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Chemistry: Empirical Formulas 150 150 SchoolTutoring Academy

Chemistry: Empirical Formulas

The empirical formula is the simplest chemical formula that shows the lowest whole number ratio of the elements in the compound. This is different from the molecular formula, which has the number of atoms of each element that make up that molecule. The empirical formula may or may not be the actual molecular formula for…

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Cognitive Dissonance 150 150 Suzanne

Cognitive Dissonance

As with meta-cognition, cognitive dissonance is one of learning’s great leaps forward. Most generally, cognitive dissonance is the moment in which a person recognizes that something does not seem right, intellectually speaking, and they are driven to figure out why that is. That combination of non-understanding with drive for understanding propels deeper knowledge on a…

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Experimental Errors, Accuracy and Precision 150 150 SchoolTutoring Academy

Experimental Errors, Accuracy and Precision

Not every measurement made is exact and there is always an uncertainty with each one. The degree of uncertainty may be high or low due to different experimental errors, but no measurement can be 100% certain. Random Errors – Unpredictable errors due to limitations on our ability to make physical measurements. – Measurements may be…

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Form and Structure: The Basics 150 150 SchoolTutoring Academy

Form and Structure: The Basics

Structures are everywhere around us, be it the building keeping us dry from the rain, or the chair keeping us from falling to the ground. Even the cup you drink from is a type of structure! There are three different fundamental types of structures: shell, frame, and solid. Shell Shell structures are supported by their…

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Introduction to Probability: Events 552 413 School Tutoring

Introduction to Probability: Events

An event is a collection of possible outcomes. For example, the act of dolling a dice is an event. The collection of possible outcomes is that you will roll a 1, 2, 3, 4, 5 or 6. When you consider the event of rolling a 6, there are two possible events: you roll a 6…

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Physics Revisit: Waves 620 324 School Tutoring

Physics Revisit: Waves

The wave is a new concept for most students. When there is only one wave, you only need to worry about four things: wavelength, frequency, amplitude and velocity. Wavelength is a distance of one complete cycle of a wave. Frequency is number of waves repeat in one second. Amplitude is a measure of height of…

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English Help: Conjunctions 150 150 SchoolTutoring Academy

English Help: Conjunctions

Sentence variety is important in any good essays. This includes using different vocabulary and sentence structures. Too much punctuation causes run-on sentences, while not enough punctuation causes short and choppy sentences. This blog is to help you connect those short sentences to create a coherent sentence with a better flow. Conjunctions are words that connect…

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Balancing Chemical Equations 150 150 SchoolTutoring Academy

Balancing Chemical Equations

The Law of Conservation of Mass states that matter cannot be created or destroyed. Thus, the mass of substances produced in a chemical reaction is always equal to the mass of reacting substances. Therefore, you need to have the same number of each type of element on each side of a chemical equation. This is…

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Polar Representation of a Complex Number 150 150 SchoolTutoring Academy

Polar Representation of a Complex Number

In polar representation, a complex number is represented in terms of two variables r and t, where r is the modulus of complex number and t is the angle with the positive direction of x-axis. We know that the modulus of a complex number z=a+ib is denoted by |z| and is defined as . We…

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Operations on Polar Form of a Complex Number 150 150 SchoolTutoring Academy

Operations on Polar Form of a Complex Number

The polar form of a complex number a+ib is a+ib = r(Cos t + i Sin t), where r is its modulus and t is its argument. As we operate on the real numbers, we can perform operations on complex numbers also. The operations on the complex numbers are as follows. Equal numbers in polar…

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