# Julie

Popular questions and responses by Julie
1. ## math

The volume of a pyramid varies jointly with the base area of the pyramid and its height. The volume of one pyramid is 24 cubic inches when its base area is 24 square inches and its height is 3 inches. What is the volume of a pyramid with a base area of 10

2. ## chemistry 105

Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)-->2LiN(s) What mass of lithium (in g ) is required to react completely with 59.9 mL of N2 gas at STP?

3. ## chem

How many moles of carbon are needed to react with 525 g of hematite 2FeO3+6C->4Fe+3Co2 idk how to convert moles of fe2o3 to carbon

4. ## chemistry

Consider the following system, which is at equilibrium, 3C(s) + 3 H2(g) mc020-1.jpg CH4(g) + C2H2(g) The result of removing some C(s) from the system is that a) more CH4(g) and C2H2(g) are produced to replace that which is removed. b) Kc decreases. c) more

5. ## physics

A passenger on an interplanetary express bus traveling at = 0.95 takes a 9.0-minute catnap, according to her watch.How long does her catnap from the vantage point of a fixed planet last?

6. ## Chemistry

Suppose you titrated a sample of distilled water with EDTA, approximately what volume of EDTA would be required?

7. ## math

A company begins a radio advertising campaign in Chicago to market a new soft drink. The percentage of the target market that buys a soft drink is estimated by the function f(t)=100(1-e^-0.01t), where t is the number of days of the campaign. After how long

8. ## Chemistry

Given that E^o = 0.52 V for the reduction of Cu+(aq) + e - (yields) Cu(s) Calculate E^o, (delta)G^o and K for the following reaction at 25°C. 2Cu2+(aq) (yields) Cu2+(aq) + Cu(s)

9. ## Chemistry

Calculate E, E^o and (delta)G^o for the following cell reaction: Mg(s) + Sn2+(aq) (yields) Mg2+(aq) + Sn(s) [Mg2+] = 0.045 M, [Sn2+] = 0.035 M

10. ## Math

Isaac throws an apple straight up (in the positive direction) from 1.0 m above the ground, reaching a maximum height of 35 meters. Neglecting air resistance, what is the ball’s velocity when it hits the ground?

11. ## physic

a resistor has a voltage of 6.65 V and a current of 4.45 A. it is placed in a calorimeter containing 200g of water at 24 degree Celsius. the calorimeter is aluminum (specific heat= 0.220 cal/g-Celsius), and its mass is 60g. the heat capacity of the

12. ## Math

The length of a rectangle is 8 cm longer than its width , if the perimeter is 84 cm , what is its area

13. ## Chemistry 105

Ozone is depleted in the stratosphere by chlorine from CF3Cl according to the following set of equations: CF3Cl+UV light-->CF3+Cl Cl+O3-->ClO+O2 O3+UV light-->O2+O ClO+O-->Cl+O2 What total volume of ozone measured at a pressure of 22.0 mmHg and a

14. ## Physics

Monochromatic light of wavelength, λ is traveling in air. The light then strikes a thin film having an index of refraction n1 that is coating a material having an index of refraction n2. If n2 is larger than n1, what minimum film thickness will result in

15. ## Chemistry 105

Use the molar volume of a gas at STP to calculate the density (in g/L ) of carbon dioxide gas at STP.

A light spring of constant k = 170 N/m rests vertically on the bottom of a large beaker of water. A 5.70 kg block of wood (density = 650 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium. What is the

17. ## English

A topic sentence should be very long. 1. True 2. False Please recheck my answer. I say True

18. ## math

the needle of the scale in bulk food section of a supermarket is 25 cm long. find the distance when the needle rotates 50 degrees

19. ## Genetics 160

Using D for tall plants and d for dwarf plants, a 1:1 ratio is obtained in which of the following crosses? These are my choices: Dd X dd DD X dd DD X Dd DD X DD Dd X Dd

20. ## physics

A hot iron horseshoe (mass = 0.43 kg), just forged (Fig. 14-16), is dropped into 1.60 L of water in a 0.26 kg iron pot initially at 20°C. If the final equilibrium temperature is 26°C, estimate the initial temperature of the hot horseshoe. Could someone

21. ## geometry

What's the next number 360, 180, 60, 15...?

22. ## statistics

A sample of 16 ATM transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. State the hypotheses to test whether the mean transaction time exceeds 50 seconds.

23. ## Physical Science

How many meters away is a cliff if an echo is heard 0.500 s after the original sound? Assume that sound traveled at 343 m/s on that day.

24. ## Production/Operations Management

Here is a list of activity times for a project as well as crashing costs for its activities. Determine which activities should be crashed and total cost of crashing if the goal is to shorten the project by three weeks as cheaply as possible. First

25. ## science physics

Two locomotives approach each other on parallel tracks. Each has a speed of v = 95 km/h with respect to the ground. If they are initially d = 7.5 km apart, how long will it be before they reach each other?

26. ## chemistry

What is the is product of Nickel(II) nitrate+sodium phosphate This is what I have: Ni(NO3)2+Na3PO4----> can you help me on the resultant equation please

27. ## Math

a student answered 86 problems on a test and got a 98%. How many problems were on the test?

28. ## chemistry

So I did a titration lab at school with NaOH and HCl. i have to find: - volume used, NaOH - Moles of NaOH - Moles of HCl -Volume used unknown HCl - Molarity of HCl solution My concentration of NaOH stock solution was 0.100 mol/lL Final buret reading, NaOH:

29. ## chemistry 105

Complete and balance each of the following equations for gas-evolutions. Express answer as a chemical equation. Identify all the phases in your answer. HCl(aq)+K2SO3(aq)--> HCl(aq)+KHCO3(aq)--> HC2H3O2(aq)+NaHSO3(aq)--> (NH4)2SO4(aq)+KOH(aq)-->

30. ## english

Please tell me if I should use to or too in the following sentence: Anthony knew all (to, too) well that he shouldn't have eaten a third piece of lasagna.

31. ## physics help

Larry weighs 300 N at the surface of the earth. what is the weight of the earth in the gravitational field of Larry? -would it still be 300 N

32. ## Math

For the given graph of y=f(x), sketch the graph y=1/f(x). clearly show the asymptote(s) with a dotted line and write the coordinates of the invariant points

33. ## Math

Three times a number increased by seven is less than eleven

34. ## chemistry

3CuCl2 *2H2O + 2Al = 3Cu + 2AlCl3 + 6H2O Determine the number of grams that should have been produced when 1.25g of copper (2) chloride dehydrate reacts with excess aluminum so i'm not really sure how you're supposed to calculate the number of grams with

35. ## Economics

got this from my teacher, A monopolist faces a demand curve given by the following equation: P = \$500 − 10Q, where Q equals quantity sold per day. Its marginal cost curve is MC = \$100 per day. Assume that the firm faces no fixed cost. and have the

36. ## pre calc

Two forces of 50 and 70 N (newtons) act on an object. The angle between the forces is 40°. Find the magnitude of the resultant and the angle that it makes with the smaller force.

37. ## math

At 9:30 A.M. Andrew left Exeter for Portsmouth, cycling at 12 miles per hour At 10:00 A.M. Stacy left Portsmouth for Exeter, cycling at 16 miles pewr hour. The distance from Exeter to Portsmouth is 20 miles. At what time did they meet?

38. ## English/writing

Can someone tell me if this sentence is ok? Or give suggestions on how I can make it better? The students not only raised money during the walk-a-thon but continued to collect pledges three weeks afterward.

39. ## Math

Find the effective rate of interest for 5% compounded monthly.

40. ## Physics

A newly discovered particle, the SPARTYON, has a mass 895 times that of an electron. If a SPARTYON at rest absorbs an anti-SPARTYON, what is the frequency of each of the emitted photons (in 1020 Hz)? The mass of an electron is 9.11×10-31 kg.

41. ## PHYSICS

Suppose that at least 13.0 eV is needed to free an electron from a particular element, i.e., to ionize the atom. What is the lowest frequency photon which can accomplish this? And, what is the corresponding wavelength for that photon? Give frequency for

42. ## chemistry 11

Food manufacturers sometimes add calcium acetate to puddings and sweet sauces as a thickening agent. What volume of 0.500 mol/L calcium acetate, Ca(CH3COO)2 (aq), contains 0.300 mol of acetate ions? So I've been over this a hundred times and I still can't

43. ## Statistics

Scores on a certain exam are normally distributed with a mean of 78 and a variance of 25. What is the score obtained by the top 5% of the students? I do not understand the 5% part. What does the tail look like on the bell-shaped graph?

44. ## physics conceptual

The tires of a car support the weight of a stationary car. If one tire has a slow leak, the air pressure within the tire will _______ with time, the surface area between the tire and the road will ________ with time, and the net force the tire exerts on

45. ## math

Find the accumulated amount A, if the principal P is invested at an interest rate of r per year for t years. P = \$2500, r = 3%, t = 3, compounded quarterly \$ ?

46. ## Math

Lalph Rauren was famous for discovering potential models as he walked the streets of New York. One day he spotted four girls who later became top models: Amy, Mary, Kay, and Beth. One was discovered walking through an apartment building, one in a coffee

47. ## Chemistry 105

A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 9.3 atm?

48. ## chemistry 105

Sulfuric acid dissolves aluminum metal according to the following reaction: 2Al(s)+3H2SO4(aq)-->Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 14.7 g. What minimum mass of H2SO4(in g) would you need? What mass of H2

49. ## algebra

Find the equation of the line that passes through the points ( 8, - 15 )and(-2,5). write the equation in y=mx = b form.

50. ## Algebra

The resistance in an electric circuit varies inversely with the current. If the resistance is 12 ohms when the current is 4 amps, what is the resistance when the current is 8 amps.?

Two trains on separate tracks move toward one another. Train 1 has a speed of 125 km/h and train 2 a speed of 100.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of

52. ## pre algebra

\$29/kg = how many cents/ g???? im really confused

53. ## Chemistry

State whether each of the following aqueous solutions would be acidic, basic, or neutral. Include appropriate net-ionic equations to show why a given solution is acidic or basic. a) NaNO3 b)KC6H5CO2 c)50:50 mixture of C6H5CO2H+KC6H5CO2 d)(CH3NH3)Cl e)50:50

54. ## Physical Science

A cubic tank holds 1,000.0 kg of water. What are the dimensions of the tank in meters? Explain your answer.

55. ## physics

The New River Gorge bridge in West Virginia is a 518 m long steel arch. How much will its length change between temperature extremes -19°C and 39°C? (answer in cm)

56. ## Probability

Suppose a random variable X has a cumulative distribution function given by F(a) = {0 for a

57. ## Numerical Analysis

x 0 2 3 4 y 7 11 28 63 a)_Using these values, use the Lagrange interpolation process to obtain a polynomial of least degree. b)_rearrange the points in the table of a) and find the newton form of the interpolating polynomial. Show that they are the same

58. ## newton's method #2

i want to verify that when newton's method is used to compute sqrt(R) (by solving the equation x^2=R), the sequence o iterates is defined by x_(n+1)=.5(x_(n) + (R/x_(n))

59. ## Micro Economics

Health maintenance organizations (HMOs): A. are based on the traditional fee-for-service system of paying physicians. B. charge a fixed amount per member, hire many of their own physicians, and provide health services only to members. C. are also known as

60. ## physics

A 920 g empty iron kettle is put on a stove. How much heat in joules must it absorb to raise its temperature form 15.0° C to 93.0° C? (The specific heat for iron is 113 cal/kg · °C.)(1 cal = 4.184 J)

61. ## Algebra

Dan and Dave can work together and paint a house in 4 days Dan works twice as fast as Dave. How long to paint house alone

62. ## Math

Write a mixed number that is equivalent to 16/3

63. ## Physics

I've got a few questions. I'll show my work but I'm struggling and need to turn in this homework by midnight :( 1) Calculate g (the acceleration due to gravity) for the space shuttle’s orbit, 200 km above the Earth’s surface. M= 5.98x10^24kg (given on

64. ## Science

How are the respiratory and circulatory and respiratory systems similar? A) Both systems provide glucose and other substances to cells. B) Both systems regulate blood flow throughout the body. C) Both systems help remove carbon dioxide from the body. D)

65. ## English

All sentences in a paragraph must relate to the idea that the topic sentence in the paragraph introduces. 1.True 2. False I say true. Please recheck my answer.

66. ## English

A brief, concise introduction can be effective. 1.True 2.False I think its true, please recheck my answer.

67. ## math

The student to teacher ratio is 19:1 at a local school and there is a total of 500 students and teachers. How many teachers and how many students are there. I'm not sure how to begin to set this up since I have two unknowns and not only one.

68. ## Math

A round silo is 55 feet tall and has a 18 foot radius. How high would a load of 31000 cubic feet of grain fill the silo?

69. ## science: chemistry

A buffered solution is made by adding 47.4 g C2H5NH3Cl to 1.00 L of a 0.68 M solution of C2H5NH2. Calculate the pH of the final solution. (Assume no volume change. Assume that all solutions are at 25°C.)

70. ## Physics

A weight of 340 N is suspended from a pole by means of a rod 4m long and a rope tied to one end 3m above. Find the tension on the rope the force of the rod.

71. ## Chemistry

Neutralization reaction HCL(aq) + NaOH(aq) -> NaCl(s) + H2O(l) Use your results to determine the netball change of the neutralization reaction, in kJ/mol of NaOH, Write the thermochemical equation for the neutralization reaction. I'm not sure how to even

72. ## chemistry

What mass of sodium hydroxide pellets must be poured into a waste drum containing 20.0 L o 3.0 mol/L sulphuric acid to completely neutralize the waste acid solution? Write a balanced chemical equation for this reaction. okay, so here is the work I already

73. ## Can someone Explain this(math)

34, 36, 43, 46, 47, 48, 48, 52, 53, 54 Box And whisker Plot I Don't Understand these at all can someone Explain without totally giving me the answer?

74. ## chemistry

Ammonium chloride and sodium nitrite react to form sodium chloride, water and nitrogen gas. If 6.33 moles of ammonium chloride react with sodium nitrite, how many grams of sodium chloride will be produced?

75. ## Chem Simple question

Magnesium metal burns in oxygen to form magnesium oxide, MgO. (a) Write a balanced equation for the reaction Why is it 2Mg+O2->2MgO and not Mg+O->MgO

76. ## math

the product of 1000 whole number is 1000, what is the largest possible value the sum of these numbers can have

77. ## Math

Sam needs to cut a piece of sheet metal into 8 pieces. All the cuts are made in the same direction. It takes him 5 minutes to make each cut. How many cuts will Sam make? How would making a table help you find the number of minutes it took Sam to cut the

78. ## Chemistry

The Cu2+ ions in this experiment are produced by the reaction of 1.0g of copper. Information already found out .016 mol Cu2+ produced Overall reaction is Cu2+(aq)+Cl-(aq)+Cu(s)=2 CuCl(s) Maximum mass of CuCl that can be prepared from the reaction sequence

79. ## Finance

Use the following financial statements for Lake of Egypt Marina, Inc. LAKE OF EGYPT MARINA, INC Balance Sheet as of December 31, 2012 and 2011 (in millions of dollars) 2012 2011 2012 2011 Assets Liabilities and Equity Current assets: Current liabilities:

80. ## Calculus Grade 12 University

a total of 8 meters of fencing are going to be used to fence in a rectangular cage for pets and divide it into three smaller cages **the photo that is shown with this question is three (3) boxes stuck together side by side horizontally*** determine the

Determine the equation of the tangent line to the function (² = square): f(x) = x + cos²x at x = pie/4

82. ## Calculus Grade 12 University

Use the second derivative test to find the local minimum and maximum values of each function, wherever possible. A) f(x) = 16/x + x^2 B) s(t) = t^4 - 8t^3

83. ## geometry

An equilateral triangle has sides that measure 5x+3 units and 7x-5 units. What is the perimeter of the triangle?

84. ## Chemistry 105

A sample of N20 gas has a density of 2.65 g/L at 298 K. What must be the pressure of the gas (in mmHg )?

85. ## Chemistry 105

Which of the following reactions are redox reactions? 1. Al(s)+3Ag^+(aq)-->Al^3+(aq)+3Ag(s) 2. SO3(g)+H2O(l)-->H2SO4(aq) 3. Ba(s)+Cl2(g)-->BaCl2(s) 4. Mg(s)+Br2(l)-->MgBr2(s)

86. ## Calculus

A stone is dropped from the edge of a roof, and hits the ground with a velocity of -145 feet per second. How high (in feet) is the roof

88. ## Chemistry

I need to find out what the total acid concentration is in Kool-Aid. If 23.3 mL of 0.1043M NaOH neutralize a 60 mL solution of Kool-Aid (10 mL) and water (50 mL), what is the total concentration in a 10.00 mL aliquot of Kool-Aid? If you prepared a standard

89. ## geometry

find the value of the variable and LN if M is between L and N. LM=8a, MN=11a, LM=24

90. ## statistics

Given a test statistic of z= 1.50, the p-value for a right-tail (upper tail) test is approximately

91. ## physics

How much work is done on a bookshelf being pulled 5.00m at an angle of 37.0 degrees from the horizontal? The magnitude of the component of the force that does the work is 43.0N

92. ## English

Write a five paragraph papper on the importance of literary elements on literatuer. Use examples.

93. ## physics

The figure below shows a test charge q between the two positive charges. Find the force (in newtons) on the test charge for q = 1 µC. Give a positive answer if the force is to the right and a negative answer if the force is to the left.

94. ## integral confusion

integral of Sec[2x]Tan[2x] i know u is sec 2x du=2sec2xtan2x dx what would i have to multiply with du so it would equal tan 2x dx? if my question is confusing, then here's another example of what i'm talking about: integral of (3x-2)^30 dx u=3x-2 du=3 dx

95. ## chemistry

one moles of a compound containing only carbon, hydrogen, and nitrogen was burned in the presence of excess oxygen to give 264g of CO2, 63 g of H20, and 46 g of NO2. Calculate the molecular formula of the compound.

96. ## Algebra

I just need an example of a real-life application of a quadratic function. Thanks so much!

97. ## life science!

Whats the difference between decomposer,consumer,and producer? give an example of each and tell how producers make their own food. I looked in my book but it just doesnt say anything about any of those 3 things!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! For food: A

98. ## History

All of the following were goals of the Confederate States of America EXCEPT: a. protecting against any effort to abolish slavery b. ensuring the continuation of the international slave trade c. protecting the slave trade in the U.S. d. ensuring the