The length of a steel tape found to be exactly 30 m at a temperature of 30° C under pull of 5 kg when lying on the flat platform. The tape is stretched over two supports between which the measured distance is 300.000 m. There are two additional supports in between equally spaced. All the supports are at same level; the tape is allowed to sag freely between the supports. Determine the actual horizontal distance between the outer supports, and its equivalent reduced mean sea level distance if the mean temperature during the measurements was 37 C and the pul applied was 9kg. The average elevation of the terrain is 1500 m. Take tape details as below: Weight = 1.50 kg Area of cross-section = 6.5 mm Coefficient of linear expansion = 1.2x 10/C Modulus of elasticity of tape material E = 2.1x 10 kg/cm Mean earth, radius= 6372 km.
The length of a steel tape found to be exactly 30 m at a temperature of 30° C under pull of 5 kg when lying on the flat platform. The tape is stretched over two supports between which the measured distance is 300.000 m. There are two additional supports in between equally spaced. All the supports are at same level; the tape is allowed to sag freely between the supports. Determine the actual horizontal distance between the outer supports, and its equivalent reduced mean sea level distance if the mean temperature during the measurements was 37 C and the pul applied was 9kg. The average elevation of the terrain is 1500 m.
Take tape details as below:
Weight = 1.50 kg
Area of cross-section = 6.5 mm
Coefficient of linear expansion = 1.2x 10/C
Modulus of elasticity of tape material E = 2.1x 10 kg/cm
Mean earth, radius= 6372 km.
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