Friday

August 29, 2014

August 29, 2014

Number of results: 51,595

**Chemistry**

A 893 g sample of a solution of the solute (CH3)2CO in the solvent C4H8O that has a concentration of 28.6 pph by mass (CH3)2CO is available. Calculate the amount (g) of acetone that is present in the sample. Molar Mass (g/mol) (CH3)2CO 58.05 C4H8O 72.12 Density (kg/m3): (CH3)...
*February 14, 2010 by Anonymous*

**chemistry**

You are analyzing a solid isolated from a reaction and find that its boiling point is over 1000 ∘C. You dissolve the compound in water solution and recrystallize it to produce some solid crystals that you use to determine that the compound is a crystalline solid. Which ...
*January 23, 2014 by Sheila*

**Geometry**

A study draws triangle with a perimeter 36cm.the study says that the longest side measures 18cm. how do you know that the student is incorrect?
*January 31, 2011 by JUn*

**wchs**

A checkerboard measures 144 square inches. What is the length of a small square on its side? Hint: It has 8 squares per edge.
*January 30, 2012 by Clara*

**Geometry/Math again!**

The base of a prism is a regular hexagon that measures 4 cm on each side. The prism has a height of 13 cm. What is its total surface area?
*May 21, 2012 by Lex*

**science**

a u-tube is partially filled with water.oil which does not mix with water is next poured into one side until water rises by 2.5cm on the other side.if the density of oil be 0.8 ,the oil level will stand higher than the water level by how much?
*May 17, 2012 by abuobaida johar*

**Physics**

Why do your vowels examples ("aaah", "eee", "uhh") sound different then when I make them? Explain. Tension, mass density and the length of our vocal cords differ so would that be the reason why they sound different? For instance: a child's voice is usually higher pitched than ...
*March 1, 2008 by Andrea*

**Physics Help..**

A small cube (m=0.290 kg) is at a height of 261 cm up a frictionless track which has a loop of radius, R = 28.71 cm at the bottom. The cube starts from rest and slides freely down the ramp and around the loop. Find the speed of the block when it is at the top of the loop. A ...
*February 12, 2014 by Ron*

**Science**

One edge of a copper cube is carefully measured and found to be 2.162 cm. An atom of copper is a sphere 0.2560 nanometers in diameter. Assuming that the volume of the cube contains nothing but copper atoms, how many copper atoms are contained in the cube? (the volume of a cube...
*September 24, 2011 by Laurel*

**chemistry **

please check if I did this right ... calculate the mass of white solid CaCO3 that forms when 98ml of a 0.1M Ca(NO3)2 solution is mixed with 54 ml of a 2.5M Na2CO3 solution. Ca(NO3)2 + 2NaCO3 -> Ca(CO3)2 + 2NaNO3 .098*0.1 =.0090 .054*2.5 =.135 limiting reactant is Ca(NO3)2 ....
*January 29, 2010 by Krissy*

**math**

If a cube is built from an one inch cubes and if each new cube has an edge N times as long as the previous model what would be true of consecutive surface areas
*March 31, 2011 by Cheyenne*

**Chem I**

Calculate the concentrations of hydronium and hydroxide ions in a solution prepared by dissolving 0.345g of solid NaOH in enough water to make 225mL of solution. Also calculate the pH and pOH of the solution.
*November 15, 2010 by Natalea*

**Chemistry**

What is true for water? A) In a phase diagram the solid-liquid coexistance line has a negative slope. B) In a phase diagram the solid-liquid coexistance line has a positive slope. C) The solid is more dense than the liquid. D) The solid is less dense than the liquid. E) The ...
*December 9, 2012 by Anon*

**maths**

A paving block is is in the shape of a prism, the area of it' cross section being 154cm^2.The prism i 17cm long ad the material from whih it is made has a density of 2.2g/cm^3. Calculate the mass of the paving block. Please can you tell me the method aswell thanks
*June 6, 2009 by chelsea*

**Chemistry**

If 0.790 mol of solid TiO2 and 8.53 g of solid C are reacted stoichiometrically according to the balanced equation, how many moles of solid TiO2 remain? 3TiO2(s) + 4C(s) + 6Cl2(g) → 3TiCl4(l) + 2CO2(g) + 2CO(g)
*February 10, 2009 by Anonymous*

**math**

A building lot in a city is shaped as a 30 -60 -90 triangle. The side opposite the 30 angle measures 41 feet. a. Find the length of the side of the lot opposite the 60 angle. b.Find the length of the hypotenuse of the triangular lot. c. Find the sine, cosine, and tangent ...
*March 8, 2013 by allison*

**prealgebra**

A building lot in a city is shaped as a 30 -60 -90 triangle. The side opposite the 30 angle measures 41 feet. a. Find the length of the side of the lot opposite the 60 angle. b.Find the length of the hypotenuse of the triangular lot. c. Find the sine, cosine, and tangent ...
*July 31, 2014 by Anonymous*

**physics**

Each of the following objects has a radius of 0.180 m and a mass of 2.65 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 41.4 rad/s. Find the magnitude of the angular momentum of each object. a) a hoop ___ kg m/s b) a ...
*December 15, 2012 by anonymous*

**physics**

Each of the following objects has a radius of 0.180 m and a mass of 2.65 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 41.4 rad/s. Find the magnitude of the angular momentum of each object. a) a hoop ___ kg m/s b) a ...
*December 15, 2012 by anonymous*

**Chemistry**

In a laboratory activity, a student team measures the heat released by burning heptane. Using the following data, calculate the molar heat of combustion of heptane in kJ/mol: Mass of water - 179.2 g Initial water temperature - 11.6 degrees C Final water temperature - 46.1 ...
*April 21, 2008 by Natasha*

**physics**

To determine the density of block of aluminum, you measured the mass at 101.1 g and a volume of 38.2 cm3 . When you looked up the value for aluminum density you found out it should be 2700 kg/m3 What is the percent error for your experimental data? a) 1.98% c) 19.8% b) 0.198...
*January 20, 2011 by Anonymous*

**chemistry **

A 893 g sample of a solution of the solute (CH3)2CO in the solvent C4H8O that has a concentration of 28.6 pph(parts per hundred) by mass (CH3)2CO is available. Calculate the amount (g) of acetone that is present in the sample. Molar Mass (g/mol) (CH3)2CO 58.05 C4H8O 72.12 ...
*February 16, 2010 by Angel *

**chemistry**

Determine the mass of NaCl in 1.0 L of 3.0 % by mass aqueous solution of sodium chloride. The density of the solutions is 1.10 gmL-1 please explain all the steps, thanks!
*December 8, 2010 by Stacy*

**math**

The volume of cube I is 331 m^3 less than the volume of cube II. If an edge of cube I is 10 meters, an edge of cube II is A. 14 meters B. 13 meters C. 12 meters D. 11 meters
*August 15, 2014 by Troy*

**Chemistry**

A newly discovered giant planet has an aver- age radius 12 times that of the Earth and a mass 722 times that of the Earth. Calculate the ratio of the new planets den- sity to the Earths density.
*September 14, 2010 by Daniel*

**physics**

The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. As shown is the figure, a polar bear climbs onto a piece of ice, which has a volume of 5.75 m3, and is floating in sea water. a) What is the mass of the piece of ice? b) What is the mass of the ...
*March 9, 2013 by Chris*

**Pre-Algebra**

Q: A building lot in a city is shaped as a 30 -60 -90 triangle. The side opposite the 30 angle measures 41 feet. a. Find the length of the side of the lot opposite the 60 angle. b. Find the length of the hypotenuse of the triangular lot. C.Find the sine, cosine, and ...
*June 22, 2014 by DArko*

**science**

An object measures 12 x 3 x 2.5 cm and has a density of 0.6 g/cm3. When it is placed in water, what is the volume of the part of the object that is above the surface of the water?
*September 19, 2011 by frankie*

**science**

An object measures 12 x 3 x 2.5 cm and has a density of 0.6 g/cm3. When it is placed in water, what is the volume of the part of the object that is above the surface of the water?
*September 25, 2011 by Anonymous*

**science**

An object measures 12 x 3 x 2.5 cm and has a density of 0.6 g/cm3. When it is placed in water, what is the volume of the part of the object that is above the surface of the water?
*September 25, 2011 by Anonymous*

**chemistry**

At 25 degrees celsius, the dimensions of a rectangular block of gold are 4.42 cm by 3.07 cm by 2.63 cm. The mass of the gold is 689g. I found that the density is 19.3g/cm^3 at 25 degrees but how will the density change if the temperature is increased to 125 degrees?
*September 30, 2010 by kate*

**physics torque and shelf**

When a wood shelf of mass 6.1 kg is fastened inside a slot in a vertical support, the support exerts a torque on the shelf. The board is 32cm wide by 3cm tall. the slot is 2 cm wide (3cm tall)on the lefthand side. So there are three vertical forces. A) Calculate the upward ...
*May 22, 2009 by kelsi*

**Physics**

A 65kg person's density is 990kg/m^3 with 2.4 L of air in lungs. What vol of air would the person have to expel to bring the density to that of water 1000 kg/m^3 (neglect the mass of air)?
*November 13, 2011 by Mily*

**Chemistry**

If the column of water in the water barometer fore to a height of 35ft, what would the atmospheric pressure be in mm Hg? mmH20X(density of water/density of Hg)= mmHg Density of water=0.99707 Density Hg=13.5340
*February 11, 2011 by Brian*

**Physics**

A cubical block of wood 0.100 m on a side and with a density 550 kg/m^3 of floats in a jar of water. Oil with a density of 750 kg/m^3 is poured on the water until the top of the oil layer is 0.035 m below the top of the block. 1. How deep is the oil layer? Please tell me the ...
*January 17, 2014 by Lisa*

**MATH**

1;The lengths of two sides of atrisngle are 12cm and 15cm.between what two measures should the length of the third side fall.
*August 17, 2012 by AMIT KUMAR*

**Math 7**

Suppose you copy a drawing of a polygon with the given size factor. How will the side lengths, angle measures, and perimeter of the image compare to those of the original? A.) 200% B.) 150% C.) 50% D.) 75%
*January 15, 2013 by Brandon*

**Chemistry**

Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves, lowering the temperature because of the following endothermic reaction. NH4NO3(s) + H2O(l) = NH4NO3(aq) H = +25.7...
*February 1, 2011 by Don*

**Chemistry**

A photon has a wavelength of 350 nm. Calculate the energy of the photon in joules
*November 6, 2010 by kevin*

**Calculus**

If the tolerance on the volume of a cube is a 2% error then what should the tolerance be fore each side? So what i did was V=x^3 dV = 3x^2 dx dV/V = 2% What should I do next? the answer is 2/3% but I don't know how it works. Thanks.
*November 3, 2008 by Andrew*

**maths**

When two cube of side 12 cm are joined end to end to form a cuboid then the total surface area of cuboid is
*November 30, 2012 by maihul*

**Chemistry **

Calcium can also be precipitated out of the solution by adding sodium phosphate (Na3PO4) to form solid calcium phosphate. A.) write a net ionic equation for this process B.)calculate the mass of this precipitate you would generate from treating 1.000 L of your unknown sample ...
*March 25, 2014 by Mai*

**Chem**

A 2.00 M solution of calcium choloride in water has a density of 1.17g/mL. What is the mole fraction of calcium chloride? How do I solve this? I know that density=mass/volume. The mm of calcium chloride is 111g/mol. I don't know how to connect this information.
*April 25, 2008 by Ginger*

**Chemistry**

How many atoms of mercury are present in 5.4 cubic cm of liquid mercury? The density of mercury is 13.55g/cc. mass Hg = volume x density Then convert to moles. Then remember there are 6.022E23 atoms for every mole. I still don't get how to do this! HELP ME!!!
*October 27, 2010 by Jessica*

**Chemistry**

An element has ccp packing with a face-centered cubic unit cell. Its density is 12400 kg/m3 and the unit cell volume is 5.50 x 10-29 m3. Calculate the molar mass (g/mol) of the element to three significant figures. Please explain how you come to the answer.
*February 9, 2010 by Luc*

**Chemistry **

In this lab experiment you will make 100.0 mL of a 0.100 M solution of Co(NO3)2. However you must calculate the number of moles of compound that will be needed (moles= Molarity x Liters).Then calculate the mass of Co(NO3)2 that will need to be weighed out (mass= moles x molar ...
*November 19, 2012 by Melissa*

**Thermochemistry, calorimetry**

The density of ice is 0.9168 g/cm3. The density of water is 0.9998 g/cm3. Calculate the difference between ΔU (internal energy) and ΔH (enthalpy) during the fusion of 2.5 moles of ice at atmospheric pressure.
*November 20, 2012 by Peter*

**AP Chemistry**

We were given a 12 cm by 12 cm area of aluminum foil (it weighed 0.60 g) and were told to calculate the atomic mass of Aluminum atoms given that the radius of 1 aluminum atom is 143 picometers and the density is 2.7 grams per centimeter cubed, without using Avogrado's number. ...
*November 15, 2012 by BadatChem*

**chemistry**

Common ion effect;At some other temperature, a solid sample of Ca(OH)2 is shaken with 0.0100? Common ion effect;At some other temperature, a solid sample of Ca(OH)2 is shaken with 0.0100 M CaCl2. Once equ? At some other temperature, a solid sample of Ca(OH)2 is shaken with 0....
*February 22, 2012 by Mahi*

**College Chemistry**

1) The concentration of the aluminum ion in a test solution is 0.10M. Using the Ksp for aluminum hydroxide (3. x 10^-34), calculate the concentration of hydroxide needed to precipitate aluminum hydroxide. From the concentration of the hydroxide, calculate the pH of the ...
*April 1, 2010 by Zach*

**physics**

Calculate the total force of the atmosphere acting on the top of a table that measures 1.9 m by 2.3 m.
*January 23, 2012 by B*

**chemistry **

an unknown element crystallizes in a face-centered cubic unit cell. with an edge length of 392.4 pm. The solid has a density of 21.09 g/cm^3. what is atomic weight of solid? so what i did was : FC cubic uit --> 4 atoms edge length--> l = 2*root2*r = 392.4 pm = 392.4 * 10...
*November 8, 2012 by Ania *

**math**

The perimeter of a triangle is 26 c,. Side a of the triangle is 3 cm longer than side b. Side c is 1 cm shorter than twice side b. Find the length of each side.
*February 4, 2010 by sara*

**Notation'**

write 8,350,000 in scientific notation my answer: 8.350 X 10^3
*May 11, 2012 by pls check*

**Math**

3. It takes 72 tiny cubes to fill an empty box. It is found that the volume of the box is 576 ml. Know that 1 cc = 1 ml. How long is the side of the tiny cube.
*August 29, 2012 by Elisabeth*

**Chemistry**

I am doing a lab online and have no clue on how to get started with the following questions? Please Help me! 1. Calculate and record the following (in grams): (a) mass of NaCl by subtraction of other components: (b) measured mass of NaCl after boiling away water: 2. Calculate ...
*October 23, 2010 by Melissa*

**math**

Referring to the figure, think about first picking a card and then rolling the die. Give the probability in simplest form. P(A, 1) = ____ the figure has 1 A,2 B, 3 C, and a 6 side cube. i am confused with this problem.. please help?
*April 5, 2012 by Cheril*

**chem**

assuming you have o.4g of Y(OH)3, calculate the mass of BaO2 required to react stoichiometrically to produce YBa2Cu3O7. Now calculate the mass of CuO. Please HELP! Write the balanced equation. Then, calculate the moles of Y hydroxide from .4 g. Then, notice from the balanced ...
*October 24, 2006 by nick*

**physics/chem**

the density of alumnium is 2.7 g/cm^3 and its molar mass is 27 g/mol. find the mass of an atom of aluminum and the numebr of alumuminum atoms per cubic meter.
*April 22, 2008 by billystar*

**Physics help?**

Calculate the acceleration if the bullet leaves the gun at 350 m/s. The length of the gun barrel is .40m.
*September 11, 2011 by AZ*

**math**

find the ratio of the volume of a sphere with a radius of 10 meters to the volume of a cube with a side of 10 meters
*September 9, 2011 by araceli*

**math (algerba 1)**

Right Angle Triangle: side A ? side B 3 square root side C 2m How would i find side a
*March 12, 2013 by Katea *

**chemistry**

calculate the molarity of 30.0g of NaOH in 350. mL of NaOH solution
*April 14, 2010 by Anonymous*

**Simple Harmonic Motion**

have performed an experiment of simple harmonic motion and the values I got Mass(g) Distance (m) 200 0.438 250 0.398 300 0.345 350 0.312 400 0.297 450 0.281 500 0.259 I would like to know how to calculate the spring constant... since I have been having weird values, if ...
*February 8, 2011 by Abi*

**Chemistry**

How much heat (kcal)is needed to melt 14 ice cubes? Each cube is at 0c and has a mass of 28grams.
*March 4, 2013 by Brittany*

**P**

Why is an ice cube at 0C more effective in cooling soft drink than the same mass of water at0C?
*December 1, 2013 by Anonymous*

**physics**

a vertical dock gate is 5m wide and is hinged at 1m from the base of the dock. the dock has sea water with density of 1025 kg /m^3 to a depth of 7.5 on one side and fresh water to depth of 3m on the other side a) find the resultant horizontal force b) Determine the overtunning...
*January 13, 2014 by moody*

**Chemistry II**

A solution of ethanol in water is prepared by dissolving 61.0 mL of ethanol (density = 0.79g/mL) in enough water to make 280.0 mL of solution. What is the molarity of the ethanol in this solution? definition of molarity = #mols/L. mass ethanol = m = volume x density = 61.0 mL ...
*April 16, 2007 by Jayd*

**AP Chemistry**

An aqueous sulfuric acid solution containing 571.6 g of H2SO4 per liter of solution at 20C has a density of 1.3294 g/mL. Calculate (a) the molarity, (b) the molality, (c) the percent by mass, and (d) the mole fraction of H2SO4 for the solution. (MM H2SO4 = 98.08; MM H2O = 18....
*January 5, 2010 by Beth*

**Chemistry**

When 100 mL of Ba(NO3)2 solution at 25 degrees Celsius is mixed with 100 mL solution CaSO4 solution at 25 degrees Celsius in calorimeter, the white solid BaSO4 forms and the temperature of the mixture increases to 28.1 degrees Celsius. Assuming that the calorimeter absorbs ...
*December 9, 2012 by Megan*

**physics**

A cube of balsa wood (side length = 0.25 m) is tied with a string to the bottom of a waterfilled container. The wood is completely immersed. What is the tension in the string?
*July 29, 2013 by samuel*

**physics**

A copper cube, 0.31 m on a side, is subjected to two shearing forces, each which has a magnitude F = 6.40 106 N (see the drawing). Find the angle θ (in degrees), which is one measure of how the shape of the block has been altered by shear deformation.
*April 3, 2013 by Dee*

**geometry**

in the digram below,prove that trianglel lmn is similar to trangle lopnafter ur proof, slove for the length of side mn(side lm=4,side Mo=8,and side op=15).
*May 16, 2012 by bishar*

**chem**

I am still having a little problem with my original question. However, this is what I have done so far. I am not sure what to do with the density of the solution of 0.78 g/mL. The answer I came up with is 5.47 mol/kg. I found the density of the water in grams then I converted ...
*February 13, 2011 by paula*

**chemistry needs another look plz**

Posted by Lori on Tuesday, December 14, 2010 at 5:38pm. The mole fraction of an aqueous solution of potassium perchlorate is 0.125. Assuming that the density of this solution is 1.20g mL-1, calculate the following: (A) the mass percent of potassium perchlorate in the solution...
*December 14, 2010 by Lori*

**Chemistry**

A 0.1873 g sample of a pure, solid acid, H2X was dissolved in water and titrated with 0.1052 M NaOH solution. The balanced equation for the neutralization reaction occurring is H2X(aq) + 2NaOH(aq) Na2X(aq) + 2H2O(l) If the molar mass of H2X is 85.00 g/mol, calculate the ...
*May 11, 2011 by Lauren*

**Math**

You have 12 square tiles,each tile measures 1 foot on each side,how many non congruent rectangles can you make ?,each rectangle must use ll 12 tiles
*March 12, 2013 by Tim*

**biology**

You find a male tribble with plaid fur. When you cross this male with a purebred solid blue female, all the offspring are solid blue. A cross between two of these F1 tribbles produces an F2 generation that is 3/4 solid blue and 1/4 plaid. All of the blue F2 tribbles are male. ...
*February 16, 2009 by Anon*

**Math**

Hello maam sir.. I have a problem in my assignment.. Im now a college studenta first year studentthis is my question..please help me.. I really need it now 1. The diameter of the earth is 7920 miles, and that of the moon is 2160 miles. Compare their volumes. 2. A pyramid ...
*May 6, 2010 by Mr. J*

**calculus**

The volume V of a cube with sides of length x in. is changing with respect to time. At a certain instant of time, the sides of the cube are 6 in. long and increasing at the rate of 0.3 in./sec. How fast is the volume of the cube changing at that instant of time?
*October 27, 2012 by Anonymous*

**AP Chem**

Would someone please check these for me? 52. In an experiment, you fill a heavy-walled 5.00-L flask with methane gas, CH4. If the flask contains 7.13 g of methane at 19 degrees C, what is the gas pressure? 2.14 atm 56. A 2.50-L flask was used to collect a 5.65-g sample of ...
*November 19, 2008 by Anna*

**calculus**

the base of a solid is a region in the first quadrant bounded by the x-axis, the y-axis, and the line y=1-x. if cross sections of the solid perpendicular to the x-axis are semicircles, what is the volume of the solid?
*February 20, 2008 by anonymous*

**Chemistry**

A 43.0 g sample of hydrated cobalt (II) sulfite is heated to drive off the water. The anhydrous cobalt (II) sulfite has a mass of 26.1 g. Calculate the mass of water. Calculate the moles of water. Calculate the moles of cobalt (II) sulfite. Calculate the mole ratio of water to...
*October 26, 2012 by Elizabeth*

**Geometry **

Triangle ABC is congruent to triangle XYZ . Angle A measures 50 , angle B measures (2x+40) and angle X measures (4x+8) . Find the value of x.
*July 18, 2011 by kim*

**Physics Help**

Charge is distributed uniformly along the x axis with density x and uniformly along the y axis with density y. Calculate the electric field at the points (a) r = a i + b j, and (b) r = c k.
*February 11, 2013 by Lindsey*

**Chemistry HELP!!**

Can you identify a metal if you know its density? Explain Do you think that determining the volumes of metal samples by measuring their dimensions and calculating would be more r less accurate than determining volumes by water displacement? Explain. Would measuring the ...
*August 29, 2006 by Dave*

**AP Chemistry**

You are given a small bar of an unknown metal X. You find the density of the metal to be 10.5g/cm3. An x-ray diffraction experiment measures the edge of the face-centered cubic unit cell as 4.09 A. (1A=10^-10m) Identify X.
*November 14, 2009 by Angie*

**chemistry - synthesis of aspirin**

wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid? If so, how do we find the mass of acetic acid in this experiment volume of acetic anhydride = 4 ml mass of acetic anhydride (...
*April 7, 2012 by Priscilla*

**GenChem II**

What mass of CsBr must be added to .500L of water to produce .4molality solution? What are mole fraction and mass percent? Here is my work and below I will post a question about it: 1 mol CsBr = 212.81g density of water = 1g/mL d=mv 1=x/500 x=500g of water --> solvent ....
*February 18, 2010 by Chem*

**Math**

One side of a triangular banner is 1 times longer than the second side and 2 cm shorter than the third side. The perimeter of the triangle is 98 cm. How long is the shortest side?
*March 2, 2014 by christian*

**Chem Lab Help**

Trial #1 Trial #2 Trial #3 Mass: gelatin capsule (g) .123 .118 .122 Mass: whole alka-seltzer tablet (g) 3.230 3.230 3.230 Mass: capsule + alka-seltzer sample (g) .822 .882 .677 Mass: system before reaction (g) 23.109 23.110 22.735 Mass system after reaction (g) 21.742 21.813 ...
*October 29, 2012 by Tyler*

**physics**

A 5-g ice cube at ?4C is dropped into 60 g of water at 40C. (For the following problems, use the specific heats in this table and the numerical data found in this table.) (a) After enough time has passed to allow the ice cube and water to come into equilibrium, what is the ...
*July 26, 2012 by lanre*

**pre-calculus**

Express the edge length of a cube as a function of the cube's diagonal length d. Then express the surface area and volume of the cube as a function of the diagonal length.
*January 12, 2014 by Christy*

**PHYS101**

A VENTURI TUBE IS USED TO MEASURE THE WATER SPEED V IN A PIPE BY COMPARING THE WATER PRESSURE IN THE WIDE AND NARROW SECTIONS(CROSS-SECTIONAL AREAS A, A=A/4).FIND V IF THE DIFFERENCE IN MECURY LEVEL IS h=25mm.(THE DENSITY OF MERCURY IS =13600Kg/meter cube)
*April 19, 2010 by KABELO*

**PHYS101**

A VENTURI TUBE IS USED TO MEASURE THE WATER SPEED V IN A PIPE BY COMPARING THE WATER PRESSURE IN THE WIDE AND NARROW SECTIONS(CROSS-SECTIONAL AREAS A, A=A/4).FIND V IF THE DIFFERENCE IN MECURY LEVEL IS h=25mm.(THE DENSITY OF MERCURY IS =13600Kg/meter cube)
*April 19, 2010 by KABELO*

**calculus**

The area enclosed between the x-axis, the curve y=x(2-x) and the ordinates x=1 and x=2 is rotated through 2π radians about x-axis. ( a)Calculate the volume of the solid revolution formed. (b)Calculate the rotating area.
*May 27, 2012 by shah*

**calculus**

The area enclosed between the x-axis, the curve y=x(2-x) and the ordinates x=1 and x=2 is rotated through 2π radians about x-axis. ( a)Calculate the volume of the solid revolution formed. (b)Calculate the rotating area.
*May 27, 2012 by fifi*

**math**

The voulme of fish tank with a square base is y^3-6y^2+9y cube inches. The hieght is Y. Find the length of a side of the square base. can some one help me please.
*June 7, 2010 by keaton*

**solid chemestry**

Knowing that the energy associated with the formation of 1 mole of vacancies in copper (Cu) is 104 kJ, determine the vacancy density (nv/cm3) in Cu at 1197 K. Assume the pre-exponential factor is one.
*November 17, 2013 by juanpro*

**gr 7 math**

This cube has five cubes along each edge. The faces are covered, but the cube is hollow inside. Can it be divided into two pieces of equal volume? Explain. I am not sure what this question is asking?
*April 2, 2008 by david*

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