21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 2, Problem 39QP
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Find the circumference of Earth based on the Egyptian stadion and how close is that value to the modern value.
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Chapter 2 Solutions
21st Century Astronomy
Ch. 2.1 - Prob. 2.1ACYUCh. 2.1 - Prob. 2.1BCYUCh. 2.2 - Prob. 2.2CYUCh. 2.3 - Prob. 2.3CYUCh. 2.4 - Prob. 2.4CYUCh. 2.5 - Prob. 2.5CYUCh. 2 - Prob. 1QPCh. 2 - Prob. 2QPCh. 2 - Prob. 3QPCh. 2 - Prob. 4QP
Ch. 2 - Prob. 5QPCh. 2 - Prob. 6QPCh. 2 - Prob. 7QPCh. 2 - Prob. 8QPCh. 2 - Prob. 9QPCh. 2 - Prob. 10QPCh. 2 - Prob. 11QPCh. 2 - Prob. 12QPCh. 2 - Prob. 13QPCh. 2 - Prob. 14QPCh. 2 - Prob. 15QPCh. 2 - Prob. 16QPCh. 2 - Prob. 17QPCh. 2 - Prob. 18QPCh. 2 - Prob. 19QPCh. 2 - Prob. 20QPCh. 2 - Prob. 21QPCh. 2 - Prob. 22QPCh. 2 - Prob. 23QPCh. 2 - Prob. 24QPCh. 2 - Prob. 25QPCh. 2 - Prob. 26QPCh. 2 - Prob. 27QPCh. 2 - Prob. 28QPCh. 2 - Prob. 29QPCh. 2 - Prob. 30QPCh. 2 - Prob. 31QPCh. 2 - Prob. 33QPCh. 2 - Prob. 34QPCh. 2 - Prob. 35QPCh. 2 - Prob. 36QPCh. 2 - Prob. 37QPCh. 2 - Prob. 38QPCh. 2 - Prob. 39QPCh. 2 - Prob. 40QPCh. 2 - Prob. 41QPCh. 2 - Prob. 42QPCh. 2 - Prob. 43QPCh. 2 - Prob. 44QPCh. 2 - Prob. 45QP
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- In the US, lengths are often measured in inches, feet, yards and miles. Let's do some conversions. The definition of the inch is: 1 inch = 25.4 mm, exactly. A foot is 12 inches and a mile is 5280 ft, exactly. A centimetre is exactly 0.01 m or 10 mm. Sammy is 5 feet and 5.3 inches tall. Mark all the true statements below (Hint: use the 'multiply by 1' technique. Use the appropriate number of sig figs.)arrow_forward1.8. Having access to the vast informational resources of the Library of Alexandria, Eratosthenes knew that the distance between Syene and Alexandria is 5000 stadia. One stadion (plural stadia) was a unit of length commonly used at the time; it was approximately equal to 160 meters. Express the distance between Syene and Alexandria in meters: s = 1.9. Travelling from Syene to Alexandria, one travels along the arc of a circle. Recall that for a circle of radius R, the length s of an arc and the angle 0 subtended by that arc are related by the following equation: [8] In using this equation, the angle must be measured in radians. Use equation [8] to S = RO calculate the radius of Earth: R =arrow_forwardBy what exponent of 10 would a numerical quantity change if measured in micrometers rather than kilometers? (Write your answer in place of the "x" from 10^(x) where x is the answer you believe converts the units properly)arrow_forward
- Put the following number in scientific notation, using the number of significant figures listed in (parenthesis) 235,000 (4) 2.350 x 10 .235 x 10 2.35000 x 10 2.35 x 10 2.350 x 10 2.35 x 10arrow_forwardThe Sun, on average, is 93 million miles from Earth. How many meters is this? Express (a) using powers of 10, and (b) using a metric prefix (km).arrow_forwardWhen you use a micrometer to measure the diameter of a rod, you obtained a reading 5.17 mm. If you know the zero offset of the micrometer is -1 micrometer, what is the actual diameter (in unit of mm) of the rod?arrow_forward
- A cylinder has diameter = 3.8 cm, length = 5 cm, and density= 5 g/cm3. Calculate its mass in kg. (Write your answer to three places of decimal)arrow_forwardA small turtle moves at a speed of 163 furlongs per fortnight. Find the speed of the turtle in centimeters per second. Note that 1 furlong = 220 yards and 1 fornight = 14 days. Observe correct number of significant figures in your final answer.arrow_forward(0.59 x 10^-6 x 0.3) / (0.36 x 10^-3) when you calculate that don't you get 4.9166 x 10 ^-4 m not 4.92 x 10^-2 m?arrow_forward
- A light-year is the distance light travels in one year (at speed 2.998 x 10^8 m/s). (a) How many meters are there in 1.00 light-year? (b) An astronomical unit (AU) is the average distance from the Sun to Earth, 1.50 X 10^8 km. How many AU are there in 1.00 light-year?arrow_forwardThe cubit is an ancient unit of length based on the distance between the elbow and the tip of the middle finger of the measurer. Assume that the distance ranged from 43 to 53 cm, and suppose that ancient drawings indicate that a cylindrical pillar was to have a length of 9 cubits and a diameter of 2 cubits. For the stated range, what are the lower value and the upper value, respectively, for (a) the cylinder’s length in meters, (b) the cylinder’s length in millimeters, and (c) the cylinder’s volume in cubic meters?arrow_forwardThere are 2600 miles between Boston and Los Angeles (in a straight line). If a plane flies at 600miles/hour. How long is the flight between Boston and LA? (ROUND OFF ANSWER TO TWO DECIMAL PLACES)arrow_forward
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