youngs modulus
... Note that this initial load is not to be taken as part of the load M extending the wire. the distance from the supported end of the wire L is measured to the edge of a tape on the wire. the cross wires in the travelling microscope is then focused on the edge of the tape and the initial reading x1 is recorded from the horizontal scale. Note that the travelling microscope has a main scale calibrated in mm to a precision of 0.05mm. the actual numerals etched to the scale are cm values and to avoid confusion these should be converted to mm e.g. 5 on the scale as 50mm the movable scale has 50 divisions so the precision of the instrument is 0.5/50 = 0.01mm. Continue adding loads of 1kg to the wire up to a total 10kg. In each case use the horizontal carriage control on the travelling microscope to realign the cross wire with the same tape edge on the wire. Record the new reading x2 on the horizontal scale. The extension ∆L of the wire for the load applied is given by, ∆L = x2 – x1 Experimental data: Load M/kg Stress Mg/A Reading x2 Extension ∆L Stain ∆L/L 3kg 48887043.19 0.06351 0.00031 3.17 x10^-4 4kg 6511627907 0.06364 0.00044 4.568 x10^-4 5kg 81478405.32 0.06385 0.00063 6.45 x10^-4 6kg 97774086.38 0.06405 0.00085 8.709 x10^-4 7kg 114069767.4 0.06426 0.00106 1.08 x10^-3 8kg 13036544805 0.06442 0.00122 1.25 x10^-3 Calc...