the experimental method

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..

Experimental Determination of Rate of Reaction - 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 ..

Pour water into a clean measuring cylinder (nearly three fourth of its volume) and note the level of water. To avoid parallax error, reading must be taken at the lowest level of meniscus or curved surface of the liquid as shown in the diagram below. Attach a string to the solid and lower it into t..

30 people were randomly assigned to one of six experimental conditions. At the end of the lecture, a measure of comprehension was obtained. The data is shown here. At α = 0.05, find the test value F A × B and check the interaction of the variables using a two-way ANOVA. [ A : ..

Volume of an irregular solid can also be found by displacement method using an overflow vessel. Volume by using overflow vessel Fill the overflow vessel with water until the water starts overflowing. When water stops overflowing place a measuring cylinder below the overflow tube. Now..

Measurement of Length - 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 meta..

Gene therapy is a relatively new method of therapeutic interventions, targeted at the level of cellular gene expansion. In this, altering the diseased state is achieved by delivering nucleic acids into a cell. In gene therapy a normal functional gene is introduced into cells that contain ..

Scientific Methodology - Science is basically a collection of knowledge and information that is obtained by observation and testing of natural world, in a logical and orderly manner, and its interpretation. Hence, the basis of science is its orderly, step-wise procedure called scientific metho..

Biology - The study of Life - Biology is a branch of science, which deals with the study of life. It is concerned with the study of living organisms, which are immeasurably diverse and complex than the non-living matter. Hence, biology is also described as life science or natural science. Biology :..

This method employs a mixture of water and pine oil which is made to froth in a tank to separate sulphide ores. The differences in the wetting properties of the ore and gangue particles separate them. A mixture of water, pine oil, detergent and powdered ore is first taken in a tank. ..