Physics: Principles with Applications
7th Edition
ISBN: 9780321625922
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 1, Problem 1Q
What are the merits and drawbacks of using a person's foot as a standard? Consider both(a) a particular person's foot, and (b) any person's foot keep in mind that it is advantageous that fundamental standards be accessible (easy to compare to), invariable (do not change), indestructible, and reproducible.
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Still think that unit conversion isn't important?
Here is a widely publicized, true story about how failing to convert units resulted in a huge loss. In 1998, the Mars Climate Orbiter probe crashed into the surface of Mars, instead of entering orbit. The resulting inquiry revealed that NASA navigators had
been making minor course corrections in Sl units, whereas the software written by the probe's makers implicitly used British units. In the United States, most scientists use Sl units, whereas most engineers use the British, or Imperial, system of units.
(Interestingly, British units are not used in Britain.) For these two groups to be able to communicate to one another, unit conversions are necessary.
The unit of force in the SI system is the newton (N), which is defined in terms of basic Sl units as 1N=1 kg -m/s?. The unit of force in the British system is the pound (lb), which is defined in terms of the slug (British unit of mass), foot (ft), and second
(s) as 1 lb = 1 slug · ft/s?.…
Still think that unit conversion isn't important?
Here is a widely publicized, true story about how failing to convert units resulted in a huge loss. In 1998, the Mars Climate Orbiter probe crashed into the surface of Mars,
instead of entering orbit. The resulting inguiry revealed that NASA navigators had been making minor course corrections in SI units, whereas the software written by the
probe's makers implicitly used British units. In the United States, most scientists use Sl units, whereas most engineers use the British, or Imperial, system of units.
(Interestingly, British units are not used in Britain.) For these two groups to be able to communicate to one another, unit conversions are necessary.
The unit of force in the SI system is the newton (N), which is defined in terms of basic Sl units as 1 N=1 kg · m/s?. The unit of force in the British system is the pound
(lb), which is defined in terms of the slug (British unit of mass), foot (ft), and second (s) as 1 lb =1 slug ·…
So we take a pile of paper, we count the number of sheets, and obtain 226. Then, we measure how tall the pile is with a ruler: 24.0 mm.
As discussed in section 1, we could have a long argument about how much exactly should the uncertainty of this measurement be. Let’s settle to ± 0.5 mm
Chapter 1 Solutions
Physics: Principles with Applications
Ch. 1 - Prob. 1OQCh. 1 - Prob. 2OQCh. 1 - What are the merits and drawbacks of using a...Ch. 1 - What is wrong with this road sign: Memphis 7 mi(11...Ch. 1 - Why is it incorrect to think that the more digits...Ch. 1 - For an answer to be complete, the units need to be...Ch. 1 - 5. You measure the radius of a wheel to be 4.16...Ch. 1 - Express the sine of 30.0° with the correct number...Ch. 1 - List assumptions useful to estimate the numbers of...Ch. 1 - A student’s weight displayed on a digital scale is...
Ch. 1 - Four students use different to measure the Length...Ch. 1 - Prob. 3MCQCh. 1 - How many significant figures does 1.862 + 25.2...Ch. 1 - Prob. 5MCQCh. 1 - To convert from ft2 to yd2, you should multiply by...Ch. 1 - Prob. 7MCQCh. 1 - (L2) represents the dimensions for which of the...Ch. 1 - How many significant figures do each of the...Ch. 1 - Write the following numbers in powers of 10...Ch. 1 - Write out the following numbers in full with the...Ch. 1 - The age of the universe is thought to be about 14...Ch. 1 - What is the percent uncertainly in the measurement...Ch. 1 - 6.(II) Time intervals measured with a stopwatch...Ch. 1 - Prob. 7PCh. 1 - Multiply 3.079102 m by 0.068 10-1m, taking into...Ch. 1 - What, approximately, is the percent uncertainty...Ch. 1 - What, roughly, is the percent uncertainty in the...Ch. 1 - Prob. 11PCh. 1 - Write the following as full (decimal) numbers...Ch. 1 - Express the following using the prefixes of Table...Ch. 1 - Prob. 14PCh. 1 - Prob. 15PCh. 1 - Prob. 16PCh. 1 - Prob. 17PCh. 1 - Prob. 18PCh. 1 - A light-year is the distance light travels in one...Ch. 1 - How much longer (percentage) is a one-mile race...Ch. 1 - Prob. 21PCh. 1 - (a) How many seconds are there in 1.00 year? (b)...Ch. 1 - Use Table 1-3 to estimate the total number of...Ch. 1 - A standard baseball has a circumference of...Ch. 1 - Prob. 25PCh. 1 - Estimate how many books can be shelved in a...Ch. 1 - Estimate how many hours it would take to run (at...Ch. 1 - Estimate the number of liters of water a human...Ch. 1 - Prob. 29PCh. 1 - Estimate the number of gallons of gasoline...Ch. 1 - Prob. 31PCh. 1 - Prob. 32PCh. 1 - Prob. 33PCh. 1 - Prob. 34PCh. 1 - Prob. 35PCh. 1 - What are the dimensions of density, which is mass...Ch. 1 - (II) The speed v of an object is given by the...Ch. 1 - Prob. 38PCh. 1 - Prob. 39PCh. 1 - Prob. 40GPCh. 1 - Prob. 41GPCh. 1 - Prob. 42GPCh. 1 - Prob. 43GPCh. 1 - Prob. 44GPCh. 1 - Prob. 45GPCh. 1 - Prob. 46GPCh. 1 - A Certain compact disc (CD) contains 783.216...Ch. 1 - Prob. 48GPCh. 1 - A storm dumps 1.0 cm of rain on a city 6 km wide...Ch. 1 - Prob. 50GPCh. 1 - Prob. 51GPCh. 1 - Prob. 52GPCh. 1 - Prob. 53GPCh. 1 - Prob. 54GPCh. 1 - Prob. 55GPCh. 1 - Prob. 56GPCh. 1 - Prob. 57GPCh. 1 - Prob. 58GPCh. 1 - Prob. 59GPCh. 1 - Prob. 60GPCh. 1 - Prob. 61GP
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