internal and external validity

Question: Find the coordinates of the points A (7,4), B (-3,6) which divides the line segment joining the points A and B in the ratio 3:2 i) internally and ii) externally. Answer: x 1 = 7, x 2 = -3 y 1 = 4, y 2 = 6 m = 3, n = 2 i) Internal division: ..

If i) r>0, C divides internally. ii) r<0, C divides externally..

p and C v When the temperature of 1 mol of ideal gas is to be raised through one degree (1 K) the gas is heated at constant volume. The gas under this condition does no external work and the heat supplied increases the internal energy of the gas. When the gas is heated..

. Classical branches largely provide knowledge in the respective areas of study. Some classical branches include Taxonomy (classification), Morphology (study of external form), Anatomy (study of internal structure), Histology (study of tissues), Cell Biology (Study of cells) etc..

Two important characteristics of the desert i.e., the scarcity of rainfall and high temperature determine the existence, distribution and adaptations of the animals of the desert. The characteristic animals of the desert are small herbivorous rodents, reptiles and insects. Birds and mammals which h..

a. An internal force b. An external force c. Neither internal nor external force 4. The synonym for 'accolade' is: a. Praise b. Happiness c. Joy 5. 'To catch something by the horn' means: a. To run away from b. To confront it c. To find an excuse for 6. T..

Free living aquatic forms (freshwater or marine), some amphibious. Body is soft and unsegmented enclosed in a glandular mantle covered by usually a shell. Coelom is reduced to a pericardial cavity around the heart. Digestive system is complete. Respiratory organs are in the form of gi..

.g., nocturnal activity of some desert animals, long trips migration by many birds. E.g., Arctic terns, Siberian crane, American golden plover, Bison and caribou. vi) Homeothermy This is achieved through evaporation of sweat in the mammals from their bodies during summer and through insulation acti..

. This problem of tissue rejection can be overcome by the use of immuno suppressive drugs. 21) When the kidneys are so impaired that they are unable to excrete wastes and regulate pH and electrolyte balance in plasma, Haemodialysis is employed. 22) Advancement in Biomedical engineering has made ..

>The male gamete of one individual fertilizes the female gamete of another individual to produce the zygote. The fertilisation may be external or internal. External fertilisation takes place in animals like the fish and frog where the fertilisation takes place in water, out..