# Questions Asked onNovember 8, 2015

1. ## math

In a family with 4 children what is the probability of having 1 boy and then 3 girls, in that order? (Exclude multiple births and assume all outcomes are equally likely). In a family with 4 children, what is the probability of having 1 boy and 3 girls, in

2. ## math

A hacker is trying to guess someone's password. The hacker knows (somehow) that the password is 14 characters long, and that each character is either a lowercase letter, (a, b, c, etc), an uppercase letter (A, B, C, etc) or a numerical digit (0, 1, 2, 3,

3. ## math

The letters in the word MATHEMATICS are arranged randomly. What is the probability that the first letter is E? What is the probability that the first letter is M?

4. ## math

Every cereal box has a gift inside, but you cannot tell from the outside what the gift is. The store manager assures you that 16 of the 58 boxes on the shelf have the secret decoder ring. The other 42 boxes on the shelf have a different gift inside. If you

5. ## calculus

assume x and y are functions of t. Evaluate dy/dt for 2xy--4x/3y^3=48, with conditions dx/dt=-6,x=3, y=-2

6. ## math

You own 19 CDs. You want to randomly arrange 9 of them in a CD rack. What is the probability that the rack ends up in alphabetical order? The probability that the CDs are in alphabetical order is ?

7. ## math

A group of people were asked if they had run a red light in the last year. 325 responded "yes", and 294 responded "no". Find the probability that if a person is chosen at random, they have run a red light in the last year.

8. ## prealgebra

A barrel shaped like a cylinder is laid on its side and rolled up a ramp. The barrel has a circular base that is 0.9m in diameter. If the barrel turns 37 times in being rolled up the ramp, how long is the ramp? Use the value 3.14 for π . Round your answer

9. ## math

A bag contains 5 red marbles, 6 white marbles, and 8 blue marbles. You draw 5 marbles out at random, without replacement. What is the probability that all the marbles are red? The probability that all the marbles are red is? What is the probability that

10. ## Chemistry

How many moles of phosphorus atoms are in 100 grams of P4S10?

11. ## math

You’re piloting an airplane. To prepare for landing, you change the plane’s altitude from a feet to c feet. What expression always represents the distance between the two altitudes?

12. ## math

The 4th term of an Ap is 6. if the sum of the 8th and 9th terms is -72,find the common difference

13. ## Math Word Problem

A teacher from Anderson Middle School printed k nametags in preparation for the science fair. Half of the nametags were given out to students and 100 nametags were given out to parents. Three-fifths of the remaining nametags were given out to teachers and

14. ## math

if the simple interest on a certain sum for 15 months at 7.5% per annum exceeds the simple interest on the same sum for 8 months at 12.5% per annum by Rs 32.5, then the sum is

15. ## Mechanical behavior

An atomic force microscope cantilever, of rectangular cross section, has a length, l, of 200μm, a width, b, of 20μm and a depth, h, of 1μm. It is made of silicon nitride, which has a Young's modulus, E, of 300GPa. What is the maximum force that can be

16. ## chem

Calculate the potential for: Br2(l) + 2Cl-(aq) → Cl2(g) + 2Br-(aq) Use Eº = -.300 V when the concentrations of the soluble species are as follows: [Cl-] = 0.39 M, [Br-] = 9.0x10-3 M, PCl2 = 8.5x10-2 atm

17. ## Math

Inner length = 100 m, inner breadth =50 m, width of the border = 2 m

18. ## Math

the function 160x/100-x,models the cost,f(x), in millions of dollars,to remove x% of a river pollutants,if the government commits 240 million for this project, what percentage of pollutants can be removed?

19. ## Chemistry

Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to

20. ## Chemistry

How would you balance this equation?? Ba(NO3)2 + NH2SO3H + H2O -> Ba(NH2SO3)2 + HNO3 Would you have to make the H2O 0, ultimately removing H2O from the equation (is that even allowed?), or is there another way of balancing it??

21. ## chemistry

Calculate ΔGo (in J) for 2 moles of electron(s) in each half-reaction and a standard potential of 0.44 V

22. ## Organic Chemistry

How am I supposed to do these questions? I'm completely lost. A 0.120 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 130.0 g/mol. (b) What is the

This part I have: 1)Derive an equation for the bending deflection δ of the bat at B, where the ball hits the bat, in terms of the applied load, P, the span, lAB, the Young's modulus of ash, E and the moment of inertia of the cross section, I. Answer:

24. ## Algebra

How do I solve: Translate "y more than 4 is -36". Then solve the problem. Hope someone could help me out with this annoying question!

25. ## Algebra 2

Jack is selling wristbands and headbands to earn money for camp. He earns \$2 for each wristband and \$3 for each headband. He wants to earn at least \$50. He needs to sell at least 5 wristbands. Which system of inequalities is shown in the graph of the

26. ## math

a liquid storage container on a truck is in the shape of a cylinder with hemispheres on each end. the cylinder and hemispheres have the same radius. the total length of the container is 140 feet. I have got the funcion for the volume is y=-2pi/3 x^3+ 140pi

27. ## Chemistry

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

28. ## Pre-Calculus

Two lookout towers are situated on mountain tops A and B, 4 mi from each other. A helicopter firefighting team is located in a valley at point C, 3 mi from A and 2 mi from B. Using the line between A and B as a reference, a lookout spots a fire at an angle

29. ## literature

A problem that may occur in nonfiction text is: A. the inclusion of anthropomorphism. B. the exclusion of teleological explanations. C. the exclusion of anthropomorphism and teleological explanations. D. the inclusion of anthropomorphism and teleological

30. ## chemistry

Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What

31. ## Algebra

One type of anyifreeze is 40% glycol, and another type of antifreeze is 60% glycol. How much of each kind should be used to make 100 gallons of antifreeze that is 48% glycol? How do i show my work? Thanks

32. ## Chemistry

Ammonia can be produced in a two-step process. First, nitrogen reacts with red-hot magnesium to form magnesium nitride. Then magnesium nitride reacts with water to form magnesium hydroxide and ammonia. How many grams of magnesium would we have to start

description of the population statistics LOCATION in South Carolina already found the age and race just having trouble with the location statistics please help!!!!!!

34. ## Math

which of the following represents the range of the function f(x)=-4x+1 for the domain {-5,-1,0,2,10} A{-39,-7,1,5,21} B{-41,-9,1,5,21} C{-19,-3,-1,5,21}***** D{-41,-9,-3,-19}

35. ## math

A hacker is trying to guess someone's password. The hacker knows (somehow) that the password is 14 characters long, and that each character is either a lowercase letter, (a, b, c, etc), an uppercase letter (A, B, C, etc) or a numerical digit (0, 1, 2, 3,

36. ## Math

Two ships are sailing in the sea on the two sides of a lighthouse. The angle of elevation of the top of the lighthouse is observed from the ships are 30 degrees and 45 degrees respectively. If the lighthouse is 100m high, the distance btn the ship is?

37. ## Quick English check

Select the term that is best represented by each statement below. (The words are: admonish, advocate, bias, exposulate, influential, interaction, linguistic, susceptible, temperament, and wary.) 1. "I am a decided preference in favor of a particular side."

38. ## Chemistry

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

39. ## Chemistry

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot.

40. ## Math

A pack of cinnamon-scented pencils sells for \$6.00. What is the sales tax rate if the total cost of the pencils is \$6.48? The sales tax rate is %.

41. ## Organic Chemistry

What observed rotation is expected when a 1.44 M solution of (R)-2-butanol is mixed with an equal volume of a 0.720 M solution of racemic 2-butanol, and the resulting solution is analyzed in a sample container that is 1 dm long? The specific rotation of

42. ## history

were Helen Keller and John Reed more or less patriotic than United States soldiers who fought in the military during the war? Explain.

43. ## math

If you randomly select a card from a well-shuffled standard deck of 52 cards, what is the probability that the card you select is a diamond or club? (Your answer must be in the form of a reduced fraction.)

44. ## Social Studies

what was the purpose of the constitutional convention held in philadelphia in 1787? A.To sign the treaty of paris B.To select the nation's new president. C. to revise the Articles of Confederation D.to draft a declaration of independence My answer is c

45. ## Chemistry

How many atoms of carbon are present in 49 g of a compound that is 54 . 1% carbon, by weight?

46. ## Social studies

explain the reasons for the proclamation of 1763. The proclamation of 1763 was created on October 7, 1763 by king George the III. The proclamation of 1763 was an attempt to avoid the colonial balance with the Native Americans by creating Western

47. ## Math

At a halftime show a matching band marched in formation. The lead drummer started at a point with coordinates (-2,-5) and moved 3 steps up and 1 step right. A. Write a rule to describe the translation B. What were the coordinates of the drummers final

48. ## maths

A motorcycle was purchased for Rs. 48000. If its value depreciates every year by 10%, calculate the total depreciation in its value at the end of 3 years

49. ## phy

A certain CD has a playing time of 72 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular

50. ## Chemistry

In a copper cycle lab if I add HCl to CuO to produce CuCl, what would a word equation for that reaction be? Is it a chemical reaction? and also for that step what complexes are observed? what does that mean?

51. ## probability

Adefective coin minting machineproducescoinswhoseprobability ofheadsisarandomvariable P with PDF 1+sin(2πp), if p ∈ [0,1],fP (p)= 0, otherwise. Inessence,aspecificcoinproducedby thismachinewillhavea fixedprobability P = p of giving heads, but you do not

52. ## Chemistry

1. is it easy to distinguish between between the different oxidation states of copper? why? 2. You synthesized copper (I) chloride and copper (I) oxide. How do they differ from their copper (II) analogs? comment on the stability of these moist solids in

53. ## PHYSICSSS

The average velocity a golf ball hit with an iron is about 66.7 m/s. Calculate the maximum height and displacement of the golf ball if it is hit with a 45 degree 9 iron

54. ## math

adult tickets for a play cost \$5.50 and a child ticket cost \$3.50. They sold 550 tickets and collected \$2139.00. How many adult tickets sold

55. ## liberty college

I am in grade 12 and I have taken History, matches literacy, English language/ literacy,life science, business studies and economics, what course will these subjects allow me take in university? Regards Rita.

56. ## Physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 11.5 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 204 kg. (a) Determine the tension in the cable

57. ## chemistry

Suppose that 2.69 mol of hydrogen gas occupies a 64.6 L steel tank. At what temperature in °C will the pressure in the tank be 1,383 torr?

58. ## early childhood

Which one of the following statements about literary elements is TRUE? A. The author should end the book with a closing comment to ensure that the story’s moral is conveyed. B. Setting is a backdrop that can be changed without affecting the plot. C. Good

59. ## Chemistry

In a copper cycle lab if I add HCl to CuO to produce CuCl, what would a word equation for that reaction be? Is it a chemical reaction? and also for that step what complexes are observed? what does that mean?

60. ## Chemistry

is it easy to distinguish between between the different oxidation states of copper? why? -I answered yes because copper (I) is not as stable as copper (II), and there is a noticeable colour difference You synthesized copper (I) chloride and copper (I)

A rental car agency charges \$240.00 per week plus \$0.25 per mile to rent a car. How many miles can you travel in one week for \$435.00?

62. ## Math

Using the formula lim h approaches 0 f(x+h)-f(x)/h, find the derivative of f(x)=2x^2+4x

63. ## Chemistry

For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the

64. ## chemistry

the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My

65. ## physics

A force is applied to a 2.9 kg mass and produces 2.7 m/s 2 acceleration. What acceleration would be produced by the same force applied to a 6.2 kg mass? Answer in units of m/s 2 .

66. ## TBLS EDUCATION ACTIVITES

Provide a brief description of each of the following parts of life direction vision, setting goals, plan of action and discuss their importance. I need help please.

67. ## Physics

A stone weighs 34.0 N. What force must be applied to make it accelerate upward at 4.00 m/s2?

68. ## Chemistry

the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My

69. ## Chemistry

Nitrogen can also be produced from sodium metal and potassium nitrate by the reaction: Na(s) +KNO3 (s) --> K2O(s) +Na2O(s) + N2(g) If we generate oxygen by the thermal decomposition of potassium chlorate: 2KClO3(s) --> 2KCl(s) +3O2(g) How many grams of

70. ## Chemistry

The thermal decomposition of carbonates leads to the loss of CO2. The decomposition of an unknown carbonate leads to a 35.1% weight loss. The unknown was which of the following compounds. A. Li2CO3 B. MgCO3 C. CaCO3 D. ZnCO3 E. BaCO3

71. ## physics

Three people attempt to hold a heavy sign in place. Abby pulls directly upwards (in the middle) with 140 N of force. Joe is ob Abby's left and pulls at a 30.0° to Abby's rope with a force of 180 N. Henry is on Abby's right and pulls at a 30.0° to Abby's

72. ## Calculus

Find the volume of the solid obtained by rotating the region under the graph of f(x)= 9-x^2 for 0

73. ## math

one hour is what percent of one week?

74. ## technical college

inscribe a circle into the given triangle in which r=75degree, q=45 degree and qr=8.5

75. ## Chemistry

How do I calculate the percent yeild of copper give the mass and concentration of Cu(NO3)2 and the final mass of copper

76. ## Chemistry (Ksp and Solubility)

Kindly answer my query as early as possible.Please solve the complete question A solution contains 0.01M Ag+ and 0.001M Ba+2 . ksp of Ag2CrO4 = 2.4*10e-12 ksp of BaCrO4 = 1.17*10e-10 A solution of K2CrO4 is added to this solution. Which will precipitate

77. ## geography

if you start at 10 degrees south latitude by 140 degrees west longitude and sail to 20 degrees north latitude by 105 degrees west longitude which general direction are you traveling?

78. ## 8th grade pre algebra line segments

It's asking me to use a grid and lengths of line segments to give a geometric argument but I'm not sure what that means or looks like.

79. ## Is this cheating?

Hi so Friday, my friend wasn't quite understanding the assignment and nobody was allowed to talk in the classroom. So, she just asked to see my notebook to look if she was doing it right. The teacher walks over, automatically assumes she was

80. ## Calculus

Find the area of the region between the graphs of f(x)=3x+8 and g(x)=x^2 +2x+2 over [0,2]. My answer: 34/3

81. ## Chemistry (Check)

Ammonia can be produced in a two-step process. First, nitrogen reacts with red-hot magnesium to form magnesium nitride. Then magnesium nitride reacts with water to form magnesium hydroxide and ammonia. A. Write each balanced chemical reaction. B. How many

82. ## Chemistry (Check)

Ammonia can be produced in a two-step process. First, nitrogen reacts with red-hot magnesium to form magnesium nitride. Then magnesium nitride reacts with water to form magnesium hydroxide and ammonia. A. Write each balanced chemical reaction. B. How many

83. ## Math

How many whole numbers between 100 and 1000 have 1 as the tens digit? Options are: 89 90 99 100

84. ## physics

A spring and mass system are oscillating with an amplitude of 5.4 cm. The spring constant is 166 N/m and the mass is 540 g. Find the mechanical energy of the system

85. ## Chemistry

For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the

86. ## health

i need to find a way to creatviley describe the path of the female reproductive system

87. ## physics

A 40 N force is applied at an angle of 30o to the horizontal to pull a 6 kg box along the floor. If the coefficient of friction between the box and floor is 0.3.The box initially at rest moves a horizontal distance of 5m. What is the speed of the box when

I really need someone to answer check my answers. If my answers are wrong please tell me what I did wrong. Cross out any prepositional phrases. Underline the subject once and the verb/verb phrase twice. 1.) After class give the teacher your paper.

89. ## Music

What are the Rhythmic and Melodic features of Dikrayati

90. ## physics

The bird perched on the swing shown below has a mass of 41.6 g, and the base of the swing, y = 7.88 cm below the hook, has a mass of 147 g. The swing and bird are originally at rest, and then the bird takes off horizontally at 1.94 m/s. How high will the

91. ## Statistics and probability

A psychologist tested the IQ in a sample of 36 children. Their mean IQ was 104. What is the probability of getting an IQ score of 104 or higher? The mean is 100, and the standard deviation is 15

92. ## chemistry

Assume that 268mL of 5.00M NaOH are diluted to a final volume of 574mL with water. What is the final molarity of NaOH (FM=40.0).

93. ## Physics

A stone weighs 34.0 N. What force must be applied to make it accelerate upward at 4.00 m/s2?

94. ## Physics

Two buckets of sand hang from opposite ends of a rope that passes over an ideal pulley. One bucket is full and weighs 110 N ; the other bucket is only partly filled and weighs 65 N . You release the lighter bucket and the heavier one descends. What is the

95. ## Dynamics

A uniform rod m1 and having a length L is hanging vertically downward and pin supported at the center of mass of a roller (disc) which rides on a horizontal track. Assuming that the system was initially at rest find the initial acceleration of the roller

96. ## chem

A flexible container at an initial volume of 8.15 L contains 2.51 mol of gas. More gas is then added to the container until it reaches a final volume of 12.1 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles

97. ## Simple algebra/Physics problem

A proton, moving with a velocity of vi, collides elastically with another proton that is initially at rest. Assuming that after the collision the speed of the initially moving proton is 2.90 times the speed of the proton initially at rest, find the

98. ## Calculus

Find the lim x→∞ of (ln(x))^2)/x using L'hospital's rule. I got - infinity when I did this, but I think I was looking at the numerator wrong when I took the derivative.

99. ## Math

This is the second part of a two part question for an online class. It gave me the degree and the zeros and I had to give the factored form. I got that part right, but I need to know how to get the expanded form from the factored form. I have several more

100. ## math

Every cereal box has a gift inside, but you cannot tell from the outside what the gift is. The store manager assures you that 16 of the 58 boxes on the shelf have the secret decoder ring. The other 42 boxes on the shelf have a different gift inside. If you

101. ## Mthombo

The perimeter of a quadrilateral pqrs is 30mm and its area is 50mm squered ,find the peremiter and area of quadrilateral pqrs if scale factor is 1/5

102. ## Organic Chemistry 2

Compare the IR spectrum of benzoin ) with the IR spectrum of benzil . Explain how the changes in the important peaks are related to the differences between the two structures.

103. ## Organic Chemistry 2

What is the purpose of adding NaOH ot the reaction? This is the from our Benzil Lab.

104. ## Organic Chemistry 2

What is the impurity that must be removed from the benzaldehyde reagent before it can be used in this experiment? this is from are Benzil lab in this lab, benzoin condensation of benzaldehyde will be carried out with a biological coenzyme, thiamine

105. ## state poly

what is algorithm

106. ## Accounting

When Resisto Systems, Inc., was formed, the company was authorized to issue 5,000 shares of \$100 par value, 8 percent cumulative preferred stock, and 100,000 shares of \$2 stated value common stock. Half of the preferred stock was issued at a price of \$104

107. ## Math

What is the ratio of boys to girls 2:3 if there are 160 boys how mayn girls are there?

108. ## Phycis

What is the formular of (forced,Areaand pressure)

109. ## Science

Can someone please help me with this problem? A 200-1b block rests on a horizontal plane. Find the magnitude of the force P required to give the block an acceleration of 10 ft/s2 to the right. The coefficient of friction between the block and the plane is

110. ## chemistryyy

how do i get from Molarity to % g / mL ??? I have a concentration of .2379 M.

111. ## Nursing

who and what influences the content of nursing courses?

112. ## Nursing

Who is involved in the development and design of nursing education?

113. ## Statistics

Team X has an average (mean) height of 70 inches and a standard deviation of 3 inches and Team Y has an average height of 67 inches with a standard deviation of 9 inches. Compare the two teams using this information and which team will have the tallest and

114. ## Math

Determine if the graphs of the equations are parallel, perpendicular, or neither: 4x – 3y = 6 8x – 6y = 9

1.5

116. ## Chemistry

You synthesized copper (I) chloride and copper (I) oxide. How do they differ from their copper (II) analogs? comment on the stability of these moist solids in air. If unstable, what is the likely product of decomposition? -I'm not really sure where to go

117. ## Chemistry

Arrange the following in order of increasing mass: 1. one F atom 2. 1x10^-20 mol of F 3. 1x10^-20g of F 4. one F2 molecule A. 1

118. ## chemistry

How much pure calcium carbonate (100.09 g/mol) is required to produce 40.0 mL carbon dioxide gas according to the reaction used in this experiment? Your unknown will contain between 25-100% calcium carbonate. Answer to 3 significant figures. Do not include

119. ## MCA

arrange the decimals 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8 and 5.9 in the square grid with 3 colums and 3 rows pattern to make the sum of the numbers in each row, column, and diagonal equal.

120. ## Math

If it takes a old and hot tap 6 mins to fill a bath and on their own it takes the hot tap 100 secs more than the cold tap to fill bath. How long will it take the cold tap on its own to ill the bath

121. ## Math

Using the formula lim h approaches 0 f(x+h)-f(x)/h, find the derivative of f(x)=2x^2+4x

122. ## math, science

An atomic force microscope cantilever, of rectangular cross section, has a length, l, of 200μm, a width, b, of 20μm and a depth, h, of 1μm. It is made of silicon nitride, which has a Young's modulus, E, of 300GPa. What is the maximum force that can be

123. ## English

The oven has been turned off for an hour and thirty minutes. Phrase: turned off for an hour and thirty minutes Verb: had been Subject:oven The secretary and the accountant walked around and found the missing notebook in the trash can. Verb: walked Subject:

124. ## Math

4*6 -: 4-19+1,950,250= -: means divid

125. ## French

How do I make this passé composé J'aime toutes les saisons mais, l'automne est mon favori. L'automne n'était jamais trop chaud ou trop froid. Aussi, j'ai aimé le changement coloré des feuilles. Mon deuxième favori était le printemps parce que j'ai

126. ## math

Can someone check my answers & tell me what I did wrong if I did any? 1.) John paid \$32 for 2 concert tickets & 1 program AND Romona paid \$36 for 2 concert tickets and 2 programs. If all concert tickets were priced the same, how much did ONE concert ticket

127. ## AP Physics

A mystery surprise box is sliding down a ramp at a constant speed. The box has a mass of 55.0kg and the ramp makes a 40.0œ angle with the horizontal. What is the coefficient of kinetic friction between the box and the ramp? Please help asap. Thank you.

128. ## AP Physics

A large box has a mass of 500kg and the coefficient of static friction for the box and the floor is 0.45, and the coefficient of kinetic friction is 0.30. a. What is the minimum horizontal force needed to get the box moving? b. If you continue to push with

129. ## Chemistry

Which of the following nitrogen-containing compounds would supply the most nitrogen per gram of fertilizer? a. iron azide, Fe(N3)2, MW = 140 g/mol b. sodium azide, NaN3, MW = 65 g/mol c. potassium nitrite, KNO2, MW = 85.1 g/mol d. potassium azide, KN3, MW

130. ## Science

For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, explain how this result occurs a) after removing the flask from the water bath, the experimenter cools the

131. ## ap physics

The acceleration due to gravity on the moon has a magnitude of 1.62 m/s. deal with a placekicker kicking a football. Assume that the ball is kicked on the moon instead of on the earth. Find (a) the maximum height H and (b) the range that the ball would

132. ## Physics

A marble and a cube are placed at the top of a ramp. Starting from rest at the same height, the marble rolls without slipping and the cube slides (no kinetic friction) down the ramp. Determine the ratio of the center-of-mass speed of the cube to the

133. ## Physics

A ball is dropped from a building, after 2 sec another ball is thrown downward. After 6 sec the second ball overtook the first ball. Is the second ball has greater acceleration than the first ball? Explain.

135. ## English

Hi what is a counter agrument? Thanks

136. ## math

Let f(x)=(3x-7)/(x+1) What is the range of f? Answer in interval notation. (The domain is (-inf,-1) U (-1,inf)

137. ## mpc

A reasearcher wishes to be 95% confident that her estimate of the proportion of two individuals who travel over sea is within 4% of the true proportion. Find the sample necessary if in a prior study a sample of 200 people showed that 40 traveled overseas

138. ## math

write the equation a) 250mg of a drug has a half life of 3 hours b) the population of acity with 34560 people growns 3% each year c) 100 people brought a new product the first month. the number of people who buy the product doubles every 5 months.

139. ## Chem

1) A saturated solution of the slightly soluble salt MA3 is 1.4 ×10^–3 M in MA3. What is its Ksp value? 2) A 20.0 mL sample of NaIO3 was treated with an excess of KI and HCl and the iodine produced titrated with 0.05125 M Na2S2O3. 19.35 mL of Na2S2O3

140. ## math

The base of a rectangular prism has a length of 13 inches and a width of 1/2 inch. The volume of the prism is less than 65 cubic inches. Find all possible heights of the prism. Show all your work as an inequality. THANK YOU!!

141. ## Chemistry

Calculate the number of ion 16g H2CO3

142. ## physics

Alice has a mass of 70.0 kg and her car has a mass of 1000.0 kg. Alice is sitting in parked car on the side of the road. The magnitude of the normal force exerted by the road on her car is? (use g = 9.81 m/s2)

143. ## Physics

A proton, moving with a velocity of vi, collides elastically with another proton that is initially at rest. Assuming that after the collision the speed of the initially moving proton is 2.90 times the speed of the proton initially at rest, find the

144. ## MBA ( accounting)

Identify several ways in which you currently use accounting information in your life as a student. Also identify several situations in which, while you are still a student, you might be required to supply financial information about yoursekf to others

145. ## finance and accounting

Identify several ways in which you currently use accounting information in your life as a student. Also identify several situations in which, while you are still a student, you might be required to supply financial?

146. ## Genetics/Bio

Having a hard time with these two questions. Processing of ribosomal RNA (rRNA) includes all of the following EXCEPT: 1. snoRNA-dependent trimming. 2. snoRNA-dependent nucleotide modification. 3. snoRNA-dependent splicing. 4. snoRNA-dependent cleavage.

147. ## English

Has anyone read "The Destructors" who can help me with a few questions? My questions are: The mood on "The Destructors" is best described as humorous horrific adventuresome cold In "The Destructors" Greene uses a lot of ___ in the boy's language to enrich

148. ## physics

An airplane travels 3900 km at 810 km/h, and then encounters a tailwind that boosts its speed to 950 km/h for the next 3000 km. What was the average speed of the plane for this trip? 3900+3000 6900 6900/8 862.5

149. ## math

If an airplane travels at a speed of 450 km/h, how many meters does it travel in 10 seconds?

150. ## Chemistry

It is common in this experiment for students to calculate percent yields for the reaction that are above 100%. Is this result a violation of the law of conservation of matter? I need help writing an essay based on this prompt.

151. ## Math

If n represents a number, write an expression for one-half of three less than the number.

152. ## physics

two force vectors, f1 18N at 60 degree above the positive axis and F2 6.5N at 45 degree below the positive axis, are applied to a particle at the origin. what third force f3 would make the net force on the particle equal to zero

5.85gof Naclis Dissolvedin250mlofsolution.Calculatethemass%ofsolute?

154. ## Physics "Simple" Energy Problem

Jonathan is riding a bicycle and encounters a hill of height 6.70 m. At the base of the hill, he is traveling at 5.00 m/s. When he reaches the top of the hill, he is traveling at 3.00 m/s. Jonathan and his bicycle together have a mass of 77.6 kg. Ignore

155. ## Algebra 2

Give the domain of the function. g(x)= x^3-1 I think the domain is all real numbers. Am I wrong? If so why?

156. ## Chemistry

For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the

157. ## Math

Sue mom baked 12 cookies. Sue ate 3 for snack what fraction of the cookies did she eat.

158. ## physics

Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1 A ⋅ h and 1.58 V keep a 1 W flashlight bulb burning?

159. ## math

write a partitive division story problem fo 45 divided by 3/5

160. ## physics

A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore normal beating. Find the temperature increase caused in the 8.00 kg of affected tissue if all the energy heats up the tissue with a specific heat capacity

161. ## physics

Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round trip time. The taken for the laser pulse to travel there and back again can be measured to

162. ## Math

Shiela spent \$120 on a coat. She spent 2/3 of her remaining money on a dress. She's left with 1/5 of her money. How much he money did she have to begin with?

163. ## Chemistry

I recently calculated for concentration needed to my solution to get -1.5MPa PEG 6000 and I got 0.05g PEG/g H2O but I don't know how to convert this to moles/ L which is more familiar to me and more easier for preparing solutions. Please help.Thank you

164. ## Geography

Why would countries be concerned with their population decreasing? Why would countries be concerned with their population increasing?

165. ## math

The length of a rectangle is 9 cm more than its width. If its perimeter is 56 cm,find length and its area?

166. ## Geography

more developed countries do not have a population growth problem rather their population is steady or decrasing why

167. ## Government

What usually happens to the presidents incumbent party in the midterm elections?

168. ## match

a bowl contains 6 red,12 green and a number of blue ball.How many blue ball are in the if the probability of choosing a red ball in 1/6

169. ## Mechanical behavior

This part I have: 1)Derive an equation for the bending deflection δ of the bat at B, where the ball hits the bat, in terms of the applied load, P, the span, lAB, the Young's modulus of ash, E and the moment of inertia of the cross section, I. Answer:

170. ## chemistry

why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid soulution?

171. ## Geography

Why would countries involved in primary and secondary economic growth still have rapidly increasing population?

172. ## physics

an object of mass 10kg moves in a circle of radius 13m of uniform speed of 43m\s a) calculate the angular velocity b) the centripetal force

173. ## early childhood

Day care professionals and teachers reinforce the importance of responding to literature as a pleasurable experience by: A. having the child retell the story after reading. B. asking “yes/no” questions after reading the story. C. asking specific recall

174. ## chemistry

calculate the mass in grammes of copper that will be deposited by dissolving 6.5g of zinc in copper tetraoxosulphate(vi) solution

175. ## chemistry

a solution is known to contain Cl, NO3, NO2, and SO4 ions. which of these ions can be positively identified?

176. ## math

the point of intersection of the diagonals of a quadrilateral divides one diagonal in the ratio 4:5. is it parallelogram ?

177. ## Hkl

when rounded to the nearest 10, am 20. I am an odd number. The difference in my digits is 1, am greater than 21, what number am l

178. ## math

graph the equation by tanslationg y=[x] y=[x+7]

179. ## Geometry

The polar coordinates of the two opposite bordering points of a diagonal of a square are (6,3) & (-2,-3). What are the coordinates of the other two bordering points?

180. ## college

Select the properly punctuated sentence. a. Please let me know; when I may contact you. b. Please let me know, when I may contact you. c. Please let me know when I may contact you.

181. ## Math

Claudia is celebrating her birthday 18th. A year have 12 months. About haw many months lived Claudia in 18 years?.

182. ## math

A rectangular garden was planted measures 12 ft by 8 ft. You want to plant a border of roses around the garden of equal width with the same area as the garden. What should the width of the border of roses be?

183. ## Math - Arithmetic question

I have a question about the limits to Arithmetic problems, on my homework I've noticed that so far all of the arithmetic sequences limits are infinite (-infinity or +infinity, I was just wondering if all the limits to Arithmetic problems are to an infinity

184. ## physics

a body travels from rest with acceleration 8ms find its velocity when it has covered a distance of 100m

185. ## Chemistry

For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the

186. ## Geography

How was the US involved in the past in the internal affairs of Cuba and Haiti?

187. ## Government

Explain the primary/caucus system for nominating presidential candidates

188. ## math

A circular mirror is edged with a decorated plastic tape.If the radius of the mirror is 12.5cm.What is the length of the tape?

189. ## Geography

What has been the US policy since the CUban Revolution toward refugees from Cuba? Answer : The US had long had a policy of accepting all refugees from Cuba What is the US Policy Today?

191. ## Children with Special Needs

Hello! So I have a question regarding a topic to do on Children with special needs, so I have researched and chose children with special needs. Now I want your help in choosing a research question for example “Is childhood anxiety a result of one’s

192. ## Chemistry

Calculate the molarity of a solution prepared by dissolving 10.0 grams of NaOH and then diluting the solution to 500mL.