Notes, summaries, assignments, exams, and problems for Technology

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Understanding Density, Pressure, and Fluid Systems

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Know what the relationship is between density and temperature

Substances have different densities depending on their temperature.  

For example, a lake on a hot summer day. The surface temperature is warmer than the water beneath. The warm water floats on the cold because it has a lower density. 

Know why your ears pop when you are landing at an airport

Your ears pop from pressure change. The change of pressure outside causes your middle ear to have to readjust, resulting in a popping sound

Know the term buoyancy and why objects sink or float in a substance

Buoyancy is the ability of an object in a fluid to rise or sink due to density differences with its surroundings.

Know the densities of some common substances

Sea water

1.03g/mL

distill

1g/mL

Know

... Continue reading "Understanding Density, Pressure, and Fluid Systems" »

Document Editing & Formatting: Symbols, Text, and Layout Tools

Classified in Technology

Written on in English with a size of 4.63 KB

  • Archive
  • Start
  • Insert
  • Options
  • Information
arrow_drop_uparrow_drop_down
arrow_drop_down

arrow_drop_down

arrow_drop_down

Source
text_fieldsTitlearrow_drop_downarrow_drop_downarrow_drop_down
Paragraph
document-size.png
Size
arrow_drop_down
Zoom
arrow_drop_down
Line spacing
arrow_drop_down template.png
Template
arrow_drop_down web-search.png
Search documents
compress-text.png
Compress text
panic.svg
Hide
Cheat sheet
CopyCutPaste

Search

Editing
Table
picture.png
Image
link.png
Link
horizontal-line.png
Separator
quote.png
Quote
Elements

Greek letters

αβΓγΔδεζηΘθικΛλμνΞXiοΠπρΣστυΦφχΨψΩω

Maths

¹²³ⁿ‰∂∫∆∑∏√∞∩⅞≈≠≤≥÷½⅓⅔¼¾⅛⅜⅝

Arrows

←↑→↓↔↕

Various

•♪♫♀♂♠♣♥♦©®™¬

Currencies

€$£¢¥¤₧₨₩
Symbols
WidthHeight
Unit
Centimeters
document-size.png
Size
arrow_drop_down
Size
preview.png
Preview
arrow_drop_down
Zoom
arrow_
... Continue reading "Document Editing & Formatting: Symbols, Text, and Layout Tools" »

How to Check Your Vehicle's Oil Level

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Written on in English with a size of 988 bytes

To find out whether your vehicle needs oil, follow these steps:

  1. Pull out the dipstick and wipe it off on a clean lint-free rag (be sure the engine is cold).
  2. Insert the stick back into the pipe.
  3. Pull the dipstick out again and look at the film of oil on the end of the stick.
  4. Put the dipstick back into the pipe. You're done!

Specifications:

Two-door, mid-engine, four-wheel drive sports car. The engine is a 6.2-liter V12 with 571 bhp. The acceleration is 0-60 mph in 3.8 seconds with a top speed of 205 mph. The doors do not open conventionally.

Abbreviations:

  • FWD: Front Wheel Drive
  • bhp: Brake Horse Power
  • g/km: Grams per Kilometer
  • gdi: Gasolina Direct Injection
  • MPG: Miles per Gallon
  • MPH: Miles per Hour
  • NM: Newton Meters
  • RPM: Revolutions per Minute
  • RWD: Rear Wheel
... Continue reading "How to Check Your Vehicle's Oil Level" »

The Evolution of Travel Distribution: From GDS to NDC

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Written on in English with a size of 2.9 KB

New Distribution Capability (NDC)

NDC forced GDSs to implement more modern data transmission channels to distribute ancillaries to customers.

It is based on a new, single, flexible, and standard language for all air content.

Benefits of NDC

The technology behind this distribution system is planned to generate the following benefits:

  1. Encourage innovation, personalization, and brand recognition;
  2. Enable further product differentiation and faster time-to-market;
  3. Offer travel sellers easier access to real-time, accurate data, rich imagery,
  4. Provide exciting new offers created by airlines;
  5. Travelers can enjoy more services and a more personalized travel experience;
  6. Offer more options for travel sellers (e.g., concert tickets, etc.). More options mean more revenue
... Continue reading "The Evolution of Travel Distribution: From GDS to NDC" »

Man at Arms Recreates Elucidator Sword from Sword Art Online

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Written on in English with a size of 2.02 KB

He has been a blacksmith for over 30 years and has created weapons for over 200 films. This is Man at Arms.

"The weapons of anime are always my favorite, and I know that the fans have been asking for this for a long time. This is Elucidator from Sword Art Online." He begins by sketching the Elucidator by hand and transferring the design onto 1075 SQT steel. Using a band saw with a bimetal blade, he cuts out the heart of the sword and refines the edges with a belt sander. He marks the internal cut with a soapstone marker and uses a plasma cutter to create the symbol. Another piece, cut from 3/8 gauge carbonized steel, will cover the main section. The edges are leveled, the surface is polished, and any leftovers are trimmed with a Dynafile.

Crafting

... Continue reading "Man at Arms Recreates Elucidator Sword from Sword Art Online" »

Applying to a French University: Steps, Requirements, and Costs

Classified in Technology

Written on in English with a size of 2.14 KB

At the Beginning

Tout d'abord = First of all
Lorsque = When
ils doivent = they must
Un dossier = transcript/file
Le renvoyer = to send back
Au plus vite = As quickly as possible
A laquelle = To which
L'inscription = Application
On desire s'inscrire = People want to apply
Ainsi que = As well as
ils souhaitent etre admis = they wish to be admitted
Meme si = even if
Si l'on est parmi ceux = if you are among those
La filiere = field
L'etablissement = establishment
Tout bachelier = each graduate
en fin de compte = eventually/fianlly
Avant le debut de = before the start of
On est inscrit pour = they applied to
la gestion = management
pendant environ = for about
la moitie = path
mener a = lead to
langue etrangere = foreign language
faire partie de = to belong to/ to be part
... Continue reading "Applying to a French University: Steps, Requirements, and Costs" »

The Importance of Recycling: Types and Benefits

Classified in Technology

Written on in English with a size of 2.22 KB

Hello, I'm Laura and I'm going to talk about recycling.

- Recycling is a process whose objective is to convert waste into new products or raw materials for later use. Thanks to recycling, the disuse of useful materials is prevented, the consumption of new raw materials is reduced, in addition to reducing energy use, air and water pollution, and also reducing greenhouse gas emissions compared to the production of plastics.
Recycling is a key component in contemporary waste reduction and is the third component of the 3Rs (reduce, reuse, and recycle).
Types of bins for recycling: there are many types of containers for recycling, one for each category.
Blue bin (paper and paperboard): cardboard containers, boxes, trays... must be deposited in this
... Continue reading "The Importance of Recycling: Types and Benefits" »

Oracle SQL Object Types and Tables

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Written on in English with a size of 3.3 KB

Important Oracle SQL Data Dictionary Views

Important Oracle SQL tablespaces views include: dba_tablespaces, dba_data_files, dba_tables, user_types, user_source.

Creating Complex Object Types

CREATE OR REPLACE TYPE direccion AS OBJECT(
    calle VARCHAR2(50),
    numero NUMBER(3),
    piso NUMBER(2),
    puerto VARCHAR2(1),
    codpostal NUMBER(5),
    localidad VARCHAR2(50),
    provincia VARCHAR2(50)
);

CREATE OR REPLACE TYPE persona AS OBJECT(
    dni VARCHAR2(9),
    nombre VARCHAR2(50),
    apellido1 VARCHAR2(50),
    apellido2 VARCHAR2(50),
    telefono NUMBER(9),
    fecha_nac DATE,
    direccion direccion
);

Creating Tables Using Object Types

CREATE TABLE agenda OF persona;

DESC agenda; -- Visualize table structure


CREATE TABLE agenda2
... Continue reading "Oracle SQL Object Types and Tables" »

Arduino Electronics Guide: Understanding Basic Components and Concepts

Classified in Technology

Written on in English with a size of 1.61 KB

Resistors

  • Longer side on positive
  • Limit current through circuit
  • Measured in ohms (Ω)

Voltage, Current, and Resistance

  • Voltage (V): Exerted force to push electricity
  • Current (I): Amount of electricity pushed (measured in Amps)
  • Resistance (R): Constraints on the flow of electricity
  • V = I*R, R=V/I, I=V/R

Diodes

  • Act as stop-gap gates
  • Ensure electron flow in intended direction

Motors

  • Regular DC motors: Spin at various speeds
  • Servo motors: Directional control, moving arm from controllable positions

Serial Communications

  • Used to print values to Serial Monitor
  • Good for troubleshooting

LEDs

  • Light Emitting Diodes
  • Light up when required forward voltage is found
  • Intensity of light depends on current flow

Photodiodes

  • Trip to reception of light, not emission of it
  • Basics of solar
... Continue reading "Arduino Electronics Guide: Understanding Basic Components and Concepts" »

Jet Engine Fundamentals and Operations

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Written on in English with a size of 5.33 KB

What is the Difference Between Principle - Principle of Operation?

Brayton Cycle

The continuous combustion cycle.

How Does Engine Thrust Vary?

Low temperature gives greater thrust.

Which Statement is True?

At lower engine speeds...

Static Thrust is Developed

Aircraft on the ground and stationary.

The Fan Bypass Ratio (BPR)

The mass ratio of air that passes...

P2 and P7 Sensors are Pickups for

Inlet and outer pressures.

Thrust

Increases with an increase in speed.

EPR (Engine Pressure Ratio) is

The main parameter that shows the thrust produced.

Compressor Inlet Screens

For protection against Foreign Object Debris (FOD).

Intakes are Designed to

Decelerate the free air stream.

What is the Shape of a Jet Engine Air Intake?

Divergent

Compressor Stall

Is the airflow separation... Continue reading "Jet Engine Fundamentals and Operations" »