# christy

Popular questions and responses by christy
1. ## physics

In lab you submerge 100 g of 41 degree Celcius iron nails in 100 g of 25 degree Celcius water (the specific heat of iron is 0.12 cal/g degrees Celcius) A)Equate the heat gained by the water to the heat lost by the nails and find the final temperature of

2. ## Math

The bearing of x from y is 045°and the bearing of z from y is 145°,where x,y and z are three points in the plane.lf y is equidistant from x and z,find the bearing of z from x.

3. ## chemistry

Copper reacts with nitric acid according to the following reaction: 3 Cu (s) + 8 HNO3 (aq) --> 3 Cu(NO3)2 (aq) + 2 NO (g) + 4 H2O (l) If an pre 1982 copper penny contains 3.10 grams of copper, what volume of 8.00 M nitric acid is required to exactly

4. ## PHYSICS

A 4 kg block is pushed along the ceiling with a constant applied force of 85 N that acts at an angle of 55 degrees with the horizontal. The block accelerates to the right at 6 m/s^2. determine the coefficient of kinetic friction between the block and the

5. ## 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.

6. ## physics

Find the mass of 0 degree C ice that 15 g of 100 degree Csteam will completely melt.

7. ## Chemistry

Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction:H3PO4 + Mg(OH)2 -----> Mg3(PO4)2 + H2O.Balance the equation, then enter the coefficients

8. ## Physical Science

Aluminum has a density of 2.70 g/cm^3. What is the mass of a piece of aluminum that has a volume of 100.0cm^3? How would I figure this out? Thanks so much. :)

9. ## psychology

51. Given the changes in sex-offender laws, the emphasis of concern appears to be swinging toward: A) protecting children. B) sympathizing with sex offenders. C) white Americans. D) states' rights

10. ## horizon

What part of speech is the italicized word in the sentence below? What part of speech is the italicized word in the sentence below? Four score and seven years ago, our forefathers brought forth UPON this continent a new nation conceived in liberty and

11. ## physics

Water with a mass of 0.500 kg at 15.0 degree C is mixed with 0.800 kg of water at 35.0 degree C. What is the final temperature T_f of the mixture?

12. ## calculus

Determine which consecutive integers the real zeros of the function are located. f(x) = 4x^4 - 16x^3 - 25x^2 + 196x -146 Is there an easier way to this besides trial and error synthetic division? Also, how do I approximate the real zeros?

13. ## physics

An object starts from rest and accelerates at a rate of 2.50 m/s/s for 7.00 seconds. The velocity at the end of the 7.00 seconds is...

14. ## chemistry

How do you calculate the % empty sapce in 100mL of air. Using Avogadro's number(6.02x10^23) and the average volume of O2 and N2(3.8x10^-24 cm3/molecule). I think you can use the ideal gas law but am not really sure how to do it. I also have a similar

15. ## English

The Awakening questions 1. What role or purpose does love have in this book? 2. How does Kate Chopin use other characters, both male and female, in The Awakening in order to illustrate Edna Pontellier’s desires and social limitations? Choose at least

16. ## Trig

Use sum and difference identitites to find the exact value of co 15 degrees

17. ## physics

Two point charges are separated by 6.4 cm. The attractive force between them is 10 N. Suppose that the charges attracting each other have equal magnitude. Rearrange Coulomb's law and find the magnitude of each charge

18. ## physics

Radioactive decay of granite and other rocks in Earth's interior provides sufficient energy to keep the interior molten, to heat lava, and to provide warmth to natural hot springs. This is due to the average release of about 0.03 J per kilogram each

19. ## Math

The surface areas of two similar solids are 416yd ^2 and 1,354yd ^2. The volume of the larger solid is 2,976 yd^3. What is the volume of the smaller solid? 2,976 yd ^3 2,619 yd ^3 914 yd ^3 507 yd ^2

20. ## psychology

Dr. Comer points out risks of adolescence, such as alcoholism, drug abuse, and teen pregnancy

21. ## physics

At a certain location, the solar power per unit area reaching Earth's surface is 200 W/m^2, averaged over a 24-hour day.If the average power requirement in your home is 2.8 kW and you can convert solar power to electric power with 8.0 % efficiency, how

22. ## Statistics

Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers). Bellevue Hospital in New York City uses 100.6 °F as the

23. ## Physics

Two projectiles are launched from ground level at the same angle above the horizontal, and both return to ground level. Projectile A has a launch speed that is twice that of projectile B. (Sketch trajectories of projectiles). Assuming that air resistance

Two cards are drawn without replacement from an ordinary deck of 52 cards. What is the probability that the second card is a spade if the first card was not a spade ? 13/51 is that correct, do I need to reduce this number?

25. ## Chemistry

An industrial raw materials as the following composition by mass : iron = 28.1% chlorine = 35.7% and water of crystalization = 36.2%. Calculate the formula for the material given that Hydrogen is 1, oxygen is 16, chlorine is 35.5 and iron is 56.

26. ## science

Two copper globes are floating in space with a charge of -10 and charge of +16. They come together then go back apart. What are the resulting charges

27. ## physics

four point charges on corners of a square.. top left -1, top right +2, bottom left -2, bottom right -1 ... object in middle is -1 ... which direction will that object move? up, down, left, or right (no angles)

28. ## Math

You food costs are \$1700. Your total food sales are \$8500. What percent of your food sales do the food costs represent?

29. ## Math

A serving of ice cream contains 5000 calories. 200 calories come from fat. What percent of the total calories come from fat?

30. ## psychology

Which of the following is the MOST accurate conclusion one can draw about the mental health field? A) Mental health professionals are gaining respect in society. B) What mental health professionals know and can do outweighs what they do not know and cannot

31. ## psychology

Dr. Comer points out risks of adolescence, such as alcoholism, drug abuse, and teen pregnancy A) are more severe in lower socioeconomic groups B) are virtually nonexistent in middle-income children C) exist for all children, regardless of income level D)

32. ## Physics

Racing on a flat track, a car going 32 m/s rounds a curve 56 m in radius. What is the force of friction needed for the car to round the curve without slipping?

33. ## physics

Two pellets, each with a charge of 0.80 microcoulomb (8.0×10−7 C), are located 4.0 cm (4.0×10−2 m) apart. Find the electric force between them, which I solved for 3.6 N. I am stuck on the next part: What would be the mass of an object that would

34. ## physics

last one before I got to go to work Which of these cities has the smallest incidence of cosmic rays? A) All about the same.B) New York City.C) Mexico City.D) Singapore.E) Anchorage.

35. ## physics

The relationship between magnetic force and magnetic pole strength is similar to the relationship between which of the following?. A) force, mass, and distance as in Newton's law of gravity.B) All of these.C) current, voltage, and resistance as in Ohm's

36. ## physics

An electric motor best makes use of the fact that on a current-carrying wire in a magnetic field there exists which of these?. A) electromagnetic energy to be tapped.B) rotation.C) All of these.D) a force.E) a changing voltage. Is this roation or all of

37. ## physics

Which of these is the same in identical branches of a parallel circuit? A) All of these.B) Voltage.C) Current.D) None of theseE) Resistance. again my textbook says that voltage is the one that the paths are the same,is it all of these?

38. ## physics

Electric current is a flow of electric charge that moves due to an electric pressure is called what?. A) wattage.B) voltage.C) All of these to some degree.D) None of these.E) amperage. I chose ampere, this is what my textbook tells me and I got it wrong

39. ## physics

A 40g chunk of 90 degree C iron is dropped into a cavity in a very large block of ice at 0 degree C.Find what mass of ice will melt. (The specific heat capacity of iron is 0.11 cal/g degree C)

40. ## physics

The specific heat capacity of ice is about 0.5 cal/g degree C A)Supposing that it remains at that value all the way to absolute zero, calculate the number of calories it would take to change a 0.50g ice cube at absolute zero (-273 degree C}) to 0.50 g of

41. ## physics

In lab, Will burns a 0.6 g peanut beneath 48 g of water, which increases in temperature from 22 degree C to 55 degree C. The amount of heat absorbed by the water can be found with the equation Q =cm \Delta T, where Q is the amount of heat, c the specific

42. ## physics

On a perfect fall day, you are hovering at low altitude in a hot-air balloon, accelerated neither upward nor downward. The total weight of the balloon, including its load and the hot air in it, is 24000 N. Find the weight of the displaced air. !!I got

43. ## physics

A mountain-climber friend with a mass of 82 kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs. He wonders what the approximate size of such a balloon would be. Hearing of your physics

44. ## math

How can you tell if a number is rational or irrational? a) 3.215 (there is a line drawn over the 15) b.) square root 10 c) 0.143639854024 d)4.312 can you please explain what i need to look at to tell which is which?

45. ## Geometry

How many pieces of square floor tile, 1 foot on a side, would you have to buy to tile a floor that is 11 feet 6 inches by 8 feet?

46. ## english

I have to write a short paper on Shakespeare Twelfth Night-Act 5 scene 1 lines 248-262. But what we have to do is to translate those lines into a different "lingo" dialect but I don't even know how to get started. Can someone please help?

47. ## math

Identify the following amounts. 1. "Decidollar" 2. "Centidollar" 3. "Dekadollar 4. "kilodollar"

In this passage I need to find the main idea and 3 supporting details. You have probably gone on a merry-go-around. Theres one at most theme and carnivals. You find a painted horse or other animal. You climb up on its back. Most of the animals are on the

49. ## math

There are a total of 107 foreign language students in a high school where they offer only Spanish, French, and German. 42 take Spanish. 46 take French. 45 take German. 8 take Spanish and French but not German. 8 take Spanish and German but no French. 6

Amy paid \$60.12 for a pair of running shoes that were 15% off. What was the regular price. I am coming up with 69.14 (round to nearest cent)

51. ## math

The following scores on the midterm exam in Chemistry 102 were recorded, 93 81 59 69 82 73 61 77 95 84 88 71 86 97 63 72 89 80 60 98 91 62 78 83 76 81 94 66 83 96 find the interquartile range. I do not understand this question.

Two cards are drawn without replacement from an ordinary deck of 52 cards. What is the probability that the second card is a spade if the first card was not a spade ? 13/51 is that correct, do I need to reduce this number?

53. ## Math156

As a source the reporter uses a graph that states the average number of firearms per owner is 4.5. If the reporter created a headline that every person in the united states owns more than 2 firearms. Should the editor accept the headline ? I am thinking

Calculate the % empty space in 1 mole of water at 25 degree C (d=0.9971g/ml). The volume of a water molecule can be taken as the sum of the volumes of the 2 hydrogen molecules and the oxygen atom. Use the single bonded covalent radii of 37pm for hydrogen

55. ## college chemistry

Calculate the % empty space in 1 mole of water at 25 degree C (d=0.9971g/ml). The volume of a water molecule can be taken as the sum of the volumes of the 2 hydrogen molecules and the oxygen atom. Use the single bonded covalent radii of 37pm for hydrogen

56. ## Chemistry 1

What is the chemical equation, name, and formula for the follwing? "When strongly heated, magnesium sulfide formed a yellow crystalline deposit on the walls of a sealed reaction vessel. Metallic deposits were found on the bottom of the container"

57. ## english

Hello - I am not sure you can help me ...I have to write an essay which I did for an english class which I already did, but I was wondering if you know of any free websites that can proof read my work? Just thought I would ask :)

58. ## Science

Using the law of conservation of matter, explain why there is no “away” when dealing with the issue of pollution. Any chemical reaction yields a product mass equal to the reactant mass.

59. ## Science

Distinguish between high-quality energy and low-quality energy, and give an example of each. Relate these terms to energy efficiency. Frankly, these terms could mean anything. In my electrical engineering career, high quality energy was a high thermal

60. ## Music

What musical form preceded the sonata-allegro form, and is the sonata-allegro form still being used today? Sup' Christy, I beleive the form that preceed the sonata-allegro form would be the "minuet and trio" form. Symphonies are where you can find the s-a

61. ## Algebra

Which kind of function best models the data in the table? Use differences or ratios. X = 0, y = 1.7 x = 1, y = 6.8 x = 2, y = 27.2 x = 3, y = 108.8 x = 4, y = 435.2 Can you please help me with this? I do not understand this unit as well as the other ones.

62. ## math

How much codeine is needed for the pharmacy technician to prepare 120ML of a cough syrup with a codeine concentration of 15MG/ ML?

63. ## math

A KCL Elixir contains 10MEQ/15ML. The daily dose is 30 MEQ. How many ML's total should the pharmacy technician prepare for a 30 day supply?

64. ## chemistry

A 25 g gold nugget with an initial temperature of 60 °C is dropped into an insulated cup containing 100 ml of water initially at a temperature of 5°C. What is the final temperature after thermal equilibrium is established? Refer to Table 3.4 of the text

65. ## History

How was the Iroquois league able to survive English and French colonization while the Aztec empire was not able to survive Spanish colonization

66. ## CHM

Calculate the heat absorbed by 125 g of water (SH = 1.00 cal/g°C) when the temperature rises from 21.0°C to 35.0°C.

67. ## Math

Mary spent 3/7 of her time playing, 2/3 reading. What fraction of her time is left?

68. ## Pre algebra

Can someone show me the steps to work this problem? X/4+1=-5

69. ## french

complete each sentence with appropriate expressions to make it correct and meaningful. 1. Ces enfants n'aiment pas ............... au village. 2. Led infirmiers de cet hopital ........... 3. Nous n'etudians ............... bibliotheque. 4. Oulest-ce que

70. ## Chemistry

If you have a properly adjusted hot flame, which is pale blue with three distinct comes, what is observed if the GAS CONTROL valve is slightly closed versus what's observed if the AIR CONTROL valve is slightly closed? Please Explain.

71. ## Math

How many 1/8 liter glasses of juice can you pour from a 1/2 liter bottle of juice?

72. ## physics

A copper of mass 400g is heated until it's temperature becomes 250degree celcius. It is dropped into water weighing 200g at 50 degree celcius.calculate the mass of water vapour produced.

73. ## Math

Out of a group of 60 students, 14 students walk to school. What percent of the group of students walk to school.

74. ## Math

Kevin found that 15% of the 40 students in his history class said that history was their favorite subject. How many students like history the best?

75. ## Math

Calculate 56% of 880 kg?

76. ## Math

The chef has 300 pounds of strip sheep. The trim loss on the strip sheep is 40% and the cooking loss is 60% of the trimmed weight. How many pounds of trimmed cooked strip sheep will the chef have left to serve to his customers?

77. ## Math

Find each unit rate Julio walks 3 1/2miles in 1 1/4hours

78. ## Chemistry

Explain the laboratory preparation of one Litre of 1.3M formic acid buffer of pH 3.9 from solid sodium formate (molecular weight =68) and formic acid liquid 30% pure (Density of formic acid = 1.029g/ml, pKa = 3.75)

79. ## Physics

A startled armadillo leaps upward, rising 0.644 m in 0.170 s. a. What is its initial speed? b. What is its speed at this height? c. How much higher does it go? For a. 0 is not the answer and neither is 3.79 m/s (product of .644m*.170s)

80. ## Chem

a gas has a volumn of 36.0 L and a pressure of 750 torr when the temperature is 10 degrees celsius. what is the pressure if the volume changes to 78 degrees celsius if the amount of gas stays the same?

81. ## math

Jo Lee wants to hang three 3-inch by 5-inch prints on her wall. She wants to line them up vertically with an inch between each print. What is the minimum wall space that Jo Lee must have? Please explain!!!!

82. ## Math

At the beginning of the summer Molly decided to add a little money into her savings account every week. After seven weeks her account had \$175. At the end of 15 weeks her account had \$375. Assumed that she put the same amount of money into her savings

83. ## 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?

84. ## math

The scale on a map i 1cm to 4km What does 4cm on the map represent ?

85. ## Math.

T -shirts for first prize winners in the games cost \$23.40. This was \$8.77 less than their cost one year ago. What was the cost of the T-shirts one year ago?

86. ## SCI207

Net- zero refers to a building or installation that produces less energy less than consumes, considered to be energy reliant. True or false

87. ## math

number N of state and federal inmates in millions during year x where x >=2002 can be approximated by the following formula N=0.04x-79.02. determine the year in which there were 1.1 million inmates

88. ## Math

The number of 5th grade students who volunteered to help clean up the park this was 5 less than twice as many last year If 39 5th graders volunteered to help clean up the park this year how many volunteered last year

89. ## geometry

Pqrs -jklm with a scale factor of 4:3qr-8cm what is the value of kl

90. ## penketh high

Laughing Gas, N2O, is made by the careful decomposition of ammonium nitrate NH4NO3 (s) = N20 (g) + 2H20 (g) How many grams of N2O can you obtain? How many dm3 of stream would also be produced?

91. ## Math

Reasonables: I am between 24 and 34 what number am I

92. ## psychlogy

what might be the advantages of using the archival methods?

93. ## Math

It is greater than 43 and less than 52 if you add the digits the sum 8 right the number word

94. ## Math

It is greater than 43 and less than 52 if you add the digits the sum is 8 write the number word

95. ## Algorithms

Help Please: I need some help and guidance to solving this problem Week 4 CheckPoint – Repetition and Decision Control Structures In one of the week 3 discussion questions we discussed the algorithm that would be required to make a peanut butter

96. ## Psychology And Your Life

I am trying to construct a sentence using Maslow's theory on Physiological Needs. It can be personal or hypothetical.

97. ## vulindlela

How smoking is a human factor that may cause ill health

98. ## physics

An electric motor best makes use of the fact that on a current-carrying wire in a magnetic field there exists which of these?. A) electromagnetic energy to be tapped.B) rotation.C) All of these.D) a force.E) a changing voltage. Is this roation or all of

99. ## physics

last one for now..this is nowhere in my text !! Which of these cities has the smallest incidence of cosmic rays? A) All about the same.B) New York City.C) Mexico City.D) Singapore.E) Anchorage.