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127: Newtons Laws of Motion
128: Types of Circuit
129: Conductors / Insulators
130: Electrostatic Induction
131: Electromagnetism
132: Charge / Current / Voltage / Resistance
133: Digestion
134: BioChemistry
135: Health Hazards of Smoking
136: Sören Sörenson and the pH scale
137: The Acid Base Theory of Brønsted and Lowry
138: Acid Base Theories: Svante Arrhenius
139: Early Acid Base Theories: Lavoisier and Davy
140: The Observable Properties of Acids and Bases
141: Software Development Process Flow Diagram
142: Unit 2 Outcome 5 - Operations Management
143: Unit 2 Outcome 4 - Human Resource Management
144: Unit 2 Outcome 3 - Finance
145: Unit 2 Outcome 2 - Marketing
146: Unit 2 Outcome 1 - Internal Organisation
147: Unit 1 Outcome 3 - Decision-Making in Business
148: Module PH09 Notes
149: Module PH08 Notes
150: Jack's Chemistry Revision Notes
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Latest Articles
126: Weight / Gravity / Energy / Work
Weight and Gravity
The weight of an object is the force of gravity acting on it. It is calculated using the following formula:
Weight (N) = Mass (kg) x g (N/kg or m/s2..
127: Newtons Laws of Motion
First Law
If no forces acts on an object or the forces on it are balanced then
it will either remain at rest, or move with a constant velocity.
One example is that of a book resting on a table. The w..
128: Types of Circuit
Series Circuits
Components are connected from end to end
Total resistance is the product of all the resistances added together
If one component is removed or disconnected the circuit is broken
..
129: Conductors / Insulators
Most materials fall into two groups:
Conductors - allow electrons, and therefore a current, to flow through them.
Insulators - do not conduct electricity
An insulator may act as a store of..
130: Electrostatic Induction
Electrostatic induction can be demonstrated using small pieces of paper
and a polythene rod. The rod is negatively charged prior to the
experiment by vigorously rubbing it with a cloth. It is then pla..
131: Electromagnetism
This is the idea that magnetism can travel from one object to another
even though they are insulated. An example of how magnetic induction is
used is in transformers. Two coils of wire are wrapped aro..
132: Charge / Current / Voltage / Resistance
Charge
The charge is the amount of electricity travelling through a circuit
The symbol for charge is Q
The unit for charge is coulombs
A capacitor is a device that stores charge
Charge (Q) = ..
133: Digestion
The Vertebrate Digestive System
- the digestive system functions to break down the macromolecules
found in the diet into usable forms for the body
- ..
134: BioChemistry
- organic chemistry ? the chemistry of carbon found in living things
- of all of the molecules in living things, 50-95% is water (h..
135: Health Hazards of Smoking
Health is the most precious thing a person can have. But we start to value something only when it is lost. When in old age you feel ache of bones and the whole body, regrets about the damage you?ve..
136: Sören Sörenson and the pH scale
I. Short Historical Introduction
In the late 1880's, Svante Arrhenius proposed that acids were
substances that delivered hydrogen ion to the solution. He has also
pointed out that the law of mass ac..
137: The Acid Base Theory of Brønsted and Lowry
I. Introduction
In 1923, within several months of each other, Johannes Nicolaus
Brønsted (Denmark) and Thomas Martin Lowry (England) published
essentially the same theory about how acids and bases b..
138: Acid Base Theories: Svante Arrhenius
I. Introduction
Svante Arrhenius was one of the towering giants of chemistry in
the years surrounding the turn of the century. His most important
contribution to chemistry was also his first - the id..
139: Early Acid Base Theories: Lavoisier and Davy
I. Antoine Lavoisier
His basic idea was that acidity was caused by the presence of
oxygen in the compound. In fact, Lavoisier (in September 1777) created
the word oxygen. From the Greek (oxys = sour ..
140: The Observable Properties of Acids and Bases
The word acid and alkaline (older word for base) are derived from direct sensory experience.
Acid Property #1. The word acid comes from the Latin word acere,
which means "sour." All acids..
141: Software Development Process Flow Diagram
[remotely hosted] A flow diagram, designed to be printed and displayed on a wall, which illustrates the software development process.
..
142: Unit 2 Outcome 5 - Operations Management
[remotely hosted] Detailed notes covering the last outcome of Unit 2.
..
143: Unit 2 Outcome 4 - Human Resource Management
[remotely hosted] Detailed notes covering the fourth outcome of Unit 2.
..
144: Unit 2 Outcome 3 - Finance
[remotely hosted] Detailed notes covering the third outcome of Unit 2.
..
145: Unit 2 Outcome 2 - Marketing
[remotely hosted] Detailed notes covering the second outcome of Unit 2.
..
146: Unit 2 Outcome 1 - Internal Organisation
[remotely hosted] Detailed notes covering the first outcome of Unit 2.
..
147: Unit 1 Outcome 3 - Decision-Making in Business
[remotely hosted] Detailed notes covering the last outcome in Unit 1.
..
148: Module PH09 Notes
9.4 Towards absolute zero
At absolute zero,
an ideal gas has no
energy at all
a real gas will have
some energy, (due to it's
mass), the zero point energy
A Reversible
process is
a
process whi..
149: Module PH08 Notes
8.1.1 Impedance
Definition: Impedance is the
resultant of the reactance and resistance of the circuit.
Z
= V0 /
I
Reactance of a capacitor, XC
= VC / I
Reactance of an inductor, XL
= VL / I
8..
150: Jack's Chemistry Revision Notes
A level chemistry revision notes. From topic 1 to 6.
Jack's
Chemistry Revision Notes
or...
Why you'd
have to be mad to study chemistry
VERSION
0.2.0 - 16 MAY 1999
Atomic
Structure (1.1)
..
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