## A viscous liquid of constant ρ and μ falls due to gravity between two plates a distance 2h apart, as in Fig. P4.37….

Question: A viscous liquid of constant ρ and μ falls due to gravity between two plates a distance 2h apart, as in Fig. P4.37. The flow is fully developed, with a single velocity component w = w(x). There are no applied pressure gradients, only gravity. Solve the Navier-Stokes equation for the velocity profile between the plates.   Click Read more…

## Consider a viscous film of liquid draining uniformly down the side of a vertical rod of radius….

Question: Consider a viscous film of liquid draining uniformly down the side of a vertical rod of radius a, as in Fig. P4.84. At some distance down the rod the film will approach a terminal or fully developed draining flow of constant outer radius b, with  Assume that the atmosphere offers no shear resistance to Read more…

## A bottle of liquid is to be poured by a machine. Three positions desired are depicted below. We want to make a four-bar…

Question:  A bottle of liquid is to be poured by a machine. Three positions desired are depicted below. We want to make a four-bar mechanism that attaches to the locations indicated by the arrows. 5. (1) Synthesize the mechanism. (2) Sketch the mechanism in three required positions. (3) Describe your Read more…

## A liquid-level system, such as the one shown in Fig. 5–1, has a cross-sectional area of 3.0 ft2. The valve characteristics are where q = flow rate, cfm…

Question: A liquid-level system, such as the one shown in Fig. 5–1, has a cross-sectional area of 3.0 ft2. The valve characteristics are where q = flow rate, cfm, and h = level above the valve, ft. Calculate the time constant for this system if the average operating level above the valve is (a) 3 Read more…

## A liquid delivery system is being designed such that ethylene glycol flows out of a hole in the bottom of a large tank, as in Fig. P7–99….

Question: A liquid delivery system is being designed such that ethylene glycol flows out of a hole in the bottom of a large tank, as in Fig. P7–99. The designers need to predict how long it will take for the ethylene glycol to completely drain. Since it would be very Read more…

## Saturated liquid R-134a at 25°C is throttled to 300 kPa in a refrigerator. What is the exit temperature? Find the percent increase in the volume flow rate….

Question: Throttle Flow Saturated liquid R-134a at 25°C is throttled to 300 kPa in a refrigerator. What is the exit temperature? Find the percent increase in the volume flow rate.   Click the button below to view answer! If you happen to run into some problem while following the steps, Read more…

## A ray of light, emitted beneath the surface of an unknown liquid wi…

Home/Education/Expert Q&A/A ray of light, emitted beneath the surface of an unknown liquid wi… Question: A ray of light, emitted beneath the surface of an unknown liquid with air above it, undergoes total internal reflection as shown in the figure below. (Assume d = 21.7 cm and h = 20.0 cm.) What is the Read more…

## In an absorption tower (or absorber), a gas is contacted with a liquid under conditions such that one or more…

Home/Education/Expert Q&A/In an absorption tower (or absorber), a gas is contacted with a liquid under conditions such that one or more… Question: In an absorption tower (or absorber), a gas is contacted with a liquid under conditions such that one or more species in the gas dissolve in the liquid. Read more…

## The density of liquid water at the boiling point (100 degrees Celsius) is 958 kg m-3. By what factor…

Home/Education/Expert Q&A/The density of liquid water at the boiling point (100 degrees Celsius) is 958 kg m-3. By what factor… Question: The density of liquid water at the boiling point (100 degrees Celsius) is 958 kg m-3. By what factor does the volume of the water increase when it changes Read more…