by taking numerical measurments of an experiment the scentists is eliminating from the experiment

>Geotropism in Roots If a plant is rotated on a special apparatus called clinostat, it neutralizes the effect of gravity and the shoot continues to grow horizontally without any curvatur..

Take about 2 - 4 g of cane sugar, and add about 5 ml of concentrated sulphuric acid. You will notice that the white crystals of sugar gradually change to yellowish brown and then to brown, and finally to black color. Add some water to wash out the unused sugar or excess of sulphuric acid..

When CO is passed over heated metallic oxides, it takes away the oxygen to form carbon dioxide and reduces the oxides to their respective metals (Fig.11.5)...

Take a large block of charcoal. Make a cavity with a pointed knife, and place lead monoxide powder in the cavity. With the help of a blowpipe, blow a bunsen flame into the cavity. Charcoal reduces lead monoxide to a molten bead of lead. By plunging the charcoal block carefully in cold wa..

Take distilled water in a trough. Boiled and cooled water can also be taken since it does not contain dissolved air. Invert a gas jar filled with oxygen, over it, as shown in the figure (Fig.13.9). After some time, the level of the water rises inside the gas jar indicating that the water..

Take a round strip of filter paper. Fold it into half, and then into quarter. Then open it in the form of a cone and place in a funnel and fix it to the funnel with the help of a few drops of water. Take a small quantity of the mixture of water and powdered chalk. Transfer it with the hel..

Procedure Observation Inference Take a table tennis ball and make 3 slits into it The force of the steam rotates the blades, and it acts like a simple turbine. Mechanical energy is converted into electrical energy. Fix semicircular fins of a metal sheet into thes..

. 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 ste..

The ratio of the intensities at minima to maxima in the interference pattern is 9:25. What will the ratio of the widths of the two slits be in Young's double slit experiment..