Adiffuser in a pipe flow is basically a slow expansion of the pipe diameter, which slows down the fluid velocity and increases the pressure (the bernoulli effect). water at room temperature flows with a volume flow rate of 0.0250 m3/s through a horizontal diffuser in which the pipe diameter increases gradually from d1 = 6.00 to d2 = 11.00 cm. the irreversible head loss through the diffuser is estimated to be 0.46 m. the flow is turbulent, and the kinetic energy correction factors at both the inlet and the outlet of the diffuser are assumed to be 1.05. repeat using the bernoulli equation (ignore irreversible head losses and ignore kinetic energy correction factors – in other words, set the kinetic energy correction factors to 1). calculate the percentage error in the result due to the bernoulli approximation. the percentage error in the result due to the bernoulli approximation is calculated to be

c. magnitude and direction

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

1 is a answer of a question