PHY 103 EXAM CBT TEST

1. Which of the following affects surface tension

2.

3. Which among the following is an assumption of Hagen-Poiseuille equation?

4. Water strider can walk walk on water because 

5. An object has a mass of 10kg and a length of 4m, given that the cross-sectional area of the object is 32.5m^2, Now calculate the density of the object

6. Mercury melts at ________

7. A uniform cylindrical wooden block floats in water with 1/3 of its height above the water level. In a liquid of a relative density 0.8, what fraction of its height will be above the liquid 

8. A body weighs 0.3N in air, 0.25N when fully immersed in water and 0.27N when fully immersed in a liquid. Calculate its loss of weight in water

9. __________ is the condition of a system at an instant of time.

10.

11. Which of the following is not a scale used in measuring temperature?

12. __________ is a pointer for the direction of energy transfer. 

13. The pressure at any given point of a non-moving fluid is called the ____________

14. Compressible flow is a flow that deals with ______

15. Bulk Modulus, Pressure, Force, Stress – Which one of these won't have the same unit as the others?

16. First law of thermodynamics deals with

17. Which of the laws of thermodynamics defines entropy

18. ________ Law states that provided the elastic limit of an elastic material is not exceeded, the force applied is directly proportional to the extension

19. For an isolated system

20. A deuterium nuclei fusion reaction will occur provided that the nuclei possesses an average kinetic energy of at least 0.72Mev what is the temperature required for nuclear fusion to take place in the deuterium? 

21.

22. Which of the following is not a basic type of stress

23. Which of the following is true?

24. Which among the following is the formula for Gibbs free energy?

25. What is the dimension of strain

26. Hooke's law is applicable within what limit?

27. For an isolated system

28. Gas molecules obeys Newton law

29. The SI unit of Surface tension is ______

30. _______ is the part of the universe, we choose to study 

31. ________ is the evidence that matter is made up of atoms and particles that are in constant vibration 

32. A student using a circular loop of wire and a pan of soapy water produces a bubble whose radius is 1mm. The surface tension of the soapy water is [a= 0.025N/m] determine the pressure difference between the inside and outside of the pan. 

33. __________ is a pointer for the direction of energy transfer. 

34. Which of the laws of thermodynamics defines entropy 

35. A hydraulic press contains 0.25m^3 of oil find the decrease in the volume of the oil when it's subjected to a pressure increase (P' - P) = 1.6 x  10 ^7 Pa. The bulk Modulus of the oil is 5.0GigaPa

36. The scale of 212°F in °C is ___

37. Pyrometer is best used to measure

38. _______ materials can easily be broken or cracked

39.

A cubic tank is completely filled with water. What will be the ratio of the hydrostatic force exerted on the base and on any one of the vertical sides?

40.