Notes, abstracts, papers, exams and problems of Secondary education

Discrete Random Variables

Discrete random variables are variables that can take on a finite number of distinct values. In simpler terms, a discrete random variable is a set of possible outcomes that is countable.

Continuous Random Variables

Continuous random variables are random variables that take an infinitely uncountable number of potential values, typically measurable amounts.

Example

1. List the sample space in the given experiment. How many outcomes are possible?

The sample space is: S = {NNN, NND, NDN, NDD, DNN, DND, DDN, DDD}

2. Count the number of defective keyboards in each outcome in the sample space and assign this number to the outcome. For instance, if you list NND, then the number of defective keyboards is 1.

The possible values of X are 0,... Continue reading "Introduction to Statistics: Discrete and Continuous Random Variables, Probability Distributions, and Sampling Techniques" »

Circulatory System

Deoxygenated blood from the body returns to the right atrium of the heart through the superior and inferior vena cavae. The right atrium contracts, pushing the blood through the tricuspid valve into the right ventricle. The right ventricle contracts, pumping the deoxygenated blood through the pulmonary valve into the pulmonary artery. The pulmonary artery carries the deoxygenated blood to the lungs, where it picks up oxygen and releases carbon dioxide through the process of gas exchange. Oxygenated blood returns from the lungs to the left atrium of the heart via the pulmonary veins. The left atrium contracts, pushing the oxygenated blood through the mitral valve into the left ventricle. The left ventricle contracts, pumping... Continue reading "Understanding the Circulatory and Reproductive Systems" »

United Nations (UN)

The UN facilitates international cooperation in law, security, development, human rights, and peace.

UNESCO

United Nations Educational, Scientific and Cultural Organization: Focuses on education, science, and culture.

FAO

Food and Agriculture Organization: Leads efforts to combat hunger and improve nutrition.

ILO

International Labour Organization: Addresses labor issues and work relations.

UNICEF

United Nations International Children's Fund: Provides aid to children globally.

WHO

World Health Organization: Coordinates international public health initiatives.

IAEA

International Atomic Energy Agency: Promotes peaceful use of nuclear energy.

NATO

North Atlantic Treaty Organization: A military alliance for collective defense.

OPEC

Organization

... Continue reading "Key International Organizations: Roles and Functions" »

The cell is the basic unit of which they are made all living things. It is the smallest unit capable of performing all the functions that characterize a living being.

Depending on whether a body is formed by one or more cells can be:

Unicellular organisms. They consist of a single cell that performs all the functions necessary for survival. Sometimes, several single-celled organisms living together colonies. (like amoeba)

Multicellular organisms. Consist of multiple cells that lose the ability to survive alone. Each cell performs a specific task, and all work together to survive the body (such as plants and animals). Our body is composed of a large number of cells. People are multicellular beings.

The cells in our body can have different shape... Continue reading "The cell, the respiratory system, the organelles, gases, diffusion, active transport ..." »

11.1. Their Great-aunt from England wants Herrnione eats ro stay with the Durrells.
11.2. They move to a villa srnaller so that they can tell Great-aunt Hermione that she cannot come to stay with thern Because they havent got enough room.
12.1. In the new town, Gerry has the opportunity to observe Sorne Ladybugs and green transparent Sorne CAJL gecko lizards.
12.2. With Mr Kralefsky, Gerry spends part of every Jesson talking about birds but I also Leams a lot of history, geography and French.
12.3. Kralefsky's mother tells Gerry that flowers talk and that they have long conversations, Although she can not understand their lan gauge.
12.4. The Magpies drop papers all over the floor and paper clips all over the carpet and bed. They make... Continue reading "My family and other animals" »

Berenice:

To begin, let us summarize the story of Edgar Allan Poe entitled "Berenice" and then analyze your story and characters.
The story begins with a reflection of Egaeus talking about his childhood, then talks about his cousin Berenice, tells how they grew up together and their different characteristics: Egaeus is described as a sickly person, wrapped in melancholy, self-contained and delivered in body and soul of intense meditation. Instead, Berenice is fast, funny and overflowing forces.
Egaeus Berenice explains that suffers from a disease that transmuted physically and morally. This was a strange illness that began as epilepsy and often ended in catalepsy (condition in which one enters a stationary state, similar to that of the dead)

... Continue reading "Analysis berenice" »

Number and Quantity Prefixes

• Mono-, Uni- (one):
  • Monodiplopia: Double vision that occurs only in one eye.
  • Unilateral: Confined to one side only.
• Bi-, Di- (two, twice, double):
  • Diplopia: Double vision.
  • Bilateral: Affecting two sides.
• Tri- (three):
  • Trigeminal nerve: The fifth cranial nerve, providing sensory innervation to the face, divided into three main branches.
• Quad-, Quadra-, Tetra- (four):
  • Quadrant: Areas divided for descriptive purposes into quadrants.
  • Tetradactyl: Having four fingers or toes on a hand or foot.
• Multi- (many):
  • Multicellular: Composed of many cells.
• Poly- (too much, many):
  • Polyuria: Excessive excretion of urine.
• Hemi-, Semi- (half or partly):
  • Hemiplegia: Paralysis of one side of the body.
  • Semicomatose: State of drowsiness and inaction, requiring

... Continue reading "Medical Terminology Prefixes and Their Meanings" »

Riba's Contribution to Poverty

Riba (usury) exacerbates poverty by exploiting people's wealth. It is a significant factor in rising prices and economic recession. Furthermore, it diminishes charitable acts and cooperation within society. From a moral standpoint, it strips human actions of their blessings. Borrowers often struggle to repay loans, ultimately leading to increased interest and indebtedness.

Risks of Accusing Chaste Women of Adultery

Accusing a chaste woman of adultery is an extremely serious offense and constitutes slander. Such accusations jeopardize her reputation and honor, leading to defamation within the community. They can also severely damage families, promote immorality, and foster animosity among people.

Benefits of Zakat

... Continue reading "Islamic Principles: Zakat, Riba, Hajj, and Social Conduct" »

Renaissance Sculpture

Influence of Classical Sculpture

Renaissance sculpture was heavily influenced by classical Greek and Roman art. Artists studied and replicated the forms and ideals of ancient sculptures.

Characteristics

• Use of various materials: marble, bronze, ceramic, and wood.
• Expansion of themes: Mythological, historical, and portraiture subjects were introduced alongside traditional religious themes.
• Two main forms:
  1. Sculptures in the round: Freestanding sculptures viewable from all angles.
  2. Reliefs: Sculptures carved on flat surfaces.
• Pursuit of ideal beauty: Artists emphasized anatomical accuracy and harmonious proportions based on the study of the human body.

The Quattrocento (15th Century)

• Florence as the leading center.
• Notable artists:
  • Ghiberti:

... Continue reading "Renaissance Art and Architecture in Italy and Flanders" »

Napoleon

In 1802, Napoleon was named First Consul for life after his victory in Italy. In 1804, he was declared Emperor. He established the Civil Code, covering marriage, divorce, education, and inheritance.

Napoleon conquered many areas of Europe and spread Enlightened policies, but Austria, Prussia, and Great Britain tried to prevent it. Napoleon also had many problems when he invaded Spain and Russia. Finally, Napoleon was defeated at the Battle of Waterloo in 1815.

Napoleon in Spain

Napoleon's Occupation of Spain

Charles IV and his minister Manuel Godoy supported Napoleon against Britain, but Spain was defeated at the Battle of Trafalgar (1805).

In 1807, Spain and France signed the Treaty of Fontainebleau, by which Charles IV let the French troops... Continue reading "Napoleon's Reign and the Spanish War of Independence" »