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MCAT Physics Mcq Questions Heat and Thermodyanimcs

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1. The particles in the wave separated through __________ multiple of ? are out of phase to each other




2. Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are




3. Newton estimated the speed of sound




4. Laplace found that the alternate compressions and rarefactions produced in sound waves follows




5. For destructive interference of sound waves the path difference between two interfering sounds should be




6. The speed of sound in hydrogen is __________ time than that in oxygen




7. The beats frequency (sensible) for a human car is




8. The speed of stationary waves in a stretched string are independent of




9. Fundamental frequency of stationary waves in open pipe is ________ times the frequency in closed pipe.




10. Which phenomena can be applied to estimate the velocity of star with respect to earth




11. Dimension of pressure is




12. Temperature is a property which determines




13. We prefer mercury as a thermometric substance because




14. The scales of temperature are based on two fixed points which are




15. Numerical value of Boltzmanns constant is




16. In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because




17. Normal human body temperature 98.6?F corresponds to




18. The Fahrenheit and centigrade scales agree to




19. The size of one degree of Celsius is equal to




20. At constant temperature the graph between V and 1/P is




21. According to Pascals law the pressure of gas in a vessel is




22. We can produce heat by




23. Which one is true for internal energy?




24. Metabolism is the name of a process in which energy transformation takes place within




25. Which one is not an example of adiabatic process ?




26. The pressure exerted by a column of mercury 76cm high and at 0?C is called




27. Standard condition STP refer to a gas at




28. If the volume of a gas is held constant and we increase its temperature then




29. If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of




30. Boyles law helds for ideal gases in




31. Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their




32. Which one of correct relation ?




33. The reading on the Fahrenheit scale will be double the reading on the centigrade scale when the temperature on the centigrade scale is




34. The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine




35. For a gas obeying Boyles law if the pressure is doubled the volume becomes




36. Triple point of water is




37. Which of the following properties of molecules of a gas is same for all gases at particular temperature?




38. Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as




39. Average translational kinetic energy per molecule of an ideal gas is given by




40. In which process entropy remains constant




41. Adiabatic process is also called




42. Which quantity is a state function




43. The value of ? for diatomic gas is




44. The work done in the isochoric process is




45. In which process all the heat supplied is converted into work done.




46. For the successful operation of Heat engine which condition should be met.




47. The performance of a refrigerator is described by




48. The purpose of flywheel in the engines is




49. The unit of entropy is




50. Petrol engine is a