# Questions Asked onAugust 7, 2014

1. ## Physical chemistry

A mixture contains n2o4 and No2 in the ratio 2:1 by volume what is the vapour density of the mixture.Pls answer the question i have been on the question for 2 hrs by now tried solving using mole fraction ideal gas equation an using the formula molar mass

2. ## History

Advantages and disadvantages that ethnic neighborhoods offered to their residents? I previously did an essay of advantages and disadvantages of immigration to the U.S. and when I search online I am getting the same answers. So I am scared I answered one of

3. ## DENTAL ASSISTANT HELP PLEASE!!!!!!

1)Each state has a dental board of examiners responsible for enforcing that particular state's Dental Practices Act (DPA). The DPA contains similar requirements for dentist conduct. Which of the following is not covered by the DPA? A. Americans with

4. ## math

The ratio of boys to girls in a class room was 9:8. Half of the girls left the classroom, and then there were 15 more boys than girls. A. How many children were in the classroom in the beginning B. How many girls left the classroom?

5. ## Chemistry

A 10.00-mL sample of 0.1000 M KH2PO4 was titrated with 0.1000 M HCl Ka for phosphoric acid (H3PO4): Ka1= 7.50x10-3 ; Ka2=6.20x10-8 ; Ka3= 4.20x10-10 Calculate the pH after addition of 10.00 mL of HCl to the KH2PO4 solution?

6. ## MATH(HELP)

The ratio of guppies to angelfish in a shop was 2:3. The number of angelfish was 2/3 the number of gold fish. The shoe keeper decided to replace 1/4 of the guppies with some angelfish. The number of angelfish she added was equal to the number of the

7. ## MATH

At one college, GPA’s are normally distributed with a mean of 2.9 and a standard deviation of 0.6. Find the 70th percentile.

8. ## Maths

A 5kg bag of apples costs R65 what is the cost of 500 grams of apples

9. ## Physics

A gun is fired parallel to the ground. At the same instant, a bullet of equal size and mass next to the muzzle is released and drops to the ground. Which hits the ground first and why? I think that the bullets will hit the ground at the same time because

10. ## Chemistry

HNO3 used as a reagent has a specific gravity of 1.42 g/ mL and contains 70% by strength HNO3. Calculate: Volume of acid that contains 60 g pure acid? Volume of water required to make 1 molar solution from 2 mL concentrated HNO3?

11. ## physics

A block of mass m takes time t to slide down on a smooth inclined plane of angle of inclination theta and height h. If same block slids down on a rough inclined plane of same angle of inclination and some height and takes time n times of initial value then

12. ## Chemistry

If 5.4 moles of methane react with 3.5 moles of oxygen gas, how much carbon dioxide will be produced? Use the following equation: CH4 + 2O2 = CO2 + 2H20

13. ## MATH(HELP)

The ratio of guppies to angelfish in a shop was 2:3. The number of angelfish was 2/3 the number of gold fish. The shopkeeper decided to replace 1/4 of the guppies with some angelfish. The number of angelfish in the end. How many guppies were in the shop in

14. ## computers

when you connect to a remote VPN server with your laptop running windows 8 what key item is your computer allocated

15. ## math

two points A and B 80 ft. apart lie on the same side of a tower and in a horizontal line through its foot. if the angle of elevation of the top of the tower at A is 21 degree and B is 46 degree, find the height of the tower.

16. ## statistics

The mean lifetime of a sample of 100 light tubes is 1570 hours with a standard deviation of 80 hours test the hypothesis that the mean lifetime of the tubes is 1600 hours

17. ## trigonometry

A barge is being towed south at the rate 2 km/hr. A man on the deck walks from west to east at the rate 4ft/s. Find the magnitude and direction of the man's actual velocity.

18. ## mathematics word problems

Club members wrote a program together, with several people working on each of 4 parts. If the first part of the program required 1/3 of the total time, the second part needed 1/2 of the remaining time, the third part took 30 minutes, and the fourth part

19. ## Algebra

A mural made of triangular tiles has an area of 1750square centimeters.each triangle has a height that is 3 centimeters longer than its base of 2 centimetrs.how many triangular tiles are there

20. ## Geometry

What is the probability of drawing three red cards, one at a time without replacement, from a standard deck of 52 cards?

21. ## sTATISTICS

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, approximately what percentage of light bulbs has a life of more than 3000 hours?

22. ## Life orientation

what are factors tha encourage enviromental hazzard:pollution?

23. ## worls history

How can i start a essay of frensh revolution and what would be the best person or event to write about??

24. ## Math

Suppose a child is sitting 5 feet from the fulcrum. Where does a 175 pound adult need to sit for the seesaw to be balance?

25. ## physics

A particle undergoes two displaments , measured from the positive x-axis, with counterclockwise positive.The first has a magnitude of 11 m and makes an angle of 88 with the positive x-axis. The resultant displacement has a magnitude of 6.8 m direceted at

26. ## math

On a plane trip, baggage over 41 pounds is charged at the rate per pound of 1% of the one-way fare. The charge for a bag weighing 52 pounds on a trip where the one-way fare is \$98 is:

27. ## statistics

A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.

28. ## math

a quart is approximately sixty cubic inches. a cubic feet of water weighs approximately sixty pounds. therefore, a quart of water weighs, approximately

29. ## geo

A line contains the points (8, 9) and (–12, –7). Using point-slope form, write the equation of the line that is parallel to the given line and that passes through (–5, –15).

30. ## Environmental Science

H.B.D. Kettlewell observed that peppered moths in the forests of England were becoming darker in color over time. In addition, he observed that pollution had turned the tree trunks black. He thought it would be easy for birds to spot and capture

31. ## Algebra 2

The sequence is defined by a recursion formula. Write the first four terms of the sequence: a_1=9; a_n=3a_n-1

32. ## trigonometry

A box of 200kN is placed on a smooth inclined plane 28° with the horizontal. To prevent the box from sliding down the plane, a rope is tied to it and fastened to a peg on the top of the incline as shown. Determine the pull on the string assuming that the

33. ## Algebra 2

Recursion formula for a given population for each interval,n, at a time, and k is a constant called the Malthusian factor: a_n=ka_n-1(1-a_n-1) - Assuming n is measured in weeks, calculate the insect population for weeks 2, 3, and 4 if the initial

34. ## Maths

What is the largest three-digit number with the property that the number is equal to the sum of its hundreds digit, the square of its tens digit and the cube of its units digit?

35. ## Algebra

At 8Am population of bacteria is 100,at 10Am population of bacteria is 200,At 12PM population of bacteria is 400,At 2PM population of bacteria is 800.If the pattern continues what will the bacteria population be at 6.00 pm

36. ## psychology

A developmental psychologist who stresses the importance of the social clock would be likely to agree that:

37. ## math

The base of a triangle is 11. The other two sides are integers and one of the sides is twice as long as the other. What is the shortest possible length of a side of the triangle?

38. ## Human Sexuality

Diseases most frequently found to have adverse effects on sexual functioning include all of the following EXCEPT: a. Multiple sclerosis or stroke. b. Diabetes, cardiovascular disease, and heart attacks. c. Arthritis. d. Asthma.

Adolescent women are most likely to use contraception: a. During their first experience of sexual intercourse. My answers is A b. If they already have one baby. c. If they have been involved in a steady relationship. d. If they have just met their sexual

40. ## math

4. A board jumper makes an average standing jump of 8 feet. In how many jumps will he cover y yards? I got B for this question. A.3y/8 B.8/3y C.24y D.1/24y E.24/y

41. ## math

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

42. ## math

On Saturday, Alberto filled his right rear tire with air at the gas station around the block from where he lives. Three days later the tire pressure in that tire measured 26 psi (pounds per square inch). On the following Saturday, one week after he had

i think its growth ~ The leaves on a green plant soak up sunlight to make food. A cow's stomach digests grass that was eaten. These are examples of which characteristic of life? A. growth B. homeostasis C. metabolism D. heredity

44. ## Math

A square measures 12 cm x 12 cm and is divided into four equal squares.If equal circles inscribed within each of the four squares, what is the circumference of each circle ?

45. ## algebra 2

y = 4x2 - 12x + 9

46. ## algebra

five minus twice the square of a number Algebraic expression: Factors: Constantas: Terms: Coefficients

47. ## Biology

Should the point (0,0) be plotted on this graph? Average Temperatures in Degrees F. (1)Jan 52 (2)Feb 57 (3)Mar 65 (4)Apr 73 (5)May 80 (6)June 87 (7)July 89 (8)Aug 88 (9)Sept 82 (10)Oct 73 (11)Nov 63 (12)Dec 55 This data represents a repeating cycle. Should

48. ## Math

A rectangle has a length of 6 cm in an area of 24 cm². If the radius of a circle is as long as the width of the rectangle ,what is the circumference of the circle?

49. ## molecular biology

To confirm that the recombinant plasmids obtained were exactly what you wanted, you need to determine the DNA sequence of the PCR products found in several of the recombinant plasmids. To do this, you use the primer 5'-CACG-3'. You carry out a set of four

50. ## Chemistry

I am to do an equilibrium constant lab and I am supposed to only find the Kc value. i have to find the equilibrium constant for NaHCO3 (s) NaOH (s) + CO2 (g) at 800K. The partial pressure in the bulb reads 420 kPa on the manometer, 1 gram of NaHCO3 was

51. ## Technology

The project designed to clothe soldiers in order to fight the wars of tomorrow is called: A. Future Soldier 2025. B. Situational Awareness. C. Star Wars. D. Land Warrior. is it A

52. ## medical billing and coding

which one of the following pieces of information would be part of a limited data set?

53. ## Algebra 2

The sequence is defined by a recursion formula.Write the first four terms; a_1=-5; a_n=2a_n-1 +7

54. ## Maths

1) -_/a^3 2) _/_/a 3) _/^3_/64a^6b^12

55. ## Algebra 2

The sequence is defined by a recursion formula. Write the first four terms of the sequence; a_1=0; a_n=5a_n-1 +7

56. ## HISTORY

The richest discovery in the history of mining occurred in 1873. This so-called "Big Bonanza" made _______ the richest man in the world.

57. ## math

When modeling data we make ______ plot to help us visually determine whether a line or some other curve is appropriate or not.

58. ## Science

Imagine that you are part of a research team that is working to control the spread of the Japanese beetle. This is an insect pest from Japan first discovered on the east coast of the United States in 1916. Since that time it has been spreading slowly south

59. ## Criminal Law

points of similarities between Federal and State Law.

60. ## Algebra 2

The sequence is defined by a recursion formula, write the first four terms of the sequence; a_1=100; a_n=1/2a_n-1 +4

61. ## chemistry

A 25 mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added util the indicator changed colour. It was found that 28 mL of the alkali was used. (a) What colour was the solution in

62. ## Math

A rectangle has a length of 6 inches and an area 18 inches. If the radius of the circle is equal to the width of the rectangle what is the area of the circle?

63. ## statistics

The mean sleep time of babies is 14hrs,a sample of 64 babies showed a mean of 13hrs 30min with a standard deviation of 3hrs at 1% level of significance. Test the assertion that the mean sleep of the babies is less than 14hrs a day.

64. ## english

In The Alchemist by Paulo Coelho, there is a quote that says, "When you want something with all your heart, that's when you are closest to the Soul of the world. It's always a positive force." I'm stuck on trying to find the meaning behind this quote. I'd

65. ## Algebra 2

For each sequence, write the next four terms 1. 36,12,4,4/3... I know that the pattern in that the term is divided by 3, but I have no idea how to calculate/write the next four terms.

66. ## trig

the angle of from the top of a 41 fdepression as measured oot tower to a reference point on the ground is 65 degrees. How far away, to the nearest foot, is the reference point from the base of the tower

67. ## Algebra 2

Year: 1, 2, 3, 4, 5 Sale:.48,1.032,2.198,4.726,10.208 (in millions) -If the sales growth pattern continues, what will be the sales for ABC Company in year 12? -What will be the total sales for ABC Company for years 1 through 12? I know that this is a

68. ## Math

A Circle has an area of 25 pie centimeter squared.If one side of the square is the same length as the radius of the circle,what is the perimeter of the Square? F 20 cm G 25 cm H 50 cm J 75 cm K 100 cm

69. ## Physics

a bus travels from one point to another wuth a speed of 40km/h and returns with a speed of 60km/h.what is e average speed and average velocity of the bus?

70. ## ogive-maths

what are ogives? Please briefly explain what goes on with regard to ogives

71. ## math

3. A diamond ring valued at \$7000 was insured at 80% of its value. What was the premium, if the rate was \$6 per 1000? A.\$3.36 B.\$4.20 C.\$33.60 D.\$42.00 E.\$336.00

72. ## Math

5[5m-(m+8)]> -4(m-1) Solve

73. ## physics

a bus travels from one point to another wuth a speed of 40km/h and returns with a speed of 60km/h.what is e average speed and average velocity of the bus?

74. ## spelling mistakes

theree guest lectures come from CMC hospital to give the trainee and her fellowmates a common introduction above community developement.

75. ## Math

In a program,class 7 students planted as many trees as their number in class. If total planted trees =144.Find how many students were there ?

76. ## physics 2

- Matter is made of charged particles - The motion of charged particles produces electromagnetic waves - Since light is an electromagnetic wave, the color of a substance is ultimately related to the way that charged particles in that substance can move

77. ## Math

Simplify. (a) 2^3(5)^-2 =? (b) 2^-3/a^4 = 2^3a^4 =8a^4????

78. ## math

2. A grocer paid \$2600 for secondhand delivery truck. At end of 4 1/2 years he was allowed \$440 for it toward the purchase of a new truck. What was the average yearly amount of depreciation? A.\$220 B.\$450 C.\$480 D.\$550 E.\$2200

79. ## Math

The list below contains the 6 factors of which two-digit number? 6, 2, 9, 3, 1 ______

80. ## Criminal Law

What do you know about the classification of criminal law?

z=yn y=

82. ## physics 2

- Matter is made of charged particles - The motion of charged particles produces electromagnetic waves - Since light is an electromagnetic wave, the color of a substance is ultimately related to the way that charged particles in that substance can move

asked by lost physics 2 student
83. ## Tech

The company that put the "stealth" in the stealth bomber was: A. Lockheed Martin. B. Grumman. C. Northrup. D. Boeing. is it C

84. ## Tech

If a company produces something and is able to dominate the market as a result, that company would be called: A. a sponsor. B. a Dominant Client. C. a Monopolistic Maker. D. a manufacturer. is it B

85. ## Math 221

9w-w^3 I need someone to explain how do I factor this problem

86. ## Algebra 2

For the following sequence, determine the indicated geometric means; 180,_,_,_,_,-5.625,... I could hardly even calculate this! Anyone have a better idea?

87. ## Algebra 2

Is this sequence arithmetic,geometric, or neither? -111,2.5,115.5

88. ## Math

4:00 in the evening 10:00 during the day Are these times a. m. Or p. m.

89. ## physics

Show that the critical velocity of body revolving in cercular orbit very close to the surface of a planet of radiuis R and meandencity.

90. ## Algebra 2

Find the sum of the first 12 terms of this sequence: 9,4.5,2.25,... I believe that the pattern is dividing the term by 2,and I keep getting 7.9956 for the sum, but that is incorrect. Anyone understand this?

91. ## Math 221

9w-w^3 I need someone to explain step by step how do I factor this problem

92. ## Algebra 2

Is this sequence arithmetic, geometric, or neither? 3,10,31...

93. ## Algebra 2

A species of bees make hexagonal, 6 sided, honeycombs.The bees begin with on hexagonal cell then make successive rings of hexagonal cells around the initial cell. Make a table of values for the number of cells in each of the first 8 rings (1st ring, 2nd

94. ## Math

Are these times a. m or p. m. 9 minutes to 12 noon 8 minutes to midnight

95. ## Math 221

Need help please explain how to get the answers for these two factoring problems and for the second problem with the "ac method". 2a^2+1+3a 15x^2+31x+2

96. ## ENG1511

skimming and scanning from part of the ......... reading strategies

97. ## Algebra 2

-S_16 for the series 5+20+80+...

98. ## math

If x = 1/x^2, then 2 + 3 = a. 13/36 b. 1/5 c. 5/6 d. 1/8 e. 5/13 please answer and show work