# dee

Popular questions and responses by dee
1. ## Chemistry

Imagine two solutions with the same concentration and the same boiling point.? Imagine two solutions with the same concentration and the same boiling point, but one has ethanol as the solvent and the other has carbon tetrachloride as the solvent. Determine

2. ## physics

An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.

3. ## Cal 1

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) (1 + 2x)^1/4 ≈ 1 + 1/2x

4. ## BUS math

Bari Jay a gown manufacturer received an order for 600 prom dresses from China. Her cost is \$35 a gown. If her markup based on selling price is 79%, what is the selling price of each gown? Round to the nearest cent.

5. ## physics

The weight of an object is the same on two different planets. The mass of planet A is only forty-five percent that of planet B. Find the ratio rA/rB of the radii of the planets.

6. ## Physics

The coefficient of static friction between the 3.00 kg crate and the 35.0 degree incline is .300. What minimum force must be applied to the crate from sliding down the incline?

7. ## chemistry

Gaseous methane CH4 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O . Suppose 0.481 g of methane is mixed with 2.9 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the

8. ## Physics

Gas is confined in a tank at a pressure of 11 ATM and a temperature of 25 degree Celsius. If 2/3 of the gas is withdrawn and the temperature is raised to 75 degree Celsius, what is the new pressure in the tank?

9. ## History

Question 1 In the late nineteenth and early twentieth centuries, European nations formed alliances in order to __________. keep peace on the continent

10. ## Physics

Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely travel along the unbanked curve at a maximum speed v0 under conditions when the coefficient of static friction between the tires

11. ## Physics

During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs. (a) At what initial speed would a bomb have to be ejected, at angle 35degrees to the horizontal, from the vent at A in order to

12. ## Chemistry

Explain, in terms of electronegativity, why an H-F bond is expected to be more polar than an H-I bond.

13. ## History

12. What effect did technology have on World War I? It enabled nations to defeat their enemies with few casualties. It greatly increased the number of casualties.

14. ## Math

Bill paints murals. He recorded the total amount of white paint that he used for his murals each month in the table below. In April Bill used 2/3 of the amount that housed in May. Fill in the amount of white paint BIll used in April in the table below.

15. ## math

Anita's, a fast-food chain specializing in hot dogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant (as opposed to ordering the food "to go"), so it can make decisions regarding the possible construction

16. ## Chemistry

A buffer solution is prepared by mixing 50.0 mL of 0.300 M NH3 with 50 mL of 0.300 NH4Cl. The pKb of NH3 is 4.74. NH3 + H2O-> NH4+ +OH- 7.50 mL of 0.125 M HCl is added to the 100 mL of the buffer solution. Calculate the concentration of NH3 and NH4Cl for

17. ## chemistry

A major component of gasoline is octane (C8H18). When octane is burned in air it chemically reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). What mass of oxygen gas is consumed by the reaction of 8.17g of octane?.

18. ## math

The base of a solid is the region bounded by the parabola x^2 = 8y and y=4. Each cross section perpendicular to the y-axis is an equilateral triangle. Find the volume.

19. ## English

What best describes Emily Dickinson's attitude towards death? A.sentimental B.angry C.accepting

20. ## chemistry

When disaccharide beta is hydrolyzed, which monosaccharide units are produced?

21. ## math

find the image (0,0) after two reflections first across y=3 and then across X-axis

22. ## Math

If h is hours and n is the number of radios remaining, complete the equation: n= ____ x h = ____

23. ## Physics 2

A 10 g bullet is fired into, and embeds itself in, a 2 kg block attached to a spring with a force constant of 19.6 n/m and whose mass is negligible. How far is the spring compressed if the bullet has a speed of 300 m/s just before it strikes the block and

24. ## Math

Please help me with the following. Write a word phrase to represent the numerical expression below. 5 + ( 17 - 8 )

25. ## Math/ Proportions solve using unit rates

Contestants in a dance-a-thon rest for the same amount of time every hour. A couple rests for 25 minutes in 5 hours. How long did they rest in 8 hours? 25/5=5 8/5= 1 3/8 hours

26. ## geometry

the measures of the interior angles of a pentagon are 2x, 6x, 4x-6, 2x-16 and 6x+2. What is the measure of the largest angle

27. ## English

In terms of style and technique, "Old Ironsides" is __________. distinctive and unique similar to many European poems

28. ## Physics

Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 degree incline. The coefficient of kinetic friction between block and the incline is .436. Determine the work done by the friction force between block and incline and the work done on the

29. ## Math

Lisa, Beth, and Tim painted their grandparent's house. • The amount of time Lisa painted can be represented by x. • The amount of time Beth painted is 1 3 5 times the amount Lisa painted • The amount of time Tim painted is 1 2 3 times the amount Lisa

30. ## Math

Suppose that Ramos contributes \$6000/year into a traditional IRA earning interest at the rate of 2%/year compounded annually, every year after 35 until his retirement age at age 65. At the same time, his wife Vanessa deposits \$4900/year into a Roth IRA

31. ## Chemistry

The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution? Show work. A) 0.69 B) 0.32 C) 0.13 D)

32. ## math

a rectangle has a length of 10 3/16 inches and a width of 6 7/8 inches. nwhat is the perimeter of the rectangle

33. ## Chemistry

Explain how you would prepare 100.0 mL of 0.500 M NaCl solution. Include the appropriate glassware and calculations.

34. ## science

what is the mole ratio of C5H12-> C5H8 + 2H2?

35. ## uah

Assume you are performing the calibration step of Experiment 8 and you begin with 70 g of water at 20 oC and 70 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment,

36. ## chemistry

If 8.00g of methane is burned with 6.00g of oxygen. How much methane,oxygen,carbon dioxide,and water remain after the reaction is complete in grams?

37. ## Geometry

An unsharpened pencil is in the shape of a hexagonal prism, in which the face edge is 4 millimeters and the length is 170 millimeters. What is the lateral area of the pencil?

38. ## chemistry

a piece of metallic iron (10 moles) was dissolved in concentrated hydrochloric acid. the reaction formed iron (II) chloride and hydrogen gas. how many moles of iron (II) chloride were formed?

39. ## college algebra

An isotope of lead, 201Pb, has a half-life of 8.4 hours. How many hours ago was there 40% more of the substance? (Round your answer to one decimal place.) ____hr

40. ## Calculus

At 2:00pm a car's speedometer reads 60mph, and at 2:10pm it reads 65mph. Use the Mean Value Theorem to find an acceleration the car must achieve. Answer( in mi/h2):

41. ## Math

I run 1 3/4 miles each day. my friend runs 4 times as far as I do. how far does she run ?

42. ## Math

An architect designs a house that is 12 m wide. The rafters holding up the roof are equal length and meet at an angle of 68°. The rafters extend 0.6 m beyond the supporting wall. How long are the rafters? Hi - I was wondering if you could help me with

43. ## Chemistry

The dosage of technetium -99m for a lung scan is 20 uci/ kg of body weight. How many millicuries should be given to a 50.kg patient (1 mci=1000uci)

44. ## math

monica keeps a supply of dimes and quarters in her car for highway tolls.A week's supply of toll coins contains 10 more dimes than quarters and totals \$11.50. How many quarters does monica spend on highway tolls in one week? F. 26 G. 30 H. 36 I. 40

45. ## us history

"Although the economic growth of the United States between 1860 and 1900 has been attributed to a governmental policy of laissez-faire, it was in fact encouraged and sustained by direct government intervention." Assess the validity of this statement. What

46. ## college finite math

A product may be made using Machine I or Machine II. The manufacturer estimates that the monthly fixed costs of using Machine I are \$17,000, whereas the monthly fixed costs of using Machine II are \$14,000. The variable costs of manufacturing 1 unit of the

47. ## Chemistry

When disaccharide alpha is hydrolyzed, which monosaccharide units are produced? A) D-glucose and D-fructose monosaccharide units B) two D-fructose monosaccharide units C) two D-glucose monosaccharide units

48. ## Chemistry

A solution contains Cr3+ ion and Mg2+ ion. The addition of 1.00 L of 1.55M NaF solution is required to cause the complete precipitation of these ions as CrF3(s) and MgF2(s). The total mass of the precipitate is 49.9g .Find the mass of Cr3+ in the original

49. ## Physics

A 2000 kg car is slowed down uniformly from 18.0 m/s to 5.00 m/s in 4.20 s. (a) What average total force acted on the car during that time? (b) How far did the car travel during that time?

50. ## English/Grammar

Having trouble finding the simple predicates in the follwing sentences.. 1.They have destroyed some buildings. 2.The insects bodies can turn wood into food. 3.The insects damage property. 4. These insects eat wood. 5. Most of the insects are workers or

51. ## Physics

a cylinder of gas is at a room temp (20 c) the air conditioner breaks down and the tempture rises to 58c what is the new pressure of the gas relative to its initial pressure?

52. ## college math HELP!!!!!

The quantity demanded x each month of Russo Espresso Makers is 250 when the unit price p is \$180; the quantity demanded each month is 1000 when the unit price is \$150. The suppliers will market 750 espresso makers if the unit price is \$80. At a unit price

53. ## physics

A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 16.1 m/s at an angle of 41.1° above the horizontal. It rises to its maximum height and then falls down to the green.

54. ## Algebra

Kevin stuffs shrimp in his job as a seafood chef. He can stuff 1200 shrimp in 4 hours. When his sister helps him, they can stuff 1200 shrimp in 3 hours. If kevin gets sick, how long will it take his sister to stuff 600 shrimp?

55. ## Chemistry

Isoamyl salicylate (м = 208.25 g/mol) has a pleasant aroma and is used in perfumes and soaps. Which of the following combinations gives a 0.75 m solution of isoamyl salicylate in ethyl alcohol (d = 0.7893 g/mL)

56. ## Chemistry

A solution is made by mixing 37.0 mL of ethanol, C2H6O, and 63.0 mL of water.? Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C? ethanol: 0.789 g/mL 43.9 torr water : 0.998 g/mL 17.5 torr

57. ## college finite math

Cowling's Rule is a method for calculating pediatric drug dosages. If a denotes the adult dosage (in milligrams) and if t is the child's age (in years), then the child's dosage is given by D(t) = (t + 1/24)a (a) Show that D is a linear function of t. Hint:

58. ## physics

A copper cube, 0.31 m on a side, is subjected to two shearing forces, each which has a magnitude F = 6.40 106 N (see the drawing). Find the angle θ (in degrees), which is one measure of how the shape of the block has been altered by shear deformation.

59. ## College math HELP!!!!!

A financier plans to invest up to \$450,000 in two projects. Project A yields a return of 10% on the investment, whereas Project B yields a return of 15% on the investment. Because the investment in Project B is riskier than the investment in Project A, the

60. ## Math

Translate the phrase into an expression: 8 times the sum of 7 and y

61. ## Math

I have a 3 part question that I have the answers for but I am still having issues understanding it. Looking for help with the explanation / steps on how you would get the answer. Question 1) The width of a rectangular field is 3h yards and it's length is 3

62. ## math/geometry

A pentagon with the a perimeter of 45 feet , what is the area

63. ## physics

Tarzan wights 820N, swings from a cliff at the end of a 20m vine that hangs from a high tree limb and initially makes an angle of 22 degrees with the vertical. Immediately after Tarzan steps off the cliff the tension in the cine is 760N. Choose a

64. ## Chemistry

I need another hypothesis: Mom and I were baking a cake for my brother's birthday. We didn't have any baking powder. The recipe said to add one teaspoon of baking powder to the cake batter. Since that's such a small amount we baked the cake anyway. We were

65. ## Math

Needing help with the formula to be able to prove these answers to be correct. What are the steps ? Moesha's is ( 3G + 1 ) years old and Shanti is twice Moesha's age. A ) Find the sum of the ages of Moesha's and Shanti in2 years time. Answer The sum of

66. ## college finite math

Cowling's Rule is a method for calculating pediatric drug dosages. If a denotes the adult dosage (in milligrams) and if t is the child's age (in years), then the child's dosage is given by D(t) = (t + 1/24)a (a) Show that D is a linear function of t. Hint:

67. ## Math

What ratio represents the probability of drawing a red card from a standard deck of 52 cards?

68. ## Physics

In a vacuum, two particles have charges of q1 and q2, where q1 = +3.7 µC. They are separated by a distance of 0.22 m, and particle 1 experiences an attractive force of 3.5 N. What is q2 (magnitude and sign)?

69. ## math

The demand function for the Sicard wristwatch is given by the following function where d(x) (measured in units of a thousand) is the quantity demanded per week and x is the unit price in dollars. d(x) = 50 0.01x2 + 1 (0 ≤ x ≤ 20) (a) Find d'(x). d'(x)

70. ## college algebra

In 4 years, 30% of a radioactive element decays. Find its half-life. (Round your answer to one decimal place.) _____ yr

71. ## Chemistry

Use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. I absolutely have no idea what to do, please

72. ## geometry

Find the weight to the nearest kg, of the cement block. Cement weighs 1700 kg/m3. 12cm x 10cm and 40cm x 20 cm x 20cm.

73. ## math

Suppose the cost function associated with a product is C(x) = cx + F dollars and the revenue function is R(x) = sx, where c denotes the unit cost of production, s the unit selling price, F the fixed cost incurred by the firm, and x the level of production

74. ## Science

In a wheelbarrow, you have 2 kilograms of soil for your garden. If 8 percent of it is organic matter( decayed materials from organisms), how many grams of organic matter do you have?

75. ## Chemistry

Theoretically how many grams of malachite should be formed when 1.5 moles of Copper Sulphate reacts with an excess of sodium carbonate?

76. ## College Algebra

A bank credit card charges interest at the rate of 23% per year, compounded monthly. If a senior in college charges \$1,700 to pay for college expenses, and intends to pay it in one year, what will she have to pay?

77. ## physics

An electric heater used to boil small amounts of water consists of a 25-Ω coil that is immersed directly in the water. It operates from a 60-V socket. How much time is required for this heater to raise the temperature of 0.50 kg of water from 29° C to

78. ## Physics

A ladder (L = 7.80 m) of weight WL = 360 N leans against a smooth vertical wall. The term "smooth" means that the wall can exert only a normal force directed perpendicular to the wall and cannot exert a frictional force parallel to it. A firefighter, whose

79. ## physics

A navy jet with a weight of 231 kN requires an airspeed of 85 m/s for liftoff. The engine develops a maximum force of 107 kN, but that is insufficient for reaching takeoff speed in the 90 m runway available on an aircraft carrier. What minimum force

80. ## Taxation

"Sally W. Emanual had the following dividends and interest during the current year. Acorn Corporation bond interest \$700 City of Boston bongs interest 1,000 Camp Bank interest 1,250 Jet Corporation dividend(Qualified) 1,300 North Mutual fund Capital gain

81. ## Physics

The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the drawing, find (a) the x coordinate and (b) the y

82. ## science

How mny moles of Mg would you need to react with 2.5 moles of O2?

83. ## physics

An 845 N sled is pulled a distance of 180 m. The task requires 1.38 x 104 J of work and is done by pulling on a rope with a force of 122 N. The rope is held at _____° above the horizontal.

84. ## mat 116/algebra

A cylinder has a radius of 5 in. If the volume of the cylinder is 250ƒà in.3, what is the height of the cylinder? [Hint: The volume of a cylinder is given by V = ƒàr2h.] I think I wrote it wrong the first time. The volume of a cylinder is pi r^2 h.

85. ## Math

How do you write the product as a product of a whole number and a unit fraction of 3×4/5 equals

86. ## English

One way an English sonnet is different from a Petrarchan sonnet because an English sonnet contains A couplet < A sestet Give quatrains None of the above

Prove that the triangles with the given vertices are congruent. A(3, 1), B(4, 5), C(2, 3) D(-1, -3), E(-5, -4), F(-3, -2) a The triangle are congruent because triangle ABC can be mapped to triangle DEF by a rotation. (x,y)--->(y, -x) Followed by a

88. ## physics

An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.

89. ## statistics

Musical styles other than rock and pop are becoming more popular. A survey of college students finds that 48% like country music, 30% like gospel music, and 10% like both. What is the conditional probability (±0.01) that a student likes gospel music,

90. ## social studies

what kind of landform covers the central part of North America

91. ## college math HELP!!!!!

CalJuice Company has decided to introduce three fruit juices made from blending two or more concentrates. These juices will be packaged in 2-qt (64-oz) cartons. One carton of pineapple-orange juice requires 8 oz each of pineapple and orange juice

92. ## Math

An airplane in Australia is flying at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of

93. ## math

1. Put these rational numbers in order from smallest to largest. 3/4= 0.75, 2/7=0.287, 2/10=0.2, 5/8= 0.66, 8/4=2 2/10, 2/7, 5/8, 3/4, 8/4 ? 2. Order the numbers from least to greatest. 1.5, 3.25, 1.66, 3.33, 2.4 A)1.5, 1.66, 2.4, 3.25, 3.33

94. ## Jewelry markings

I have a diamond ring with the marks "KOBI 14K" inside. I know what the 14K stands for; but, what does the "KOBI" mean?

95. ## math

an unbiased coin is tossed six times. find the probability of the given event. the coin lands heads more than once.

96. ## Physics

Two objects with masses of 3.00 kg are connected by a light string that passes over a frictionless pulley.what is the distance each object will move in the first second of motion if both objects start from rest.

97. ## MATH

A REGULAR PENTAGON ABCDE AND A SQUARE ABFG ARE FORMED ON OPPOSITE SIDE OF AB. FIND ANGLE BCF..

98. ## Calculus

Using f(x), determine a formula for the Riemann Sum S_n obtained by dividing the interval [0, 4] into n equal sub-intervals and using the right-hand endpoint for each c_k. f(x)= 5x+2 Now compute the limit as n goes to infinity S_n to compute the area under