Chapter 1: Q4CQ (page 32)
What determines the validity of a theory?
Short Answer
The theory is a well-explained aspect of law, concept, fact, and hypothesis. It is also the verbal explanation of a formula or concept.
Chapter 1: Q4CQ (page 32)
What determines the validity of a theory?
The theory is a well-explained aspect of law, concept, fact, and hypothesis. It is also the verbal explanation of a formula or concept.
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Get started for free(a) How many significant figures are in the numbers 99and 100? (b) If the uncertainty in each number is 1, what is the percent uncertainty in each? (c) Which is a more meaningful way to express the accuracy of these two numbers, significant figures or percent uncertainties?
Question: How many times longer than the mean life of an extremely unstable atomic nucleus is the lifetime of a human? (Hint: The lifetime of an unstable atomic nucleus is on the order of\({\bf{1}}{{\bf{0}}^{ - {\bf{22}}}}{\rm{ }}{\bf{s}}\).
A car engine moves a piston with a circular cross-section of\({\bf{7}}.{\bf{500}}{\rm{ }} \pm {\rm{ }}{\bf{0}}.{\bf{002}}{\rm{ }}{\bf{cm}}\)diameter a distance of\({\bf{3}}.{\bf{250}}{\rm{ }} \pm {\rm{ }}{\bf{0}}.{\bf{001}}{\rm{ }}{\bf{cm}}\)to compress the gas in the cylinder. (a) By what amount is the gas decreased in volume in cubic centimeters. (b) Find the uncertainty in this volume.
Prescriptions for vision correction are given in units called dioptres (D). Determine the meaning of that unit. Obtain information (perhaps by calling an optometrist or performing an internet search) on the minimum uncertainty with which corrections in dioptres are determined and the accuracy with which corrective lenses can be produced. Discuss the sources of uncertainties in both the prescription and accuracy in the manufacture of lenses.
The time delay between transmission and the arrival of the reflected
wave of a signal using ultrasound traveling through a piece of fat tissue was 0.13ms. At what depth did this reflection occur?
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