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Physical Exercises

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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

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" »


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(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, 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" »


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45.How long was Adrian in bed and why did he finally get up? he was in bed 10 days and he finally got up because his grandma told him to get up and shave because he need to wash his sheets. 46.How well did Adrian keep his new year´s resolution...? he only got his father and mother together the other 3 resolutions weren't carried out. 43.How did the vicar´s wife help Adrian? the vicar´s wife helped Adrian lending him her bed and calling his parents, asking them to pick him up. 10.In what way is Courtney Elliot...? Courtney Elliot isn't an ordinary postman because he wears a smart shirt, a red bow tie with his grey uniform. It seems he was an university professor who didn't like academic life and he inmediately made friends with the dogs.... Continue reading "Biologia" »

Archimedes' Principle

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1. THEORY. Archimedes' Principle

In our daily life we ​​can make observations such as:

1. When we dive into a swimming pool or the sea appears that we are lighter, say you weigh less.

2. The balloons that are sold for children up in the air when released.

3. A piece of iron does not float, in general, on water, but if we give it the right way, consider a boat, we see that fleet.

The scientific explanation of these facts found many centuries ago, fourth century BC, a person of outstanding ability, ARCHIMEDES.

Fluids exert buoyancy forces on objects located within it. The nature and value of these forces are determined by the Principle of Archimedes:

"A body immersed in a fluid (liquid or gas), experiences a force (thrust) and upward vertical

... Continue reading "Archimedes' Principle" »

Equations of maxwell

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1st. Maxwell Equation. Gauss Law

Describes the relation between electric fields and electric charges. Maxwell modified it mathematically for modeling it in a differential form.

2nd. Maxwell Equation. Gauss Law for magnetic field.

Just as Gauss’s Law for electric fields, this describes the relation between a magnetic field and its source, the difference being that magnetic fields do not end and start on a charge.

3rd. Maxwell Equation. Faraday Law

A variable magnetic field induces an electric field.

4th. Maxwell Equation. Ampere Law

An electric current or variable electric field produces a magnetic field. Maxwell came to this law based on Faraday’s Law and the symmetry of nature.

Postulate 1 
The laws of physics are the same for all referential
... Continue reading "Equations of maxwell" »


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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" »

Final exam physics

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-Acceleration is defined as the CHANGE in... Velocity divided by the time interval.
-Its more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity, because.. m
s > mk
-The number of complete vibrations per second is the… Frequency
-According to Pascal's principle, any change on a confined fluid… Is transmitted unchanged throughout the fluid.
- Turning up the flame under a pan of boiling water causes... The water to boil away faster.
- A negative ion has... More electrons than protons.
- The force of attraction or repulsion between two charged particles is... None of the options.
- A volt is a unit of electrical... Potential
- When resistors are connected in parallel with each other, we can be
... Continue reading "Final exam physics" »


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Clinical characteristics of polymyositis
Myopathic weakness
Evolves over weeks to months, spares facial and eye
muscles, and presents as difficulty in climbing steps, rising
from a chair, lifting objects, combing hair.
Disease onset
Above the age of 18 years
Features the patient DOES NOT have
Rash (characteristic of dermatomyositis)
Family history of neuromuscular diseases
Exposure to myotoxic drugs, especially penicillamine,
and (rarely) statins28, 29
Endocrine disease (hypothyroidism, hyperthyroidism,
hypoparathyroidism, hypercortisolism)
Neurogenic disease (excluded by electromyography and
neurological examination)
Dystrophies and metabolic myopathies (excluded by history
and muscle biopsy)
... Continue reading "Polymyositis" »


Classified in Physics

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paris is the most beatifull city in is famous farits well-known monuments suchs as: the Eiffel tower,notre dame les bois de Boulogne,les tuileries.A famous river called the Seine goes across the whole city by the boat calle“le bateau Couch”.where you can ad mire the landscape of the whole city and Rajoy the famous Franch and delicios food.if you are keen on visiting museum you cant go to the must famous museum in the wold called the “Louvre”.to sum up, paris is a amazing city.
47.calle;bcn;19june10-gym..cale.lh-dear Sirs,
I would like to receive information about your gym, so I can become a member of your club gym because it has the best installation.
I would like you to give me some information abaut schedules, activities,
... Continue reading "Dg" »


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  Angela Carter (7 May 1940 – 16 February 1992) was an English novelist and journalist, known for her feminist, magical realism, and picaresque works

After dying of cancer, aged 51, in 1922, Angela Carter was pronounced by The Times one of the 50 best postwar British writers. Her work is regarded as fantastic or magical realism, it is accompanied by her naturalistic and realistic critic of female and thus male gender. Her style of writing is very diverse. She wrote nine novels and although most of them are relatively short, they are crammed with an extraordinary range of ideas themes and images. Some of them are: Shadow Dance, The Magic Tayshop. Love, etc.  She wrote three pieces of nonfiction and several collections of short stories including... Continue reading "Britain" »