experimental error

Sometimes, even if the error is known, it cannot be corrected due to imperfection in the experimental arrangement. e.g., Loss of heat due to radiation in calorimetry. These errors always exist, but observations can be correcte..

This error occurs due to a person's mistake while performing the experiment. It cannot be corrected. It is of three types:- Neglect of the source of error: This is a result of negligence of sources of errors. E.g., plotting field of a magnet, improper setting of m..

Different types of lengths are measured by using different types of instruments. Lengths like the length of cloth or length of a line can be measured by using measuring tape, a metre scale or a foot rule. But these instruments cannot be used to measure the diameter of a metal sphere or a cylinder. ..

. If the zero is not coinciding with the datum line, there will be a positive or negative zero error as shown in figure below. Zero error in case of screw gauge While taking a reading, the thimble is turned until the wire is held firmly between the anvil and the spindle. The lea..

Although the energy difference in the heats of hydrogenation for the 2-butene isomers (1.0 kcal/mol) is in agreement with the energy difference calculated from equilibrium data (0.66 kcal/mol), the two numbers are not exactly the same. This is because the first is simply experimental ..

. It must be noted here that scientific theories and laws are always provisional. Since scientific investigation is a human mental activity, to obviate human errors, it is necessary to confirm or reject the experimental results based on repeated investigations (if necessary by m..

. When it is at rest, on placing the vibrating tuning fork on the sound box, the paper rider is found to vibrate vigorously and may be thrown off. The resonating length AC = L is measured using a metre scale. The experiment is repeated by gradually increasing the load W 2 in steps of 1Kgwt. The rea..

= 0.01 cm The Vernier calliper consists of a main scale fitted with a jaw at one end. Another jaw, containing the vernier scale, moves over the main scale. When the two jaws are in contact, the zero of the main scale and the zero of the vernier scale should coincide. If both the zeros do not coinci..