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Pressure is a scalar quantity, because its direction is unique (normal to the area) and not to be specified. Barometer uses mercury. This is because, if water were used, then a longer glass tube would have to be used (10m, since10m of water column is required to balance the atmospheric pressur..

Surface tension of oil is lesser than that of water. Therefore, oil spreads on water. Cleansing action of detergents is based on the fact that when soap is added to water, the force of adhesion between soap water and the fabric increases and this reduces the surface tension of water. This resu..

Verbs behave peculiarly with pronouns. We say I am but he is, We say you are even if 'you' refers to a single person. Would you like to see a table to explain number with person? Read the passage and observe the use of the verbs: A hunter was going through the woods. He was ..

Hannah, a personal trainer would like to know the relationship between the number of visits her clients made to the gym and the time spent. She made a scatter plot as shown. Find the average time her clients spent at the gym in 10 visits. => 2.5 hours or 5 hours or 4.5 hours or ..

Did You Know - Stephen Hales - Father of plant physiology Lipmann - Father of ATP cycle Winogradsky - Father of nitrogen fixation Destruction of chlorophyll due to high light intensity is called solarisation. DCMU (Dichlorophenyl dimethyl urea) - a herbicide - inhibits oxygen release in l..

Stephen Hales - Father of plant physiology Lipmann - Father of ATP cycle Winogradsky - Father of nitrogen fixation Destruction of chlorophyll due to high light intensity is called solarisation. DCMU (Dichlorophenyl dimethyl urea) - a herbicide - inhibits oxygen release in light phase ..

A medical researcher wants to know the relationship among a person's age ( x 1 ), hours of exercise ( x 2 ) and the systolic blood pressure (in mmHg) ( y ). He has collected the data of a sample of 8 persons for the research. Find (i) R 2 and (ii) the adjusted R 2 . =>..

Some Important Facts to know - Scientists connected with improvement of crop varieties are called Plant Breeders. Triticale has been developed through hybridization between Wheat and Rye. A Gene Bank is an institution where valuable plant material likely to be lost in cultivation is prese..

Scientists connected with improvement of crop varieties are called Plant Breeder..

A sales manager wishes to know whether there is a relation between the number of sales persons and sales per day. Find correlation coefficient and test the significance of the correlation coefficient of the following data at ∝ = 0.01. No .of sales persons 2 7 1 3 ..