Notes, abstracts, papers, exams and problems of Physics

Vocab. 1

:

• go shopping
• hang out (penjar)
• listen to music
• play computer games
• read a magazine
• surf the net (navegar)
• watch sport on TV
• dull (avorrit)
• enjoyable (agradable)
• exciting
• frustrating
• interesting
• relaxing
• average (mitjana)
• correlation
• less than half (menys de la meitat)
• majority
• minority
• percentage
• survey (enquesta)

Vocab. 2

:

• adventure
• characters (personatges)
• context
• fantasy
• legend
• myth (mite)
• plot (trama)
• scene
• science fiction
• sript (guió)
• story
• tale (conte)
• angry
• comical
• courageous
• cowardly
• resourceful (ingeniós)
• sentimental
• spiteful (malèvol)
• genre
• metaphore
• moral
• setting (configuració)
• simile
• synopsis
• check over (revisar)
• come to
• come up with (presentar)
• work at
• go back to
• get across
• turn over (entregar)
• write down (apuntar-se)
• carefully
• completely
• convincingly
• daringly (atrevidament)

two different sxool          te greates invention               working for free

1.Te britis: as been            1.Wy does:sow ow                        1.Wy does:wiy elp

2.Steiner: are currently       2.Ow does:someting              2.Wy are:tink young

3.Te steiner: focuses          3.Ow as:as access                         3.Ow do:tey are

4.wat does: it demonstrates    4.wix statement:is idea  4.Dawn morgan:tinks

5.Wix statement: can learn       5.Wy: can comunicate    5.For lew:attitude

6.Eurytmy: a system             6.Wix activity:watxed            6.Ozarow:companies

7.Te uk: is starting              ... Continue reading "Invention by experience" »

Review

1 Balancing Moments

• seesaw: sube y baja 4
• Perpendicular: At a 90 degree angle to something
• Newton: The unit of measurement of force
• Clockwise: In the same direction as the movement of the hands on a clock
• Counterclockwise: In the opposite direction to the movement of the hands on a clock

Diagram

• a-You have to calculate the moment
• b-The wheel turns more easily when you spin it from near the rim. The distance

M=fd
F=30N
M=fd

Left is 2FI, same result
d=15cm
M=(30) (0.15)=4.5

Right is 2dF, same result
0.15m
M=4.5Nm

2 Making a Scale

• Spring constant: A measure of how stiff or strong a spring is
• Extension: The increase in the length of something
• Elastic: A material able to resume its original shape after being stretched or compressed
• Elastic Limit: The extent to

Who Discovered the Finite Speed of Light?

Ole Romer, a Danish astronomer, discovered that light is not instantaneous. He observed that the emergence of Io from behind Jupiter varied depending on the position of the two planets in the sun's orbit. This led him to realize that light takes time to travel from Jupiter to Earth, causing the observed differences in emergence time.

Understanding the Speed of Light

The speed of light is a fundamental constant, moving through space at a finite speed of 299,792,458 meters per second.

Exploring Light Years and Galaxies

A light year is both a measure of distance and time, representing the distance light travels in one year. Andromeda, a spiral galaxy, is nearly the same size as the Milky Way and is home to... Continue reading "Unveiling the Mysteries of Light and the Universe" »

Eric Blair, better known as George Orwell, was born in 1903 in Bengal, in the then British colony of India. English novelist, essayist, journalist, and critic. Orwell was closely connected to his work, in the sense that both he and his writing were the same – he liked to write from experience, which is not very usual among writers.

As for his family, they were from the middle-class. He wasn't very close to his father. His mother took him to England when he was very young, where he had a happy childhood in the countryside and developed an appreciation for the rural English landscape.

At the age of 8, Eric Blair started studying in one of the most successful boarding schools in England at the time: St Cyprian's School. Young Eric attended St... Continue reading "George Orwell: A Life of Struggle and Triumph" »

Voltage: Energy per Electron Provided by the Battery

Energy spent by each electron in a receiver.

Electric Resistance: Opposition of a Material to the Flow of the Electric Current

Electric Current: Number of Electrons that Flow Through the Conductor in 1 Second

Magnitude

• Voltage: V (volts)
• Electric Current: A (amps)
• Resistance: Ω (ohms)
• Power: W (watts)
• Energy: I or KWH (joules)

Alternating Current

• Generated in power plants
• V and I change with time (50 times in 1 second)
• Electrons change their direction of movement
• Consumed by lamps

Direct Current

• Produced by batteries and solar cells
• I and V are constant
• Electrons move always in the same direction
• Consumed by TV, control, alarm clock, calculator, mobile phone, laptop, computer

AC/DC

Effects of Electric Current

• Heat
• Light:

Key Facts

Full Title · Death of a Salesman: Certain Private Conversations in Two Acts and a Requiem

Author · Arthur Miller

Type Of Work · Play

Genre · Tragedy, social commentary, family drama

Language · English (with emphasis on middle-class American lingo)

Time And Place Written · Six weeks in 1948, in a shed in Connecticut

Date Of First Publication · 1949

Original Publisher · The Viking Press

Climax · The scene in Frank’s Chop House and Biff’s final confrontation with Willy at home

Protagonists · Willy Loman, Biff Loman

Antagonists · Biff Loman, Willy Loman, the American Dream

Setting (Time) · “Today,” that is, the present; either the late 1940s or the time period in which the play is being produced, with “daydreams” into Willy’s... Continue reading "Death of a Salesman: Key Facts, Themes, and Motifs" »

Extrasolar Planets

An extrasolar planet is a planet orbiting a star other than our Sun. There are two general ways of learning about a distant object: directly, which means by obtaining images or spectra of the object, and indirectly, which means by inferring the object’s existence or properties without actually seeing it. There are two major indirect approaches to finding and studying extrasolar planets:

1. Observing the motion of a star to detect the subtle gravitational tugs
2. Observing changes to a star’s brightness that occur when one of its planets passes in front of the star as viewed from Earth.

Planets exert gravitational tugs on their star, causing the star to orbit around the system center of mass. Gravitational tugs: we can detect a... Continue reading "Discovering Extrasolar Planets: Methods and Significance" »

Introduction