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Chapter 1: Problem 27
A radian is how many degrees?
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When does an estimation comply well with the actual measurement?
The semiconductor chip at the heart of a personal computer is a square \(4 \mathrm{~mm}\) on a side and contains \(10^{10}\) electronic components. (a) What's the size of each component, assuming they're square? (b) If a calculation requires that electrical impulses traverse \(10^{4}\) components on the chip, each a million times, how many such calculations can the computer perform each second? (Hint: The maximum speed of an electrical impulse is about two-thirds the speed of light.)
In 2017 , solar panels on your author's home generated 3849 kilowatt-hours (kWh) of electrical energy, while the house consumed electrical energy at an average rate of 392 watts (W). Find the average rate of solar power generation in watts, where \(1 \mathrm{kWh}\) is \(3.6\) megajoules (MJ; the joule is the SI unit of energy) and \(1 \mathrm{~W}\) is \(1 \mathrm{~J} / \mathrm{s}\). Did the house generate more or less electrical energy than it consumed?
What facts might a scientist use in estimating Earth's age?
If you're working from the print version of this book, estimate the thickness of each sheet of paper. Or, estimate based on another print book.
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