# Questions Asked onMarch 19, 2014

1. ## Chemistry

The energies, E, for the first few states of an unknown element are shown here in arbitrary units: n= 1, E=-21 n=2, E=-9 n=3, E=-4 n=4, E=-3 ...,... infinity, 0 A gaseous sample of this element is bombarded by photons of various energies (in these same

2. ## Physics

Calculate the force of friction that keeps a 80-kg person sitting on the edge of a horizontal rotating platform when the person sits 2.4m from the center of the platform and has a tangential speed of 3.2m/s . Express your answer to two significant figures

3. ## math

Mr.Ricci spent 1/3 of his salary on food and 2/5 of the remainder on transport. What fraction of his salary did he have left? If he had \$600 left, find his salary.

4. ## trig

cos/sin use 2npi and tan uses npi, but how do you know when to add 2npi or npi to the solution of the equation?

5. ## Math (algebra)

Could you help me with this math question: A can in the shape of a right circular cylinder is required to have a volume of 500 cubic centimeters. The top and bottom are made of material that costs 11 cents per square centimeter, while the sides are made of

6. ## Physics

A Plane flies north at 215 km/h. A wind from the east blows at 69km/h. What is the plane's new velocity with respect to the ground in standard position

7. ## Math (algebra)

Hi could you please help me with this algebra question. A rectangle has one corner on the graph of y=36-x^2, another at the origin, a 3rd on the positive y-axis, and the fourth on the positive x-axis. Express the area A of the rectangle as a function of x.

8. ## Organic Chemistry

Draw every stereoisomer for 1-bromo-2-chloro-1,2-difluorocyclopentane. Use wedge-and-dash bonds for the substituent groups, and be sure that they are drawn on the outside of the ring, adjacent to each other.

9. ## ratio

given the proportion a/b=5/19, what ratio completes the equivalent proportion a/5= / ? a. a/19 b. b/19 c. 5/19 d. 19/b

10. ## Finance

Anderson International Limited is evaluating a project in Erewhon. The project will create the following cash flows: Year Cash Flow 0 –\$690,000 1 243,000 2 175,000 3 256,000 4 231,000 All cash flows will occur in Erewhon and are expressed in dollars. In

11. ## Algebra ll

Help please, I don't understand how to do this... Give an example of an arithmetic sequence that is found in the real world. Find the common difference and write a recursive and iterative rule for the sequence. Use one of the rules to find another term of

12. ## Chemistry

What mass of lithium (in g) is required to react completely with 57.5mL of N2 gas at STP? Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)→2Li3N(s)

13. ## Physics

Prove that tanø is equal to U(k) when the block slides down the incline with a constant speed. (Use symbols, not numbers.)

14. ## English

Posted by rfvv on Wednesday, March 19, 2014 at 2:24am. 1. It's very noisy here. I can't stand it any more. (What does "it" refer to in the first sentence? What does "it" refer to in the second sentence? Are both the same? Is 'it' an impersonal pronoun or

15. ## MATH QUIZ PLS HELP!!!

1.Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ©£ and round to the nearest tenth. 439.6 ft^2 324.5 ft^2 571.5 ft^2 285.7 ft^2*** 2.Find the surface area of a square pyramid with a base length of 24 cm

16. ## Heath/Wellness

Write a 300-500 word essay. Provide three examples of sporting events, or fitness activities, with which you have been involved. Describe what energy pathway was used in that sport or activity and explain why you are matching the pathway with the activity.

17. ## chemistry

Knowing the concentration of a solution allows us to find all of the following except A. the mass of a solute. B. the mass of the solvent. C. the volume of the solvent. D. the concentration of a solution when conditions change.

18. ## chemistry

*the molar solubility of BaCo3 in 0.50M Bacl2 solution IS?ksp(1.6*10^-6) I CALCULATED AND GOT 3.2*10^-9 WANT TO MAKE SURE IF IT CORRECT

19. ## Chemistry

KClO3 = KClO4 + KCl What is the conversion factor to convert between moles of potassium chlorite and moles of potassium perchlorate?

20. ## phsyics

A car races on a circular track of radius r. (a) Write an equation for the car's average speed when it travels a complete lap in time t. (b) The radius of the track is 100 m and the time to complete a lap is 14 s. Show that the average speed around the

21. ## math

Bonita bought 2 and 1/5 kg of potatoes and 1 and 1/2 kg of carrots. How much more potatoes than carrots did she buy?

22. ## math help

I am a closed shape made of 6 line segments. I have 2 angles less than a right angle and no right angles. What shape am I? Draw an example in the workspace.

23. ## math help!

f(x) is a quadratic function such that f(1) = 3 and f(5) = 3. Find the x coordinate of the vertex of the graph of f.

24. ## Physics

A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision? Answer a. 0.394 kg·m/s

25. ## Math - PreCalc (12th Grade)

Jake has decided upon three business ventures to invest in. The total cost of investing in all three ventures will be \$15,000. Investing in the first venture will cost \$3,000 more than investing in both the second and the third venture. According to

26. ## math

A water heater has a diameter of 18 inches. It sits in a drain pan that has a diameter of 22 inches and a height of 2 inches, as modeled in the diagram below. Water that leaks out of the water heater sits in the drain pan. Which of the following is closest

27. ## Math

suppose you have 2 dimes ad 3 quarters in a bag. You shake it so that 2 coins fall out. 1) What is the probability that both coins are quarters? 2) both coins are dimes? 3) both coins are the same? 4)you shake out one of each coin?

28. ## Physics!

Consider someone in a rotating space habitat. The outward force felt by the person A.has no reaction counterpart B.is an interaction with Earth C.is a form of gravity D.is real in the traditional sense

29. ## physic

A 47.5-g golf ball is driven from the tee with an initial speed of 41.8 m/s and rises to a height of 34.5 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 8.88 m below its

30. ## Math: Statistics Least squares line

Find an equation of the least squares line, then use it to complete the table. X- 111 169 230 287 335 ? Y- 2 3 4 5 6 7 Extrapolation I missed the lesson on this and as far as I can tell I think the least squares line is y= .01764x+ .oo693 If anyone could

31. ## Chemistry

Calculate the pH of a solution in which a. [H3O+] = 7.8 x 10-7 M pH = b. [H3O+] = 5.1 x 10-6 M pH = c. [H3O+] = 6.1 x 10-5 M pH = d. [H3O+] = 9.3 x 10-4 M pH = I get 8.1 9.5 9.1 6.7 but its wrong please someone help!

32. ## psychology

the cognitive psychology is primarily concerned with

asked by art and social sceince
33. ## psychology

TMA: TMA1/CSS121

asked by art and social sceince
34. ## Chemistry

A saturated solution of MgF2 at 23 degrees C was prepared by dissolving solid MgF2 in 1 L water. The Ksp of MgF2 is 1.5e-5. a.)Calculate the mass of MgF2 dissolved. b.) When .1 mols of solid KF was dissolved in the MgF2 solution, precipitation was

35. ## phsyics

An airplane with an airspeed of 60 km/hr lands on a runway where the wind speed is 40 km/hr. (a) What is the landing speed of the plane if the wind is head-on? (b) What is the landing speed if the wind is a tailwind, coming from behind the plane?

36. ## Chemistry

Last week we drew Lewis dot structures of azide (N31-), a crucial component in automobile collision safety airbags. During an impact, a sensor ignites a detonator cap that sets off the following rapid reaction: 2NaN3(s) â†’ 2Na(s) + 3N2(g) Part A What

37. ## chemistry

a gas with a volume of 4.00 L at pressure of 205kPa is allowed to expand to a volume of 12.0L. what is the pressure in the container if the temp remains constant

38. ## Chemistry

1. A chemist prepares a solution by dissolving 4.603 g of NaNO3 in enough water to make 200 mL of solution. What molar concentration of sodium nitrate should appear on the label? Answer in units of M 2.If the chemist mistakenly makes 225 mL of solution

39. ## pharmacy tech

. To find out if a drug causes nausea, you would look in this section of the drug monograph

40. ## math (check)

find the volume of a cylinder with a diameter of 16mm and a height of 5.7. A.2,292mm^3 . . . 4,584mm^3(i think its this one) . . . 689mm^3 . . . . 1,146 (but i also got an answer close to this but the tens place was 5)

41. ## MATH

BRIANNA HAS 4 PINK BRACELETS

42. ## Physical Science

When mixing colors of light, why does combining a secondary color with its complementary color give white light? I can't find the answer in my book, please help!

43. ## Human relations

A female doctor attempting to explain to her 27-year-old male patient that his severe acne can be cured with a specific drug, but the side effect of the drug might be that he will be temporarily bald.

44. ## chemistry

Calculate the H3O+ concentration present in water under the following conditions. Enter your answer in scientific notation. a. [OH-] = 2.8 x 10-7 M b. [OH-] = 8.8 x 10-3 M c. [OH-] = 2.4 x 10-11 M everytime I do the problem In the calculator I get system

45. ## English

1. Today is April 15th. 2. Today will be sunny and warm this afternoon. (Are both grammatical?)

46. ## us history

Hello! Can you please help me?? 1. In the 1800s, there was a wave of religious fervor known as the () Religious Right. (x) Second Great Awakening. () Religious Awakening. () Revival Times. 2. What movement called for drinking little or no alcohol? ()

47. ## Chemistry

What is the concentration of hydronium ions in a solution that is 0.12 M HBrO(aq) and 0.160 M NaBrO(aq)?

48. ## math

of the total number of spectators at a circus show, 1/4 are men. 2/5 of the remaining number of spectators are women. there are 132 women at the circus show. how many children are at the circus show? I don't know what to do help me!!! :-(

49. ## Chemistry

The reaction OH- + NH4+ = H20 + NH3 is kinetically first order in both reactants' concentrations. The rate constant is 2e10 1/M s. If 50 ml of .01 M NaOH is mixed with 50 ml of .01 M NH4CL, find the time required for the OH- concentration to reach 1e-4 M.

50. ## biology

In chickens, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). The mechanism for inheritance of the sex chromosomes is exactly the same as for X and Y sex chromosomes in other species. In chickens the character of

51. ## Chemistry

I'm having trouble trying to figure out how to setup and solve these problems: 1) 2,600.0 mL of air is at 20.0C. What is the volume at 60.0C? 2) A gas occupies 900.0 mL at a temperasture of 27.0C. What is the volume at 132.0C? 3) What change in volume

52. ## Math - PreCalc (12th Grade)

What is the left-hand limit of f(x)=|x−3|/x−3 as x approaches 3? A) 1 B) 2 C) 0 D) -1 E) -2

1. what would you expect the pH value for grapefruit juice to be? (>7, 7,

54. ## science

When a switch is turned from the off to the on position, it is changing the circuit in which of the following ways?

55. ## statistic****help*****

if three coins are tossed, what is the number of equally likely outcomes? 3 4 6 8 9

56. ## biology

What graphic could you use to best show the checkpoints in the cell cycle? a. line graph b. bar graph c. flowchart d. map I'm not sure, I think it's c?

57. ## Algebra Based Physics

A 2.50-kg steel ball strikes a massive wall at 10.0 m/s at an angle of θ = 60.0° with the plane of the wall. It bounces off the wall with the same speed and angle (see the figure below). If the ball is in contact with the wall for 0.224 s, what is the

58. ## Science

If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can

59. ## A Peculiar Question

Is either a B+ or an A- considered a terrible grade? If I received a B+ for two essays that I was assigned and then an A- for another, will these grades ultimately cause a decrease in my GPA? I want to enter into either a film or art college, and I want to

60. ## math

Factor out the greatest common factor in each question. 1. 7× + 21 2. 12n - 9 3. 10c + 30 4. 10b + 25

61. ## Description

Which of the following sentences are considered as a description of the terms "active voice" and "passive voice"? "Sentences written in the active voice are often less wordy and more direct than those written in the passive voice." Or "A verb in the active

62. ## Geography Answer Evaluation (Ms. Sue)

Which four seas border Italy? My answer: The Adriatic, Ionian, Ligurian, and Tyrrhenian Seas border Italy.

63. ## College Math

In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology

64. ## physics

A force in the +x-direction with magnitude F(x)=18.0N−(0.530N/m)x is applied to a 7.60kg box that is sitting on the horizontal, frictionless surface of a frozen lake. F(x) is the only horizontal force on the box. If the box is initially at rest at x=0,

65. ## Chemistry

I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

66. ## Chemistry

what is the mass in grams of one molecule of water?

67. ## Math Polygons

I am a closed shape made of 6 line segments. I have 2 angles less than a right angle and no right angles. What shape am I? Draw an example in the workspace.

68. ## maths

5^(logx) + x^(log5) = 50 . Find x

69. ## Grammar

What is the part of speech of the word "bliss"?

70. ## Math

Mrs. Meier had 3/5 kg of sugar. She used 1/4 of it to make cookies. How much sugar did she use to make the cookies?

71. ## Chemistry

Determine the speciﬁc heat of a material if a 34.7 g sample absorbed 45.2 J as it was heated from 293 K to 318 K. Answer in units of J/g · K Your answer must be within ± 2.0%

72. ## math

Danny bought 6 packets of drink. Each packet contained 1/4 liter of drink. Find the total amount of drinks in liters.

73. ## Chemistry

If 689000 J of energy are added to 4.00 L of water at 284 K, what will the ﬁnal temperature of the water be? Answer in units of K

74. ## Physics

A 11 kg box slides 4.2 m down a frictionless ramp and then collides with a spring whose spring constant is 250 N/m. What is the maximum compression of the spring? I got 1.35 m but it is incorrect. Any help would be great!

75. ## CHEMISTRY

What is the mass in grams of one Mole of water?

76. ## Puncuation

Am I supposed to write the definition, pronunciation, and part of speech of the word "bliss" like this? Bliss /blis/ (noun): perfect happiness; great joy.

77. ## algebra

Michelle has 45 books. Olivia has b fewer books. Which expression represents the total number of books Olivia has?

78. ## Math

A 12-foot ladder is leaning against a wall. The base of the ladder is 4 feet from the wall. How tall is the wall?

You borrow \$2,000 at a rate of 3% for a period of 4 years. How much will you re-pay at the end of 4 years? This is a 7th grade math question and I feel like it's a trick question. I am thinking that I should use the simple interest formula, but I know that

80. ## Finance

Handy Enterprises has gathered projected cash flows for two projects. Year Project I Project J 0 –\$215,000 –\$215,000 1 104,000 75,000 2 93,000 86,000 3 79,000 96,000 4 72,000 105,000 Requirement 1: At what interest rate would the company be indifferent

what is the mass in grams of one molecule of water... and is this one different from what is the mass in grans of one mole of water?

82. ## Math

two angles are vertical. if angle A is 37 degrees, what is the measure of angle B?

Which one of the following ia a defensive strategy.

84. ## emily

some skin creams claim that they are "pH balanced" and yet do not have a pH of 7. what do they mean when they say pH balanced?

85. ## math

sub 780 for x -2,5x^2 +2825x -115,812.5

86. ## Chem

In the lab a 3.3mol per liter solution was prepared by adding H2O to 140mL of a 4.3mol Per Liter solution of HCL. How much water was added?

87. ## Applied Math (Biological application)

The deformation y(t) of heart muscle from its rest position after t seconds can be modelled as a spring-mass system, described by the differential equation: my" + vy' + ky = F(t) where m, v, and k are positive constants denoting the mass of the myocardial

88. ## A Peculiar Question

If I have been given a B+ for two essays, it is considered a terrible grade? Will it affect my report card?

89. ## Finance

Handy Enterprises has gathered projected cash flows for two projects. Year Project I Project J 0 –\$215,000 –\$215,000 1 104,000 75,000 2 93,000 86,000 3 79,000 96,000 4 72,000 105,000 Requirement 1: At what interest rate would the company be indifferent

90. ## Rate Law - Chemistry

I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

91. ## chemistry

I feel like this question is pretty easy, but I can't seem to figure out how to go about solving it. It's like the solution is on the tip of my tongue: Nitromethane (CH3NO2) burns in air to produce significan amounts of heat. 2 CH3NO2(l) + 3/2 O2(g) -> 2

92. ## algebra

Write the numeral as a Roman numeral. 503,303 A. MMCCCIII B. MMMCCCIII C. MMCCCXIII D. MMCCIII

93. ## Math

One of my questions say 16, base 4. It says to write it as an exponent but which one is which?

94. ## MATH

1/8 OF TONY'S BOOKS ARE MYSTERY BOOKS

95. ## chemistry

How many moles of sodium chloride can be produced if 29g of Magnesium Chloride are reacted in the reaction 2NaNO3 + MgCl> 2NaCl+Mg (NO3)2?

96. ## statistics

Find z such that 7.1% of the standard normal curve lies to the left of z ?

what type of bonding is phosphoric acid?

98. ## Chem

When 100mL of 0.60mol per liter K3BO3 is added to 200 mL of 0.40 mol per liter Ca3(BO3)2 Find a)moles of K3BO b) moles of Ca(BO3)2 c)final concentration of K+ d)final concentration of Ca+2 e) final concentration of BO3 negative 3

99. ## phsyics

the coefficient of volume expansion for iron is 3.6 X 10^-5/C degrees. If a 17 m long rod of iron is cooled from 100 degrees C to 5 degrees C, What is the new length?

100. ## science

A meteorite weighs 300 Newtons on the moon. the moons force of gravity is 1/6 that of earth. what is the meeorites weight on earth?

how can an organisations strategic and business plan influence staff recruitment, selection and induction?

102. ## math algebra

a square parking lot has a surface area of (w^4-2w^2x+x^2) square feet. Factor this trinomial to find the length of one side in feet.

103. ## Algebra

Find the equation of the parabola with its vertex at (h,k). Vertex: (-2.1) Focus: (-5,1) I know I put it into (y-k)^2=4(p)(x-h) so (y-1)^2=4(p)(x+2). How do I find the value of p?

104. ## Algebra

Find the equation of the parabola with its vertex at (h,k). Vertex: (-2.1) Focus: (-5,1) I know I put it into (y-k)^2=4(p)(x-h) so (y-1)^2=4(p)(x+2). How do I find the value of p?

105. ## statistics

If boys and girls are equally likely and groups 400 births are randomly selected find the standard deviation

106. ## Chemistry

In a heating and cooling curve, I understand that the flat part means that the bonds are either forming or breaking, depending on if the input of energy is increasing or decreasing, but what is happening to the bonds in the slanted parts? Thanks!

107. ## English

1. It's very noisy here. I can't stand it any more. (What does "it" refer to in the first sentence? What does "it" refer to in the second sentence? Are both the same? Is 'it' an impersonal pronoun or just a pronoun which refers to something that is

find the lateral area of a cone with a radius of 7ft. and slant height of 13ft, use 3.14 for pi and round the nearest tenth. . . . . A.439.6 ft^2 . . . . . B.324.5 ft^2 . . . . . . C.571.5 ft^2 . . . . . . D.258.7 ft^2(I PICKED THIS ONE)

109. ## Statistics

A random sample of 150 towns in a western state had a mean annual precipitation of 2.86 inches. Assume that the population standard deviation is known to be 0.78 inches. Compute the 95% confidence interval for μ.

110. ## english

how would you start off an essay that is about the lack of privacy you have? (has to be in first person)

111. ## physics

The drawing shows a skateboarder moving at 6.93 m/s along a horizontal section of a track that is slanted upward by 45.6 ° above the horizontal at its end, which is 0.654 m above the ground. When she leaves the track, she follows the characteristic path

112. ## Chem

A 7.00 mL sample of blood serum has a pH of 7.38 a. What is the concentration of H3O+? b. What is the concentration of OH-? c. How many moles of H3O+ are present? I have no clue what to do and I don't have a calculator with me someone help me I would

113. ## math

What numbers value is 100, 000 less than 1, 547, 298?

114. ## math --- check my work!

1.Find the surface area for a sphere with a radius of 10 feet. Round to nearest whole number. 1,256 ft2*** 4,189 ft2 1,089 ft2 1,568 ft2 2.Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. 1,257 ft3 4,187 ft3*** 1,089

I really need help learning how to understand & fill out an income statement packet, ASAP!

116. ## Math

A man completed a trip of 136 km in 8 hrs. Some part of the trip was covered at 15 km/hr. What is the part of the trip covered at 18 km/hr?

117. ## math

bill and jane are 1080 miles apart. They start driving towards each other at exactly the same time. Bill travels at 70 mph. Jane travels at 65 mph. How long must they drive before they meet?

118. ## physics

A pitcher throws a 0.198-kg baseball, and it approaches the bat at a speed of 57.5 m/s. The bat does 85.1 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 32.7 m above the

119. ## Criminal investigation

If you had information about a crime, would you be an official informant for the authorities? What would your concerns be? I don't think you would be a official informant, but im not sure what by concerns would be. Can somebody help?

120. ## MATH

sub 789 for x -2.5x^2 +2825x-115,812.5

121. ## math

A lounge suite is on sale for 15% off its original price. On sale the price of the suite is R8000. How to calculate the original price?

122. ## math

in acertain ratio of boys and girls is 4:5. if the class has 54 students, how many are girls?

123. ## statistic****help*****

Show all your work. Indicate clearly the methods you use because you will be graded on the correctness of your methods as well as on the accuracy of your results and explanation. A simple random sample of adults living in a suburb of a large city was

124. ## Quick Science Question

I have a question. Is a Atwood Machine a suspended pulley? I have question asking me what the machine is, and there are two answers with the word pulley in them. I am really confused between the two. I have tried looking it up, and I get confused again

125. ## understanding and managing money

guarantee replacement cost in a homeowner's insurance policy means that the insurance company

126. ## Physical Science

The current in a toaster oven is 15 A when plugged into an electrical outlet that is 110 V. How much electric power is used by the toaster oven? Formula: P = IV

127. ## Chemistry

I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

128. ## Physics

A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision?

129. ## Phy

A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision? Answer a. 0.394 kg·m/s

130. ## math

If a school canteen makes 72 sandwiches and sells 5/6 of them how many are sold

131. ## physics

Two cars start off a race with initial velocities u0 and v0, and travel in a straight line with uniform acceleration á and â. If the race ends in a dead beat, prove that the length s of the race is: s=(2(u_0-v_0)(u_0 â-v_0 á))/(â-á)^2

132. ## Math

What is the answer to 4+3p=19 ?

133. ## Biology

A poultry farmer hopes to profit from the current craze for keeping egg laying chickens as pets and wishes to increase his stock of interesting and unusual breeds. (a) The farmer crossed a pure-breeding white chicken with a pure-breeding black chicken and

134. ## Math

How do you solve 6k-8=k+2???

135. ## Math - PreCalc (12th Grade)

If the length of the minor axis of an ellipse is 6 units and the length of the major axis is 10 units, how far from the center are the foci located? A) 4 units B) 2 units C) √4 units D) √8 units E) 5 units

136. ## maths

A dress cost \$1600 after 20% discount was given.What was the price of the dress before the discount.

137. ## Economics

Which of the following is not a factor of production? A. Capital B. Goods and Services C. Labor D. Land

138. ## Chemistry

Calculate the number of moles of ag in 5ml of .004m agno3 and the number of moles of cr04 in 5ml of .0024m k2cro4

139. ## Science question, only 1

What would be the consequence of an ecosystem that had no nitrogen-fixing bacteria? Nitrogen from decomposing animals would never be returned to the soil. Decomposers would not be able to break down the nitrogen present in plants they feed on. Plants would

140. ## Chemistry

Calculate the change in mass of the In electrode after the cell supplies 100 mA of current for 10 minutes. The balanced redox reaction is 2In+Cl2=2In+ + 2Cl-. I understand the idea behind the question, I just don't know if I should use 1 mol In per 1 mol

141. ## math

Why is comparing fraction s hard?

142. ## Health

There are ________ of muscles that are responsible for chewing movements or mastication.

143. ## math

What is 11.11

144. ## Chemistry

I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

145. ## math

Evaluate cot -220o Round your answer to the nearest hundredth. A. -1.31 B. 1.56 C. -1.19 D. -0.84

146. ## grammar

The patient’s first visit, to the office, was for lower back pain.

147. ## SCIENCE 1 QUESTION PLS HELP!!!!!

3. Which of the following describes the relationship between friction and inertia? (1 point) When there is more friction, there is less inertia. When there is less friction, there is more inertia. When there is more friction, there is more inertia. When

148. ## physics

A cylinder floats with its volume 3 cubic metre inside water. What is its total volume if its density 100 kg per cubic metre? Density of water is 1000 kg per cubic metre

149. ## math trig

a triangle abc has a mearsure of an adjacent 15 and 25 degree solve for the triangle

150. ## Chemistry [back-titration] - please check my sol'n

A 7.00 gram sample containing the mineral tellurite was dissolved then treated with 70.0 mL of 0.03114 M K2CrO7. 3 TeO2 + Cr2O7 ^2- + 8 H+ -> 3 H2TeO4 + 2 Cr3+ + H2O When reaction is complete, the excess Cr2O7 2- required a 14.05 mL back titration with

151. ## algebra

jim is 13 years older than tom the sum of their age is 75. how old is tom and how old is jim

152. ## chemistry

If a tank contains 55.2 g of butane, what volume, in liters, of oxygen is needed to burn all the butane at 0.850 atm and 25 degrees Celsius? Need to show work too.

153. ## English??

I am writing a recommendation paper on the type of medication to treat ADD/ADHD.. does anyone have an interesting idea for a title?? maybe something joke-ish? i cant think of anything and my teacher said it has to be something to 'draw the audience in'

154. ## Grammar

Is this sentence grammaratically correct? "Although I already wished you one at Seminary this morning, I still hope you have a Happy Birthday."

155. ## math trig

verify the identities COSX OVER 1PLUS SINX PLUS 1PLUS SINX OVER COSX IS EQUAL TO 2SEC.

156. ## math trig

a triangle has a measured of hypoteneuos 15 and an adjacent of 10 solve for the triangle.

157. ## Math - PreCalc (12th Grade)

What is the right-hand limit of this function at x=2? g(x)=x^2−3/x−3 A) -1 B) 0 C) 1 D) 2 E) 3

158. ## geometry

A person riding the original Ferris Wheel is traveling at a speed of 0.495 mph. If one revolution takes 9 minutes, what is the diameter of the Ferris Wheel? Show your work.

159. ## Math - PreCalc (12th Grade)

What is the first natural number that causes the statement:(2+3)^n

160. ## Math - PreCalc (12th Grade)

What does this function show at x = 5? f(x)=x^2−25/x−5 A) removable discontinuity B) jump discontinuity C) infinite discontinuity D) continuity E) none of the above

161. ## Math - PreCalc (12th Grade)

What is the first natural number that causes the statement 1 + 3 + 5 +... + (2n − 1)

162. ## CHEMISTRY

I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

163. ## MATH

sub 789 for x -2.5x^2 +2825x-115,812.5 having troubble undeerstanding the process . could someone show me step by step..

164. ## Science

How much copper 2 sulfate do you need to react with 0.5grams of steel wool?

165. ## math

Find the solution to the system of equations given below using elimination by addition. 5x + 20y = 40 x + 3y = 6

166. ## algebra: functions

Which expression represents the quotient of f and 52?

167. ## uta

the acidity constant of acetic acid is 1.8 x 10^-5. Calculate the % error of the measured Ka value of 1.82 x 10^-5

168. ## Finance

A company has just completed the third year of a five-year MACRS recovery period for a piece of equipment it originally purchased for \$300,000. a. What is the book value of the equipment? b. If the company sells the equipment today for \$180,000, and its

169. ## Maths

A string of decorative lights is 28 ft long the first light on the string is 16 inches from the plug if the lights on the string are spaced 4 inches apart how many lights are there on the string

170. ## Physics

I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the

171. ## physics

what is the magnetic flux of a magnetic field of 3.5 x 10 T lassing a given circular surface with radius 30 cm

172. ## Math

how do you use the quadratic formula on a TI-83 calculator? I'm in algebra 1!

173. ## mathematics

If paul pays the newspaper company 70% of what he collects, how much would he keep for himself in a month when he collected \$450.00?

174. ## AP Chemistry

A solution is 1.0M in AgNO3 and Fe(NO3)2.in the electrolysis of this solution using inert electrodes, the voltage is gradually increased. What is the order in which the substances in the solution would plate our or react at the cathode ? Assume that the

175. ## Chem.

N2+3H2 2NH3, The equilibrium constant for the chemical equation is Kp = 0.143 at 225 °C. Calculate the value of the Kc for the reaction at 225 °C.

176. ## I NEED HELP PLEASE

A trough is 8 meters long, 3 meters wide, and 5 meters deep. The vertical cross-section of the trough parallel to an end is shaped like an isoceles triangle (with height 5 meters, and base, on top, of length 3 meters). The trough is full of water (density

177. ## Geometry

I am pulling my hair out trying to figure out glide reflections. P-->P'(-2,-6) for the glide reflection where the translation is (x,y)-->(x,y-1) and the line of reflection is x=1?? A)(4,-5) B)(-2,-7) C)(-2,-5) D)(4,-6) Help please, I am a mom pulling her

178. ## math

The first term of an AP is 8. The ratio of d 11th term to the 7th term is 5:8 calculate the common difference

179. ## statistics

99% of men scored between -52.68 ,64.64 where did 95% of the values for weight relative to the ideal lie?

180. ## math

there are 18 boys in a class. there are W less boys than girls. How many students are in the class?

181. ## Algebra

If a salesman earned 6% commissions on sales, and in one week he earned \$300 in commissions, how much merchandise did he sell that week?

182. ## math

if a took a loan out for \$12000 for one year at 10% simple discount what would be my interest

183. ## math

If a took a loan of \$12000 for one year at 9.5% simple interest what would be my interest

A comforter sells for \$40 dollars and is marked up 40% of the selling price. What is the cost of the comforter?

185. ## Math

3 pieces of ribbon, each 85 cm long, are cut from a length of ribbon 3 m long. What is the length of the remaining piece of ribbon?

186. ## Bus

Guaranteed replacement cost in a homeowner’s insurance policy means that the insurance company A. guarantees they’ll replace the lost items for you. B. guarantees they’ll pay the current value of items lost. C. will pay you what it costs to replace

187. ## physics question for damon (a clarification)

Hi Damon! You helped me out in this question yesterday (jiskha. com /display.cgi?id = 1395185605) and I was wondering why you added gravity when calculating the friction. Thanks for your help!

188. ## Science

The total amount of ice in the Greenland ice sheet is estimated to be 2.85 million cubic km. Assume the Earth's surface is 70% covered by ocean, and that the Earth's radius is 6300 km. How many meters would sea level rise if the entire Greenland ice sheet

189. ## Science

CFC-11 and CFC-12 are very potent greenhouse gases. Suppose the emission of 1 Tg of CFC-11 causes a 1.0 W m-2 instantaneous perturbation in the radiation budget. The emission of the 1 Tg of CFC-12 causes a 1.5 W m-2 radiative forcing. The 100 year global

190. ## math

B(0,5) F(0,3) G(30,3) C(30,5) Find the area, Area BFGC =

191. ## Physics.

Calculate the tension in a horizontal string that whirls a 1.9-kg toy in a circle of radius 2.3m when it moves at 2.8m/s on an icy surface. Express your answer to two significant figures and include the appropriate units

192. ## Math

A recipe for snack mix has a ratio of 2 cups nuts, 4 cups pretzels, and 3 cups of raisins. How many cups of nuts are there for each cup of raisins?

193. ## Physics

Bats chirp at a high frequency which humans cannot hear. They use the echoes to detect small objects, such as insects, as small as one wavelength. If a bat were to emit a chirp at a frequency of 60.0 kHz and the speed of sound waves in the air are 340 m.s,

Footprints and trails are examples of trace fossils? TRUE*** FALSE

195. ## Language Arts

In the sentence, "If you keep talking to me, I can't finish." would "to me" be a prepositional phrase? Thanks...

196. ## Social Studies

What are some travel attractions in El Salvador? What are some famous celebrities from El Salvador?

Is a new hair shampoo product actually effective? Ask participants to grade themselves on scale of 1-10 how attractive their hair is both before and after using a shampoo product after 2 weeks Results Subject Initial Rating (A) Rating After 2 Weeks (B) 1 1

198. ## Finance

Handy Enterprises has gathered projected cash flows for two projects. Year Project I Project J 0 –\$215,000 –\$215,000 1 104,000 75,000 2 93,000 86,000 3 79,000 96,000 4 72,000 105,000 Requirement 1: At what interest rate would the company be indifferent

199. ## Math

Any began a running program she ran less than 5/6 of a mile what part if a mile could any have run