Questions asked by Rabik J.

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• How to convert rev/s into rad/sec?
  
• 7rad /sec, how will we convert it into rev/sec?
  
• The moment of inertia of a sphere of 100kg mass and a diameter of 100cm is?
  
• Why the formula for calculating moment of inertia is same for hoop and disc?
  
• The weight of a man in an elevator moving up with an acceleration equal to 3g is?
  
• How to convert 80kgm2sec-1into j-min?
  
• Do centripetal and centrifugal forces are produced by friction?
  
• If mass of a planet is greater than the its G Will be greater?
  
• Do the value of g increases at equator?
  
• The weight machine measures appearent or real weight?
  
• What is the angle between angular acceleration and radius vector?
  
• Linear velocity and angular acceleration are parallel or perpendicular to each other?
  
• Poisuille is sI unit of viscosity ? And one pois e is equal to ?
  
• What happens on increasing the temperature of an endothermic reaction according to le chatlier principle?
  
• In torricellis law the pressure on the surface of fluid and on the opening is same or different and the velocity at top and from hole is same or different?
  
• The velocity of a freely falling body increases or decreases with time?
  
• Do kc have any unit?
  
• Can we write an equilibrium constant expression for table salt sucrose fructose and solution of petrol in kerosene?
  
• A body of frequency “f” would complete one vibration in a)f seconds b)1/f sec c) 1sec ?
  
• Can any substance has zero ph?
  
• As time period doesnot depend on amplitude so then why it is said that in measurement of time period amplitude must be kept small and also that amplitude must be zero ?
  
• Distance covered by an oscillating body in terms of amplitude is a) A b) 2A c) 3A?
  
• Do large damping force on a body means large change in amplitude why?
  
• If the length of a seconds pendulum is L then length of the pendulum having a period of one second is?
  
• As displacement is zero at mean position so can amplitude be zero at mean position ?
  
• Time period of a simple pendulum is 2sec if length is increased four times then its period becomes?
  
• The rate of reaction depends only on the concentration of reactants or also on products?
  
• Rate of consumption of dinitrogenpentoxide is 0.5mol per litre per sec rate of formation of NO2 is ??
  
• Catalyst can change the enthalpy of the reactants?
  
• If the difference between the frequencies of two tuning forks is n number of beats produced in two seconds are a)n b)2n c) 3n ?
  
• A tuning fork of frequency 256 hz produces three beats per second with another tuning fork b the frequency of tuning fork b is?
  
• I have heard that speed of sound does not change with change in pressure so why according to formula v equals square root of pressure by density; v is directly proportional to square root of pressure?
  
• Which of the following properties of EM waves does not change in vacuum a)speed b)wavelength c)frequency d)all of these?
  
• Two waves are having a constant phase difference does it means the two waves can be out of phase 180 with respect to one another ?
  
• Sound waves and light waves are two dimensional or three dimensional?
  
• In physics we have studied that work done is independent of the path followed by the body, but in thermodynamics it is said work is path dependent why is this so?
  
• In galvanic cell why anode is negative and cathode is positive?
  
• It is desired to increase the volume of a given weight of co2 at40degrees to three times original volume at constant pressure the temperature should be raised a) 333b) 120c) 666 degrees?
  
• In an isobaric process pressure is constant ;means piston is fixed ,so then how, work is done?
  
• A refrigerator has coefficient of performance 8 if the temperature in freezer is -23 degrees,what is the temperature at which it rejects heat?
  
• The speed of blood in capillaries is 1mm/min how will it be converted into m /sec?
  
• Antibodies are included in second line of defense or in third line of defense(the complement proteins are antibodies) or not?
  
• The #"pH"# of a #"0.08 mol dm"^(-3)# solution of #"HClO"# is equal to #2.85#. Calculate the ionization constant of the acid?
  
• If the area of plates is tripled and medium of relative permitivity 2 is introduced between plates then capacitance of capacitor isa)increases by 500 percent b)decreases by 500 percent c) increases by 600 percent?
  
• Electric flux depends on the medium or not ?What is the relation of flux with vacuum permitivity according to gauss,s law?
  
• Halogens in un combined state exist as diatomic molecules ,but they these discrete molecules have vander waal forces, why?
  
• The energy given out by a 60watt bulb in 30 minutes is a)900joule b)30watt hour c)1108000j?
  
• Two dissimilar metals joined at their ends kept at constant temperature constitute ,a thermocouple ?is it true?
  
• If current is decreased then drift velocity decreases?
  
• Conventional current flows in the direction of applied field or against the field ?Do conventional current means proton flow?
  
• A vertical solenoid has 200 turns in a length of 0.4m and carries a current of 3A in anticlock wise direction.the flux density in the middle is about ?
  
• Inorganic compounds can show isomerism or not?
  
• Is there any involvement of brain in reflex action or they are only controlled by spinal cord?
  
• Chloroform is a hydrocarbon or not?
  
• The voltage of primary and secondary coil of transformer is same?And current is same or not?
  
• In an RC circuit the value of R is double the value of #X_c#, the phase angle is then a) 30 degrees b) 45 degrees c)60 degrees?
  
• What is the structure of secondary butylchloride?
  
• As halogens are salt formers ,so can we say alkylhalides are salts?
  
• If capacitance of capacitor in ac circuit is increased 3times its initial value then capacitive reactance will decrease or increase and how many times?
  
• Is there any difference in C-F and R-F bond ?or they are same?
  
• Is it necessary to use lithium aluminum hydride in reduction of nascent hydrogen?
  
• A hydraulic press contains 0.25#"m"^3# of oil of bulk modulus 50000000pa the change in volume of oil when subjected to increase pressure of 60000000pa is?
  
• Do polycrystalline solids have short range order?
  
• Is it necessary to have oh group of phenol valways at ortho or para position ?Can oh group be at metaposition in "phenol"?
  
• When grignard reagent react with ethanol which product is formed?
  
• Magnetizing force is produced in a ferromagnetic material due to current ?
  
• Pair of genes(allele) are present on only one chromosome or on homologous chromosomes?
  
• Does the set of chromosome in a diploid means; every cell of its body (except germ cell )contains 46 chromosomes?In case of humans?
  
• The diode that converts light energy into electrical energy is called photodiode or solar cell?
  
• Are linked genes the ones that are linked with genes on the same chromosome or with genes on the homologous chromosome?
  
• Genes for milk yield in dairy cattle is due to autosomal gene or sex linked gene?
  
• What will be the product of oxidation of 2butene?
  
• As some aminoacids have more than one codon so for production of an aminoacids all of its codons are necessary or any one of them can encode individually for that aminoacid?
  
• One pyruvic acid produces how many ATP?
  
• Why the energy difference between first and second orbit of hydrogen is less as compared to these orbits of uranium atom?
  
• Those animals that feed on different tropic levels (grizzly bear that eat both berries and salmon )are classified at which trophic level?
  
• A medical lab has 16gram of sample of radioactive isotope after 6hours it found that 12gm of sample have decayed the half life of isotope is?
  
• A radioactive element has a half life of 6 minutes if initial count rate is 824per minute the time taken by it to reach a count rate of 206 per minute is a) 20min b) 15min c) 12min?
  
• A 96gram of sample of radioactive nuclide is placed in a container after 12min only 6gm of sample is undecayed .what is the half life of radioactive nuclide a)8hr b) 6hr c) 3hr?
  
• Amass difference of 0.0012u is equivalent to energy of?
  
• Half life of iodine -131is 8days and its weight is 20mg After 4half lives the amount left undecayed will be?
  
• Why in beta decay there is an increase and decrease in atimic number by release of electron or positron What causes the change?
  
• When we introduce a "single "transgene in the body then can this one gene can replace the function of the defected gene ,as this defected gene might be present in all body cells?
  
• If 9.8ml of sulphuric acid is dissolved in 1dm3 of solution then what is the molarity of the solution?
  
• The melting of ice at body temperature is an endothermic procesd thus eating ice counteracts exothermic metabolic reaction how much ice would you eat to counteract the heat produced by eating 28.3g of peanuts a)78g b) 1100grams?
  
• The process in which Charles law is applicable is called a)isobaric b)isochoric c)isothermal process?
  
• Sound waves are two dimensional or three dimensional?
  
• The speed of sound in air at 27degress is 340m/s.The speed of sound at temperature of 927degress is?
  
• A body of mass 5kg is moving with a momentum of 10kgms-1.A force of 0.2N acts on it in direction of motion of body for 10sec.The increase in kinetic energy is?
  
• Two forces of magnitude 10and3n are acting at an angle other than zero which of yhe following cannot be their possible suma) 13 N b) 9N c)7N d)12N?
  
• Three grams of C-12 will posses how many atoms?
  
• What is the difference uniform and constant velocity ?Is acceleration zero in case of both constant and uniform velocity?
  
• Is it true that constant velocity means zero acceleration but constant acceleration does not mean zero velocity?
  
• What is the unit of charles law constant k?What is the affect of number of moles and pressure on value of k?
  
• What are the units of equilibrium constants kc, kp kn and kx?
  
• A 90v charge is applied acrosd 10ohm and 20ohm resistor in series what would be the current in 20ohm resistor?
  
• The rotational inertia of a disk about its axis is 0.70kgm2. When a 2kg mass is added to its rim ,0.40m what will be its rotational inertia?
  
• Damping is a phenomenon of free oscillation or also of forced oscillation?