Monday

April 21, 2014

April 21, 2014

Number of results: 27,921

**physics**

The inside diameters of the larger portions of the horizontal pipe depicted in Figure P9.47 are 2.80 cm. Water flows to the right at a rate of 1.80 10-4 m3/s. Determine the inside diameter of the constriction.
*Wednesday, June 20, 2012 at 11:46pm by henry*

**Pre Calc**

A swimming pool can be filled by a vent in 10 hours. When the pool is filled, it can be emptied bya drain pipe in 20 hours. The pool manager mistakenly leaves the drain pipe open while trying tofill the pool. How long will it take to fill the pool?
*Friday, January 21, 2011 at 10:28am by Emily*

**physics**

why does an ideal fluid move faster through a pipe with decreasing diameter? a. the pressure within the fluid increases b. the pressure within the fluid decreases c. the pipe exerts more pressure on the fluid d. the fluid moves downhill C? the pressure in a fluid is related to...
*Wednesday, February 18, 2009 at 6:05pm by y912f to bobpursley*

**Physics**

A 300L water tank is 2.8m above the ground and constantly refills itself to always have 300L present. A pipe with a diameter of 12.5mm runs from it to the shower. Due to gravity, work out how many litres per minute are produced?
*Sunday, February 5, 2012 at 11:17pm by Em*

**Engineering**

Compute the average velocity of the water flowing in the pipe. Get this from the relation Q = A * V where Q is the volume flow rate and A is the cross sectional area. I recommend that you convert Q from gallons/min to ft^3/min, to get a flow velocity in ft/s. The time it takes...
*Monday, September 19, 2011 at 9:37pm by drwls*

**Math Help Please**

Let the pipe go from R (refinary) to P over a distance of 6-x km. The distance (under water) from P to S (storage) is therefore √(x²+2²). The total cost, C C = C1(6-x) + C2 (√(x²+2²)) where C1=cost on land C2 = cost under water, /km ...
*Thursday, October 28, 2010 at 1:17pm by MathMate*

**Physics**

LAST QUESTION: The seventh harmonic of a one end closed pipe organ has a frequency of 732 Hz, on a day when the temperature is 10 degrees Celsius. How long is the pipe? How long would it be for 732 to be the first harmonic? I used the same method for this problem - I just ...
*Tuesday, February 3, 2009 at 10:13pm by Harmonic*

**Math - Calculus**

consider the amount of water that flows through a cross-section of the pipe in 1 second. It is a conical solid, high in the center and zero at the edges. At radius r, the volume of the cylindrical shell of water is 2pi*r*h dr, where h = 10(1-r^2) So, the amount across the ...
*Saturday, December 15, 2012 at 1:17pm by Steve*

**physics**

Water fills and flows through an expanding pipeline that is inclined upwards. On the centreline of the pipe, Point 1 is 0.3 m below point 2. The velocities are V1 = 3.4 m/s and V2 = 1.7 m/s. The pressure at point 1 is 9300 N/m 2 . What is the pressure at point 2 assuming no ...
*Tuesday, May 8, 2012 at 11:52am by Aisling*

**Algebra**

b)The water line is given by the equation y=-2/3x-12 Suppose you want to put a pink flamingo lawn ornament in your backyard, but you want to avoid placing it directly over the water line, in case you need to excavate the line for repairs in the future. Could you place it at ...
*Thursday, June 26, 2008 at 9:02pm by Mandy*

**SCIENCE!!**

1. The usual examples are computer/electronic systems, but you could choose a home heating system. A home heating system could comprise, radiators, pipe work, boiler (water heater, control system, pump. These are all interconnected. The control system (usually a timer plus ...
*Sunday, February 8, 2009 at 11:34pm by Dr Russ*

**Maths**

think about it. each second, a 30cm tall cylinder of water passes through the pipe v = base * height 15cm^2 * 30 cm/s = 450 cm^3/s * 60s/min = 27000 cm^3/min = 27L/min
*Wednesday, January 11, 2012 at 11:25pm by Steve*

**Physics**

I have to plot a graph of Pressure gradient vs average velocity (water in a pipe, I have all the data). I plan to put the average velocity on the x axis, since I could control that better in an experiment. Do you agree/ Thanks. Charlie
*Monday, August 10, 2009 at 10:19am by Charlie*

**Math**

It takes pipe A 14 days to fill the fish pond. It takes pipe B 18 days to fill the same pond. Find out how pond it takes both pipes working together to fill the pond
*Monday, May 20, 2013 at 2:46am by Erika*

**language**

Thank you for using the Jiskha Homework Help Forum. There are MANY words for water actually! mizu, yes but clear water = kireina mizu; citty water = siudo; cold water = tsumetai; , ohiya; drinking water = nomi mizu fresh water = atarashii mizu; hot water = oyu; ice water = ...
*Friday, August 24, 2007 at 3:52am by SraJMcGin*

**probability April-004**

In a random sample of 95 sections of pipe in a chemical plant, 16 showed signs of serious corrosion. Construct a 98% confidence interval for the true proportion of pipe sections showing signs of serious corrosion, using the large sample confidence interval formula.
*Thursday, April 18, 2013 at 11:19am by probability*

**math**

You are asked to design a piping system that will connect a drilling rig 12 miles offshore to refinery on shore 20 miles down the coast. What values of x and y will give the least expensive connection if underwater pipe (x-section) costs $50.000 per mile and land-based pipe (y...
*Saturday, August 11, 2012 at 11:13pm by ibranian*

**English**

1. Join one section of the pipe to the next. 2. Join one section of pipe to the next. (Do we have to use 'the' or not? Which one is correct?)
*Saturday, April 24, 2010 at 1:07am by rfvv*

**hydraulics**

P = Po + (rho)*g*d The water density, rho, has to be in mass units (slugs/volume), not pounds/volume rho = 62.4 lb/ft^3/g = 1.938 slug/ft^3 d = 100 ft is the water column height Po = 14.7 lb/in^2 = 2117 lb/ft^2 is the atmospheric pressure above. P = 2117 + (1.938)*(32.2)(100...
*Wednesday, January 11, 2012 at 11:08pm by drwls*

**math**

a bathtub can be filled by the hot and cold water pipes in four minutes and, when full, can be emptied by the waste pipe in five minutes. If it is half full and all three pipes are set running, when will the tub be filled?
*Thursday, October 25, 2007 at 8:51pm by Charlie*

**Math**

a bathtub can be filled by the hot and cold water pipes in four minutes and, when full, can be emptied by the waste pipe in five minutes. If it is half full and all three pipes are set running, when will the tub be filled?
*Wednesday, March 4, 2009 at 7:55pm by Evan*

**physics**

1. Air flowing through a vent pipe of cross-sectional area 21[m^2] is traveling 0.89[ms^-1]. What is the flowrate? [18.7 m3s-1] Answer with three significant figures (don't forget to round!) or N/A if there is not enough information to answer the question. 2. Before the vent ...
*Friday, March 22, 2013 at 2:55pm by Sean*

**Math**

y=0.2x^2-1.6x+4.2 = 0.2(x^2 - 8x ) + 4.2 = 0.2(x^2 - 8x + 16 - 16) + 4.2 = 0.2( (x-4)^2 - 16) + 4.2 = 0.2(x-4)^2 - 3.2 + 4.2 = 0.2(x-4)^2 + 1 which is what you got, so you are correct up to that point Now, the vertex of the parabola is (4,1) which is 1 m above ground. But the ...
*Sunday, November 25, 2012 at 1:05pm by Reiny*

**Physics**

The water level in a vertical glass tube 1.40 m long can be adjusted to any position in the tube. A tuning fork vibrating at 440 Hz is held just over the open top end of the tube, to set up a standing wave of sound in the air-filled top portion of the tube. (That air-filled ...
*Wednesday, May 25, 2011 at 2:44pm by Emma*

**chemistry**

tell the taste of these types of water well water mineral water fresh water tap water earated water?
*Saturday, May 14, 2011 at 4:06pm by saim*

**Science**

If I take a 1 liter water bottle filled with water, what will most likely happen to the water and why? A.The water will get warmer B.The water will get cooler C.The water will stay the same D.None of the above I've tried this and I think it's A;if so why? Thanks -MC
*Monday, December 15, 2008 at 5:46pm by mysterychicken*

**Math**

A customer wants to make a tee-pee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the tee-pee, and he wants the teepee to be 12 feet across and 8 feet tall. The customer needs to figure out the length of the sides of the ...
*Wednesday, July 21, 2010 at 2:27pm by Lynn*

**physics**

water .04 m deep. volume = .04*.36 = .0144 m^3 bottom of sink to pail height difference is .85-.45 = .4 m We will have to assume no friction in the pipe or entrance or exit losses unless you know those . Thefore use bernoulli p + rho g * change in h + (1/2) rho v ^2 = constant...
*Thursday, May 21, 2009 at 9:17pm by Damon*

**Math (Re-post)**

A customer wants to make a tee-pee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the tee-pee, and he wants the teepee to be 12 feet across and 8 feet tall. The customer needs to figure out the length of the sides of the ...
*Wednesday, July 21, 2010 at 2:27pm by Lynn*

**chemistry**

Tongue touches a pipe . Calculate final temperature of the tongue. 500 g of aluminum. ambient temp is -5 degrees Celsius. tongue is 100 g. heat capacity is same as pure water. assume heat capacity of aluminum is 24 J/molK.
*Sunday, February 1, 2009 at 5:13pm by kat*

**math**

An inlet pipe can fill an empty pool in 3 hours. Another pipe can fill the same pool in 4 hours. How long will it take to fill the pool if both pipes are on? time=1pool/(1pool/3 + 1pool/4) Notice the rates add..1pool/4hrs + 1pool/3hrs. time=12/7 hrs so would this be 7 hrs or ...
*Saturday, September 27, 2008 at 10:54am by jennifer*

**algebra**

2. The equation relates the radius r of a drainpipe in inches to the flow rate F of water passing through it in gallons per minute. a. Find the radius of a pipe that can carry 600 gallons of water per minute. Round to the nearest tenth. (Let ) b. Solve the following equation ...
*Monday, July 11, 2011 at 1:03am by stephanie*

**Algebra**

Pipe A will fill 1/8 of the pool is 1 hour. Pipe B will fill 1/12 of the pool in 1 hour. So, 1/8 + 1/12 = 5/24 It will take 4.8 hours to fill the pool.
*Monday, May 24, 2010 at 9:54pm by Anonymous*

**Chemistry**

Products used to remove clogs in drains contain strong bases, such as sodium hydroxide (NaOH). If drain cleaner containing 10.0g NaOH's is added to a clogged drain pipe filled with 2.5L water how many moles of NaOH were added? It'd mean a lot if someone could explain this to ...
*Sunday, April 7, 2013 at 1:54pm by Allyson*

**phys101**

a homeowner wishes to drain her swimming pool by siphoning the water,whose depth is h,into a nearby gully a distance H below it,where H is much larger than h.She uses a pipe of cross-sectional areea a,and the pool has surface area A.How long does it take to empty the pool if h...
*Monday, April 19, 2010 at 6:47am by KABELO*

**Math (Re-post)**

A customer wants to make a tee-pee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the tee-pee, and he wants the teepee to be 12 feet across and 8 feet tall. The customer needs to figure out the length of the sides of the ...
*Wednesday, July 21, 2010 at 7:26pm by Lynn*

**physics**

A horizontal water main with a cross-sectional area of 206 cm2 necks down to a pipe of area 42.4 cm2. Meters mounted in the flow on each side of the transition coupling show a change in gauge pressure of 71.0 kPa. Determine the flow rate through the system, taking the fluid to...
*Monday, April 9, 2012 at 2:22pm by katie *

**Thermodynamics **

A centrifugal pump compresses 3000 liters/min of water from 98 KPa to 300KPa. the inlet and outlet temp are 25°C. The inlet and discharge pipe are on the same level but the diameter of the inlet piping is 15cm whereas that of the discharge piping is 10cm. Determine the pump ...
*Tuesday, February 16, 2010 at 10:30am by Janus*

**Physics-Resonance**

Sorry, but your answer is incorrect. Since the pipe is 3.00 m long and open at one end, the first resonance will occur with a wavelength four times the length of the pipe, or 12 m. Use 343 m/s for the speed of sound at 20°C. Velocity = Wavelength x Frequency Frequency = ...
*Monday, February 14, 2011 at 8:27pm by Collin*

**Algebra II**

#2 of 3 The original 14 gallons is 1/4 water, so it contains 3.5 gallons of water. When you are done removing and replacing x gallons of the mix with water, you still have 14 gallons, but it is 40% water, so that makes 5.6 gallons of water in the radiator afterwards. The ...
*Friday, January 11, 2008 at 3:14am by drwls*

**Algebra**

1) Mio can build a large shed in 15 days less than Yuuko can. If they build it together, it would take them 18 days. How long would it take each of them working alone? M: Y: 2) A sink can be filled by a pipe in 6 minutes but it takes 12 minutes to drain a full sink. If both ...
*Wednesday, November 6, 2013 at 9:49pm by Vice*

**Physics**

Alcohol flows smoothly through a horizontal pipe that tapers in cross-sectional area from A1 = 41.9 cm2 to A2= A1/3. The pressure difference Δp between the wide and the narrow sections of the pipe is 11.1 kPa. What is the volume flow rate ΔV/Δt of the alcohol? ...
*Tuesday, December 1, 2009 at 10:05pm by Sammy*

**science****

which of the following situations would be mist similar to an electrical current passing through a metal wire in a closed circuit? A. hot water moving through a pipe B. an automobile traveling through a tunnel C. an airplane flying through clouds D. a flying pan heating up on ...
*Friday, July 15, 2011 at 1:48pm by Anonymous*

**science****

which of the following situations would be mist similar to an electrical current passing through a metal wire in a closed circuit? A. hot water moving through a pipe B. an automobile traveling through a tunnel C. an airplane flying through clouds D. a flying pan heating up on ...
*Friday, July 15, 2011 at 2:31pm by Anonymous*

**Physics**

Water flowing through a 2.8 cm-diameter pipe can fill a 200 L bathtub in 5.8 min. Flow rate Q = volume/time = speed * cross section area Q=200/5.8=speed*.028....i get 1231.52 or Q=(200/348)=speed*.028...i get 20.52 both are wrong so what do i do?
*Monday, November 16, 2009 at 9:24pm by ana*

**physics**

It seems that water is being pumped into an opening near the bottom of the tank and being removed from an outlet higher above. Is this supposed to be a steady state situation? If so, (a) V*(outlet pipe area)= (volume flow rate at inlet) (b) The guage pressure difference is (...
*Wednesday, March 21, 2012 at 7:00am by drwls*

**Physics**

Just figured this one out! Okay, so: The frequency of the pipe(f_p), and of the string (f_s) are both the same, since frequency is source dependent. f_p=f_s Now, f_p=n(v_snd/4L_p) where n is 1 since the wave corresponds to the pipe's fundamental (first) frequency, v_snd is the...
*Friday, November 23, 2012 at 12:02am by Mike*

**physics**

Lubricating oil, with a relative density of 0.79, flows around a 90¨¬ bend. The pipe diameter is 0.45m, and the oil has a pressure head of 7m and the flow is 1.7m3/s. Find the force exerted by the oil on the bend. Oil density = 0.79 X 103 Volumetric mass flow rate = 1.7 m3/s ...
*Thursday, April 2, 2009 at 8:53pm by Michel*

**Fluid Mechanics**

find dV/dt out of the exit pipe. (if you are not in calculus,dV/dt is the flow rate of the water out). That will equal the flow rate of the air coming in, then convert that flow rate to velocity.
*Tuesday, September 10, 2013 at 5:35pm by bobpursley*

**General Science**

Surface water is important because it? 1. furnishes plants with water 2. provides a supply of drinking water 3. contributes to the water cycle 4. supplies water to rivers during dry periods
*Wednesday, May 13, 2009 at 7:21pm by Anonymous*

**physics- electrodynamics**

can someone walk me through this --- you'd be a lifesaver a rectangular pipe running parallel to the z axis(-‡ to +‡) has 3 grounded metal sides at y=0, y=a and x=0. the fourth side at x=b is maintained at a specified potential v0(y). a. Develop a general formula for the ...
*Sunday, August 5, 2007 at 11:46pm by jake*

**Math**

let the point directly across from P (the power plant) be Q. then FQ = 7 miles let R be a point between F and Q so that RQ = x miles, and FR = 7-x miles. RP^2 = x^2 + 16 RP = (x^2+16)^(1/2) So the path of the pipeline is PR + RF. Cost of pipe on land: $12 per foot = $12(5280) ...
*Monday, November 17, 2008 at 7:23pm by Reiny*

**college algebra**

water from a tank is being used for irrigation while the tank is being filled. The two pipes can fill the tank in 6h and 8h, respectively. the outlet pipe can empty the tank in 24h. How long would it take to fill the tank with all three pipes open? round the answer to the ...
*Wednesday, December 12, 2012 at 12:43pm by Zachery*

**physical**

You are playing a note that has a fundamental frequency of 440.00 Hz on a guitar string of length 59.1 cm. At the same time, your friend plays a fundamental note on an open organ pipe, and 4.0 beats per seconds are heard. The mass per unit length of the string is 1.93 g/m. ...
*Friday, April 18, 2014 at 6:26pm by mican*

**Chemistry Suspension Examples...**

sand+water,dust in air,oil+water,paint,flour+water,algae+water,chalk powder+water,concrete,muddy water,chocolate milk,medicines,blood,orange juice,droplets of oil in air,turmeric powder in water.if this wont help i dnt no what will!!!!!!!!!!!$$$$$
*Wednesday, June 15, 2005 at 7:34am by i rule$$$$!!!!!!!*

**science(chem) plastic hedache...can anyone help?**

My hwk Q that I was trying to find the answer to yesterday is this below but I don't know exactly how the placticizing process works. I compiled the chemicals I think I need but other than that I'm stumped as to how to put them together or how. Q: A water pipe has burst in ...
*Monday, February 18, 2008 at 4:47pm by ~christina~*

**physics**

What are the temperatures for freezing water and boiling water on the Kelvin temperature scale? a)273K for freezing water; 373K for boiling water b)0K for freezing water; 100K for boiling water c)32K for freezing water; 212K for boiling water
*Thursday, March 29, 2012 at 7:57pm by Kristie*

**Physics-Need Help fast!**

Part 1 A 3m long pipe is in a room where the temperature is 20 degrees C. What is the frequency of the first harmonic if the pipe is closed at one end? Part 2 sound traveling in air at 23 degrees C enters a cold front where the air temp is 2 degrees C. If the sound frequency ...
*Wednesday, July 27, 2011 at 9:56pm by Megan*

**Statistics**

A manufacturer has designed a process to produce pipes that are 10 feet long. The distribution of the pipe length, however, is actually Uniform on the interval 10 feet to 10.85 feet. Assume that the lengths of individual pipes produced by the process are independent. Let X and...
*Saturday, March 5, 2011 at 10:29pm by Hannah*

**science-plz help this is so urgent!**

8. a) after the oceans, where is the next largest reserve of water found? b) does this reserve contain salt water or fresh water? Fresh water lakes on the surface. Glaciers and icecaps account for a greater amount of water than lakes swamps and rivers if they were melted. I ...
*Thursday, June 7, 2007 at 10:13pm by jen*

**physics**

Without the figure, I have no idea what the two diameters are, nor where the uppoer pressure gauge is located. Use the continuity equation V+d^2 = constant to relate velocity to pipe diamter. Then use the Bernoulli equation (1/2)*(rho)^V^2 + P +(rho)*g*h = 0 to relate pressure...
*Saturday, March 26, 2011 at 6:52am by drwls*

**Physics**

The volume of the pipe is pi R^2 L = 1.93*10^-2 m^2 = 19.3 liters Calculate how much that volume of water increases when being heated from 20 to 75 C. You will need the bulk thermal expansion coefficient of water. It varies a lot from 20 to 75 C, but a suitable mean value is 4...
*Saturday, April 5, 2008 at 3:29am by drwls*

**physics**

Calculate the dimensionless Reynolds number, Re = (rho)*D*V/(viscosity) The flow is * laminar when Re < 2300 * transitional when 2300 < Re < 4000 * turbulent when Re > 4000 The viscosity of water at 20 C is mu = 1.002*10^-3 N*s/m^2 or kg/m*s The pipe cross ...
*Tuesday, February 8, 2011 at 10:10am by drwls*

**Science**

Which of the following contain water that is easily available for human use? (more than one answer) Icecaps & glaciers - 76% of fresh water Shallow Groundwater- 12% of fresh water Deep Groundwater - 11% of fresh water Lakes & Rivers - 0.34% of fresh water Water Vapor - 0.037% ...
*Thursday, January 14, 2010 at 7:44pm by Anya*

**introductory physics concept**

The charges do not have to flow "through" the capacitor. They merely flow into one side of the capacitor, building up the voltage as long as they flow and build up. If the voltage on the capacitor is not changing, then no current is flowing into or out of it. The capacitor is ...
*Thursday, February 16, 2012 at 11:08pm by Damon*

**Engineering**

Your green house irrigation sytem is plumbed with 3/4" pvc pipe from which 1/2" branch lines are routed to each row of plants. if the city supplies water that flows at 3ft/sec what is the velocity of the water at plants level? WEhat is the flow rate in gallons per min at plant...
*Sunday, September 10, 2006 at 2:30pm by Matt*

**PHYSICS**

We have the standing sound wave in a pipe; an open end is the antinode for air column, a closed end (the water surface) is the node. The distance between two adjacent nodes is the half of the wavelength: λ/2 = 0.345 – 0.145 = 0.2 m, λ = 0.4 m. λ = v•T = v/f. In ...
*Monday, May 7, 2012 at 7:13pm by Elena*

**college**

In warm climates, drinking water is often cooled by evaporating water from the surfaces of clay pots or canvas bags. How many liters of water may be cooled from 37 ºC to 24 ºC by the evaporation of 100 g of water? The heat of vaporization of water is 2.4 kJ/g, and the specific...
*Thursday, October 28, 2010 at 4:16pm by Abiola Ajibola*

**Design**

The flow system as shown in the Figure, the centrifugal pump(3500 R.P.M.) is delivering water at 100 gal/min and 70 °F into a boiler operating at a pressure of 35 psig. The water levels in the feed tank and boiler are constant. Because corrosion is expected to be negligible, ...
*Tuesday, December 17, 2013 at 8:33am by NONO*

**physics**

Steel expands 11 parts in a million for each 1 degree C change. Consider a 40,000 km steel pipe that forms a ring to fit snugly all around the circumference of the Earth. Suppose people along its length breathe on it so as to raise its temperature 0.80 degree C. The pipe gets ...
*Saturday, March 31, 2012 at 10:15am by C*

**physics**

Steel expands 11 parts in a million for each 1 degree C change. Consider a 40,000 km steel pipe that forms a ring to fit snugly all around the circumference of the Earth. Suppose people along its length breathe on it so as to raise its temperature 0.80 degree C. The pipe gets ...
*Sunday, April 1, 2012 at 10:46pm by christy*

**physics**

Steel expands 11 parts in a million for each 1 degree C change. Consider a 40,000 km steel pipe that forms a ring to fit snugly all around the circumference of the Earth. Suppose people along its length breathe on it so as to raise its temperature 0.80 degree C. The pipe gets...
*Tuesday, April 3, 2012 at 8:08am by christy*

**physics**

straight pipe
*Friday, August 19, 2011 at 9:48pm by samana*

**physic**

an ideal fluid flows through a pipe hat runs up an incline and gradually rises to a height H. The cross sectional area of the pipe is uniform. compared with the flow at the bottom of the incline, the flow at the top is a) moving slower at lower pressure b) moving slower at ...
*Sunday, January 8, 2012 at 6:08pm by john*

**Physics help please****

a) the product of flow area and velocity is constant V' = 0.88*(2.1/1.0)^2 = 3.88 m/s is the velcoity in the smaller-diameter pipe. b) use the Bernoulli principle with variable height P + (1/2) (density)*V^2 + (density)* y = constant y = 7.1 m on the second floor and 0 at the ...
*Monday, November 24, 2008 at 7:07pm by drwls*

**Music**

How to play the pipe organ
*Wednesday, June 8, 2011 at 5:01am by Pipe organ*

**3rd homework**

the water cycle lesson 2 how water changes and moves 1. ____________ water changes from a __________ to a _________________ 2. ____________ water changes from a _________ to a ________________ 3. _________________ Liquid water falls to the ground as _______________ * the water...
*Wednesday, October 27, 2010 at 5:20am by choconcung*

**chemisry**

Why does luis place 3 cups of water without any solute in the freezer? a. if some water spills, he will have extra b. the plain water is the control group c. he wants to know how long water takes to freeze d. the 3 cups of water are unnecessary to the experiment (b)
*Friday, February 26, 2010 at 11:16am by mary1111*

**Physics**

Alcohol flows smoothly through a horizontal pipe that tapers in cross-sectional area from A1 = 41.9 cm2 to A2= A1/3. The pressure difference Äp between the wide and the narrow sections of the pipe is 11.1 kPa. What is the volume flow rate ÄV/Ät of the alcohol? The density of ...
*Wednesday, December 2, 2009 at 8:02pm by Rebecca*

**physics**

The speed of sound is higher by a factor sqrt(475/297) = 1.265 at the higher temperature. Frequency = (wave speed)/(wavelength) Fundamental wavelength will not change with T because it depends upon pipe length. If the cooler-air pipe has a fundamental frequency of 475 Hz, it ...
*Friday, December 7, 2012 at 11:50pm by drwls*

**Advanced Maths**

QB = flow rate through big pipe QB = 1 res /t hours QS = flow rate through small pipe QS = 1 res / (t+3) hours 2 (QB+QS) = 1 res 2 [ 1/t + 1/(t+3) ] = 1 2(t+3) + 2 (t) = t^2 + 3 t 2 t + 6 + 2 t = t^2 + 3 t t^2 - t -6 = 0 (t-3)(t+2) = 0 t = 3
*Saturday, February 15, 2014 at 12:40pm by Damon*

**language**

Write the verb in each sentence. Write whether the action is past, present, or future 1. A Potter adds sand to the clay (adds, present) 2. Then he rolls the clay into long, pipe-shaped pieces. (Pipe-shape, past) 3.Another potters will use a potter's wheel . (will use, future) ...
*Tuesday, February 7, 2012 at 7:09pm by jj*

**chemistry**

cold water mass of calimeter+ water: 68.66g mass of calimeter: 19.19g mass of water: 49.47g final temperature of water: 39.1C initial temperature of water: 25.5C delta(T) of water: 13.6C hot water mass of calimeter+ water: 79.55g mass of calimeter: 20.61g mass of water: 58.94g...
*Wednesday, November 30, 2011 at 10:44pm by Yuli*

**Physics**

What is an organ pipe? What is an air horn?
*Wednesday, March 26, 2008 at 7:39pm by bobpursley*

**math**

He Burned His Lip In The Exhaust Pipe
*Wednesday, March 28, 2012 at 9:56pm by Taylor *

**science**

what the area of an open end of a pipe?
*Monday, February 4, 2013 at 9:31pm by Michael*

**physics**

balloon filled with 1 liter of water (1000 cm^3) in equilibrium in a container of water, the balloon is totally submerged in the water. a. What is the mass of 1 liter of water? b. What is the weight of the 1 liter of water? need assitance in setting up problem and figuring out...
*Monday, October 23, 2006 at 10:49pm by mitch*

**Science**

clean water is what we drink, it is water from various sources which have been treated to remove dirt, grit, bacteria, and toxins. Pure water is made in a lab, it is just H2O and nothing else. Distilled water is very close to pure water.
*Sunday, March 15, 2009 at 4:31pm by bobpursley*

**Chemistry**

I don't understand your question. Water never H^+ and O6- ions. When liquid water evaporates it becomes water vapor. It still is water and the molecules are intact.
*Thursday, January 21, 2010 at 6:35pm by DrBob222*

**Organic Chemistry**

Water/methanol and water/acetone are viable solvent systems for recrystallization,but water/chloroform and water/pentane are not. Briefly explain in 1-2 sentences.
*Sunday, October 13, 2013 at 4:14pm by Cheech*

**Physics**

At one point in a pipeline, the water's speed is 3.00 and the gauge pressure is 4.00×104 . Find the gauge pressure at a second point in the line 11.0 lower than the first if the pipe diameter at the second point is twice that at the first. I've been trying to use Bernoulli's ...
*Saturday, January 30, 2010 at 12:36pm by Steph*

**Economics**

3. Suppose the Clean Springs Water Company has a monopoly on bottled water sales. If the price of tap water increases, what is the change in Clean Water’s profit-maximizing levels of output, price, and profit? Explain in words and with a graph. Take a shot. What do you think. ...
*Friday, December 1, 2006 at 12:42am by Sally*

**RE: Water**

If I boil water at home, when and how do I know I've boiled the water long enough to make distilled water?
*Tuesday, January 1, 2008 at 8:20pm by Diana*

**math**

So he'd have 190 pipe cleaners left.
*Sunday, August 23, 2009 at 3:06pm by oneirocritic*

**8th grade**

how to make a double line graph to show air/water temperatures.mon.air-92 water-68tues.air-94 water-69 wed.air-88 water=70,thurs. air=85 water=72 and friday air=96,water=72
*Wednesday, June 9, 2010 at 4:23pm by will*

**mat 116**

two large storage tanks, T and W contain water. T starts losing at the same time additional water starts flowing into W. The graph below shows the amount of water in each tank over a period of hours. Assume the rates of water loss ad water gain continues as shown. At what ...
*Sunday, March 2, 2014 at 9:15am by csrla*

**Water Treatment**

Based on the treatment scheme, what type(s) of raw water is / are being treated? Groundwater River water Riverbank filtrate Lake water Infiltrated river water please post answer
*Friday, October 18, 2013 at 3:49pm by Naifaru*

**Water Treatment**

Based on the treatment scheme, what type(s) of raw water is / are being treated? Groundwater River water Riverbank filtrate Lake water Infiltrated river water please post answer
*Saturday, October 19, 2013 at 5:22am by Naifaru*

**Chemistry**

If 22 g of water is heated so that the water temperature rises from 18.1°C to 21.5°C, how many calories have been absorbed by the water? The specific heat of water = 1.00 cal / (g · °C)
*Monday, October 25, 2010 at 12:55am by Cassie*

**physical**

in a water tank is filled wiyh 1026 lter of water,we want to mixed sodium nirtride by 17% of the water,how much we used sodiume nitride in kilogram in to the water?
*Saturday, September 14, 2013 at 8:36am by imran*

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