Science & Maths

There are 86,400 seconds in a day, 604,800 seconds in a week, 31,536,000 seconds in a common year and 31,622,400 seconds in a leap…Read More →

Supplementary angles are two angles whose measures add up to 180°. Each angle is called the supplement of the other, so the supplement of…Read More →

The molar mass of NaOH (sodium hydroxide) is 40.00 g/mol (39.997 g/mol using precise atomic masses). You get it by adding the atomic masses…Read More →

The chemical name of NaHCO3 is sodium bicarbonate, also written as sodium hydrogen carbonate. Its common name is baking soda, and its molar mass…Read More →

Air resistance, also called air drag, is the force that air exerts on a moving object in the direction opposite to its motion. At…Read More →

Butanoic acid, also called butyric acid, is a four-carbon carboxylic acid with the formula C4H8O2 (CH3CH2CH2COOH) and a molar mass of 88.11 g/mol. It…Read More →

The cosine rule (law of cosines) states that in any triangle c² = a² + b² − 2ab cos C, where C is the…Read More →

Mechanical energy is the sum of the kinetic energy and the potential energy of a body: ME = KE + PE. It is the…Read More →

Newton’s second law of motion states that the net force on a body equals the rate of change of its momentum, F = dp/dt.…Read More →

The volume of a cone is V = (1/3)πr²h, where r is the base radius and h is the perpendicular height. A cone holds…Read More →

The kinematic equations are four formulas that link displacement (s), initial velocity (u), final velocity (v), acceleration (a) and time (t) for motion in…Read More →

The greater than sign (>) shows that the value on its left is larger than the value on its right. “7 > 4” is…Read More →