?
The number 0.005020 has three significant digits.
The number 0.005020 has three significant digits.
Convert 25 degrees Celsius to Kelvin. (Assume the equation is $K = C + 273.15$)
Convert 25 degrees Celsius to Kelvin. (Assume the equation is $K = C + 273.15$)
In a boiler, ______ energy from burning fuel is converted into thermal energy to heat water and produce steam.
In a boiler, ______ energy from burning fuel is converted into thermal energy to heat water and produce steam.
Match each engine type with its typical application:
Match each engine type with its typical application:
Which of the following is an example of a non-renewable energy resource?
Which of the following is an example of a non-renewable energy resource?
Two objects are represented on the same distance-time graph. If object A has a steeper slope than object B, what can you conclude?
Two objects are represented on the same distance-time graph. If object A has a steeper slope than object B, what can you conclude?
Displacement is a scalar quantity because it only considers the distance between the starting and ending points.
Displacement is a scalar quantity because it only considers the distance between the starting and ending points.
A car accelerates from rest to 20 m/s in 5 seconds. Calculate the acceleration. (Assume constant acceleration)
A car accelerates from rest to 20 m/s in 5 seconds. Calculate the acceleration. (Assume constant acceleration)
Gravitational potential energy is calculated using the formula $PE = m \cdot g \cdot$ ______, where m is mass and g is the acceleration due to gravity.
Gravitational potential energy is calculated using the formula $PE = m \cdot g \cdot$ ______, where m is mass and g is the acceleration due to gravity.
Match each energy conversion with its example:
Match each energy conversion with its example:
Which of the following best describes the first law of thermodynamics?
Which of the following best describes the first law of thermodynamics?
A diesel engine is generally more fuel-efficient than a gasoline engine because it operates at a lower compression ratio.
A diesel engine is generally more fuel-efficient than a gasoline engine because it operates at a lower compression ratio.
Give an example of how solar energy can be converted into electrical energy.
Give an example of how solar energy can be converted into electrical energy.
The efficiency of an energy conversion process is defined as the ratio of useful energy output to total energy ______.
The efficiency of an energy conversion process is defined as the ratio of useful energy output to total energy ______.
Flashcards
Distance-Time Graph
Distance-Time Graph
A graph showing distance traveled over time. Slope indicates speed.
Velocity-Time Graph
Velocity-Time Graph
A graph showing velocity changes over time. Slope indicates acceleration.
Slope of Distance-Time Graph
Slope of Distance-Time Graph
The slope of a distance-time graph represents the average velocity. Calculated as change in distance divided by change in time.
Slope of Velocity-Time Graph
Slope of Velocity-Time Graph
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Changing Slope
Changing Slope
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Comparing Slopes
Comparing Slopes
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Vector vs. Scalar
Vector vs. Scalar
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Kinetic Energy
Kinetic Energy
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Potential Energy
Potential Energy
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Efficiency
Efficiency
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Significant Digits
Significant Digits
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Scientific Notation
Scientific Notation
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Energy Conversion
Energy Conversion
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Thermodynamic System
Thermodynamic System
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Boiler Conversions
Boiler Conversions
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Renewable Resources
Renewable Resources
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Nonrenewable Resources
Nonrenewable Resources
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Mechanical Energy
Mechanical Energy
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Study Notes
- Analysis of distance/time and velocity/time graphs is essential.
- Calculations of slopes for both types of graphs are required.
- Interpretation of what the slope represents in each graph type is needed.
- Understanding changing slopes within distance/time and velocity/time graphs is necessary.
- Proficiency to compare different objects' motion on the same graph is important.
- Differentiation between vector and scalar quantities, including their meanings, is needed.
- Application and manipulation of kinematic formulas to solve for unknowns is essential.
- Calculations make up over half the exam.
- Understanding the relationships between mechanical, kinetic, and potential energy is vital.
- Knowledge of efficiency and the connections between total, useful, and waste (lost) energy is important.
- Ability to determine significant digits.
- Skill in unit conversions.
- Use of scientific notation.
- Grasp of energy conversions and the laws of thermodynamics is needed.
- Knowledge of energy conversions inside a boiler is required.
- Familiarity with different types of engines and their relative advantages is needed.
- Understanding of renewable and non-renewable resources, including their energy use and conversion, is essential.
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