Sunday

November 29, 2015
Number of results: 89,499

**physics**

Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 8.464 g, is pressed into a leaf of 5.036 ìm thickness, what is the area (in m2) of the leaf? (b) If, ...
*September 1, 2011 by jessica*

**physics**

Gold, which has a density of 19.32 g/cm^3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 6.710 g, is pressed into a leaf of 1.661 μm thickness, what is the area (in m^2) of the leaf? (b...
*January 26, 2011 by sagara*

**Sorry, Here's another question plus work**

1. Gold, has a mass of 19.32g for wach cubic centimeter of volume, is most ductile metal and can be pressed into a thin leaf or drawn out into long fiber. -If a sample of gold, with a mass of 27.63g is pressed into a leaf of 1.000micometers thickness, what is the area of the ...
*August 31, 2006 by krystal*

**Physics, Desperate Need of help!**

Gold, has a mass of 19.32g for wach cubic centimeter of volume, is most ductile metal and can be pressed into a thin leaf or drawn out into long fiber. -If a sample of gold, with a mass of 27.63g is pressed into a leaf of 1.000micometers thickness, what is the area of the leaf...
*August 31, 2006 by krystal*

**Chemistry**

Earth's oceans have an average depth of 3800 m, a total area of 3.63 108 km2, and an average concentration of dissolved gold of 5.8 10-9 g/L. (a) How many grams of gold are in the oceans? (b) How many cubic meters of gold are in the oceans? Assuming the price of gold is $392....
*August 25, 2013 by Anonymous*

**math**

A metal sphere has a mass of 1 kg. 1 cubic centimeter of this metal has a mass of 4.8 grams. find the radius. how do you work this out?
*September 22, 2014 by maya*

**Science **

Pure gold can be fashioned into elaborate masks and thin plates that can be incorporated into clothing.what physical trait of metal doea this demosnstrate
*December 12, 2014 by Luz*

**Chem**

Based on the number of atoms per unit cell and the mass of the atom, the mass of the unit cell can be calculated. The density of the unit cell and the material as a whole can be determined from the mass and the volume of the unit cell as. D= M/V The usual units of density are ...
*January 16, 2009 by Juliee*

**science**

Calculate the buoyant force in air on a kilogram of gold (whose density is about 19 grams per cubic centimeter). The density of air is 1.3 ✕ 10-3 grams per cubic centimeter. Remember that the buoyant force is equal to the weight of a volume of air that is equal to the ...
*August 2, 2014 by Zoey*

**arithmetic**

Sam wants to pack some candies into a box with a volume of 1.5 cubic meters. Each candy has a volume of 1 cubic centimeter. How many candies will fit in the box?
*May 21, 2012 by chezney chichester*

**chemistry**

A rectangular metal bar has a volume of 50.0 inches cubed.The Metal BaR weighs 1.42kg. Calculate the density of the metal in grams per cubic centimeter.
*October 12, 2009 by Kevin *

**Chemistry**

The density of pure gold is 19.3 g/centimeter cube. A quantity of what appears to be gold has a mass of 465 grams and a volume of 26.5 mL. Is the substance likely to be pure gold? please tell me how you got your answer. Thanks! density = mass/volume You know mass is 465 grams...
*February 15, 2007 by Sarah*

**Chemistry**

How do you do this? A block of metal measuring 3.0 cm X 4.0 cm X 5.0 cm has a mass of 470.0g. What is the density of the metal in grams per cubic centimeter?
*October 16, 2011 by Miranda*

**math**

a time capsule is in the shape of a cylinder with a hemisphere at each end. if the capsule is surrounded with a metal outer layer 4 cm thick as shown( there's a picture) then determine the volume of the metal outer layer. round your answer to the nearest cubic centimeter. the ...
*January 15, 2013 by mary*

**Physics please check**

The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace whose weight...
*April 9, 2007 by Mary*

**Chemistry**

The density of solid W is 19.3 g/cm3. How many atoms are present per cubic centimeter of W? As a solid, W adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of W? What is the volume of a unit cell of this metal? What is the edge length...
*January 18, 2013 by Anonymous*

**Science**

Metals can be hammered into thin sheets because they are___________? Its in a crossword puzzle and i thought it was ductile but that doesnt fit.
*March 5, 2008 by Emily*

**physics**

Water drips from a faucet into a flask at the rate of two drops every 3 seconds. A cubic centimeter contains 20 drops. What volume of water, in cubic decimeters will be collected in 1 hour?
*January 23, 2014 by Sara*

**physics**

Water drips from a faucet into a flask at the rate of two drops every 6 seconds. A cubic centimeter (cm3) contains 20 drops. What volume of water, in cubic decimeters (dm3), will be collected in 1 hour?
*August 19, 2012 by Anonymous*

**PHYsics URGENT**

a 7.0 kg object weighs 55 N when submerged and weighed in water. A) what is the value of the buoyant force of the water on the object b) what weight of water is displaced by this object? c) water weighs 0.0098 N per cubic centimeter. What volume of water (in cubic centimeters...
*October 20, 2015 by sammie *

**physics**

solid gold statue with mass of 7.55kg, weight of 74.0N, and disperses 680 cubic meters of water when immersed. i need to find the density. but im unsure how to find the volume first to put it into the formula?
*May 21, 2015 by christy*

**Chemistry**

a cube of metal has a mass of 1.45 kg. when the metal is placed into a graduated cylinder containing 356mL of water, the volume increases to 898 mL. calculate the density of the metal in g/mL
*July 2, 2013 by Colby*

**Physics, still don't get it!**

The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace whose weight...
*April 9, 2007 by Mary*

**math**

A samll bar of gold measures 40 mm by 25 mm by 2 mm. One cubic millimeter of gold weighs about 0.0005 ounce. Find the volume in cubic millimeters and the weight in ounces of this small bar of gold. Thank you!
*April 28, 2015 by Vanessa*

**CHemistry....Please help**

How would i calculate the density of Li2S in grams per cubic centimeter? I have to use the equation : density= mass/ volume: But i dont know how to find out the volume using the edge length of the unit cell which is 5.88* 10^2 pm.
*January 25, 2009 by Saira*

**physics honors**

Suppose that pure gold was to be made into a very long, thin wire for high-end stereo systems. (Gold is often used because it does not oxidize so it makes very good electrical contacts). If the gold wire was to have a radius of 0.01 cm, how long of a wire could you make from ...
*May 31, 2012 by thomas*

**CHEM******

Initial info: The atoms of crystalline solid pack together into a three-dimensional array of many small repeating units called unit cells. The simplest of the unit cells are those that have cubic symmetry, with atoms positioned at the corners of a cube. Atoms can also be found...
*November 30, 2007 by K*

**Pre-Calc**

Gold weighs 19.3 grams per cubic centimeter (cc), and silver weighs 10.5 grams per cc. A. Write a formula for the weight of one cc of a mizture of silver and gold in terms of the volume of gold in the cc. B. If one cc of mizture weighs 12.7 grams, what is the weight of gold in...
*November 11, 2009 by Tritanianna*

**Physics**

The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace whose weight...
*April 5, 2007 by Mary*

**Physics**

Suppose gold bars are made such that they are cubic. If they are made cubic, then there volume is given by V = L3, where L is the length of a side of the bar. The price of any gold bar is directly proportional to its volume, so the price of the gold is P = c V, where c is some...
*August 28, 2014 by Kimmy*

**Physics**

Suppose gold bars are made such that they are cubic. If they are made cubic, then there volume is given by V = L3, where L is the length of a side of the bar. The price of any gold bar is directly proportional to its volume, so the price of the gold is P = c V, where c is some...
*August 31, 2014 by Physics Help*

**chemistry**

A 6.50 g piece of substance B was rolled out into a thin sheet measuring 24.0 cm x 18.0 cm. a.) Calculate the volume of the sheet of metal. Show work; use labels. [I also had to look at a graph, here is some information about substance B: y=mx+b m(slope): 8.52 g/cm^3 b(Y-...
*February 15, 2011 by Taylor*

**English**

Can you please check the following sentences? I really hope you can have a look at them. 1) The King of Sicily gave a jeweller some gold and asked him to make a crown from it. In order to make sere the jeweller used only gold (?), the king went to ask Archimedes for help. 2) ...
*October 14, 2010 by Franco*

**English **

Read the poem and answer the following question. Nature's first green is gold, Her hardest hue to hold. Her early leaf's a flower But only so an hour. Then leaf subsides to leaf. So Eden sank to grief. So dawn goes down today, Nothing gold can stay. How would you describe the ...
*August 31, 2011 by Cheyenne*

**chem.**

it's value for gold is 19 grams per cubic centimeter
*October 29, 2008 by sandi*

**chemistry**

I dont even know where to begin to solve this problem please help A 6.5 g piece of copper was rolled out into a thin sheet measuring 24.0 cm x 18.0 cm. The density of copper is 8.90g/cm3 1. Calculate the volume of the sheet of metal 2. Calculate the thickness of the sheet of ...
*January 25, 2009 by Jennafer*

**chemistry**

the metal gold, with an atomic radius of 144.2pm crystallizes in a face-centered cubic lattice. what is the density of gold?
*April 22, 2014 by Anonymous*

**physics**

A cube of lead measuring 1 meter on each side is thrown into the ocean. Determine the buoyant force acting on this mass of lead. The density of lead is 11.4 grams/ cubic centimeter
*March 8, 2012 by sierra*

**math 2**

max packs cereal boxes into a larger box the volume of each cereal box is 175 cubic inches. which is the best estimate for the volume of the large box? would the answer be it be 210 cubic inches, 420 cubic inches, 2,100 cubic inches, or 4,200 cubic inches?
*March 6, 2014 by kimmy plus*

**Question**

There's this object I don't know what its called: It is made out of metal the metal is shaped into a circle (empty in the middle) with another metal pieced into a triangle (empty in the middle) that is attached to the circle with these two loops with another circle attached to...
*May 29, 2010 by Amy~*

**Lang Arts**

Have you read this book called the outsiders well i need to do an oral presentation on it Here is a poem i need to know how this poem relates to the story and some other details with evidence from the story. Poem: Nothing Gold Can Stay Natures first green is gold Her hardest ...
*September 29, 2008 by Kenny*

**Lang Arts**

Have you read this book called the outsiders well i need to do an oral presentation on it Here is a poem i need to know how this poem relates to the story and some other details with evidence from the story. Poem: Nothing Gold Can Stay Natures first green is gold Her hardest ...
*September 29, 2008 by Kenny*

**7th grade math**

What feature of a cylinder uses the given units? a. centimeter b. square centimeter c. cubic centimeter Please help! Thank you!
*September 24, 2011 by saranghae12*

**Math**

If 241.5 grams of gold has a volume of 12.5 cubic centimeters, what is the density of gold?
*January 8, 2013 by Camma Breezy*

**physical sciences**

If 57.9 grams of gold has a volume of 3 cubic centimeters what is the density of gold in g/ cm3,?
*April 26, 2012 by kl*

**Chemistry**

The Densities of Liquids and solids O.k. so here is my problem. I will give you the whole problem just incase my mistake is somewhere else, but the volume for the metal and the density for the metal in the end seem to be wrong. (Density of unknown liquid) Mass of empty flask ...
*August 22, 2007 by Sara*

**chemistry**

The mass of one penny is 2.51 grams and its volume is 0.40 cubic centimeter. The density in g/ml of this penny is
*August 31, 2011 by Anonymous*

**Chemistry**

A 45.4 grams of a gold metal sample was heated with the amount of energy of 228 J. Which of the following would the most plausible temperature change of the gold sample? The specific heat of gold is 0.131 J/g.oC. 12.8 oC to 38.3 oC 24.4 oC to 81.6 oC 23.8 oC to 62.1 oC 38.3 oC...
*February 28, 2015 by Heather*

**chemistry**

An aluminum engine block has a volume of 4.86 L and a mass of 12.75 kg. What is the density of the aluminum in grams per cubic centimeter?
*August 26, 2010 by maryanne*

**Math**

Hannah plans on going hiking most of the day. It is recommended that she takes at least 3 liters of water with her. She packed 3 water bottles. The bottles she brought are cylinders with a radius of 3cm and a height of 30cm. What is the volume of one bottle to the nearest ...
*November 12, 2013 by Elle*

**metric system**

say you have a level container that is 10cm by 10cm by 10cm. full of water, it would weight one kg. but say you can put no more than 400g into it. say you have only a metric ruler to determine this. how high can you fill the container? my partial answer: i am not sure at all ...
*June 20, 2010 by amy*

**math**

A large cylinder has a volume of about 5,400 cubic cm. A small cylinder is similar in shape to the larger cylinder with a scae factor of 2/3.Which measurement is closest to the volume of a cylinder. f)1600cubic cm g)2400 cubic cm h)2700 cubic cm j)3600 cubic cm The answer is ...
*March 19, 2013 by Courtney*

**Chemistry**

mass of empty flask with stopper = 32.634 g mass of flask with water and stopper = 59.479 g density of the water = 0.9973 g/cm^3 mass of water = 26.845 g volume of water = 26.918 cm^3 the flask is then emptied and an unknown substance is added mass of flask with new liquid and...
*October 16, 2007 by Vanessa*

**physics**

A prospector finds a solid rock composed of granite ( = 2650 kg/m3) and gold. The volume of the rock is 3.05 10-4 m3 and its mass is 3.57 kg. What mass of gold is contained in the rock? I thought that I could used some ratio, but I have no idea how. Our teacher hasn't even ...
*June 19, 2007 by JJ14*

**Calculus**

If water is poured into a cup at a rate of 1 cubic centimeter per second, how fast is the dept of the water increasing when the water is 4 cm deep? r = 6 cm h = 9 cm V = 1/3(pie) r^2 x h V = (pie)r'h + 1/3 (pie)r^2 h' 6 / 9 = r / h 6h = 9r r = 3 / 4.5 h V = 1/3(pie) (3/4.5h)^2...
*February 6, 2011 by Katie*

**chemistry**

so this problem tells me to find the thickness of one atomic layer of gold using the volume occupied by one gold atom (1.73*10^-23) which i found from the previous problem idk but is thickness the same as volume? from the previous question it also gives me the density of gold ...
*September 3, 2011 by Henry*

**CHEMISTRYYYY HELP**

A sample of gold ore contains 22.0 g of gold metal per 100kg of ore. If gold has a market value of $350.00 per oz., what mass of ore, in tons, must be refined to get one million dollars worth of pure gold?
*September 26, 2011 by Andrea*

**Physics**

One cubic meter of granite has a mass of 2.70E3 kg, and one cubic meter of gold has a mass of 1.93E4 kg. Find the radius of a granite sphere whose mass is the same as that of a gold sphere of radius 1.07 cm. Any help is appreciated!!
*September 18, 2007 by Jade*

**Chemistry**

A 40.0g sample of an unknow, yellowish-brown, pure metal was heated to 62degrees Celcius and put into a coffee cup calorimeter containing 85.0g of watera at 19.2 degrees Celcius. The water was heated by the hot metal to a temperature of 21.0 degrees Celcius. What is the ...
*September 24, 2010 by Kelly *

**Chemistry**

A 40.0g sample of an unknow, yellowish-brown, pure metal was heated to 62degrees Celcius and put into a coffee cup calorimeter containing 85.0g of watera at 19.2 degrees Celcius. The water was heated by the hot metal to a temperature of 21.0 degrees Celcius. What is the ...
*September 24, 2010 by Kelly *

**science**

a sample of metal has a mass of 94.5 grams and a volume of 7 cubic centimeters. what is its density?
*September 12, 2011 by zeke*

**Factoring Polynomials (need HELP!!!)**

Ok, this is pretty long, so bear with me. The problem says: The diagram (not shown here, sorry) shows a cube of metal with a cylinder cut out of it. The formula for the volume of a cylinder is V=pi*r^2*h, where r is the radius and h is the height. The cube's length, width, and...
*January 10, 2007 by Emily*

**Thank you Ann (kinematics)**

Thank you Ann! I had the equations and really was closing in on the answer... (stopping for 23 s is what really got me confused) in either case, the displacement for a) is 888 m ! Now I'll try to calculate (b). Thank you much! P.S. This is in response to my earlier physics (...
*January 31, 2007 by eric (new chem or physics prob. in)*

**physics**

A leaf frozen into a pond in winter is 40mm below the surface of the ice. How far does the leaf seem to be ?(n=1.31)
*March 22, 2013 by Susan*

**Chemistry **

The density of solid Cr is 7.15 g/cm3. How many atoms are present per cubic centimeter of Cr? As a solid, Cr adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of Cr?
*February 19, 2013 by Stephanie*

**Math**

If 1,200 cm^2 of material is available to make a box with a square base and an open top, find the maximum volume of the box in cubic centimeters. Answer to the nearest cubic centimeter.
*March 6, 2015 by Gary*

**English**

Posted by rfvv on Monday, October 4, 2010 at 2:24am. 1. Cut long rice cake into 4-5 cm pieces. (How do you read '4-5 cm'?) 1-1. four to five centimeter 1-2. four and five centimeter 1-3 four or five centimeter 1-4 from four to five centimeter (Which one is right? Do we have to...
*October 4, 2010 by rfvv*

**chemistry**

Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Find the mass of the gold salt that forms when a 73.0 -g mixture of equal masses of all three reactants is prepared.
*November 2, 2010 by john*

**Physical Science**

A sample of copper can be drawn into thin wire. Is this chemical or physical property?
*September 9, 2008 by Mari*

**Math**

A rectangle solid is 10.0cm long ,8.1cm wide and 2.7cm tall. The mass of the rectangular solid is 36g What is the density hi Density = mass/volume D = 36/(10 * 8.1 * 2.7) Your answer should be in terms of grams per cubic centimeter. I hope this helps. Thanks for asking.
*July 23, 2007 by Mason*

**physics**

(a) Assuming that each cubic centimeter of water has a mass of exactly 1 g, find the mass of 3.76 cubic meter of water in kg. (b) Suppose that it takes 10.4 hours to drain a container of 59.1 m^3 of water. What is the “mass flow rate,” in kg/s, of water from the container?
*January 26, 2011 by sagara*

**Chemistry**

HELP!!! An unknown metal having a mass of 14.00g is dropped into 11.00mL of water at 20.0 degrees Celcius. The starting temperature of the chunk of metal is 100.0C. The final temperature of the water and metal is 32.5C. What is the specific heat of the metal?
*April 6, 2011 by Marie*

**chemistry**

a metal crystallizes in the face centred cubic cubic crustal structure with a unit cell edge of 5.48 x10 power of -8 cm.the density of the metal is 6.90g per cubic cm. a. what is the mass in grams, of a single atom of this element. b. what is the atomic weight of the element (...
*December 4, 2011 by amanda*

**Physics (check)**

A merchant in Katmandu sells you a solid gold 1-kg statue for a very reasonable price. When you get home, you wonder whether or not you got a bargain, so you lower the statue into a measuring cup and measure its volume. What volume will verify that it's pure gold...
*May 18, 2008 by Emily*

**Chemistry**

The diameter of a hydrogen nucleus is 1.0 X 10 -3 pm and its mass is 1.67 X 10 -24 g. What is the density of the nucleus in grams per cubic centimeter? Assume the nucleus is a sphere with volume = 4/3pie r3.
*July 4, 2015 by Kristina*

**Physics**

Useful Constants: 1 Torr = 133.32 Pa; R = 8.3145 J/mol·K You have a thin metal sphere of unknown volume that contains helium gas at low pressure. You put the entire metal sphere into a bath of liquid nitrogen, and a pressure gauge on the sphere indicates a pressure of 288 torr...
*November 16, 2009 by Ellie*

**science**

why is copper used for electrical wiring? The have writen 'Copper is a good conductor of electricity.' Is this correct? Yes, copper is a good conductor of electricity. It also is ductile (easily drawn into wires) (extruded), copper ore is realitively plentiful, etc.
*April 1, 2007 by sean*

**Physics **

can someone check? Which has greater volume: 1 kg of gold or 1 kg of water? a. The gold has greater volume. b. The water has greater volume. c. Gold and water have the same volume. Is it a? I know it's not b. The stones in an arch are . . . a. rarefied b. torqued c. under ...
*November 12, 2011 by Lisa*

**Chemistry**

A metal bar having a mass of 212 g is heated to 125.0°C and then dropped into 375 g of water at 24°C. After a while the temperature of the water and the metal is 34.2°C. If the specific heat of the metal is 0.831 J/g°C, how much heat did the metal lose?
*September 13, 2014 by El*

**chemistry**

Gold has a density of 19.3 g/cm3. Do you think you could carry 1.30 cubic ft (rhetorical--don't answer)? How many pounds does 1.30 cubic feet of gold weigh? [453.6 g = 1 lb, 2.54 cm = 1 in, and 1 ft = 12 in.]
*September 14, 2013 by Patrick*

**physics**

A metal ball of mass 1.8 kg with initial temperature of 46.5 C is dropped into a container of 3 kg of water at 15 C. If the final temperature is 22.6 C, what is the specific heat of the metal? metal = ____ J/kg*C?
*May 4, 2014 by john*

**Science**

Calculate:what is the density of a metal block that has a mass of 750 grams and a volume of 55 cubic centimeters?
*October 12, 2011 by Faith*

**science**

If an element has a gray luster and can be drawn into a wire, is it a nonmetal, metal, gas, or an alloy?
*May 19, 2010 by sue*

**chemistry **

a copper sample has a mass of 44.65 g and a volume of 5.0cm^3. what is the density of copper, expressed as gram per cubic centimeter? can you please write the formula then show the working? thank you really appreciate it
*August 27, 2012 by help3*

**Physics**

Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold particle by packing ...
*February 23, 2010 by kat*

**science**

Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold particle by packing ...
*February 23, 2010 by kat*

**chemistry**

Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold particle by packing ...
*February 23, 2010 by kat*

**Chem**

A 28.3 g piece of unknown metal is dropped into a graduated cylinder that has an initial volume of 14.2 mL. If the final volume of the cylinder is 16.7 mL, determine the identity of the unknown metal from its density.
*September 17, 2014 by Jessica*

**Science: Chemistry**

1. The element gold, Au, has a face-centered cubic structure. (Density - 19.3 g/cm^3) (a) What are the # of gold atoms in 1 unit cell? (b) What are the # of unit cells in 1 mol? (c) What is the volume of 1 mol gold unit cells? (d) What is the volume of 1 unit cell? (e) what is...
*November 8, 2014 by Supriya*

**Chemistry**

1. The eleent gold, Au, has a face-centered cubic structure. (Density - 19.3 g/cm^3) (a) What are the # of gold atoms in 1 unit cell? (b) What are the # of unit cells in 1 mol? (c) What is the volume of 1 mol gold unit cells? (d) What is the volume of 1 unit cell? (e) what is ...
*November 8, 2014 by Supriya*

**Chemistry**

A metal bar having a mass of 212 g is heated to 125.0°C and then dropped into 375 g of water at 24°C. After a while the temperature of the water and the metal is 34.2°C. If the specific heat of the metal is 0.831 J/g°C, how much heat did the metal lose? Please help me! Thank ...
*September 13, 2014 by Ellie*

**chemistry**

Archimedes used density along with mass and volume of alloys (mixtures) of gold and silver to determine the percent of gold (and also silver) in these alloys by simple, non-destructive measurements. Prove that the mass of gold in a given mass of silver alloy is given by the ...
*September 26, 2011 by mitchell*

**physics**

one gram of gold can be drawn into a wire 2.25 km long. What is the resistance of such a wire at 20°C?
*October 17, 2011 by Anonymous*

**CALCULUS**

A PIECE OF SHEET METAL IS 2.6 TIMES AS LONGS AS IT IS WIDE. IT IS TO BE MADE INTO A BOX WITH AN OPEN TOP BY CUTTING 3-INCH SQUARES FROM EACH CORNER AND FOLDING UP THE SIDES. IF THE VOLUME OF THE BOX MUST BE BETWEEN 600 AND 800 CUBIC INCHES, WHAT VALUES OF X WILL PRODUCE THIS ...
*July 24, 2008 by diana*

**English**

1. Cut long rice cake into 4-5 cm pieces. (How do you read '4-5 cm'?) 1-1. four to five centimeter 1-2. four and five centimeter 1-3 four or five centimeter 1-4 from four to five centimeter (Which one is right? Do we have to read 'centimeters'?)
*October 4, 2010 by rfvv*

**Chemistry**

hmmm...I just can't seem to get it. It looks like I got it right up to the volume of the metal point. Don't I have to divide the mass of the metal by the density of the water given before? (0.9970)? I guess I am having a problem with this which results in the wrong answer for ...
*August 22, 2007 by Sara*

**Physics (density)**

A steel drum (barrel) has a volume of 200 Liters and a mass of 16 kg. It is filled to the top with an unknown liquid, sealed and thrown into water. It is floating with 50% of its volume underwater. What is the density of the liquid inside the drum? Assume the walls of the drum...
*September 22, 2015 by Jason*

**Chemistry **

The coinage metals -- copper, silver, and gold -- crystallize in a cubic closest packed structure. Use the density of gold (19.3 g/cm3) and its molar mass (197 g/mol) to calculate an approximate atomic radius for gold. Work So Far: {[1/(19.3x197)]x.74}/6.022e23 =3.2319e18 [(3....
*February 3, 2015 by Caroline*

**L.A**

Could someone help me interpret this poem?Thanks Nature's first green is gold, Her hardest hue to hold. Her early leafs a flower; But only so an hour. Then leaf subsides to leaf. So Eden sank to grief, So dawn goes down to day. Nothing gold can stay. -Robert Frost All I can ...
*May 3, 2010 by Shadow*

**Physics**

A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 14.8 kg and 1.89 × 10-3 m3. The density of gold is 19 300 kg/m3, and the density of quartz is 2660 kg/m3. Find the mass of the gold in the rock.
*November 22, 2010 by Mike*