16. The atmospheric pressure in a certain area is determined to be 103.36 kPa, using a mercury barometer shown in the figure below. (Acceleration due to gravity, g = 10 m/s², and density of mercury, P_m = 13.6 x 10³ kg/m³

The height to which the mercury column rises is about

17. An object dropped into a sea sinks to a depth of 100 m. Which of the following is correct about the pressure the object experiences? (Assume the density of seawater is 1030 kg/m³ and the air above the see exerts a pressure of P_atmospheric = 1.01 × 10⁵ Pa, g = 10 m/s²

18. How much heat energy is required to change 5 kg of ice at -20 °C to water at 10 °C? (Specific heat capacities of water in liquid and solid phases are 4.2 kJ/kg°C and 2.1 kJ/kg°C, respectively, and latent heat of fusion of water, L_f=336000 J/kg).

19. A force that is exerted on a simple machine in order to produce input work is called

20. Which one of the following statements is correct about transverse and longitudinal waves?

21. An object that is partially or fully submerged in a fluid experiences an upward force from the fluid. The apparent weight of the object is the weight of the

22. A force is applied to push a box of mass, m along the slop of inclined plane with constant velocity as shown in the figere below.

If the coefficient of friction between the box and the plane is μ, the actual mechanical advantage (AMA) of the inclined plane is:

23. A wheel and axle with radii 40 cm and 8 cm respectively is used to lift a bucket containing 6 kg of water from a well. If an effort of 20 N is applied on the wheel, the percentage efficiency of this simple machine is:

24. Block A of mass (M₁ = 8.0kg) is initially moving at u₁ = 6m/s in the positive x-direction. It collides with block B of mass (M₂ = 12kg), moving in the same direction at (u₂= 3m/s). Immediately after collision, the velocity of block A becomes (v₁= 4m/s) (positive x-direction). What is the velocity of block B immediately after the collision?

25. Suppose a particle of mass, m is tied to a string and then whirled around in a horizontal circle of radius r about the center O as shown in the figure below.

If the string makes an angle of θ to the vertical while rotating, the component of the force that is responsible for the circular motion of the mass by providing the centripetal force is

26. Which one of the following statements is correct about the fundamental forces in nature and their applications?

27. A spring stores 120 J of elastic potential energy when it is stretched by 0.5 m. What is the potential energy stored by the spring when it is stretched by 1.5 m?

28. A crane at port is used to lift 10,000 kg object to a height of 20 m. If the power developed by the crane is 50,000 W, how long does it take to lift the object? (Acceleration due to gravity, g = 10 m/s²)

29. The velocity-time graph of an object moving in a straight line is shown in the figure below.

What is the magnitude of the total displacement covered by the object in the time interval of 14 seconds?

30. A system of four masses m₁ = 4 kg, m₂ = 4 kg, m₃ = 5 kg and m₄ = 3 kg are located in the xy-plane at the coordinates of (0, 0), (30cm, 0), (-40cm, 0) the system? and (0, 20cm), respectively. What is the coordinate of the center of mass of the system?