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Molecules: Intermolecular Forces 896 319 School Tutoring

Molecules: Intermolecular Forces

Intermolecular forces are the forces that exist between 2 individual molecules. This is different from intramolecular forces, which are the forces that exist within a molecule (ie. ionic/covalent bonds). Intermolecular forces are generally described by a general term, Van der Waals forces. Dipole-dipole Force – the attraction of a dipole on one molecule for the dipole of another…

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Calculating Volume for Various 3D Objects 400 231 School Tutoring

Calculating Volume for Various 3D Objects

Volume is the space enclosed by a three-dimensional object. When calculating volume, you are calculating the number of cubic units that object can hold inside. Cube Volume = s3 = s x s x s Where s is the length of the side of the cube Example: A cube with side lengths of 4 cm…

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Probability Distribution: Random Variables 150 150 SchoolTutoring Academy

Probability Distribution: Random Variables

A random variable is a function which is usually denoted by X defined on the sample space S whose range is the set of real numbers. i.e. X:S–> R is called a random variable. Example: If an unbiased coin is tossed, Then sample space S={H, T} Let X denoted the number of tails obtained. Then X(T)=1…

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Multiplication Theorem on Probability 150 150 SchoolTutoring Academy

Multiplication Theorem on Probability

The probability of happening an event can easily be found using the definition of probability. But just the definition cannot be used to find the probability of happening of both the given events. A theorem known as “Multiplication theorem” solves these types of problems. The statement and proof of “Multiplication theorem” and its usage in…

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Cognitive Friday: Raising “Reasoning” Kids 150 150 Suzanne

Cognitive Friday: Raising “Reasoning” Kids

Kids are great at coming up with reasons for things. One of the first questions that children begin to ask is “why?” and what they are looking for are the reasons which will help them understand the world around them. This does not slow down that much as children grow up, teenagers very much want…

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SAT Focus: Comma Splices and Dangling Modifiers 600 466 School Tutoring

SAT Focus: Comma Splices and Dangling Modifiers

Many students find that the SAT grammar section is a difficult and tedious part of the test. This section requires a strong knowledge of many obscure grammar rules that are seldom used in normal conversation and writing, and can cause frustration even for people who enjoy reading and writing for pleasure. Today, we will focus…

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Math Review: Adding Fractions 350 360 School Tutoring

Math Review: Adding Fractions

There are 3 simple steps to add fractions: Step 1: Make sure the bottom numbers (the denominators) are the same. Step 2: Add the top numbers (the numerators) together and put the answer above the denominator. Step 3: If it is possible, simplify the fraction.   Here are some examples to get you started. Example…

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Newton's Three Laws of Motion 557 357 School Tutoring

Newton's Three Laws of Motion

Isaac Newton(1646~1727) was one of the greatest physicist in the world. Newton’s three laws of motion can describe most of the motion in the universe. Newton’s First Law of Motion Every object in the state of uniform motion tends to stay its motion, unless external force is applied to it. This law has a name…

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Tricky SAT Grammar Rules 400 300 School Tutoring

Tricky SAT Grammar Rules

There are a number of difficult grammar rules that seem to exist solely to cause problems for students writing the SAT. Today, I will be focusing on two in particular, the distinction between ‘was’ and ‘were’, and how to distinguish a correct parallelism from an incorrect one. In order to dispel some of the confusion…

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Optics: Reflection and Refraction 415 425 School Tutoring

Optics: Reflection and Refraction

You may have seen your reflection in a mirror or maybe a rainbow pattern in a puddle of oil and wondered what exactly you were seeing. With the help of optics this can all be explained. Optics is the branch of physics where the behaviour and properties of light are studied. To understand how you…

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