what are experimental methods

Module Two: Sampling and Experimentation - Overview of methods of data collection: Census Sample survey Experiment Observational study Planning and conducting surveys: Characteristics of a well-designed and well-conducted survey Populations, samples, and random selection Sources..

The rate of a reaction is determined by measuring the concentration of the reactant or product at different intervals of time. The concentration is measured, by measuring a related property such as color, pressure or volume (as in the case of gas phase reactions), pH, optical rotation, electrical c..

Methods of completing a square and to derive the formula for the solution of the quadratic equation. ..

Step 4: The second integral can be evaluated by method completing square..

Step 3: Resulting integral is evaluated by method of completing squares..

A circular heater is fit around one end of a rod of impure germanium The heater heats a zone or band of the impure rod, it is in contact with The heated zone of germanium melts along with its impurities When the heater gradually shifts to the next zone pure germanium cools and crystalliz..

A small known mass (0.2 to 0.3 g) of the given organic compound is heated with fuming nitric acid and a few crystals of silver nitrate at about 200C in a sealed tube (called Carius tube) for 5 to 6 hours. Carbon and hydrogen are oxidized to carbon dioxide and water while halogen forms a precipitat..

Step 2: Determine L and M Step 4: Integral = Lx + M log (a cos x + bsi..

Put e x f(x) = t Differentiating w.r.t. x, {e x f(x) +e x f ' (x)} dx = dt e x {f(x) + f ' (x)} dx = dt = t + c = e x f(x)+c Evaluate the integral..

P(n,r) is the number of permutations of n dissimilar things taken r at a time. These permutations can be divided into two groups. (i) Those not containing a particular thing l . (ii) Those containing a particular thing l . Taking out l from the given things, we have (n-1) things which can be..