Category Archives: Accounting

What makes urine have a higher specific gravity than distilled water?

Urinalysis Hands on Lab Assignment

 

Introduction:

The million nephrons in each of your kidneys form urine and which allows the body to get rid of metabolic wastes from blood and maintain homeostasis by regulating blood pH, water volume and ion concentrations in blood. Urinalysis is a standard test that can determine if the urine formation is normal or abnormal. In doing this lab we can determine the volume of urine, chemical and physical properties, and microscopic composition along with levels of some metabolic waste materials in blood.

Pre-activity

There are three processes for making urine, glomerular filtration, tubular reabsorption, and tubular secretion. Below, for each of the processes below, define them and describe where they occur in the nephron.

1. Glomerular Filtration

2. Tubular Reabsorption

3. Tubular….

Prepare a paper on your findings; be sure to include several pictures.

Flow visualization is direct observation of the flow field,

usually accomplished in a laboratory. Several photographs in this

book (see Figs. 3.1, 9.19, and 11.4) and the majority of the accompanying videos were made with the aid of a flow visualization

technique. Do some research on flow visualization techniques,

including those for both incompressible and compressible flows.

Find examples of the use of flow visualization to solve engineering problems. Prepare a paper on your findings; be sure to include

several pictures.

hat is the axial velocity, V1, of the plastic in the barrel?

Molten plastic at a temperature of 510 °F is augered through

an extruder barrel by a screw occupying 3

5 of the barrel’s volume

(Fig. P5.16). The extruder is 16 ft long and has an inner diameter

of 8 in. The barrel is connected to an adapter having a volume of

0.48 ft3

. The adapter is then connected to a die of equal volume.

The plastic exiting the die is immediately rolled into sheets. The

line is producing 4-ft widths of material at a rate of 30 ft/min

and a gauge thickness of 187 mil. What is the axial velocity,

V1, of the plastic in the barrel? Assume that the plastic density

is constant as it solidifies from a liquid (in the extruder) into a

solid sheet.

Determine the thickness of the water stream when it reaches the base of the cone.

A water jet leaves a fixed nozzle with a velocity of 10 m/s.

The jet diameter is 10 cm. A 30o

cone is pushed into the water

jet at a speed of 5 m/s. The water impinges on the cone with the

jet axis and the cone axis in perfect alignment so that the water

is divided evenly by the cone. Bernoulli’s equation suggests that

because the pressure on the jet boundary is constant, the water

velocity relative to the cone surface is constant. Determine the

thickness of the water stream when it reaches the base of the

cone.

Determine the horizontal and vertical force components (Fx and Fy) required to hold the lateral fitting stationary.

Figure P5.46 shows a lateral pipe fitting. This particular

fitting has a mainline diameter of 4.0 in. The diameter of the

lateral is 3.0 in., and the lateral angle is 45°; 60 °F water is flowing in the lateral. Measurements show that the pressure at point

1 is 34.0 psig, the pressure at point 2 is 35.0 psig, the pressure

at point 3 is 33.5 psig, and the flow rate at point 2 is 1.0 ft3/s.

Determine the horizontal and vertical force components (Fx and

Fy) required to hold the lateral fitting stationary. Neglect gravity.

Q1 = 1.63 ft3/s.

 

 

analyze a simplified schematic drawing of the carburetor of a gasoline

A simplified schematic drawing of the carburetor of a gasoline

(S = 0.75) engine is shown in Fig. P5.96. The throat area is 0.5 in.2

.

The running engine draws air downward through the carburetor Venturi

and maintains a throat pressure of 14.3 psia. The low throat pressure

draws fuel from the float chamber and into the airstream. The energy

losses in the 0.07-in.-diameter fuel metering line and valve are given by

 

where K = 6.0 and V is the fuel velocity in the metering line.

Assume that the air is an ideal fluid having a constant density ρA

= 0.075 lbm/ft3

. The atmospheric pressure is 14.7 psia. Calculate

the air-to-fuel ratio (m˙ a/m˙f).

Calculate the loss coefficient for a water temperature of 20 °C.

Figure P5.101 shows a test rig for evaluating the loss

coefficient, K, for a valve. Mechanical energy losses in valves are

modeled by the equation:

 

where ghL is the mechanical energy loss and V is the flow velocity entering the valve. In a particular test, the pressure gage reads

40 kPa, gage, and the 1.5-m3

catch tank fills in 2 min 55 s.

Calculate the loss coefficient for a water temperature of 20 °C.

Calculate the water velocity in the pipe and the mechanical energy loss (ft ∙

Figure P5.115 shows a pump testing setup. Water is drawn

from a sump and pumped through a pipe containing a valve. The

water is discharged into a catch tank sitting on a scale. During a

test run, 800 lb of water is collected in the catch tank in 15 s. The

pump power input to the fluid during this period is 700 ft ∙ lb/s.

Calculate the water velocity in the pipe and the mechanical energy

loss (ft ∙ lb/lbm) in the pipe and valve.

Write the location of Wrigley Field using rectangular coordinates.

In Chicago, the road system is set up like a Cartesian plane, where streets are indicated by the number of blocks they are from Madison Street and State Street. For example, Wrigley Field in Chicago is located at 1060 West Addison, which is 10 blocks west of State Street and 36 blocks north of Madison Street. Treat the intersection of Madison Street and State Street as the origin of a coordinate system, with east being the positive x-axis.

(a) Write the location of Wrigley Field using rectangular coordinates. (b) Write the location of Wrigley Field using polar coordinates. Use the east direction for the polar axis. Express u in degrees. (c) Guaranteed Rate Field, home of the White Sox, is located at 35th and Princeton, which is 3….

Assuming the farmer’s estimate of a needed 6-ton force is correct, will the farmer be successful in removing the stump?

A farmer wishes to remove a stump from a field by pulling it out with his tractor. Having removed many stumps before, he estimates that he will need 6 tons (12,000 pounds) of force to remove the stump. However, his tractor is only capable of pulling with a force of 7000 pounds, so he asks his neighbor to help. His neighbor’s tractor can pull with a force of 5500 pounds. They attach the two tractors to the stump with a 40° angle between the forces, as shown in the figure.

(a) Assuming the farmer’s estimate of a needed 6-ton force is correct, will the farmer be successful in removing the stump?

(b) Had the farmer arranged the tractors with a 25° angle between the forces, would he have….