# 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

asked by Rajiv
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

asked by Jenny
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

asked by KIM
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?

asked by john
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?

asked by Jesus
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

asked by Sharon
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.

asked by KDIZZLE
8. ## Maths

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

asked by T1
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

asked by Anonymous
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?

asked by Anonymous
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

asked by urgent !!!!!!!!!
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

asked by Bellkis
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

asked by Sharon
14. ## computers

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

asked by David
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.

asked by Faw
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

asked by Patrick
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.

asked by karl
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

asked by Epson
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

asked by Firdous
20. ## Geometry

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

asked by me
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?

asked by KDIZZLE
22. ## Life orientation

what are factors tha encourage enviromental hazzard:pollution?

asked by dikeledi
23. ## worls history

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

asked by yaya flores
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?

asked by Anthony
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

asked by Anonymous
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:

asked by Sharon
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.

asked by Koala
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

asked by Ahmed
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).

asked by me
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

asked by Sydney
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

asked by Nan
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

asked by karl
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

asked by Nan
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?

asked by Misha
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

asked by Firdous
36. ## psychology

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

asked by godfrey
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?

asked by john
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.

asked by Amanda
39. ## psychology (check answer)

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

asked by Amanda
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

asked by vincent
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

asked by Ashley
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

asked by Jeffery
43. ## CHECK PLEASE !!

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

asked by Matt
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 ?

asked by Feras
45. ## algebra 2

y = 4x2 - 12x + 9

asked by serg
46. ## algebra

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

asked by ocieseanna
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

asked by Pratima
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?

asked by Feras
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

asked by bio
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

asked by Liz
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

asked by Amy
52. ## medical billing and coding

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

asked by Mechelle
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

asked by Nan
54. ## Maths

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

asked by Anonymous
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

asked by Nan
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.

asked by Anonymous
57. ## math

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

asked by Marie P.
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

asked by Arial
59. ## Criminal Law

points of similarities between Federal and State Law.

asked by slomomo
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

asked by Nan
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

asked by Shane
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?

asked by Feras
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.

asked by Patrick
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

asked by Coralie
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.

asked by Nan
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

asked by Anonymous
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

asked by Nan
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

asked by Feras
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?

asked by Zubi
70. ## ogive-maths

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

asked by cee
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

asked by vincent
72. ## Math

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

asked by Janelle
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?

asked by Anonymous
74. ## spelling mistakes

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

asked by kruthiga.k
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 ?

asked by Lisa
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

asked by Daniella
77. ## Math

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

asked by Whitney
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

asked by vincent
79. ## Math

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

asked by Zippy
80. ## Criminal Law

What do you know about the classification of criminal law?

asked by slomomo
81. ## algebra

z=yn y=

asked by lynn
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

asked by Amy
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

asked by Amy
85. ## Math 221

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

asked by Lisa
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?

asked by Nan
87. ## Algebra 2

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

asked by Nan
88. ## Math

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

asked by Hoor
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.

asked by Anonymous
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?

asked by Nan
91. ## Math 221

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

asked by Lisa
92. ## Algebra 2

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

asked by Nan
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

asked by Nan
94. ## Math

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

asked by Hoor
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

asked by Lisa
96. ## ENG1511

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

asked by sylas
97. ## Algebra 2

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

asked by Nan
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

asked by thomas
99. ## mathematics

P=2(l+b) the length of a rectangle given the perimeter

asked by pinky
100. ## math

12.5= 3/k how do u solve k?

asked by scott