pc cases

C divides AB internally. Let A (x 1 , y 1 ) and B (x 2 , y 2 ) be the two points joined by line segment AB. Let C (x, y) be the point on the line segment such that (In this case, AC and CB are real in the same direction on the line AB.) Draw AP, CR and BQ perpendicular to x-axi..

C divides AB externally. From the similar triangles, CAM and CBN, we have ..

For the virtual image, the point lies close to the pole of refracting surface. In this case the refracted rays PC and AB do not meet actually at any point but appear to come from a point I as shown below. Let the point object lie on the principal axis. A ray of light meets ..

As in the case of S, the important oxidation states observed for Se and Te are also 2, +2, +4 and +6. The chalcogenide dianions (E 2 - ) exist only in their compounds with the most electropositive elements. By and large, chalcogens with the exception of polonium, display non-metallic cova..

It is a type of supporting tissue in which matrix is hard and solidified due to the presence of more of inorganic substances. The inorganic salts in the matrix account for nearly 60% of the total chemical composition. Among the inorganic salts, calcium phosphate accounts for about 80% calcium carbo..

A formula is formed by using:A formula is formed by using: (a) mathematical symbols and variables (b) given conditions, and (c) simplification. Some well known formulae are listed below: Area of a rectangle A = l x b A = Area l = Length b = Breadth Perimeter of a rectangle P = 2(l + b) P = Per..

+ Water + + HCl CaCl 2 + H 2 O + CO 2 On the right side, there are 2 atoms of chlorine and 2 atoms of hydrogen. So add 2 in front of HCl. CaCO 3 + 2 HCl CaCl 2 + H 2 O + CO 2 To Check Ca = 1 Ca = 1 C = 1 C = 1 O = 3 O = 3 H = 2 H = 2 Cl = 2 Cl = 2 Example 3: Lead nitra..