Lab Write-Up 6

# Lab Write-Up 6 - Chapter 6 Radar Measurement Of Mercury's...

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Chapter 6: Radar Measurement Of Mercury’s Rotation Report by: Nick Orozco Section 5 17 February 2008 Lab Partner: Colin Smolinsky

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Nick Orozco Section 5 17 February 2008 Lab Partner: Colin Smolinsky Chapter 6: Radar Measurement of Mercury’s Rotation The purpose of this lab is to better understand how we go about measuring velocities of objects moving in space. The conventional methods we use on Earth (such as using the equation v = d/t) don’t work on astronomical objects. During this lab we will employ a method commonly used by Police when measuring the speed of cars, the Doppler Effect. By the end of this lab we should better understand how the Doppler Effect is used to measure the velocity of astronomical objects in space. Data t (sec) 120 x 10 -6 210 x 10 -6 300 x 10 -6 390 x 10 -6 d (meters) 1.8 x 10 4 3.15 x 10 4 4.5 x 10 4 5.85 x 10 4 x (meters) 2.4 x 10 6 2.39 x 10 6 2.38 x 10 6 2.36 x 10 6 y (meters) 294611.6 389188.6 464515.9 528883.5 f left -66178.1 -66178.3 -66178.7 -66179.1 f right -66175.8 -66175.5 -66175.2 -66175.5 f total 1.13 1.4 1.77 1.76 fc (Hz) 0.565 0.7 0.885 0.88 V 0 (m/s) 0.394186 0.48837 0.617442 0.613953 V (m/s) 0.323792 0.303673 0.32167 0.280925 P rot (days) 54.3519 57.95293 54.71044 62.64561 ∆t @ reference: -66177.30 Hz (sub-radar point)
6.6.1 Calculating the Percent Error
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