HPS211H1 Lecture 7: Lecture 7 - Exactness & Gene

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rosewalrus493

6 Jun 2012

School

UTSG

Department

History and Philosophy of Science and Technology

Course

HPS211H1

Professor

Chen- Pang Yeang

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Document Summary

Natural philosophers had used numerical values/information in disciplines like astronomy and navigation. Quality of measurement and calculations has longstanding issues especially in astronomy. Concerned with the precision, accuracy and exactness of their calculation. Issues became pressing in the 18th c: spirit of quantification. Lunar table, orbits of saturn and jupiter, figure of earth. Quantitative experiments in chemistry, optics, pneumatics, hydraulics, elasticity these experiments were imposed by scientists in the 18th c. ) Impose the cause of reason into government administration utilize statistical/numerical data. Commerce and trade with more exact numbers. Make multiple measurements, but only present the best data set. There was a perfect figure for a measurement, a golden event for experiment or observation. The perfect figure was attainable by improving instruments or skills. No fundamental reason to prevent the acquisition of the perfect figures. The failure to obtain the perfect figure was thus measurer"s fault symptom of laziness, carelessness, incompetence. Lavoisier represented an example of best measurement approach.

Related Questions

a).An object of mass 541 g is attached to a spring with springconstant k = 653 N/m. If the object is displaced by 130 mm from theequilibrium position and is released, with what speed doe theobject pass through the equilibrium position during itsmotion?

Express the result in the unit [m/s] and to three significantfigures. If you must use scientific notation, please enter asfollows: e.g. 0.000123 = 1.23E-4. Only answer in numerical values,no units. For negative numbers, leave no space between the negativesign and the number: e.g. right: -1.00, wrong: - 1.00.

b).An object has a mass of m = 647 g. It is attached to a springwhich has a spring constant of value k = 65 N/m. At time t = 0 theobject is pulled to a distance of 28.1 cm from its equilibriumposition (which you may choose conveniently at x = 0). The surfaceon which the object moves is frictionless.

What is the total energy of the system?

Express the result in the unit [J] and to three significantfigures. If you must use scientific notation, please enter asfollows: e.g. 0.000123 = 1.23E-4. Only answer in numerical values,no units. For negative numbers, leave no space between the negativesign and the number: e.g. right: -1.00, wrong: - 1.00.

c).The vibration of the tympanic membrane in the human ear(eardrum) can be described as a harmonic motion. Assuming a mass of20.6 mg and a period of vibration of 1.72 ms, what is the naturalvibration frequency of the membrane?

Express the result in the unit [Hz] and to three significantfigures. If you must use scientific notation, please enter asfollows: e.g. 0.000123 = 1.23E-4. Only answer in numerical values,no units. For negative numbers, leave no space between the negativesign and the number: e.g. right: -1.00, wrong: - 1.00.

d).An object of mass m is attached to a spring with spring constantk = 170 N/m. At time t = 0 the object is pulled to a distance of0.18 m from its equilibrium position. The surface on which theobject moves is frictionless and the spring is within its elasticregime. What is the mass of the object if it oscillates with afrequency f = 2.90 Hz when it is released?

Express the result in the unit [kg] and to three significantfigures. If you must use scientific notation, please enter asfollows: e.g. 0.000123 = 1.23E-4. Only answer in numerical values,no units. For negative numbers, leave no space between the negativesign and the number: e.g. right: -1.00, wrong: - 1.00.

I'm starting a Physics course which uses "Physics for Scientistsand Engineers 8th Edition". The most advanced Math I've taken isPrecalculus (functions and trig). I'm taking Cal 1 at the same timeas this Phys and would like to know if I should skip the Phys andwait until I've learned Cal. The Physics book consists of thefollowing:

Part 1: Mechanics
1 Physics & Measurement
2 Motion in One Dimension
3 Vectors
4 Motion in Two Dimensions
5 The Laws of Motion
6 Circular Motion & Other Applications or Newton's Law
7 Energy of a System
8 Conservation of Energy
9 Linear Momentum and Collisions
10 Rotation of a Rigid Object About a Fixed Axis
11 Angular Momentum
12 Static Equilibrium and Elasticity
13 Universal Gravitation
14 Fluid Mechanics

Part 2: Oscillations and Mechanical Waves

15 Oscillatory Motion
16 Wave Motion
17 Sound Waves
18 Superposition and Standing Waves

Part 3: Thermodynamics

19 Temperature
20 The First Law of Thermodynamics
21 The Kinetic Theory of Gases
22 Heat Engines, Entropy, and the Second Law ofThermodynamics

Sorry about the length but it's an important decision for me. Thankyou.

Danny

HPS211H1 Lecture 7: Lecture 7 - Exactness & Gene

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