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When one end of a capillary tube is put into a liquid that wets glass, the liquid rises into the capillary tube to a certain height and then stops. The rise of liquid in a capillary is due to the inward pull of surface tension acting on the surface, which pushes the liquid into the capil..

Rinse your mouth 2 to 3 times to remove any food particles and collect saliva in three test tubes labelled A, B and C. To A and B each add half the quantity of 2% starch solution. To C add boiled saliva. Leave them for 5 minutes. At the end of five minut..

Synthetic detergents have the same type of molecular structure as soaps i.e. a tadpole like molecule having two parts at each end i.e., one large non-polar hydrocarbon group that is water repelling (hydrophobic) and one short ionic group usually containing the or group that is water a..

The cleaning action of soap occurs when oil and grease are absorbed into the hydrophobic centers of soap micelles and are washed away. fig 7.10 - Cleansing action of soap Sodium lauryl sulphate is a synthetic detergent present in laundry soaps, toothpastes and shampoos. The form..

. In the first experiment, when two spring balances are pulled in opposite directions, they experience the same force acting in the opposite directions. In case of the balloon when you release it, the air inside the balloon rushes out downward, exerting force on the air outside. The balloon experie..

The muscles in the body provide the means of all movements. When stimulated by a nerve, the muscle contracts to become shorter and thicker and thus it pulls the bone at the movable end. Most actions in our body like standing, walking, running, playing etc. require combined ..

I shall have finished my studies by that time. Before you reach there, the train will have left. The Future Perfect Continuous tense indicates an action as being in progress over a period of time that will end in the future..

The axons of the motor nerve fibre end on a muscle fibre or a gland. The synapse formed at the junction of the motor nerve fibre and the muscle fibre is called the neuromuscular junction. At the neuromuscular junction also, the axon forms branches that are devoid of myelin sheath. At the ..

It consists of the rods and cones. The rods and cones are the photoreceptor cells that contain the pigments that trap the incident light rays and convert their energy into action potentials. These action potentials are then transmitted as nervous impulses. The pigments are ..

The impulse is received by the dendrites and passed through the cell body to the axon. An impulse is an electrical disturbance. All along the nerve fibre, the cytoplasm is more electronegative than the outside and is thus having a potential. This is due to the differential distribution of sodium a..