Length Drill

Length Drill

 

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Physics question: Are you ... Hard at the end of a thin rod of length 1.3 m Drill holes?

You, of 1.3 m at the end of a thin solid bar About the length of the drill hole and then attached to the hole in the pivot friction Through the bars. Then, a simple harmonic motion release Reasonably small break in the vertical angle of the pistol, running So it. a.) What is going to be times that vibration? to the bottom of the bar) ________________seconds b. During vibration of the ground approximately 2 cm in height, which varies Was the angle from the initial vertical? ___________degrees (Note: You stick I have well-defined width can ignore this Allow.) 2 also

) This is just a simple pendulum. Vibration Period (T = 2pi Sqrt the L / (2g)) = 2 * pi () ※ Sqrt (1.3 / (2 * 9.8)) = 1.6 seconds. Here Half the length of the bar to use its position as the center of mass of) Is uniform is located (assuming the stick. B) is a part of trigonometry. You expect that when the distance between the vertical bar vibration Is 2cm. This is 1.3 - 1.3 * product, because (angle) = 0.02 (acos = Solving the above equation, we can get an angle on the angle (1.3-0.02) / 1.3) = 10. Degree

 

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Metalline Reports Drill Results from the Shallow Silver-Zinc Zone Sierra Mojada Project, Coahuila, Mexico
Metalline Mining Company is pleased to announce drilling results from commercial assaying of drill samples from 2009 and the initial commercial assay results from 2010 at the shallow silver-zinc resource area from the Sierra Mojada Project located in Coahuila, Mexico. Â Results reported below are at a 30 gpt Ag or 1% Zn external cut-off. Â Individual assay intervals ranged from 0.1 meter to 1 ...