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

15,221 questions, page 35

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

asked by Marge on October 30, 2012
2. ## Physics URGENT!!!

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

asked by Shannon on October 28, 2012

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

asked by Marge on October 29, 2012

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

asked by Marge on October 30, 2012

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

asked by Ted on October 29, 2012

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

asked by Shannon on October 29, 2012

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

asked by Shannon on October 27, 2012
8. ## Physics

A rabbit can cover a distance of 80 m in 5 s. What is the speed of the rabbit?

asked by Student on September 8, 2016
9. ## Math

Which tiles can be used to cover a 12 by 12 floor? 9 by 9? Suppose you have 2 by 2, 3 by 3, 4 by 4, and 5x by 5 ft tiles.

asked by Anonymous on October 30, 2013
10. ## english

There are specific dates, this recount spans a long period of time in the narrator’s life, it is in 1st person point of view, and only significant times in this narrator’s life were chosen to be included. These characteristics make this piece a memoir

asked by jimm on March 10, 2015
11. ## grammar

I have learned the difference between perception and interpretation, communication process is necessary for an effective way of communication. I have learned the most important skills for an effective team member. I know how to active listening techniques

asked by hiop on December 20, 2011
12. ## AP English Literature

After jack proposes to Gwendolen, he is interviewed by Lady Bracknell to interpret whether he is a suitable marriage possibility for Gwendolen. This encounter with Lady Bracknell reveals all of the following except - Victorian Beliefs - Lady Bracknell's

asked by Brighton on April 21, 2017

The interviewer wants to know why you got a "D" in all your English classes until this year, when you got a "B." Your best response is: (Points: 5) “I had problems writing and never thought it was important. Then, I realized that it is important, so I

asked by lisa on December 4, 2010
14. ## English Essay

From reading the short story "The Boat", what are the effects when people refuse to be restricted to the confines of a particular society? This is an essay topic that I chose, and I am not sure if my three subtopics cover it all (anger/disappointment,

asked by leo on February 11, 2015
15. ## economics

Which of the following is an example of a fiscal policy? Raising taxes in order to cover a budget deficit. Preventing unions from going on strike. Increasing the level of the minimum wage. Restricting the amount of money that banks can lend.

asked by 2phoneeeeee on November 10, 2014
16. ## English

From reading the short story "The Boat", what are the effects when people refuse to be restricted to the confines of a particular society? This is an essay topic that I chose, and I am not sure if my three subtopics cover it all (anger/disappointment,

asked by leo on February 11, 2015
17. ## Math help plz

2. Sarah need to cover the lateral area and the base on top of the cylinder. h=12in r=6in v=? about how many square inches of paper will Sara need? A. 282in 2 is the ratio B. 254in C. 679in D. 565 answers plz for all

asked by supergirl on April 13, 2017
18. ## Social studies

Why would ironclads prove more important to the union then to the Confederacy? A. The war at sea was not in Porten to the confederacy but it was to the union. B. The Confederates you did not have the resources to make ironclads but the union did. C. The

asked by Cxgjbcf on February 15, 2017
19. ## General-English

Posted by angie on Sunday, September 25, 2011 at 4:48pm. Is the change in trade name of a material considered a "like-for-like" change? General-English - Ms. Sue, Sunday, September 25, 2011 at 4:52pm Please explain what you mean by a "like-for-like" change

asked by angie on September 25, 2011
20. ## Dr.Bob

I had to take cereal crush it up and place it in a crucible and cook it tell it was black ash. Then I took that burnt ceral and placed it into a beaker with HCL and water and boiled it tell the cereal was like a liquid cause coming out of the crucible it

asked by Suzy on November 17, 2007
21. ## Math

Mark needs to cut a piece of glass to replace a broken window. He has four pieces of glass: 6 feet long, 5 feet long, 3 feet long, and 7 feet long. If the length of the glass he needs to cut is feet long, which piece of glass should he cut to have the

asked by MsHemmoPenguin on October 28, 2015
22. ## Math

If you fold a normal piece of paper in half and then fold that in half and then fold that in half etc and repeat the folding 50 times, How thick is your final result? You can assume that the original piece of paper is 1/1000 of an inch thick. Let t denote

asked by Wendy on September 20, 2006
23. ## MATH PLZ HELP

7. Which of the following is an example of independent events? A rolling two number cubes B selecting marbles from a bag without replacement after each draw C choosing and eating a piece of candy from a dish and then choosing another piece of candy*** D

asked by MS.SUE,DAMON,REED ANYONE on May 19, 2016
24. ## chemistry

Oxygen gas reacts with powdered aluminum according to the following reaction: 4Al(s)+3O2(g) yields 2Al2O3(s) What volume of gas (in L), measured at 770 mmHg and 35 degrees C, is required to completely react with 53.9g of Al?

asked by rusty on March 8, 2009
25. ## chemistry

I ned these classified as metallic, ionic, molecular or covalent network and two reasons why. Aluminum Ascorbic acid Graphite Paraffin Palmitic acid Sodium chloride Sucrose Water

asked by Morgan on February 25, 2015
26. ## chem

Calculate the number of liters of hydrogen, measured at STP, that can be produced from the reaction of 0.155 mol of aluminum according to the following unbalanced chemical reaction equation. i got .193 L of H2 but it was wrong. i only have one submition

asked by hannah on December 9, 2010
27. ## chemistry

using the metals aluminum and silver,give a diagram of a galvanic cell in a nitrate solution. include the anode and cathode half reaction, the cell voltage, the electron/ion flow.

asked by nico on May 16, 2012
28. ## Chem

The information below shows properties of aluminum (Al). DELTAHfus = 10.07 kJ/mol DELTAHvap = 225 kJ/mol Which quantity of heat is required to melt a 342.9-g sample of Al? 127.98 kJ 214.93 kJ 2,851.95 kJ 3,453.00 kJ

asked by Kiley on April 15, 2014
29. ## English

The question for my essay was to agree or disagree with: Some critics argue that you can only fully understand a piece of literature if you understand the historical events that were on going when it was being written. Others argue that each piece of

asked by Justine on June 22, 2016
30. ## Science

why does a 5p sink but a heavier piece of wood floats?

asked by MR. on May 20, 2012
31. ## math

how long is the diagonal of a piece of paper that is 8.5 in by 11in

asked by Anonymous on February 12, 2012
32. ## english

Explain why it is necessary to have the following literary elements in a piece of literature.

asked by terrance on October 5, 2010
33. ## physics

What is the volume of a piece of iron (p=7.9 g/cm cubed) that has a mass of 0.50 kg?

asked by Beverly on May 19, 2011
34. ## geometery

how long does a piece of wire need to measure to get 18" diameter?

asked by Rita on July 31, 2012
35. ## physical science

If the volume of a piece of oak is 12 cm3, what's its mass?

asked by aric on September 2, 2014
36. ## Physics

how much work is done when a magnet pulls a piece of iron?

asked by Jeet on November 11, 2011
37. ## college

CAN YOU GIVE ME A BEST ORATORICAL PIECE ABOUT NURTURING THE YOUTHS??

asked by LEONARD on November 24, 2010
38. ## high school

can u give me an oratorical piece about philippine corruption?

asked by nikki princess on November 2, 2008
39. ## ant

What does Miner's piece tell us about the difficulty of describing another culture

asked by sharon on January 16, 2011
40. ## fractions

what single fraction piece equals two eights

asked by jocelyn on September 29, 2009
41. ## Math

Solve the piece wise function when f(17) f(x) = f(x-3)+2 if x > 10 -5 if x

42. ## math

Name two ways to get .60 cents without a 50 cent piece and 3 coins.

asked by Anonymous on September 14, 2010
43. ## art

why would an artist chose to use harmony in a piece of artwork?

asked by elizabeth on November 30, 2014
44. ## lit

could you help i need abou 6 ideas for a expository piece Thanks:leslie

asked by Leslie on January 7, 2009
45. ## South America

What is the longitude and latitude of every piece of south America?

asked by Kate on November 20, 2013
46. ## physics

What is the volume of a piece of iron (ñ = 4.4 g/cm3) that has a mass of 0.65 kg?

asked by ivy on January 25, 2012
47. ## physics

What is the volume of a piece of iron (ñ = 4.4 g/cm3) that has a mass of 0.65 kg?

asked by ivy on January 25, 2012
48. ## Math

How many ways can one get 60 cents using only three coins and no 50 cent piece?

asked by Jill on September 8, 2010
49. ## math

I have a piece of rope 3 1/2 ft long. I use 3/4 on a project. How much I have left?

asked by Anonymous on February 11, 2013
50. ## English

What does it mean to write a reflective piece? Just writing an essay?

asked by Me on January 9, 2014
51. ## ant

What does Miner's piece tell us about the difficulty of describing another culture?

asked by sharon on January 6, 2011
52. ## college

can somebodt give me an oratorical piece about nature?

53. ## English

What is the explanation of idiom;get a piece of slice of the action.

asked by Kago Koonne on January 30, 2017
54. ## band

In the piece Alamo March what typically happens on a trio?

asked by ben on June 4, 2008
55. ## math

how long is the diagonal of a piece of paper that is 8.5 in by 11in

asked by Anonymous on February 12, 2012
56. ## physics

What is the volume of a piece of iron (ñ = 4.4 g/cm3) that has a mass of 0.65 kg?

asked by ivy on January 25, 2012
57. ## kindergarten math

what does this mean draw a piece of yarn 3 counters long?

asked by marc on January 20, 2010
58. ## Art

How can I describe a ceramics art piece? Is there certain words i should use?

asked by rebecca on November 14, 2012
59. ## college_anthropology

What does miners piece tell us about the difficulty of describing another culture?

asked by kristina on September 1, 2010
60. ## Math

How many pieces 9 in long can be cut from a 15 ft.piece of wood

asked by Jack on November 8, 2016
61. ## math

how long is the diagonal of a piece of paper that is 8.5 in by 11in

asked by Anonymous on February 12, 2012
62. ## math

If a board 4 ft.X 8 ft. was cut into 50 pieces, what size would each piece be?

asked by Jan on August 16, 2012
63. ## science

what is the mass of a piece of zinc if it has a volume of 225cm

asked by bailey lewis on November 19, 2010
64. ## math

How many centimeters is a piece of paper that measures 12 inches?

asked by Anonymous on April 8, 2014
65. ## oratorical piece

can somebody give me a good oratorical piece???...thanks a lot...

asked by klar maesen on January 28, 2008
66. ## writing

I need more facts about the GPS and compass to use in my writing piece.

67. ## Chemistry

We did an experiment where we had to figure out the amount of water molecules in CuSO4xH2O (x being the value to find). If the stirring rod used was wet and was used to stir the beaker would this result in a higher x value? Is this a experimental or human

asked by John on April 20, 2016
68. ## PHYSICS NEED HELP FAST

a 1.0kg beaker containgin 2.00kg of oil with a density of 916kg/m3 rests on a scale. a 2.0kg block of iron is suspended from a spring scale and completly submerged in the oil, find the euilibrium readings of both scales.density of iron 7860.

asked by ricki on February 13, 2011
69. ## PHYSICS NEED HELP FAST

a 1.0kg beaker containgin 2.00kg of oil with a density of 916kg/m3 rests on a scale. a 2.0kg block of iron is suspended from a spring scale and completly submerged in the oil, find the euilibrium readings of both scales.density of iron 7860.

asked by ricki on February 13, 2011
70. ## PHYSICS NEED HELP FAST

a 1.0kg beaker containgin 2.00kg of oil with a density of 916kg/m3 rests on a scale. a 2.0kg block of iron is suspended from a spring scale and completly submerged in the oil, find the euilibrium readings of both scales.density of iron 7860.

asked by ricki on February 13, 2011
71. ## Math

Alberto is painting a large triangle on one wall of his bedroom the base of the triangle is 4ft and height is 8ft it takes 0.2 quart of paint to cover 1 square foot

asked by Gaby on March 3, 2017
72. ## physics

A train braking with constant deceleration covers 1km in 20s, and a second kilometre in 30s. Find the Deceleration. Wgat further distance will it cover before coming to a stop. and how long will it take?

asked by ivy on June 18, 2011
73. ## Maths

A courtyard is in the shape of a rectangle of length 11.2 and 7.2 breadth.find the measure of the largest square shaped tile that can be used (in the whole),to cover the courtyard completely ..how many tiles are needed for purpose.

asked by Moha on May 28, 2016
74. ## History

Who are israel's 3 most important musicians. I can't find this answer anywhere, I've had to look at almost every website. Try these sites. your word "important" musicians is ambigous. http://en.wikipedia.org/wiki/List_of_Israeli_musical_artists

asked by Blaine on December 16, 2006
75. ## Physics

1. You are tasked to design a car park on the top floor of a condominium that can accommodate 10 cars, each car has a maximum mass of 2000 kg. The material you are using can withstand a pressure of 500 N/m^2. Calculate how large your park must be? 2.

asked by Mei on September 3, 2014
76. ## Science

A)Could you add marbles to a beaker filled with sand and get the same results? B)How does the Particle theory model explain that a substance can be solid while having spaces between its particles? C)Why does 50 ml of water and 5oml of sugar NOT produce 100

asked by Harmony Ann on February 24, 2014
77. ## someone help

my post is still on this page as algebra, could someone elaborate on what bobpursley tried to help me with. See your original post. I am guessing you are referring to your question 5)Simplify:(5x-4)^2 and your answer= 25x^2 - 16 (5x-4)^2 =(5x-4)(5x-4) =

asked by erin on August 1, 2007
78. ## medical office assistant

if both nondivorced parents of a dependent child have insurance that will cover the child, which policy is considered to be the primary carrier for the child?

asked by shai on December 20, 2009
79. ## Physics

The game of Jacks is played with pieces like those shown to the right, consisting of four small spheres at the ends of two perpendicular rods of length L and mass M. The piece is spun as shown about an axis through the third perpendicular rod of length L

asked by Anonymous on March 15, 2017
80. ## childcare

A common misperception among managers is that _______ play is more important, but it's actually more important for children to have _______ play. A. structured, unstructured B. unlimited, limited C. unstructured, structured D. limited, unlimited

asked by Nab on August 9, 2013
81. ## The practice of working with school age children

A common misperception among managers is that _______ play is more important, but it's actually more important for children to have _______ play. A. structured, unstructured B. limited, unlimited C. unstructured, structured D. unlimited, limited C.

asked by Amanda on October 28, 2014
82. ## Math

How many square feet of tile would be needed to cover the area of a room 14 feet long and 12 feet wide?

asked by Brittany on March 2, 2016
83. ## east salisbury

Emily and Hanna are painting their bedroom wall. each 1/2 of paint covers 1/6 of the wall how many gallons will they need to cover the whole wall

asked by malaya on December 1, 2015
84. ## Math

One side of a square is 10 inches long. How many 1 square inch tiles are needed to cover the area of the square?

asked by Jae on January 28, 2017
85. ## chemistry

A voltaic cell can be built using the reaction between Al metal and O2 from the air. If the Al anode of this cell consists of 65 g of aluminum, how many hours can the cell produce 1.5 A of electricity, assuming an unlimited supply of O2?

86. ## Chemisty

Consider the reaction of sulfuric acid, H2SO4, with sodium hydroxide, NaOH. H2SO4(aq) + 2 NaOH(aq) -> 2H2O(l) + Na2SO4(aq). Suppose a beaker contains 35.0mL of 0.175M H2SO4. How many moles of NaOH are needed to react completely with sulfuric acid? Thank

asked by Mandy on October 22, 2014
87. ## physics

A car cruise down an expressway at 25m/s it decelerates for 2m/s and last for 3secs. (a) what velocity will the car have at the end (b) calculate the distance the car would cover

asked by Olamide on April 4, 2016
88. ## Economics

The role of an assumption in an economic theory is to: a. add realism b. prove the theory c. cover special cases d. simplify the theory

asked by Jessica on September 8, 2010
89. ## PHYSICS

TRACY SWIMS ACROSS A STREAM OF WIDTH 40.0M IN 33.0S WHEN THERE IS NO CURRENT.SHE TAKES 59.0 TO COVER THE SAME DISTANCE WHEN THERE IS CURRENT.FIND THE SPEED OF THE CURRENT RIVER.

asked by ERIC on November 19, 2007
90. ## Physics

Tracy swims across a stream of width 40.0 m in 33.0 s when there is no current. She takes 59.0 s to cover the same distance when there is a current. Find the speed of the river current.

asked by Willie on September 21, 2009
91. ## English/Writing

5. Choose one of the topics listed below and write a five-sentence paragraph using chronological order to arrange the details of the paragraph. a. Signing on to my homepage is simple. b. Writing a paper takes patience and time. c. Let me explain how to

asked by jackie rios on November 9, 2010

Perform the indicated operations and simplify the result. Leave your answer in factored form. 1) x/16 - 1/x all over 1 + 4/x A) x+4/16 B) x-4/16 C) 16/x+4 D) 16/x-4 E) -16/x+4 I chose answer C. I saw this as x^2-16/ x+4. Multiply the following using the

asked by Hannah on September 9, 2010
93. ## Chemistry Lab+Help

Okay, basically what we did in the lab was fill up an empty soda can with about 5mL of water, and we had to heat it up to a boiling point. After that we turned the soda can upside down into a beaker with cold water. After a minute or so, the can just

asked by Chopsticks on March 22, 2009
94. ## physics

the driver of a truck going 50 mph applies the brakes giving the truck a deceleration of 4.5 m/s^2 how long will it take the truck to come to a complete stop what distance will it cover

asked by glenn on July 14, 2016
95. ## problem solving - math

the men are camping 45 miles due west and then go 60 miles directly north. if they can cover 18 miles a day how long will it take them to reach the railroad?

asked by confused on October 3, 2013
96. ## physics

the driver of the truck going 50 mph applies the brakes giving the truck a deceleration of 4.5 m/s^2 how long will it take the truck to come to a complete stop what distance will it cover

asked by steve on July 18, 2016
97. ## English grammar

1. He gave us a piece of paper. 2. He gave each of us a piece of paper. 3. He gave us the paper. Does #1 mean #2? What about #3? Is #3 correct?

asked by John on October 23, 2007
98. ## Biology

Which of the following is a correct statement? A. Decomposition is an important part of only two of the three nutrient cycles. B. The nutrient cycles contain paths of elements through the living world but not through the nonliving world. C. Living

asked by Cassie on September 4, 2013
99. ## Chemistry

What is the likely identity of a substance (see Table 10-1) if a sample has a mass of 16.0 g when measured in air and an apparent mass of 15.2 g when submerged in water? Which of the following is it? -copper -gold -lead -aluminum -iron or steal -concrete

asked by Dominick on December 15, 2016
100. ## physics

A museum curator moves artifacts into place on many different display surfaces. Use the values in Table 4-2 in the textbook to find Fs,max and Fk if you were to move a 157 kg aluminum sculpture across a horizontal steel platform. Fs,max: Fk:

asked by Zach on November 18, 2010