# why was it important to cover each beaker with a piece of aluminum foil?

15,221 questions, page 11
1. ## alegebra

a 210 ft. long rope is cut into 3 pieces. the first piece of rope is 3 times as long as the second rope. the 3rd piece of rope is 2 times as long as the second piece of rope. What is the lenght of the longest piece of rope?

asked by jane on March 18, 2011
2. ## Career

1. A job objective should: (1 point) A.)Persuade the reader to hire you B.)State the position you are applying for C.)List your work history D.)Give reference information 2.)The second paragraph of a cover letter is your chance to: (1 point) A.)state why

asked by YRN DJ on December 8, 2015
3. ## chemistry

Bill finds an unusual object and wishes to calculate it's density. He discovers a problem of accurately weighing it, because it won't stay on the weighing pan. To solve this he adds the object to a beaker containing 161 mL of distilled water and finds the

asked by Sam on September 7, 2009
4. ## Math

Gina cut a piece of ribbon into 3 equal pieces. Then she cut off 2 inches off one piece to make it 3 inches. How long was the original piece of ribbon?

asked by Alyssa on January 30, 2013
5. ## Math

A 26 inch ribbon is cut into three pieces. One piece is 12 inches. The remaining two pieces must have one piece two inches longer than the other. How long is the shortest piece of ribbon?

asked by Iris on January 27, 2011
6. ## Physics - Buoyancy

A sphere of mass of m = 1.69 kg is first placed directly on the plate of an electronic scale. The scale shows 16.58 N as the weight of the object. A large beaker containing a liquid with a density of 783 kg/m^3 is then placed on the scale and the scale is

asked by Kid on October 23, 2017
7. ## Physics

A sphere of mass of m = 1.69 kg is first placed directly on the plate of an electronic scale. The scale shows 16.58 N as the weight of the object. A large beaker containing a liquid with a density of 783 kg/m^3 is then placed on the scale and the scale is

asked by Kid on October 25, 2017
8. ## math

Solve by reverse FOIL: 14x^2+48x+18=0

asked by shonye on February 13, 2013
9. ## science

How would you find the thickness of a peice of gold foil.

asked by Anonymous on September 4, 2012
10. ## Geometry

Hi I was having some problem with this question, its been a while since I had been in geometry. I think you foil, but Im not sure. Solve for X. 2(x+4)(x+3)= 3(x+2)(x-1)

asked by George on December 11, 2016
11. ## English

Is Mercutio a foil to the Nurse? I think they are not, but can you please check my answer? Thanks

asked by Sarah on April 3, 2016
12. ## calclus

Chemistry teachers love to have different shaped beakers in their classroom (I guess it makes the classroom look for impressive). Different shaped beakers result in different rates the water level rises. Task: Determine the rate in which the water level

asked by sarah on May 16, 2018
13. ## math

I have a flat piece of plywood that measures 45 inches in width and 75 inches in length. I want to cut the board into identical square pieces with the integer side lengths and use the entire piece of wood. What are the dimensions (width & length) of each

asked by He who should not be named on March 27, 2014
14. ## French

Read the article and decide whether each statement that follows refers to the first piece of advice, the second piece of advice, both pieces of advice, or neither one. Des conseils pour les fêtes: 1. Tes amis sont très généreux cette année. Tu reçois

asked by Anonymous on March 9, 2016
15. ## algebra 1

a 100- foot cable is cut into two pieces.the first piece is 18 ft longer than the second. how long is each piece

asked by julie on January 6, 2011
16. ## mathematics 1

A piece of wire 27/32 inch in length is cut into 3 equal pieces. how long is each piece?

asked by Anonymous on October 1, 2007
17. ## algebra

a 60 inch string is cut in 2 pieces, the first piece is 6" longer than twice the second piece, find th elength

asked by Mayi on September 30, 2013
18. ## Math

A piece of wire 27/32 inches in length is cut into 3 equal pieces . How long is each piece 27/32 , 3/1 =81/32 =27 Is this right

asked by Weslee Clark on January 27, 2015
19. ## Physics

Why will the escape of neutrons be proportionally less in a large piece of fissionable material than in a smaller piece?

asked by Lee on April 25, 2008
20. ## Math

A support beam 15 m long is cut into two piece, the lengths of which are in the ratio of 2 to 3. What is the length of each piece?

asked by Walter Williams on December 3, 2012
21. ## Materials Science

A materials scientist is working on developing a dispersion-hardened aluminum alloy. What is the minimum surface energy required for the dispersion particles to induce dislocations to be pinned at the particles, and bow out around them, rather than to cut

asked by shohag on November 26, 2018
22. ## math

my mother divided 5 metres of ribbon into 8 equal piece . what is the length of each piece

asked by hanit on June 28, 2017
23. ## Music

I just composed a song and I need it on a music piece. I need help. I can supply the tonic solfa and would only need it in a piece. Thanks.

asked by Toluene on April 30, 2010
24. ## essential mathematics

A piece of wire 27/32 inch in length is cut into 3 pieces. how long is each piece?

asked by Anonymous on September 8, 2007
25. ## physics

is the force of gravity stronger on a piece of iron than on a piece of wood, if both have the same mass?

asked by Lee on November 7, 2008
26. ## math asap

if a 40 m rope is cut into two pieces in the ratio 3 : 5, how long is each piece? i tried: x=one piece 3/5 = x/40 x= 3*40/5 x=120/5 x=24 is that right?

asked by Andrew on October 23, 2014
27. ## math

If i have a piece of pipe that is half a yard long and it's divided into 5 pieces what is the length of each piece in yards?

asked by joshua on February 13, 2013
28. ## math

an 8 ft. piece of board must be cut from a 10 ft. two-by-four. allowing 0.125 ft. for the saw blade, how many inches long is the remaining piece?

asked by jeremy on January 25, 2017
29. ## math

Justin cuts a piece of wood measuring 5 3/8 inches into two equal pieces how long is each piece

asked by Jill on September 12, 2012
30. ## math

when a piece of a circle is determined by two radii, that piece is best called a A sector B circumference C remainder D chord

asked by zaira on October 27, 2008
31. ## math

A 120-foot long rope is cut into 3 pieces. the first rope is twice as long as the second piece of rope. the third piece of rope is three times aS LONG AS THE SECOND PIECE OF ROPE. WHAT IS THE LENGTH OF THE LONGEST PIECE OF ROPE? a 20 feet b 40 feet c 60

asked by eva on April 7, 2010
32. ## chemistry

write and balance Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide and carbon dioxide gas

asked by tamara on March 27, 2013
33. ## Algebra

A box is to be formed from a rectangular piece of sheet metal by cutting squares measuring 5 inches on a side and then folding the sides. The piece of sheet metal is twice as long as it is wide. If the volume of the box is to be 1760 in^3, what are the

asked by Terry on December 17, 2014
34. ## Physics

As you hurry to catch your flight at the local airport, you encounter a moving walkway that is 85 m long and has a speed of 2.2 m/s relative to the ground. If it takes you 68 s to cover 85 m when walking on the ground, how long will it take you to cover

asked by Anon on September 23, 2014
35. ## Chem in relation to Beuatiful's question

The question says Sufuric acid reacts with Aluminum hydroxide by double replacement. I have the reactant side I just need the product side because I need to know does aluminium replace Hyrdrogen, really confused hydroxides react with acids to form a salt

asked by Ms. J on February 25, 2007
36. ## Math

Maria wants to cover the box shown below with paper.Which of the following could be the dimensions of the paper so that Maria has enough to cover the box, including the ends, with a little left over? Shape: Rectangular Prism Length:8 in Width: 2 in Height:

asked by Sally on May 4, 2016
37. ## math

Maria wants to cover the box shown below with paper.Which of the following could be the dimensions of the paper so that Maria has enough to cover the box, including the ends, with a little left over? Shape: Rectangular Prism Length:8 in Width: 2 in Height:

asked by Larry vandermark on May 5, 2016
38. ## Math

Maria wants to cover the box shown below with paper.Which of the following could be the dimensions of the paper so that Maria has enough to cover the box, including the ends, with a little left over? Shape: Reactangular Prism Length:8 in Width: 2 in

asked by Sally on May 4, 2016

Maria wants to cover the box shown below with paper.Which of the following could be the dimensions of the paper so that Maria has enough to cover the box, including the ends, with a little left over? Shape: Rectangular Prism Length:8 in Width: 2 in Height:

asked by Sally on May 10, 2016
40. ## Math

Ram wants to cover the floor of a room 5meter wide & 8meter long by squared tiles. If each square tile is of side 0.5 meter, then find the number of tiles required to cover the floor of the room.

asked by Megha on November 4, 2016
41. ## math

bob wants to cover the floor of a room 3m wide and 4m long by squared tiles. if each square tile is of side 0.5m,then find the number of tiles required to cover the floor of the room.

asked by apekshita on February 23, 2015
42. ## Math

The image on a movie poster was shrunk to make the DVD cover art for the movie, so that the cover art is a scale image of the poster. The poster is 36 inches wide, and the DVD cover art is 6 inches wide. If the diagonal of the poster is 4.5 feet, what is

asked by Anonymous on January 21, 2014
43. ## Algebra

A piece of yarn is cut into two parts. If one of the resulting pieces is M inches long, represent the length of the other piece.

asked by Danielle on September 27, 2017
44. ## math

David has a hose that is 27 ft long. He wants to cut it into two pieces so that the longer piece is 3 ft more than 2 times the length of the shorter piece.

asked by k on October 27, 2014
45. ## Algebra

debbie anderson cuts a piece of wood measuring 3 3/8 inches into two equal pieces. How long is each piece?

asked by Jay on January 9, 2017
46. ## Physics

An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of

asked by Haley on February 27, 2011

An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of

asked by Em on February 27, 2011
48. ## Science

I have 59.73 grams of a solid dissolved into water. The total is now 115ML of water. I added the water into a beaker already containing said solid. I did not measure how much water I put into the beaker. 59.73g/115ML=0.51g/ML My question is. Is this the

asked by Dave on June 11, 2015
49. ## science

1. What weight of aluminum may be obtain from 1 kg of aluminum oxide? 2. how many liters of hydrogen would be form by the reaction of 25g of hydrochloric acid and sufficient quantity of zinc? 3. 0.82l of an unknown gas at 35 degree Celsius and 80 cm-Hg

asked by josh on August 27, 2011
50. ## Math

Paul wants to plant seeds in his circular vegetable garden that has a diameter of 20 feet. Each bag of seeds cover 10 feet^2. How many bags will he ned to cover his entire garden?

asked by Anonymous on April 4, 2016
51. ## Physic

Assume all temperatures to be exact. An aluminum spoon at 84 degree C is placed in a Styrofoam cup containing 0.180 kg of water at 12 degree C. If the final equilibrium temperature is 21 degree C and no heat is lost to the cup itself or the environment,

asked by Alice on May 6, 2011
52. ## Physics

A block of aluminum that has dimensions 2.07 cm by 2.55 cm by 5.00 cm is suspended from a spring scale. The density of aluminum is 2702 kg/m^3. (a) What is the weight of the block? 0.699 N (b) What is the scale reading when the block is submerged in oil

asked by Maryam on April 10, 2012
53. ## chemistry

Aluminum metal reacts with oxygen gas (O2) to form aluminum oxide. a. Write a balanced equation for this oxidation-reduction reaction. (In this problem you need not worry about the physical state of the reactants or product.) 2Al+3O2=2Al2O3 b. which

asked by krystal on February 14, 2012
54. ## math

a 59 centimeter piece of rope is cut into two pieces. If one piece is x centimeters long, express the other length as an algebraic expression in x.

asked by billy on February 25, 2011
55. ## math

Sheila is going to divide a 36-inch piece of ribbon into 5 equal pieces.She says each piece will be 7 inches long.whats the error?

asked by bob on November 12, 2013
56. ## math

Please anyone to help me solve this question A piece of copper wire is 52 2/3 m long. If each piece has been cut of 3/4 m from it. What length will remain after cutting pieces?

asked by kelvin on July 22, 2018
57. ## Math

When a piece of the circle is determined by two radii, the piece is best called a ____? a. sector b. circumfrence c. remainder d. chord I believe the answer is B

asked by Jen on September 24, 2008
58. ## math

Please anyone to help the solution and the answer# A piece of copper wire is 52 2/3 m long. If each piece has been cut of 3/4 m from it. What length will remain after cutting pieces?

asked by kelvin on July 23, 2018
59. ## science

Explain how the chemical compounds that were once in a piece of granite exposed on the top of a mountain may today be found in a piece of basalt.

asked by Bartek on January 30, 2015
60. ## Algebra

How do you solve this factoring problem by foil method: 25x2=16

asked by Kate on November 28, 2009
61. ## Math help

How is multiplying radical expression similar to FOIL with binomials?

asked by grace on October 16, 2017
62. ## Algebra HELP

How is multiplying radical expression similar to FOIL with binomials?

asked by grace on October 15, 2017
63. ## Math

8-i/2+3i write complex # in standard form. I know to FOIL, not sure if I did it right, I got -13/4-9i then I'm not sure what to do next or if I'm done...so lost can anyone help me?

asked by Karen on January 18, 2015
64. ## Algebra

Use the foil method to find the product. (4x^6-7)(x^8-4) this is the answer that I got:4x^14-7x^8-16x^6+28

asked by Anne on July 1, 2008
65. ## science

What did Rutherford's gold foil experiment give proof of?

asked by kayla on December 13, 2008
66. ## Algebra HELP

How is multiplying radical expression similar to FOIL with binomials?

asked by grace on October 16, 2017
67. ## Math NEED HELP URGENT

How is multiplying radical expression similar to FOIL with binomials?

asked by grace on October 16, 2017
68. ## 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.

asked by kat on February 1, 2009
69. ## Chemistry

Can you help me with the explaining and identifying below? A found a link in which the lab is similar to what I did in class. Here it is: icn2. umeche. maine. edu /newnav /NewNavigator /Labs /Deter_1493.htm thanks for the help! Indicate whether the

asked by Anonymous on July 11, 2008
70. ## physics

a piece of iron has a temperature of 18 degrees celsius. A second identical piece of iron is twice as hot. What is the temperature of the second piece of iron? Please explain why.

asked by Sonia on December 13, 2010
71. ## Chemistry

Iron (III) Oxide reacts with Aluminum to form Aluminum Oxide and Iron. If I have 255 g of Aluminum and unlimited Iron (III) oxide, how many grams of Iron will form? I am really not sure how to work with this. What does it mean when it says that the iron is

asked by Erin on January 21, 2017
72. ## Probability

Manhole explosions (usually caused by gas leaks and sparks) are on the rise in your city. On any given day, the manhole cover near your house explodes with some unknown probability, which is the same across all days. We model this unknown probability of

asked by A on April 20, 2014
73. ## Chemistry

Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is the following. Cr2O3(s) + 2 Al(s) → 2 Cr(l) + Al2O3(s) What masses of chromium(III) oxide and

asked by Monica on January 21, 2014
74. ## Chemistry

Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is given below. Fe2O3(s) + 2 Al(s) 2 Fe(l) + Al2O3(s) What masses of iron(III) oxide and aluminum must

asked by Anonymous on April 25, 2010
75. ## Chemistry

How would you start and finish these questions by a step by step process? Does Amp equal to Joules? 1. How many grams of aluminum can be produced by the electrolysis of aqueous aluminum chloride by a current of 5.00 amps for 5.00 hours? 2. Consider the

asked by Erika on April 6, 2014
76. ## math

Mr.savage used 3 gallons of paint to cover 1350 of square feet of wall .at this rate how much paint wiil be needed to cover 1800 square feet.

asked by sharya on January 3, 2017
77. ## Math

Fran wants to cover a retangular box with contact paper. The box is 10cm long, 5cm wide and 5cm high. How much paper will she need to cover all 6 sides?

asked by Amy on February 17, 2016
78. ## math

some kangaroos can cover 30 feet in a singke jump! if a kangaroo could jump like that 150 times in a row, how much farther would it need to go to cover a mile? (1 mile = 5,280 feet)

asked by sharon on September 19, 2012
79. ## Math

Fran wants to cover a rectangular box with contact paper. The box is 10cm long, and 5cm wide and 5cm high. How much paper will she need to cover all 6 sides?

asked by Amy on February 26, 2015
80. ## Math

some kangaroos can cover 30 feet in a single jump. if a kangaroo could jump like that 150 times in a row, how farther would it need to go to cover a mile? (1 mile=5280 feet)

asked by Malik on October 15, 2012
81. ## Chemistry

HI, we conducted a qualitative analysis, to identify the cations in an unknown sollution..trying to determine whether it had Al 3+, Fe (3), and Lead ions..i am having trouble understanding some parts of the procedure. before testing for aluminum and iron,

asked by Joe on February 28, 2010
82. ## chem

the valence of aluminum is +3 and the valence of chlorine is -1. the formula for aluminum chloride is correctly written as? How many Chloride ions at -1 charge will equal one +3? Aluminium chloride is a whitish solid. Formula: AlCl3.

asked by fernando on October 8, 2006
83. ## soc120

which agents of socialization are most important at certain stages of human development? for example, discuss how the family is important to moral development or how peer groups are important to personality development .

asked by bud on June 19, 2010
84. ## Chem

A 28.4 g sample of aluminum is heated to 39.4 C, then is placed in a calorimeter containing 50.0 g of water. Temperature of water increases from 21.00 C to 23.00 C. What is the specific heat of aluminum in cal/gC? Is the answer for this 0.3, using sig

asked by Ish on September 21, 2014
85. ## English

Word box abominable bumbling consequence delude dole engulf foil formulate initiative memento nonconformist null and void panorama posterity pry refurbish resourceful rigorous subsequent unerring 2.Anyone who ___ into someone elses business runs the risk

asked by Jerald on February 16, 2013
86. ## Algebra

6. One angle measures 54 more than 3 times another angle. The angles are supplementary. What are their measures? 11. A piece of string is 112 inches long. Isabel wants to cut it into 2 pieces so that one piece is three times as along as the other. How long

asked by James on April 9, 2015
87. ## Physics

A rectangular piece of gold is 3.8 cm long and 2.5 cm wide. How deep is the piece when it displays a resistance of R = 1.35 μω for a current that flows along the depth-direction?

asked by Susie on March 6, 2010
88. ## physics

A rectangular piece of gold is 2.5 cm long and 2.6 cm wide. How deep is the piece when it displays a resistance of R = 1.39 μω for a current that flows along the depth-direction?

asked by Nelly on April 23, 2010
89. ## Physics

An object has a weight of 0.852 N. It is suspended from a scale, which reads 0.749 N when the piece is submerged in water. What is the volume of the piece of metal?

asked by Robb on January 28, 2012
90. ## Algebra

A wire 20 cm long is cut into two pieces. The longer piece is 4 cm longer than the shorter piece. Find the length of the shorter piece of wire

asked by Rachel on June 14, 2016
91. ## Physic

The composite bar BCD in the figure is composed of an inner aluminum cylindrical core of length 2L=2 m and radius R=1 cm, and a sleeve of steel of length L=1 m and thickness R=1 cm surrounding the aluminum core in the CD section of the bar. The bar is

asked by Me on May 7, 2013
92. ## Chemistry

A 0.250g smaple of magnesium-aluminum alloy dissolves completely in an excess of HCl(aq). When the liberated H2(g) is collected over water at 29C at 752torr, the volume is found to be 297mL. The vapor pressure of water at 29C is 30.0torr. What is the mass

asked by Cynthia on October 9, 2011
93. ## chem

over the years, the thermite reaction has been used for welding railorad rails, in incendiary bombs, and to ignite solid fuel rocket motors. The reaction: Fe2O3(s) + 2 Al (s) -> 2 Fe(l) + Al2O3 (s) What masses of iron ( III) oxide and aluminum must be used

asked by greeny on August 26, 2012
94. ## Science

What is the length of an aluminum rod at 65 C if its length at 15 C is 1.2 meters? I will be happy to critique your thinking. New length= oldlength(1+alpha*(65-15)) where alpha is the coefficent of linear expansion of aluminum 1.201386 meters

asked by Janice on July 31, 2005
95. ## science

how many kilojoules of heat must be transferred to a 480 g aluminum pizza pan to raise its temperature from 22 degree c to 234 degree c? The specific heat of aluminum in this temperature range is 0.97 J/g degree C.

asked by Justin on October 28, 2011
96. ## Health (Ms. Sue)

Why is sleep so important? A: The answer to why sleep is so important is not entirely clear, but we do know that sleep is needed by the brain. In fact, receiving enough decent quality sleep is as important as being physically fit and having considerable

asked by Anonymous on November 5, 2013
97. ## chemistry

If 5.50 moles of aluminum are reacted with 4.55 moles of copper(II) chloride, how many moles of aluminum chloride are porduced by the limiting reactant?

asked by Tara on February 13, 2012
98. ## Chemistry

An insulated beaker contains 250g of water at 25 degrees celsius. Exactly 41.6g of a metal at 100 degrees celsius was dropped in the beaker. The final temperature of the water was 26.4 degrees celsius. Assuming that no heat is lost in any other way,

asked by Hannah on January 22, 2012
99. ## math

Three boys are sharing a cake. Joey ate 2/5 of the cake, Billy ate 1/3 of it, and Matt ate the remaining piece. What is the ratio of Joey's piece to Billy's piece to Matt's piece?

asked by Dana on March 14, 2014
100. ## Algebra

The Robertson's find that have used 1/2 gallon of paint to cover 480 square feet of wall. They used 3/4 gallon of paint to cover 720 square feet of wall. Write an equation to find the number of gallons of paint they will need (G), in order to cover S

asked by Emily on March 5, 2014