Consider a two-dimensional flow field described by a potential function v=c+ dr? - ey? where constant c=4m2.s-1, d=3s-1, e=3s-1 and x and y are the horizontal and vertical position coordinates, respectively measured in meters.

a) derive the stream function (\psi) for this flow field.

b) plot streamlines for three iso-values of \psi=1,2,3. from these iso-streamlines, comment on how velocity in this flow field changes with x, y positions.

c)determine pressure gradient at point (1, 1) located within the field if the fluid is assumed to be water. (hint: include effect of gravity acceleration which is 9.81 m. s-2. density of water can be assumed to be 998.2 kg/m3).

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give