Clock Puzzle 5
Puzzle 1: How many times do the hands of a clock coincide in a day? A) 20 B) 21 C) 22 D) 24 Puzzle 2: How many times are the hands of a clock at right angles in a day? A) 22 Read more about Clock Puzzle 5[…]
Category: ALL
Angle between Two Intersecting Circles
Angle of intersection of Two Circles: The angle of intersection of two circles is defined as the angle between the tangents to the two circles at their point of intersection. Let, x² + y² + 2g₁x + 2f₁y + c₁ = 0 x² + y² + 2g₂x + 2f₂y + c₂ = 0. . Orthogonal Read more about Angle between Two Intersecting Circles[…]
Puzzles [With Answers]
Puzzle 1: What time should the last watch show?Answer: 3:36 Explanation: On each watch, the time shown contains two digits that are the same. Puzzle 2: Where should the missing hand point to?Answer: To the 8 Explanation: Start with the top clock face and move clockwise around the others. The sum of the numbers pointed to by the 2 hands follows Read more about Puzzles [With Answers][…]
Types of colloidal solution
Depending on dispersion medium and dispersed phase: Dispersion medium Dispersed phase Type of colloid Solid Solid Solid sol Ex: gem stones, glasses Liquid Gel Ex: cheese, butter, gelatin Gas Solid foam Ex: pumice stone Liquid Solid Sol Ex: paints, ink, blood Liquid Emulsion Ex: milk, mayonnaise, hand cream Gas Foam Ex: whipped cream, shaving cream Gas Solid Solid aerosol Ex: smoke, ice cloud, atmospheric Read more about Types of colloidal solution[…]
Puzzles
Puzzle 1: What time should the last watch show?Puzzle 2: Where should the missing hand point to?Puzzle 3: Which letter replaces the question mark?Puzzle 4: Which letter replaces the question mark?Puzzle 5: Which letter replaces the question mark? Share Tweet View Email Print Follow
Inductor in Series and Parallel
Inductor in series and parallel: We shall first consider an ideal voltage source applied to the series combination of N inductors. Applying KVL to the original circuit, Vs = V₁ + V₂ + … + Vn But for the equivalent circuit we have, And thus the equivalent inductance is Leq = (L₁ + L₂ + Read more about Inductor in Series and Parallel[…]
Brain Teaser 9 [With Answers]
Puzzle 1: Fill in the blanks with a word which makes two different words if you read from both sides: Tim’s father has kept his ______ in the ______ for scoring good marks in math. Answer: Reward and Drawer. Puzzle 2: There are 17 pigeons sitting in a row on a wall. A boy shoots the fifth pigeon. Read more about Brain Teaser 9 [With Answers][…]
Equation of Normal
Normal: The normal at any point P of the centre is the line which passes through P and is perpendicular to the tangent at P.Equation of Normal: i. The equation of the normal at p(x₁, y₁) of the circle. ⇒ S = 0 ⇒ x² + y² + 2gx + 2fy + c = 0 Read more about Equation of Normal[…]
Brain Teaser 9
Puzzle 1: Fill in the blanks with a word which makes two different words if you read from both sides: Tim’s father has kept his ______ in the ______ for scoring good marks in math. Puzzle 2: There are 17 pigeons sitting in a row on a wall. A boy shoots the fifth pigeon. How many pigeons Read more about Brain Teaser 9[…]
Adsorption II
Adsorption isotherms: Plot of the amount of gas adsorbed on the surface of the adsorbent and pressure at constant temperature. 1. Freundlich adsorption isotherm: (n > 1) … 1 x = mass of the gas adsorbed m = mass of the adsorbent P = pressure k, n = constants. Depend on the nature of Read more about Adsorption II[…]