Short Answer
1.1 Physics: Definitions and Applications
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Physics aims to explain the fundamental aspects of our universe and how these aspects interact with one another.
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Physics aims to explain the biological aspects of our universe and how these aspects interact with one another.
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Physics aims to explain the composition, structure and changes in matter occurring in the universe.
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Physics aims to explain the social behavior of living beings in the universe.
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Magnetism describes the attractive force between a magnetized object and a metal like iron. Electricity involves the study of electric charges and their movements. Magnetism is not related to the electricity.
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Magnetism describes the attractive force between a magnetized object and a metal like iron. Electricity involves the study of electric charges and their movements. Magnetism is produced by a flow electrical charges.
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Magnetism involves the study of electric charges and their movements. Electricity describes the attractive force between a magnetized object and a metal. Magnetism is not related to the electricity.
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Magnetism involves the study of electric charges and their movements. Electricity describes the attractive force between a magnetized object and a metal. Magnetism is produced by the flow electrical charges.
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Relativistic quantum mechanics unifies quantum mechanics with Einstein’s theory of relativity. The unified theory creates a greater understanding of our universe because it can explain objects of all sizes and masses.
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Relativistic quantum mechanics unifies classical mechanics with Einstein’s theory of relativity. The unified theory creates a greater understanding of our universe because it can explain objects of all sizes and masses.
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Relativistic quantum mechanics unifies quantum mechanics with Einstein’s theory of relativity. The unified theory creates a greater understanding of our universe because it is unable to explain objects of all sizes and masses.
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Relativistic quantum mechanics unifies classical mechanics with the Einstein’s theory of relativity. The unified theory creates a greater understanding of our universe because it is unable to explain objects of all sizes and masses.
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It is because the phenomena it explains are outside the normal range of human experience which deals with much larger objects.
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It is because the phenomena it explains can be perceived easily, namely, ordinary-sized objects.
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It is because the phenomena it explains are outside the normal range of human experience, namely, the very large and the very fast objects.
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It is because the phenomena it explains can be perceived easily, namely, the very large and the very fast objects.
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Physics can explain the traffic on a particular street and help us know about the traffic in advance.
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Physics can explain about the ongoing construction of roads on a particular street and help us know about delays in the traffic in advance.
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Physics can explain distances, speed limits on a particular street and help us categorize faster routes.
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Physics can explain the closing of a particular street and help us categorize faster routes.
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An understanding of force, pressure, heat, electricity, etc., which all involve physics, will help me design a sound and energy-efficient house.
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An understanding of the air composition, chemical composition of matter, etc., which all involves physics, will help me design a sound and energy-efficient house.
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An understanding of material cost and economic factors involving physics will help me design a sound and energy-efficient house.
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An understanding of geographical location and social environment which involves physics will help me design a sound and energy-efficient house.
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Physics is involved in understanding whether the reactants and products dissolve in water.
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Physics is involved in understanding the amount of energy released or required in a chemical reaction.
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Physics is involved in what the products of the reaction will be.
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Physics is involved in understanding the types of ions produced in a chemical reaction.
1.2 The Scientific Methods
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The floor has greater distortions of space-time for moving the sliding box faster than for the box at rest.
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The floor has greater distortions of space-time for the box at rest than for the sliding box.
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The resistance between the floor and the box is less when the box is sliding then when the box is at rest.
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The floor dislikes having objects move across it and therefore holds the box rigidly in place until it cannot resist the force.
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To test the hypothesis, compare the damage to the car by driving it on a smooth road and a gravel road.
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To test the hypothesis, compare the damage to the car by driving it on a smooth road and a dirt road.
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To test the hypothesis, compare the damage to the car by driving it on a gravel road and the dirt road.
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This is not a testable hypothesis.
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Both a physical model and a computer-based model should be built around a hypothesis and could be able to test the hypothesis.
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Both a physical model and a computer-based model should be built around a hypothesis but they cannot be used to test the hypothesis.
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Both a physical model and a computer-based model should be built around the results of scientific studies and could be used to make predictions about the system under study.
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Both a physical model and a computer-based model should be built around the results of scientific studies but cannot be used to make predictions about the system under study.
Explain the advantages and disadvantages of using a model to predict a life-or-death situation, such as whether or not an asteroid will strike Earth.
- The advantage of using a model is that it provides predictions quickly, but the disadvantage of using a model is that it could make erroneous predictions.
- The advantage of using a model is that it provides accurate predictions, but the disadvantage of using a model is that it takes a long time to make predictions.
- The advantage of using a model is that it provides predictions quickly without any error. There are no disadvantages of using a scientific model.
- The disadvantage of using models is that it takes longer time to make predictions and the predictions are inaccurate. There are no advantages to using a scientific model.
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Correct, because laws are theories that have been proved true.
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Correct, because theories are laws that have been proved true.
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Incorrect, because a law is changed if new evidence contradicts it.
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Incorrect, because a law is changed when a theory contradicts it.
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A local law applies only in a specific area, but a scientific law is applicable throughout the universe. Both the local law and the scientific law can change.
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A local law applies only in a specific area, but a scientific law is applicable throughout the universe. A local law can change, but a scientific law cannot be changed.
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A local law applies throughout the universe but a scientific law is applicable only in a specific area. Both the local and the scientific law can change.
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A local law applies throughout the universe, but a scientific law is applicable only in a specific area. A local law can change, but a scientific law cannot be changed.
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Models, theories and laws must be universally valid.
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Models, theories, and laws have only limited validity.
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Models have limited validity while theories and laws are universally valid.
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Models and theories have limited validity while laws are universally valid.
1.3 The Language of Physics: Physical Quantities and Units
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1.23 \times 10^4\,\text{km/h}
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1.23 \times 10^3\,\text{km/h}
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9.5 \times 10^1\,\text{km/h}
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2.05 \times 10^{-1}\,\text{km/h}
Describe the main difference between the metric system and the U.S. Customary System.
- In the metric system, unit changes are based on powers of 10, while in the U.S. customary system, each unit conversion has unrelated conversion factors.
- In the metric system, each unit conversion has unrelated conversion factors, while in the U.S. customary system, unit changes are based on powers of 10.
- In the metric system, unit changes are based on powers of 2, while in the U.S. customary system, each unit conversion has unrelated conversion factors.
- In the metric system, each unit conversion has unrelated conversion factors, while in the U.S. customary system, unit changes are based on powers of 2.
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2\%
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3\%
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4\%
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5\%
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A decrease in the precision of a measurement increases the uncertainty of the measurement, while a decrease in accuracy does not.
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A decrease in either the precision or accuracy of a measurement increases the uncertainty of the measurement.
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An increase in either the precision or accuracy of a measurement will increase the uncertainty of that measurement.
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An increase in the accuracy of a measurement will increase the uncertainty of that measurement, while an increase in precision will not.
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Based on the information, the line has a negative slope. Because its y-intercept is 50 and its slope is negative, this line gradually rises on the graph as the x-value increases.
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Based on the information, the line has a negative slope. Because its y-intercept is 50 and its slope is negative, this line gradually moves downward on the graph as the x-value increases.
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Based on the information, the line has a positive slope. Because its y-intercept is 50 and its slope is positive, this line gradually rises on the graph as the x-value increases.
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Based on the information, the line has a positive slope. Because its y-intercept is 50 and its slope is positive, this line gradually moves downward on the graph as the x-value increases.
The graph shows the temperature change over time of a heated cup of water.
What is the slope of the graph between the time period 2 min and 5 min?
- –15 ºC/min
- –0.07 ºC/min
- 0.07 ºC/min
- 15 ºC/min