Teaser 1: I am married woman, john’s son is my daughter’s father. What is my relationship to john? Answer: Daughter – in – law Explanation: Her daughter’s father is her husband. This means john’s son is her husband, so john is her father – in – law, making her the daughter – in – law. Read more about Brain Teaser 12 [With Answers][…]
Lanthanides: Lanthanides consist of elements that follow lanthanum and involve the filling of 4f subshell. Electronic Configuration: [Xe] 4fn+1 5d° 6s2 or [Xe] 4fn 5d1 6s2 The general valence shell electronic configuration of lanthanides is 4f1−146s2. Atomic and Ionic Sizes of Lanthanides: Atomic and ionic radii of lanthanides decrease with an increase in atomic number. This gradual decrease is known as lanthanides contraction. Because Read more about Inner Transition Elements (f – block) – Lanthanoids[…]
Teaser 1: I am married woman, john’s son is my daughter’s father. What is my relationship to john? Teaser 2: How do you get 24 from 9, 6, 11 and 3, using addition, subtraction, multiplication or division? Teaser 3: A milkman has 2 empty jugs: a 3 gallon jug and a 5 gallon jug. How Read more about Brain Teaser 12[…]
Sometimes we are interested to replace a relatively complicated resistor combinations with a single equivalent resistor, especially when we are not interested in the current, Voltage or power associated with any of the individual resistors in the combinations. All the current, voltage and power relationships in the remainder of the circuit will be unchanged. Consider Read more about Resistors in Series and Parallel[…]
Puzzle 1: A man was outside taking a walk, when it started to rain. The man didn’t have an umbrella and he wasn’t wearing a hat. His clothes got soaked, yet not a single hair on his head got wet. How could this happen? Answer: The man was bald. Puzzle 2: A cowboy rides into Read more about Puzzle 4 [With Answers][…]
Terms Related to an Ellipse: Fundamental Terms Ellipse (Horizontal ellipse) Conjugate Ellipse(Vertical ellipse) (a) Equation x²/a² + y²/b² = 1 (a > b) x²/a² + y²/b² = -1 (a < b) (b) Graph (c) Centre C (0, 0) C (0, 0) (d) Vertices (±a, 0) (0, ±b) (e) Length of major axis 2a 2b (f) Read more about Ellipse[…]
Rate is defined as the change in the amount of the substance or concentration of the substance with respect to time. . Let us consider a general reaction, Reactants → Products During the progress of a chemical reaction, Concentration of the reactants are decreases with time and concentration of products increases with time. The following Read more about Rate of a Chemical Reaction[…]