College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Chapter 1, Problem 1CQ
Models are particularly useful in relativity and
Expert Solution & Answer
To determine
What is a model?
Answer to Problem 1CQ
A physical model consists of a construction, representation or approximation of the behavior of a physical phenomenon by means of mathematical tools, computational simulations or hypotheses verifiable by scientific experiments.
Explanation of Solution
Introduction:
Most of the natural phenomena are complex. So developing a theory that explains accurately and has the ability to predict new unknown phenomena is not a simple task.
The physical models are necessary when the phenomenon to be studied escapes from the scale of human perception or from an adequate instrumentation to reproduce the phenomenon in its entirety. So what is sought is to understand the phenomenon by means of hypotheses and, or mathematical-computational constructions of the behavior of nature in a partial way, that is, by dividing the problem into smaller problems that are achievable or reproducible through scientific experimentation.
For example, to explain the nature of light, Newton proposed the Corpuscular Model, but it cannot explain all the phenomena related to the interference of light. Years later, Huygens proposed a model from the wave point of view that successfully explained the interference of light.
Conclusion:
A physical model consists of a construction, representation or approximation of the behavior of a physical phenomenon by means of mathematical tools, computational simulations or hypotheses verifiable by scientific experiments.
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Scientists are conducting an experiment to determine if their hypothesis that a certain constant in the universe is 1.65. the uncertainties in the experiment result in a relative uncertainty of no more than 2%. After several experimental trials, the scientists obtained an average value of 1.7 for the constant. What can be said about the scientists hypothesis? Hint calculate the percent error and compare it to the relative uncertainty.
Models are particularly useful in relativity and quantum mechanics, where conditions are outside those normally encounteredby humans. What is a model?
Take Test: Exp: 3 Free Fall Lab report 1st 2021-2022
QUESTION 3
The following data are taken by a student for a free fall experiment,
Уm)
0.300
12(sec)
0.284
t1(sec)
0.264
0.350
0.286
0.306
0.400
0.306
0.326
0.450
0.325
0.345
0.500
0.344
0.364
0.550
0.361
0.381
0.600
0.377
0.397
Use the above table and the following equation to plot (y vs t2 ) graph.
1
y=gt2
The slope of the graph is
and its unit is
The slope represents
The value of g is
O and its unit is
Save Answer
Chapter 1 Solutions
College Physics
Ch. 1 - Models are particularly useful in relativity and...Ch. 1 - How does a model differ from a theory?Ch. 1 - If two different theories describe experimental...Ch. 1 - What determines the validity of a theory?Ch. 1 - Certain criteria must be satisfied if a...Ch. 1 - Can the validity of a model be limited, or must it...Ch. 1 - Classical physics is a good approximation to...Ch. 1 - When is it necessary to use relativistic quantum...Ch. 1 - Can classical physics be used to accurately...Ch. 1 - Identify some advantages of metric units.
Ch. 1 - What is the relationship between the accuracy and...Ch. 1 - Prescriptions for vision correction are given in...Ch. 1 - The speed limit on some interstate highways is...Ch. 1 - A car is traveling at a speed of 33 m/s. (a) What...Ch. 1 - Show that 1.0m/s=3.6Km/h. Hint: Show the explicit...Ch. 1 - American football is played on a 100-yd-long...Ch. 1 - Soccer fields vary in size. A large soccer field...Ch. 1 - What is the height in meters of a person who is 6...Ch. 1 - Mount Everest, at 29,028 feet, is the tallest...Ch. 1 - The speed of sound is measured to be 342 m/s on a...Ch. 1 - Tectonic plates are large segments of the Earth's...Ch. 1 - (a) Refer to Table 1.3 to determine the average...Ch. 1 - Suppose that your bathroom scale reads your mass...Ch. 1 - A good-quality measuring tape can be off by 0.50...Ch. 1 - (a) A car speedometer has a 5.0% uncertainty. What...Ch. 1 - An infant's pulse rate is measured to be 1305...Ch. 1 - (a) Suppose that a person has an average heart...Ch. 1 - A can contains 375 mL of soda. How much is left...Ch. 1 - State how many significant figures are proper in...Ch. 1 - (a) How many significant figures are in the...Ch. 1 - (a) If your speedometer has an uncertainty of 2.0...Ch. 1 - (a) A person's blood pressure is measured to be...Ch. 1 - A person measures his or her heart rate by...Ch. 1 - What is the area of a circle 3.102 cm in diameter?Ch. 1 - If a marathon runner averages 9.5 mi/h, how long...Ch. 1 - A marathon runner completes a 42.188-km course in...Ch. 1 - The sides of a small rectangular box are measured...Ch. 1 - When non-metric units were used in the United...Ch. 1 - The length and width of a rectangular room are...Ch. 1 - A car engine moves a piston with a circular cross...Ch. 1 - How many heartbeats are there in a lifetime?Ch. 1 - A generation is about one-third of a lifetime....Ch. 1 - How many times longer than the mean life of an...Ch. 1 - Calculate the approximate number of atoms in a...Ch. 1 - Approximately how many atoms thick is a cell...Ch. 1 - (a) What fraction of Earth's diameter is the...Ch. 1 - (a) Calculate the number of cells in a hummingbird...Ch. 1 - Assuming one nerve impulse must end before another...
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