PHY 103 EXAM CBT TEST

1. The SI unit of Surface tension is ______

2. 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

3. Mercury melts at ________

4. 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

5.

6. Gas molecules obeys Newton law

7. 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. 

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

9. 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

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

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

12. For an isolated system

13.

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

15.

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?

16. 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 

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

18.

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

20.

21. _______ materials can easily be broken or cracked

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

23. Pyrometer is best used to measure

24. Which of the following affects surface tension

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

26. Compressible flow is a flow that deals with ______

27. 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? 

28. The scale of 212°F in °C is ___

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

30. What is the dimension of strain

31. For an isolated system

32. Which of the laws of thermodynamics defines entropy 

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

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

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

36. Which of the following is true?

37. First law of thermodynamics deals with

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

39. Which of the laws of thermodynamics defines entropy

40. Water strider can walk walk on water because