PHY101

1. An electric kettle contains 1.5 kg of water at $$100 ^{o}$$ and powered by a 2.0 kW electric element. If the thermostat of the kettle fails to operate, approximately how long will it take for the kettle boil dry? (Take the specific latent heat of vaporization of water as $2000kJkg^{-1}) $

2. The frictional force in fluids is known as ___________

3. A piece of stone has mass 80kg and density of 0.10 kg per meter cube. What is its volume in meter cube?

4. Which of the following is NOT a thermometric property?

5. When a gas is allowed to expand at constant _____the process is described as isothermal.

6. The ____ of the instantaneous centre of a moving rigid body is called centroid.

7. What is common to the variation in the range and the height of a projectile?

8.  Tin melts at 232 under standard atmospheric pressure. Express this temperature in kelvin

9. When an object is in thermal equilibrium, it is losing and gaining heat at ____ rates.

10.  The amount of heat stored in a substance depends on all of the following EXCEPT _______

11. When the junctions of two dissimilar metals are maintained at different temperatures an electromotive force is is set up in the circuit of which these junctions are a part. A pair of junctions of this kind is known as _____________

12. When trying to turn a key into a lock, ____ of forces are applied.

13. Radius of _________ is the radial distance from any given axis at which the mass of a body is concentrated without changing the moment of inertia of the body about that axis.

14. How fast must a ball be rolled along the surface of a 70-cm high table so that when it rolls off the edge it will strike the floor at the same distance (70cm) from the point directly below the edge of the table?

15.  The molecules of a liquid are held together by what type of forces?

16. An object is shot from the ground at 75m/s at an angle of 45 degrees above the horizontal. How high does the object get before beginning its descent?

17. The velocity of a particle moving with simple harmonic motion is ____ at the mean position.

18. The _____of oscillations of a particle in simple harmonic motion is damped by resistive forces due to the surrounding medium.

19. Calculate the root-mean-square velocity of oxygen molecules at room temperature, 25 oC. Given that molar mass of oxygen and molar gas constant are 31.9998 g/mol and 8.3143 J/mol K, respectively in meter per second.

20.  A stone thrown from ground level returns to the same level 4 s after. With what speed was the stone thrown? Take $g = 10ms^{-2}$

21. Which of the following physical concepts best explains why passengers in fast moving cars should always fasten their seat-belts?

22. The method of mixtures as a means of measuring the amount of heat of a substance depends of the principle of conservation of ______

23. FBQ25: A ________ is the turning effect caused by a couple.

24. Which of the following does NOT refer to the terms description of stability of on an object?

25.  Which of the following is NOT true?

26. A perfectly ____ body is defined as one which emits every wavelength with the maximum energy for each wavelength for the particular temperature of the body.

27. Given three vectors $vec{a} = {-}vec{i}{-}4vec{j}+2vec{k}$, $vec{b} = 3vec{i}+2vec{j}-2vec{k}$, $vec{c} = 2vec{i}{-}3vec{j}+vec{k}$, calculate $vec{a}cdot(vec{b}timesvec{c})$

28. If a force of 40N acting in the direction due East and a force of 30N is acting in the direction due North. Then the magnitude of the resultant forces will be ___________.

29. A mass accelerates uniformly when the resultant force acting on it

30. What is the unit of impulse?

31. The _________ is an aggregate of point masses such as that the relative separation between any two points remains invariant

32.  The resultant of vectors $vec{A}$ and $vec{B}$ has a magnitude of 20 units.$vec{A}$ has a magnitude of 8 units, and the angle between $vec{A}$ and $vec{B}$ is $40^{o}$. Calculate the magnitude of $vec{B}$

33. Instantaneous velocity is the velocity of a particle at some _____of its path.

34.  The motion of a ball rolling down a ramp is one with ________

35. A Null vector is a vector whose magnitude is __________.

36. __________forces meet at one point and have their lines of action in different planes.

37. According to the kinetic-molecular theory, particles of matter are in motion in both gas and _____.

38. According to principle of moment, if a system of coplanar forces is in equilibrium, then the algebraic ____of their moments about any point in their plane is zero

39.  The trajectory of a projectile is ________

40. An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take $g = 10ms^{-2}$

41. Which of the following substances has the highest viscosity at room temperature?

42.  The speed of 90 hm/hr is equal to ------------------ m/s

43. Given that the specific capacity of ice is one-half that of water, does is take more thermal energy to raise the temperature of 5 g of water or 5 g of ice by $$6^{o}C?$$

44. A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true?

45.  An ungraduated mercury thermometer attached to a millimeter scale reads 22.8mm in ice and 242mm in steam at standard pressure. What will the millimeter read when the temperature is 20^{o} C?

46.  Which of these is correct about viscosity?

47. _______ is that which enables a body to perform work.

48.  Which of the following statements is not correct about reference frames?

49. Gases occupy volume of the __________.

50. A _______ consists of two equal and opposite parallel forces.