Notes, summaries, assignments, exams, and problems for Primary education

True/False

t: A strong acid is one that will completely ionize

f: When blue litmus paper is placed in a weak acid, it will turn a darker shade of blue

f: When pH paper provides a reading which says it has a pH of 9, the substance is considered a weak acid.

f: Alpha, Beta, and Gamma are all forms of nuclear radiation that contain either positive or negative charges.

t: Fission is the process where a large nucleus splits unto two smaller nuclei.

f: The most common isotope of carbon that is used for radioactive dating is carbon-13.

t: Static friction is friction that occurs when an object is not moving.

f: When an object is accelerating but it is not traveling in a straight line, it must be moving vertically.

t: Friction is force that always opposes the... Continue reading "Science True/False and Multiple Choice Questions" »

Trans - across

Re - again

Super - big / more than normal

Extra - outside

Hyper - very big / much more than normal

Anti - against

Pro - in favour of

Examples:

• Overeat: eat too much
• Unpaid: not paid enough
• Ex-girlfriend: former girlfriend
• Under-charge: por debajo
• Pro-European: europeo a tope
• Intercontinental o transcontinental:
• Anti-war: anti guerra
• Superstar: superestrella
• Retaking: volver a hacer
• Supermarket

We sometimes use a hyphen (-) after a prefix, especially when:

• The prefix ends with the same letter that the word begins with.
• The word is a name, which begins with a capital letter.
• After the prefix ex-.

English Grammar Essentials

English Verb Tenses

Present Tenses

• Present Simple: I work, I don't work.
• Present Continuous: I am working, I am not working.
• Present Perfect: I have worked, I haven't worked.
• Present Perfect Continuous: I have been working, I haven't been working.

Past Tenses

• Past Simple: I worked, I didn't work. Common time expressions: last week, yesterday, ago.
• Past Continuous: I was working, I wasn't working. Common time expressions: at that moment, while, when.
• Past Perfect: I had worked, I hadn't worked. Common time expressions: never, since, for, already, just, still, yet, before.
• Past Perfect Continuous: I had been working, I hadn't been working.

Future & Conditional Tenses

• Future Simple (Will): I will work, I won't work.
• Future Simple

The Iberian Pig

The Iberian pig has dark skin with a sparse coat, a pointed snout, and long, slender legs. The genetic trait of this breed is its ability to store fat in muscle tissue, the key to the unmistakable flavor and texture of Iberian hams.

Grazing in the Dehesa

Here, pastures are in fact open woodlands of holm oaks and cork oaks. A traditional, well-balanced diet that is essential to the quality of its meat. The dehesa pastureland is one of the best-preserved ecosystems in Europe, where Iberian pigs breed side by side with wild species, such as rabbits, lizards, or imperial eagles.

Forest Exploitation

Advantages

• The production of wood (to create houses).
• The production of paper (to write).
• The production of furniture.
• Cork
• Resin

Disadvantages

• Forests

Angular Kinetics

Center of Mass

Point around which mass or weight is considered to be concentrated.

Determining COG

• Balance method
• Suspension method
• MRI reconstruction
• Segmental

Segmental Limitation

• Based on Caucasian male cadavers
• Completed in 1930s
• Based on segments being truncated cones

Mechanical Stability

Ability to maintain vertical projection of CG within base of support.

Ways to Increase MS

• Increase mass
• Increase friction between body and surface
• Increased size of base support

Angular Inertia

Property of an object to resist changes in its angular motion.

Factors Influence

Radius has larger influence than mass.

Center of Mass

Point where gravitational force is applied balance

Radius of Gyration

Point where mass can conceptually be concentrated such that it does... Continue reading "Angular Kinetics and Biomechanics" »

Linear Kinetics

Law 1 of Inertia: object at rest and no external forces acting on it remains at rest, object in motion stays in motion, object at rest stays at rest, Law 2 of Acceleration: Change in motion is proportional to the force impressed and is made in direction of straight line. Force causes acceleration Law of Reaction: forces never act in isolation, but in pairs, forces equal to magnitude, in opposite direction. Conservation of Momentum: momentum before impact equals momentum after impact Impulse-momemtum: Ft=m(VF-VI) M=mv I=Ft

Torques & Moments

Torque: turnin effect produced by force aka moment, angular or rotary force, directly proportional to magnitude of force. Motion of a restrained system, force applied away from axis. Moment

International Trade Policy Analysis

Impact of a 20% Tariff on Personal Computers

Given the following information, we will calculate the cost to consumers, the benefit to producers, the change in government revenue, and the deadweight costs of a proposed 20 percent tariff on personal computers.

Calculations for the 20% PC Tariff

With a 20% tariff, the price of personal computers increases from $2,000 to $2,400 (a $400 increase).

• Cost to Consumers (Loss in Consumer Surplus):
  The total loss in consumer surplus is the area of the trapezoid

Part IV: A Voyage to the Country of the Houyhnhnms

1. Arrival and First Encounters

After being abandoned by pirates, Gulliver encounters a race of hideous, deformed, and savage humanoid creatures called Yahoos, towards whom he feels a strong aversion. Soon after, he meets the Houyhnhnms, a race of intelligent horses who rule over the Yahoos.

2. The Nature of Houyhnhnms

Gulliver learns that "Houyhnhnm" translates to both "horse" and "perfection of nature" in their language. He explains human society to the Master Horse, who is unfamiliar with concepts like deception, power, greed, lust, or envy.

3. Human Nature and War

The Master Horse inquires about the causes of war among humans. Gulliver explains three main reasons: ambition for conquest, government... Continue reading "Gulliver's Travels Among the Houyhnhnms" »