The stream function for a two-dimensional, incompressible flow field is given by the equation ψ=2x-2y where the stream function has the units of ft2/s with x and y in feet
part a) the streamlines for this flow field and the direction of flow along the streamlines are
a) y=x+ψ2, the direction of frlow is up and to the left
b) y=-x+ψ2, the direction of frlow is up and to the right
c) y=-x+ψ2, the direction of frlow is down and to the right
d) y=x-ψ2 , the direction of frlow is down and to the left
part b) is this an irrotational flow field?
part c) determine the magnitude of the acceleration of a fluid particle at the point x = 1 ft, y = 2 ft.
|a(1 ft,2 ft)|=?

the force required to move the cart is divided by three or 33.33 n.

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//

the right answer is 0.3 meters per second