Download Back-of-the-Envelope Physics by Clifford Swartz PDF

By Clifford Swartz

ISBN-10: 0801872634

ISBN-13: 9780801872631

Physicists use "back-of-the-envelope" estimates to ascertain even if an concept might be correct. in lots of circumstances, the approximate resolution is all that's wanted. This compilation of one zero one examples of back-of-the-envelope calculations celebrates a quantitative method of fixing physics difficulties. Drawing on a life of physics learn and approximately 3 many years because the editor of The Physics instructor, Clifford Swartz offers basic, approximate strategies to physics difficulties that span a wide variety of themes. What word do you get in case you blow around the most sensible of a Coke bottle? may you drop a few pounds on a nutrition of ice cubes? How can a fakir lie on a mattress of nails with no getting damage? Does draining water within the northern hemisphere fairly swirl in a special path than its counterpart under the equator? In every one case, just a couple of strains of mathematics and some typical constants resolve an issue to inside a number of percentage. overlaying such topics as astronomy, magnetism, optics, sound, warmth, mechanics, waves, and electrical energy, the publication offers a wealthy resource of fabric for lecturers and an individual attracted to the physics of daily life.

Show description

Read Online or Download Back-of-the-Envelope Physics PDF

Best astronomy & astrophysics books

Astronomical Photometry, Text and Handbook for the Advanced Amateur and Professional Astronomer

This used to be a good booklet - again in 1990. it truly is now badly outdated. It tells you all approximately photometers of twenty years in the past that used photo-electric tubes or pulse counters, yet says not anything approximately what humans use this day for photometry (CCD cameras). The expertise defined during this ebook is historical contemplating the main developments which were made for the reason that 1990.

Observing the Moon: The Modern Astronomer's Guide

What do scientists learn about the Moon? What are a few of the mysteries that stay to be solved? Written through an skilled and recognized lunar professional, this can be a ''hands-on'' primer for the aspiring observer of the Moon. even if you're a beginner or already skilled in sensible astronomy, you will discover lots during this ebook to aid ''raise your game'' to the following point and past.

Modern celestial mechanics

Within the final two decades, researchers within the box of celestial mechanics have accomplished extraordinary leads to their attempt to appreciate the constitution and evolution of our sunlight approach. glossy Celestial Mechanics makes use of an exceptional theoretical foundation to explain contemporary effects on sun process dynamics, and it emphasizes the dynamics of planets and of small our bodies.

Life Beyond Earth: The Search for Habitable Worlds in the Universe

What's existence and the place can it exist? What searches are being made to spot stipulations for all times on different worlds? If extraterrestrial inhabited worlds are came across, how do we discover them? during this booklet, best astrophysicists offer an enticing account of the place we stand in our quest for liveable environments, within the sunlight method and past.

Additional resources for Back-of-the-Envelope Physics

Example text

5)/360, or about 1,309,000 kilometers. FIGURE 1-23 How to An determine linear size from angular size. easy way to get at this same answer recognize that because the Sun and the same angular size, their true sizes direct proportion to their distances. We can now solve for L and find that 360 Thus, given a body's angular diameter and distance, we can calculate its true diameter. For example, suppose we apply this method to measure the Moon's is to have must be in The Sun is about (150,000,000/384,000) = 391 times further away.

As the Earth moves around the Sun, the Sun's glare blocks our view of the part of the celestial sphere that toward the Sun, making the stars that lie beyond the Sun invisible, For example, in early June, a line from the Earth to the Sun points toward the constellation Taurus, and so its stars are lost in the Sun's glare. After sunset, however, we can see the neighboring constellation, Gemini, just above the western horizon. By early August, the Earth has moved to a new position in its orbit. At that time of year, the Sun lies in the direction of Cancer, causing this constellation to disappear in the Sun's glare.

Month by month, the Sun covers one constellation after another. It is like sitting around a campfire and not being able to see the faces of the people on the far side, but if we get up and walk around the fire, we can see faces that were previously hidden. Similarly the Earth's motion lies as Figure 1-5 shows. hidden in the Sun's glare and makes a and 56 seconds earlier each night. Adding up that delay over a full year gives 24 hours. Thus a year later, when the Earth returns to the same spot in its orbit, the sky looks the same again.

Download PDF sample

Back-of-the-Envelope Physics by Clifford Swartz

by David

Rated 4.34 of 5 – based on 26 votes