Month: August 2013

Newton’s laws


Definition 1: Newton’s first law of motion An object continues in a state of rest or uniform motion (motion with a constant velocity) unless it is acted on by an unbalanced (net or resultant) force. Definition 2: Newton’s second law of motion If a resultant force…

PERCENTAGE COMPOSITION


Knowing either the empirical or molecular formula of a compound, can help to determine its composition in more detail. The opposite is also true. Knowing the composition of a substance can help you to determine its formula. There are four different types of composition problems that…

Redox reactions


https://maimelatct.wordpress.com/ Chipa Thomas Maimela‘s insight: Redox reactions involve the exchange of electrons. One ion loses electrons and becomes more positive, while the other ion gains electrons and becomes more negative. To decide if a redox reaction has occurred we look at the charge of…

Series resistors


https://maimelatct.wordpress.com/ Chipa Thomas Maimela‘s insight: When we add resistors in series to a circuit: There is only one path for current to flow which ensures that the current is the same at every point in the circuit. The voltage is divided across the resistors. The voltage across…

Parallel Resistors


https://maimelatct.wordpress.com/ Chipa Thomas Maimela‘s insight: When we add resistors in parallel to a circuit: There are more paths for current to flow which ensures that the current splits across the different paths. The voltage is the same across the resistors. The voltage across the battery in the…

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