Friday, 29 August 2014

Some MCQs of Physics and Chemistry.

Q1)when the aircraft concorde is moving in horizontal plane at const speed 650 m/s its turning circle has radius of 80 km wat is ratio of centripetal force to the weight of air craft?
Ans.


Q2)when 0.24 gm of magnesium is reacted with excess HCl what volume of gas librated at RTP
Ans.




Q3)In mixture of NO and CO2 initialy containing 4 mol of NO and 0.9 mol of CO2 reaction ocur acording to NO+CO2>NO2+CO at eq 0.1 mol of CO2 was presnt what is Kc
Ans.


Q4)a box of mas m =6 kg slid with speed v=4 m/s acros frictionless flor it sudenly explodes into 2 pieces one piece with mass m1 =2kg moves in same direction with speed v1=8 m/s find velocity of 2nd piece
Ans. as momentum before collision= momentum after collision
for m2 ,m=m1+m2 6=2+m2 m2=4kg so 6(4)=2(8)+4(x) 8=4x x=2m/s


Q5)Q2) on groud the gravitational force on satelite is W wat is gravitational force on satelite when at height R/50 where R is radius of earth
Ans. On the ground, the distance (from the centre of the Earth) is R. In orbit, the distance is R+R/50 or (51/50)R. The force is (ETA: inversely) proportional to the square of the distance so the multiplier you want is (50/51)^2 ~=0.96W

Q6)equal weights of methane and hydrogen are mixed in an an empty container at 25 degre centegrad the fraction of total presure exerted by hydrogen is.
Ans. apply mole fraction formula by daltons law of partial pressure
as moles fraction=no of moles of components/no of total moles let no of moles H2= n/2 let no of moles of CH4=n/16 total moles = n/2 + n/16 =9n/16 so mole fraction of pressure exerted byH2= n/2 ÷ 9n/16 = n/2 × 16/9n =8/9 ans


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Monday, 18 August 2014

#Biology

The wing act as aerofoils when birds
Glide   Fly
Walk        Hop
Answer: Option A Glide
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Sunday, 17 August 2014

Psychiatry or Psychology



Psychology:-
                         The scientific study of the human mind and its functions, especially those affecting behaviour in a given context.
synonyms:-study of the mind, science of the mind, science of the personality, study of the mental processes
                    "she has a degree in psychology"
Psychiatry:-
              The study and treatment of mental illness, emotional disturbance, and abnormal behavior.
What's the difference between a psychologist and a psychiatrist?
        The short answer is, psychiatrists are medical doctors and psychologists are not. The suffix "-iatry" means "medical treatment," and "-logy" means "science" or "theory." So psychiatry is the medical treatment of the psyche, and psychology is the science of the psyche.
Their Credentials
Psychiatrists begin their careers in medical school. After earning their MD, they go on to four years of residency training in mental health, typically at a hospital's psychiatric department. After completing their residency, these physicians can be licensed to practice psychiatry. In order to become a Psychiatrist one must first study complete MBBS and then take a specialization in that stream.
Psychologists go through five to seven years of academic graduate study, culminating in a doctorate degree. They may hold a PhD or a PsyD. Those who are mainly interested in clinical psychology -- treating patients as opposed to focusing on research -- may pursue a PsyD.Licensing requirements for psychologists vary from state to state, but at least a one- or two-year internship is required to apply for a license to practice psychology.

Prescribing Powers

As medical doctors, psychiatrists can do what most psychologists cannot: They can even prescribe drugs.But a psychologist has no power to prescribe drugs.
Key differentiators between Psychology and Psychiatry:-
There are many differences between Psychology and Psychiatry. One of the first dissimilarity would be the varied nomenclature. Psychiatrists and Psychologists over and over again treat the same issues, in different ways. Psychotherapy techniques facilitate both fields to work on the research side and the practicing side. Psychiatrists are basically doctors with certification of MD or DO. On the other hand a Psychologist is less medically oriented and more scientifically rooted. Even though Psychology and Psychiatry can handle similar patients and caseloads, there is difference in their philosophy. One main difference is that a Psychologist does not have the power to prescribe medication to their patients, as long as there is no consultation with and approved licensed Psychiatrist. A Psychiatrist usually treats illnesses through medicines and less on psychotherapy, and a Psychologists way opposite, since most cannot prescribe medication.
Future :-
Both a psychologist and a psychiatrist are Doctors, however, someone practice psychology has earned a doctorate degree that is either a PhD or a PsyD, whereas someone practicing psychiatry is a medical doctor. Both career choices require several years of commitment to studies and both are rewarding careers that offer a variety of subfields in which you can practice. The career outlook for both positions have been and will continue to be good career options. The salaries vary depending on the field of psychiatry and/or psychology you choose to specialize in, however, a psychiatrist typically earns a larger yearly income than a psychologist due to the medical degree.
Scope :-
Psychology :- Psychology future in Pakistan is very good and there are many options available for psychologists in Pakistan. Students with Masters in Psychology are usually employed, depending upon their specialization, by multinationals, health and education sectors. In multinationals they are employed in research, human resources and training. In health sector they are employed as clinical psychologist, psychometrician, addiction and family counsellor and education sector  employed them as school psychologist, guidance counsellor and teacher. Beside that many students opt for teaching profession (psychology) in public and private institutions.
 
Psychiatrist :-As psychiatrist has also better scope in Pakistan as well as better salary .
          
Remember your decision for getting into psychology field should not be based only on job prospects, rather it should be based on your interest and passion. Technological advancement rapidly changing the nature and scope of occupations. Therefore don't expect that you'll end up only in the above mentioned sectors/options. There will be many more occupational options available to you by the time you'll finish your school.
Moral:-                     I think you guys get it .If you don’t understand it then I think so you need a Psychiatrist/ Psychologist.

#Physics

The highest value of escaped velocity in solar system is for planet
Earth            Neptune
Jupiter      Moon
Answer: Option C Jupiter
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#Physics

There are three blubs of 60W,100W and 200W which bulb has thickest filament
100W   200W
60W All
Answer: Option C 60W
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