Share
Explore BrainMass

Fluid Mechanics

Find the volume of the paperweight.

1. A pirate in a movie is carrying a chest (0.30 m X 0.30 m X 0.20 m) that is supposed to be filled with gold. To see how ridiculous this is, determine the weight (in newtons) of the gold. To judge how large this weight is, remember that 1 N = 0.225 lb. 2. An airtight box has a removable lid of area 1.3 X 10^-2 m^2 and ne

Fluid mechanics Questions - Manning's Formula

11) The angle between the tow sloping sides of a standard triangular weir is 60 degrees. When the head of the crest of the weir is .525ft, the rate of discharge, in cubic feet per second, would be? .405 cfs, .331 cfs, .368 cfs, .294 cfs. 12) The diameter of a circular sewer is 42 in., and the rate of slope is .

Fluid Mechanics

6) A sewer 24 in. in diameter is made of concrete pipe for which the value of n may be taken as .014. The rate of slope is .0007, and the depth of the liquid is 18.0 in. what is the rate of discharge. 6.3 cfs., 5.1 cfs, 5.5 cfs, 4.2 cfs 7) The Reynolds number for liquid flowing in a pipe is 28,600. The frictio

Discussing a Bernoulli Problem

Hi, I need help understanding the effects of a stream which is flowing through a tube. I've prepared the following problem for discussion. Using Bernoulli's equation and the steady flow momentum relation to calculate the net force on a tube from a dynamic pressure drop and a water flow stream flowing through ta tube. See t

Venturi meter - Similitude problem

A model of a venturi meter has linear dimensions one-fifth those of the prototype. The prototype operates on water at 20 degrees Celsius, and the model on water at 95 degrees Celsius. For a throat diameter of 600 mm and a velocity at the throat of 6 m/s in the prototype, what discharge is needed through the model for similitude?

Volume and Cubic Meters

A volume of 100.cm3, is how many cubic meters? a. 1.00 b. 1.00 x 10^-2 c. 1.00 x 10^-4 d. 1.00 x 10^-6 e. 1.00 x 10^-3

Pressure on a submarine

Assuming the density of seawater is 1.03 g/cm3, find the total weight of water on top of a nuclear submarine at a depth of 185 m if its (horizontal cross-sectional) hull area is 3200 m2. In atmospheres, what pressure would a diver experience at this depth? Do you think that occupants of a damaged submarine at this depth cou

A large cylinder tub of water rests at the edge of a table 150.0 cm high.

A large cylinder tub of water rests at the edge of a table 150.0 cm high. The tub is full, it is 110.0 cm tall with top area of 1000 cm^2. If a hole 1.0 cm^2 is made in its side 10.0 cm above the bottom: (a) Determine the speed of the water as it leaves the side. (b) How far will it reach when it hits the ground?

Find the mass of the log...

A log of wood is floating in water with 40% of its volume above the surface of the water. if the volume of the log is 0.4 m^3, find the mass of the log. a. 200kg b. 240 kg c. 160 kg d. 16 kg

Find the height at which the tank is located...

Water is pumped through a pipe to a tank at the top of a building. The pressure of the water at ground level is 2.2* 10^5 Pa and at the tank, the pressure is atmospheric. If the diameter of the pipe is the same throughout, find the height at which the tank is located. Atmospheric pressure may be assumed as 1.0 * 10^5 Pa and G as

Fluid Dynamics and Bernoulli's Equation

The gauge pressure in a garden hose is 2.0 atmospheres. If the cross-sectional area of the hose is 4.0 cm^2 and the nozzle output area is 0.4 cm^2(cm^2= 10^-4m^2): (a) How fast does the water leave the hose? (b) If the hose is held parallel to the ground and is 1.0 m above the ground, how far out will it travel before it hits

Solving for Volume

Question: Given that we have 1200 cm^3 of helium at 15 degrees Celsius and 99kPa, what will be its volume at STP?

Fluid Mechanics: U Tubes

A U tube open at both ends is partially filled with water. Oil having a density of 750 kg/cubic meter is then poured into the right arm and forms a column L = 5.00 cm high. (a) Determine the difference h in the heights of the two liquid surfaces. The right arm is then shielded from any air motion while air is blown across the

Fluid Mechanics

When a body is travelling faster than the local speed of sound, often a shock wave is created. Describe the physical causes of such a shock wave. (See attachment for full question)

Fluid Mechanics

Assume that the energy equation for a compressible gas can be written as:... Explain the meaning and units of the terms H,V,z,Q and W in this equation. (See attachment for the rest of the question)

Problem 15.41

Please do not include your response in a .pdf or .cdx format, but Word documents are okay. Thanks! Here's the actual problem: A U-shaped tube, open to the air on both ends, contains mercury. Water is poured into the left arm until the water column is 13.1 cm deep. How far upward from its initial position does the mercury i

Mass and buoyancy

Taking buoyancy of air into account, which has the greater mass: A large block of wood or a smaller block of iron on weighing scales and both having the same weight- 1 ton?

Fluid Dynamics

During each heartbeat, approximately 70cm³ is pushed from the heart at an average pressure of 105mm-Hg. Calculate the power output of the heart, in watts, assuming 70 beats per minute. *please explain this as simply as possible- thanks so much :)

Fluid Dynamics

What gauge pressure in the water mains is necessary if a firehose is to spray water to a height of 15m?

Fluid Dynamics

A 5/8 inch (inside) diameter garden hose is used to fill a round swimming pool 6.1m in diameter. How long will it take to fill the pool to a depth of 1.2m if water issues from the hose at a speed of 0.33m/s? *note- please explain this in the simplest way possible if you can! thank you :)

Fluid Statics

A 3.15kg piece of wood (SG= .50) floats on water. What minimum mass of lead, hung from it by a string, will cause it to sink? *note- please explain this in the simplest way possible if you can! thank you :)

Fluid Statics

If you tried to nonchalantly smuggle gold bricks by filling your backpack, whose dimensions are 60cm x 25cm x 15cm, what would its mass be?

Rim of a cast iron flywheel.

The rim of a castiron flywheel is 0.5m wide and its inner and outer diameters are 1.8m and 2.6m respectively. Calculate a) the moment of inertia of the rim about its geometric axis and b) the radius of gyration k.

Mechanics

The acceleration of a marble in a certain fluid is proportional to the speed of the marble squared and is given in SI units) by a=-3.00 v^2 for v greater than 0. If the marble enters this fluid with a speed of 1.20 m/s, how long will it take before the marble's speed is reduced to half of its initial value?

Find NC for a gold Schottkey diode

Consider a gold Schottkey diode at T=300k formed on a n-type GaAs doped at Nd=5x10^16 cm^-3. Among other things find Phi|n. Phi|n=KT/e*ln(Nc/Nd) I don't understand how to get NC from the information given here. What is NC given the information stated in the problem?

Gear pump volume and pressure difference

The diagram shows a gear pump. The maximum diameter of the gear wheels is 80 mm, the diameter of the roots of the teeth is 50 mm and the tooth width is 20mm. If the pump is driven at 500 rpm, please estimate the volume of oil pumped every minute. If the pressure difference across the pump is 50 bar, what shaft power has to be

Retracting cylinder: How far does an elevator settle as the passengers enter?

A 2" diameter hydraulic ram piston supports an elevator in a 2 story building. When the elevator car is at the first floor, the piston is fully retracted into the cylinder. The piston extends 15 feet to place the empty car at the second floor. Eight passengers who each weigh exactly 150 lb. enter the car. If the bulk modulus