Notes, abstracts, papers, exams and problems of Physics

Sort by
Subject
Level

Optics

Classified in Physics

Written at on English with a size of 4.1 KB.

charge conservation is the principle that the total electric charge in an isolated system never changes.[1] The net quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved. Charge conservation, considered as a physical conservation law, implies that the change in the amount of electric charge in any volume of space is exactly equal to the amount of charge flowing into the volume minus the amount of charge flowing out of the volume. In essence, charge conservation is an accounting relationship between the amount of charge in a region and the flow of charge into and out of that region, given by a continuity equation between charge density{\displaystyle
... Continue reading "Optics" »

Propagation of sound

Classified in Physics

Written at on English with a size of 2.57 KB.

sound: pessure waves produced when an object vibratesat a frequency between 20 Hz and 20000 Hz and there is a material medium that sound can travel through.

loudness: how loud or soft a sound is; loudness is related to the amount of energy that reaches our ears per unit of time.
pitch: how high or low a sound is; pitch is related to the frequency of the vibration that produces the sound.
timbre: quiality of a sound that makes it different to other sounds of the same pitch and loudness; timbre is related to the shape of the sound wave.
echo: reflection of sound from a surface that is more than 17 m away from the emitter.
reverberation: reflection of sound on a surface that is less than 17 m away from the emitter.
vibration: mechanical oscillation;
... Continue reading "Propagation of sound" »

Curing concrete in "carbonated water"

Classified in Physics

Written at on English with a size of 10.73 KB.

Shrinkage Reducing Admixture  “product or product residue may explosively Combust…” • Superplasticizer  Kills fish and ruins water – never pour down a Drain! • Colloidal Silver  “…known to cause birth defects…” • Silver Nitrate Solution  A poison, oxidizer, and corrosive!

Nitric acid + nitrobenzene = spontaneous explosion  We have separate storage for acids vs bases vs   Disposable safety gloves  One-time use  Remove and throw out when exiting lab • Neoprene gloves  For acids/bases  Wash outside fully before removing so next person Can use them safely • Lab coats  Protect skin from chemicals, broken glass, Abrasions  Protects your experiments from outside schmutz  According to Bruce
... Continue reading "Curing concrete in "carbonated water"" »

Edwardian literature

Classified in Physics

Written at on English with a size of 14 KB.

MODERNISM (1920-1935) -Fragmentation as a reaction against classical patterns, conventions and tradition.It started before WWI, but it wasn't until afterwards that it developed. -Anti-historicist, rejects sequential time (non-cronological), absolute polarities and the division between past and present (simultaneity). -Elitist: a certain level of knowledge is required to understand this movement. -Cultural despair: society expected changes after WWI, but this didn’t happen and they are in chaos and despair, afraid of the unknown (repetitive and nightmarish circumstances). -Moral relativism: each person judges what is moral or not, there is not any absolute value. -It portrays the impact of technology: a mechanical movement will establish a... Continue reading "Edwardian literature" »

"average velocity vector" speed "average speed" pdf acceleration

Classified in Physics

Written at on English with a size of 2.98 KB.

Biomechanics: Application of mechanical principles in the study of living organisms. Kinematics: appearance or description of motion, linear kinetics, angular kinematics. Kinetics: Forces that cause motion, linear kinetics, angular kinetics. Statics: mechanics of objects moving at constant velocity. Dynamics: mechanics of objects in accelerated motion(changing) Qualitative: non numeric description based on observ Quantative: numeric description based on data collected

Force: A push or pull applied, Effect that one body has on another, is a vector quantity wit magnitude and direction, and point of application. Produces motion Internal force:act within the object hold together when acted by external forces. External force: Act on an object as... Continue reading ""average velocity vector" speed "average speed" pdf acceleration" »

flipes

Classified in Physics

Written at on English with a size of 1.47 KB.

Steak Tartar: 1/start to make the sauce by putting the Salt, pepper, and French mustard into the soup plate 2/Add the lemon juice 3/ Combine the ingredients withe a service fork 4/Add a little olive oil 5/Add the Egg yolk and a little more olive oil. Mix well 6/Ensure that the emulsion is Achived 7/Add the dry ingredients and mix well 8/ Add the chopped steak and Fold in the sauce using a service spoon and fork. The sauce should be evenly Distributed trhough the steak. 9/ add a little brandy and mix well 10/Transfer To a cold joint plate and shape with two forks. 11/Garnish with onion rings and Chopped parsley, Anchovy fillets may be chopped and added with the dry Ingredients, or kept whole and used to garnish de finished dish.

Fraises Romanoff:

... Continue reading "flipes" »

Why is indifference curve generally curve to the point of origin

Classified in Physics

Written at on English with a size of 4.82 KB.

Example 2 Find parametric equations for a particle that starts at (0, 3, 0) and moves around a circle as shown
in Figure 17.1.
: Circle of radius 3 in the yz-plane, centered at origin
Solution Since the motion is in the yz-plane, we have x = 0 at all times t. Looking at the yz-plane from the
positive x-direction we see motion around a circle of radius 3 in the clockwise direction. Thus,
x = 0, y= 3cost, z = -3 sint.

Example 3 Describe in words the motion given parametrically by
x = cost, y = sint, z = t.
Solution The particles x- and y-coordinates give circular motion in the xy-plane, while the z-coordinate
increases steadily. Thus, the particle traces out a rising spiral, like a coiled spring. (See Figure 17.2.)
This curve is called a helix.

Figure 17.... Continue reading "Why is indifference curve generally curve to the point of origin" »

True Airspeed ()

Classified in Physics

Written at on English with a size of 3.04 KB.

Quoting: repeat another source word for word, using quotation marks.

Summarizing: to take ideas from a large passage of another source and condense them, using your own words.
Paraphrasing: use the ideas from another source but change the phrasing into your own words. 
in-text citation: Insert a short reference in brackets at the end of Each piece of borrowed information.
Reference ListPrepare a list describing the complete details of Your sources.
Funnel IntroductionBegins with a broad, general statement about the topic.Follows with narrower, more specific statements about the topic .Final sentence is thesis statement.

As Smith says, “I have always wanted to travel and now My dream has come true” (1998, p.6)  
As Smith (1998) says,
... Continue reading "True Airspeed ()" »

INGLESITUEÑOS

Classified in Physics

Written at on English with a size of 3.27 KB.

1 IN 4 SPANISH TEENS CYBER-BULLIED THIS YEAR

A. It means To treat somebody in a unfair and cruel way using new technologies. T (7.8) T(11.12) F(12) c

2. Why does A person bully others?/Certain Boys had cyber-bullied her a lot the previous year at school / Three Youngsters who had committed criminal offences were arrested by the police /They knew Them.

3. University. Team. Roughly. Researchers. Repercussions.

TRAVEL TOURISM AND FICTION

Because it Is the most rainy town in America And the clouds don’t let the vampires see the sun. T(4.5) F(6.7) F(14.15)  a

2. How long Does it take to solve the case?/At the end Of the case, a virtual Grissom would announce whether we were right or not. -- =/Stephanie Meyer had chosen another place for her novels.... Continue reading "INGLESITUEÑOS" »

Air law

Classified in Physics

Written at on English with a size of 2.08 KB.

light is a form of electromagnetic energy. Photons move in a wave pattern.Visible ligth is which allows you to see the colours and shapes of the objects. Can come from natural o artificial source. Can be transparent, translucent or opaque. Depens how the light travels through them. The speed of light depend on the medium. The speed in a vacuum and in the air is similar:300,000km/s. Incident ray hits the surface. Reflected ray bounces off the surface. Light is refracted when it passes from one medium to another medium with a different density. Water is denser than air. Coverging lenses. Thiker at the centre than at the edges. Concentrate rays of light. Diverging lenses thiker at the edges than at the centre. Disperse the rays of light. Red has
... Continue reading "Air law" »