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ENGG252 (DB225) Engineering Fluid Mechanics

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If the vorticity in a region of the flow is zero, the flow is
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A cart is moving at a constant absolute velocity V_cart = 5 km/h to the right. A high-speed jet of water at an absolute velocity of V_jet = 15 km/h to the right strikes the back of the car. The relative velocity of the water is
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Water is flowing in a 3-cm-diameter garden hose at a rate of 30 L/min. A 20-cm nozzle is attached to the hose which decreases the diameter to 1.2 cm. The magnitude of the acceleration of a fluid particle moving down the centerline of the nozzle is
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Which one is not a fundamental type of motion or deformation an element may undergo in fluid mechanics?
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An array of arrows indicating the magnitude and direction of a vector property at an instant in time is called a
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A steady, incompressible, two-dimensional velocity field is given by V = (u, v) = (0.65+1.7x)i + (1.3-1.7y)j where the x- and y-coordinates are in meters and the magnitude of velocity is in m/s. The x- and y-component of velocity u and v at the point (x = 1 m, y = 2 m), respectively, in m/s, are
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A steady, incompressible, two-dimensional velocity field is given by V = (u, v) = (0.75+1.2x)i + (2.25-1.2y)j where the x- and y-coordinates are in meters and the magnitude of velocity is in m/s. The vorticity of this flow is
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A steady, incompressible, two-dimensional velocity field is given by V = (u, v) = (2xy+1)i + (-y^2-0.6)j where the x- and y-coordinates are in meters and the magnitude of velocity is in m/s. The angular velocity of this flow is
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Consider a

6.32-m-diameter spherical gate holding a body of water whose height is equal to

the diameter of the gate. Atmospheric pressure acts on both sides of the gate.

The horizontal component of the hydrostatic force acting on this curved surface

is

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A rectangular plate

with a width of 16 m and a height of 12 m is located 4 m below a water surface.

The plate is tilted and makes a 35

°

angle with the horizontal. The resultant

hydrostatic force acting on the top surface of this plate is

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