Lap report Lab Example | Topics and Well Written Essays - 250 words - 1

Lap - Lab Report Example Explanation of Procedure: A meter stick was mounted at slightly greater than eye level, level to the ground. A plumb bob, actually a string with a nut tied to the end, hung at head level exactly 0.5 meters from the meter stick. This served as an observation post with easily converted and consistent measures. As the moon fully rose past the horizon, two index cards were â€Å"butted† to either edge of the moon and the indicated length was recorded. This procedure was repeated later. Data and Calculations: The chart results: time d (cm) D (cm) conversion ? 7:10 50 0.5 205265 2053 10:10 50 0.5 205265 2053 Where: d=50 cm as set by the experiment. D= the measure between the cards ?=the angle size of the moon in arc seconds calculated as =(D/d) x 205265 The diameter of the moon is calculated as: D= (205265 x 2053)/ 380000km d=3800 km The angular size of the moon by calculation is: 2053 arc seconds The estimated diameter of the moon is: 3800 km The angular size of the moon is consist ent throughout a one night period; however, the distance to the moon varies over time, so over years, the angular size changes Conclusions and Analysis: The method used produces a good approximation of the diameter of the moon.