Notes, abstracts, papers, exams and problems of Physics

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Physical Exercises

Classified in Physics

Written at February 13, 2009 on English with a size of 10.56 KB.

Six 19.4 moles of ideal gas are in a cylinder fitted at one end with a movable piston. The initial gas temperature is 27.0 ° C and the pressure is constant. As part of a proposed machine design, calculate the final temperature of the gas once it has made 1.75x10 ³ J of work.
n = 6 moles isobaric process
T? = 27 ° C
P = CTE.
W = 1.75 * 10 ³ J
PV = nRT
V? = Vf =

W = P (-)

Pf = P: = P

W = (nRTf - nRT?)

W + nRT? = NRTf

Tf =

Tf =
Tf = 335.24K

19.8 Work done in a cyclic process. a) In Figure 19.8a, consider the closed loop 1 3 2 4 1. This is a cyclical process in which the initial and final states are the same. Calculate the total work done by the system in this process and show that equals the area enclosed by the cycle. b) What... Continue reading "Physical Exercises" »

Asasd

Classified in Physics

Written at September 3, 2009 on English with a size of 4.9 KB.

(M02)Lunar embasy 1a)F. But...a rocket b)So far...apiece 3a)views b)roaring c)prohibited d)grateful 4a)have bought/but b)signed/with Smile you are camera(M03) 1a)T.And as...growing b)F.If the program...department 3a)implement b)radio c)high d)argue 4a)were/that b)had/what A relative difference (M04) 1a) F."This similarity...chimpanzees"b)F."development and...that now" 3a)link b)skull c)leap forward d)seemingly 4a)If you don´t ask him a question,he won´t speak to you. I´m working from home(M05)1a)F"For the Spanish...reason b)T"Overall,fewer...to do" 3a)choosing b)survey c)opportunity d)switch 4a)have worked/per b)to get/to. Should the State tell...drink?(M06) 1a)F"We eat on...else"b)F"A sociologist...dining table" 3a)enquiry b)almost c)entire... Continue reading "Asasd" »

Sdeasd

Classified in Physics

Written at November 22, 2009 on English with a size of 22.38 KB.

Mamíferos: Las hembras tienen mamas que producen leche para alimentar a las crías, el cuerpo está cubierto por pelos. La función principal es proteger del frio al animal.
Pelaje: raíz dentro del funículo piloso .Los pelos nuevos sacan los pelos viejos. La glándula sebácea lo hace más flexible el pelo. Lana (largo y fino), cerda (áspero y grueso), vello (suave y corto) y púa (largo y puntiagudo)
La temperatura: Es constante. Si sube o baja la temperatura siempre se mantiene constante.
Hibernación: desciende -10 Cº / Duerme no come y se esconde.
Invernación: baja la temperatura pero un duerme profundamente, come y hace algunas actividades.
La fecundación interna se produce en el ovulo con el esperma.
Sistema digestivo: Boca -faringe-

... Continue reading "Sdeasd" »

Fyq

Classified in Physics

Written at June 1, 2009 on English with a size of 1.56 KB.

valencias:(H,F=1);(CL,BR,I=1357);(O=-2);(S,Se,Te=246);(N=12345);(P=135);(A,Sb,Bi=35);(B=3);(C=24);(Si=4);(Li,Na,K,Rb,Cs,Fr,Ag=1);(Be,Mg,Ca,Sr,Ba,Ra,Zn,Cd=2);(Cu,Hg=12);(Al=3);(Au=13);(Fe,Co,Ni=23);(Sn,Pb,Pt,Ir=24)(Cr=23456);(Mn=23456)

Hidruros volatiles:NH₃=amoniaco;N₂H₄=hidrazina;PH₃=fosfina;P₂H₄=difosfina;AsH₃=arsina;As₂H₄=diarsina;SbH₃=estibina;CH₄=silano;Si₂H₆=disilano;BH₃=borano;B₂H₆=diborano.

Understanding Energy and Electricity: A Comprehensive Guide

Classified in Physics

Written at December 11, 2023 on English with a size of 2.05 KB.

By: accident, chance, hand, heart, law, mistake, no means, request, virtue of, in a good mood, private, return, time, brief, danger, difficulty, doubt, a hurry, a mess. On: purpose, a regular basis, schedule, strike, time (a tiempo), average, balance, condition, fire. At: a price, one time, risk, the age of, all cost, a glance, least. Of: member, remind, at a rate, a cause, approval, experience, get rid, habit. With: link, regret, sympathize, arguments, contact, concern, dealing, difficulty. To: explain, reply, access, addiction, belong, change, damage. For: life, once, real, a while, a reason, demand, hire. From: time to time, now on, memory, experience. Out: of place, of stock, of sight. Conductance: the amount of power - Conductivity: The... Continue reading "Understanding Energy and Electricity: A Comprehensive Guide" »

A body is placed in a certain airstream

Classified in Physics

Written at June 23, 2023 on English with a size of 1.07 KB.

FORCE:

.Any cause with the ability to: modify the state of a

body ( motion vs rest) and deform a body

1.1 Its effects produced depends on: the intensity,

the point where the force is applied and the

direction and sense

INERTIA:

.It's the property of the matter to tend to remain

on its state of motion or rest. If a body is resting, it

will continue so eternally unless a force is applied.

EQUILIBRIUM ALTERATION:

Different forces manage bodies to achieve or lose

equilibrium. Equilibrium types: stable: a slight

disturbance generates a restoring force to return to

equilibrium. Unstable: a slight disturbance leads to an

increasing departure from the equilibrium. Neutral: A

disturbance simply moves the object to a new position.

Time of useful consciousness

Classified in Physics

Written at May 17, 2023 on English with a size of 1.54 KB.

annihilate:to destroy completely

expandable:not worth keeping not essential

infinitesimallyi:in amounts so small as to be barely measurable

correlate:to figure out or create a relationship between two items or events

paradox :statement or an event that sounds impossible but seems to be true

resilient:strong but flexible able to withstand stress without injury

undulate:to move in waves or in a smooth wavelike motion

malfunctioning:not working or operating properly malfunction

stagnating:becoming foul or rotten from lack of movement stagnate

subliminal:below the level of consciousness

autor: Ray Bradbury /travis kill eckels /time safari , INC.

The beginnings of english: old and middle english 600-1485 setting the scene the first literature

Classified in Physics

Written at April 17, 2020 on English with a size of 5.88 KB.

Tema 2

TEMA 2.High middle ages(1001-1300) and late m.A(1300-1485).Ongoing Expansion of islamic faith.Anglo-Sxon england invaded by William ,duke of Normandy.They Took literal possessions.Anglosazon=>Norman->Feudalism.Feudalism:complez social organisation based on functions and jiearchies. Functions: Oratores,bellatores,laboratores.Hierarchical: form superior to inferior According to essential degree.Defining features of the english medieval Period:-Resistance to monarcha´s feudal power.-Instability of political Power.-Pope´s authority also contested(Thomas becket´s murder in Canterbury)-Origin of some genuine institutions(oxford university, cambridge...)-Population Increase+developement of cities as centres of production and Commerce-

... Continue reading "The beginnings of english: old and middle english 600-1485 setting the scene the first literature" »

Characteristics of new pragmatism mixed focus

Classified in Physics

Written at August 29, 2023 on English with a size of 2.3 KB.

Gesture and thinking for speaking (TFS). Slobin proposed

that in the activity of speaking, thinking takes on a particular

quality as experiences are filtered through languages into

verbalized events. He suggested that TFS might not merely

influence how people talk about events, but how they

experience those events. He called this the anticipatory

effects of language, which arise during experience time.

It is during speaking time TFS comes into play,

Thinking for speaking is a particularly compelling area of L2

research with regard to L2 meaning and self-regulation.

McNeill’s research, which links TFS features to gestures, show

that the dialectical interaction between speaking and gesturing

in the GP brings out some semiotic effects that don’t appear

immediately

... Continue reading "Characteristics of new pragmatism mixed focus" »

The Road Not Taken

Classified in Physics

Written at September 6, 2023 on English with a size of 1.11 KB.

Robert Frost - 1874-1963

Two roads diverged in a yellow wood. And sorry I could not travel both, And be one traveler, long I stood, and looked down one as far as I could, to where it bent in the undergrowth.

I took the other, as just as fair, and having perhaps the better claim, because it was grassy and wanted wear, though as for that the passing there, had worn them really about the same.

And both that morning equally lay, in leaves no step had trodden black, oh I kept the first for another day, yet knowing how way leads on to way, I doubted if I should ever come back.

I shall be telling this with a sigh, somewhere ages and ages hence, two roads diverged in a wood, and I, I took the one less traveled by, and that has made all the difference.