# Questions Asked onFebruary 28, 2015

1. ## Calculus (Partial Derivatives)

Using x hours of skilled labor and y hours of unskilled labor, a manufacturer can produce Q(x,y)=40xy1/5 units each week. Currently 20 hours of skilled labor and 243 hours of unskilled labor are being used. Suppose the manufacturer reduces the skilled

2. ## Chemistry

For the reaction 4A (g)+3B (g)=C(g) the following data were obtained at constant temperature: Experiment- 1. Initial (A) (mole/L) 0.0500, 01000, 01000 , 0.0500 2. Initial (B) (mole/L) 0.0500, 0.0500, 0.1000, 0.0500 3. Initial (C)(mole/L) 0.0100, 0.0100,

3. ## Vectors Math

I was given this info r=1.5 m d=3 m F= 50 N angle= 110 degrees 1. What torque is APPLIED ? T=Fsin T= (1.5)(50)sin(110) T=70 N m 2. At what angle would enough force be applied to achieve maximum toque? T=Fsin T= (1.5)(50)sin(10) T=13.0 N m 3. If someone

4. ## Vocabs

1. When we saw the breathtaking (parody, panorama, relic, grit) on that lovely autumn morning, we did not want to miss the stunning vista and decided to (maneuver, amble, balk, compact) rather than rush. Panorama; amble 2. I am always (deluded, ingrained,

5. ## algebra

1. ratio a is equivalent to ratio b. ratio b is equivalent to ratio c. is ratio a equivalent to ratio c? 2. you are 13 years old, and your cousin is 19 years old. as you grow older, is your age proportional to your cousin's age?

6. ## Chemistry

Need Help! 1. Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g)+3H2(g)→2NH3(g)ammonia How many moles of N2 reacted if 0.65mole NH3 is produced? How many moles of NH3 are produced when 1.2moles H2 reacts? 2.In the acetylene torch,

7. ## Vectors

Expand to the general case to explore how the cross product behaves under scalar multiplication k (a x b) = (ka) x b = a x (kb).

8. ## Chemistry

Even when a mechanism is consistent with the rate law , later experimentation may it to be incorrect or only one of several alternative. As an example, the reaction between hydrogen and iodine has the following rate law: rate=k[H]^3[I]2. The long accepted

9. ## Chemistry

Acetone is one of the most important solvents in organic chemistry, used to dissolve everything from fats and waxes to airplane glue and nail polish. At high temperature, it decomposes in a first order process to methane and ketene (CH2=C=O).At 600C, the

10. ## chemistry

One of the ways to produce iron is to take iron(II) oxide and react it with carbon monoxide to get pure iron and carbon dioxide. The reaction is FeO(s) + CO(g) = Fe(s) + CO2(g). What is the partial pressure of CO2(g) if 2.00 atm of CO and excess iron(II)

11. ## physics

A 2200 kg car traveling at 8.7 m/s collides with a 2750 kg car that is initially at rest at the stoplight. The cars stick together and move 2.00 m before friction causes them to stop. Determine the coefficient of kinetic friction between the cars and the

12. ## math

Find the roots of the quadratic equations x^2 - 1/12x -1/12 = 0 ?

13. ## math

Divide 12 into two parts such that the sum of their square is 74?

14. ## Chemistry

At body temperature (37C), K of an enzyme-catalyzed reaction is 2.3x10^14 times greater than k of the uncatalyzed reaction. Assuming that the frequency factor A is the same for both reaction, by how much does the enzyme the E^a?

15. ## Physics

Hey, I'm studying for my physics class, and I'm not sure how to solve this problem. Can someone walk me through it please? I'd really appreciate any help! John throws a baseball from the edge of a cliff with an initial velocity of 17.0 m/s at an angle

16. ## probability

Let K be a discrete random variable with PMF pK(k)=⎧⎩⎨⎪⎪1/3,2/3,0if k=1,if k=2,otherwise. Conditional on K=1 or 2, random variable Y is exponentially distributed with parameter 1 or 1/2, respectively. Using Bayes' rule, find the conditional PMF

17. ## Art

What is one way that the industrial revolutions impact showed itself in the art of realist like Monet? A. Realists documented their inner reactions to the revolution B. realists documented the lives of rules and the wealthy C realists documented the

18. ## math

A ship leaves an island (5°N, 45° E) and sails due east for 120 hours to another island. Average speed of the ship is 27 knots. Calculate the distance between the two islands In nautical miles In kilometers

19. ## physics

a rectangular loop with a=6.0 cm, and b=4.0 cm, moving with a velocity v=8.0 cm/s into an area where the magnetic field is uniform, pointing into the page, and whose magnitude is B= 440 mT. a) What is in volts the induced emf in the loop when the loop is

20. ## philosopy

Do you agree with Bruce Hinrichs (in Kessler) that there is no good reason for people to feel "threatened or dehumanized" if scientific studies showed that the human mind is nothing more than the physical brain - and, more generally, that humans are

21. ## Statistics

Science scores for high school seniors in the United States are normally distributed with a mean of 78 and a standard deviation of 10. Students scoring in the top 10% are eligible for a special prize consisting of a laptop and \$2,000. What is the

22. ## chemistry

50.0 mL of a solution of HCl is combined with 100.0 mL of 1.15 M NaOH in a calorimeter. The reaction mixture is initially at 22.4°C and the final temperature after reaction is 31.2°C. What is the molarity of the HCl solution? You may assume that there is

23. ## physics

A rectangular loop with a=2.9 cm, and b=1.9 cm, moving with a velocity v=3.8 cm/s into an area where the magnetic field is uniform, pointing into the page, and whose magnitude is B= 450 mT. a) What is in volts the induced emf in the loop when the loop is

24. ## Calculus (Partial Derivatives)

A car dealer determines that if gasoline-electric hybrid automobiles are sold for x dollars apiece and the price of gasoline is y cents per gallon, then approximately H hybrid cars will be sold each year, where H(x,y)=6000−13x^(1/2)+2(0.1y+20)^(3/2). She

25. ## English

____1__ young people may be able to list the many accomplishments of the Reverend Dr. Marting Luther, King jr. They may know that he was a civil rights leader who aspired to achieve racial harmony and was an __2__ of peaceful but direct action. They may

26. ## Chemistry

Consider the uni molecular reaction cyclopropane? Propylene. The value of log A for high pressure limit is 15.17. Calculate the value of S? For the reaction. Calculate the contribution of S trans in the above reaction at 298K?

27. ## Finance

you have to replace a copy machine and you have 2 offers. both offers 3 year leases. offer 1 requires an up-front payment of \$1700 with additional payments of \$1200 at the beginning of years 2 and 3. The firm is also charged one-half of 1 cent, (\$0.005),

28. ## physics

the water in a 0.5 km wide river is flowing at 5 m/sec from west to east. a man row a boat with a velocity of 13 m/sec in a direction of north west relative to water. find the time taken to cross the river so that man reaches exactly at same point to

29. ## English

I like baseball, it teaches me about the sport and it’s also fun.

30. ## physics

an arrow is shot into the air with an initial velocity of 100m is at elevation of 60 degree find. a the time of flight b the maximum height attained c the range

31. ## Math

A multiple - choice quiz contains 5 questions with 4 choices for each answer. A student passes the quiz if they get at least an 80% on the quiz . If a student guesses on every question , find the probability that she passes the quiz . I have tried

32. ## ap calc

find the volume generated by revolving the area bounded by y=-x^3, y=0, and x=-2 about the line x=1. I know how to the solve the problem but am not sure how to get the interval. Please help.

33. ## statistics

how to summarize statistic assumption

34. ## Chemistry

A principle of green chemistry is that the energy requirement of industrial processes should have minimal environmental impact. How can the use of catalysts lead to "greener" technology?

35. ## Physics

In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which time it experiences an acceleration of 380 m/s2. The ball is launched at an angle of 51° above the ground. Determine the

36. ## probability

For each one of the following figures, identify if it is a valid CDF. The value of the CDF at points of discontinuity is indicated with a small solid circle. (original images belonging to: "The science of uncertainty") 1. No, it is not a valid CDF 2. Yes,

37. ## St Dans

Amite wants to make a mold for a candle. She wants the shape of the candle to be a rectangular prism with a volume of exactly 23 cubic centimeters. She wants the sides to be whole centimeters. How many different molds can she make?

38. ## Physics

In diving to a depth of 785 m, an elephant seal also moves 410 m due east of his starting point. What is the magnitude of the seal's displacement?

39. ## Sgt

raymond wants to make a box that has a volume of 360 cubic inches. He wants the height to be 10 inches and the other two dimensions to be whole numbers of inches. How many different-size boxes can he make?

40. ## Physics

A 42 kg man stands on a bathroom scale in an elevator. Starting from rest at the bottom floor, the elevator ascends, attaining its maximum speed of 1.95 m/s in 1.22 s. It travels with this constant speed for the next 7.80 s. The elevator then slows down

41. ## VECTORS (need help)

I was given this info r=1.5 m d=3 m F= 50 N angle= 110 degrees 3. The attempt at a solution T=Fsin T= (1.5)(50)sin(110) T=70 J How do i get (maximum) torque?

42. ## Physics

Can someone help me with this problem? It requires a lot of visualizing and I've never been great at problems like that. A pair of blocks of mass m1 =29.0 kg, and m2 =58.0 kg, are being pushed on a horizontal surface by a constant forces of magnitude

43. ## Vocabs

negative 1. It was quite common for outlaws of the wild west to have several (names, aliases. aliases neutral 2. The gymnast achieved (meteoric, rapid) fame after her Olympic debut. Meteoric negative 3. Our cat (balked, hesitated) when I opened the door to

44. ## Physics

A fire hose ejects a stream of water at an angle of 30.9° above the horizontal. The water leaves the nozzle with a speed of 26.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

45. ## Physics

An airplane is flying with a velocity of 248 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When the altitude of the plane is 2.5 km, a flare is released from the plane. The flare hits the target on the ground. What is the angle θ?

46. ## Math

Write a possible explicit rule for the nth term. 20, 40, 80, 160, 320 a sub n = 20(2)^n-1?

47. ## Physics

Two boats are heading away from shore. Boat 1 heads due north at a speed of 4 m/s relative to the shore. Relative to boat 1, boat 2 is moving 35° north of east at a speed of 1.2 m/s. A passenger on boat 2 walks due east across the deck at a speed of 1.3

48. ## Vocabs

Replace the boldface words in the sentences below. Then explain how connotation of the replacement word changes the tone of the sentence. Choices: unerring, replenished, sabotaged, foiled, stealthy, engulfed 1. Once again the police were vicarious when

49. ## maths

find the lowest common multiple of 45 and 60

50. ## probability

This figure below describes the joint PDF of the random variables X and Y. These random variables take values in [0,2] and [0,1], respectively. At x=1, the value of the joint PDF is 1/2. (figure belongs to "the science of uncertainty) 1. Are X and Y

51. ## probability

Determine whether each of the following statement is true (i.e., always true) or false (i.e., not always true). 1. Let X be a random variable that takes values between 0 and c only, for some c≥0, so that P(0≤X≤c)=1. Then, var(X)≤c2/4. TRUE 2. X and

52. ## chemistry

Hi Please ... is the absolute temperature equal temperature in kelvin? Thanks for you

53. ## Criminal Justice

In order to make the most of every opportunity to preserve evidence and to ensure a complete investigation, the investigator should always: A. refrigerate evidence to preserve it. B. call for a second investigator to help out. C. strive to involve evidence

54. ## government

the principles of separation of powers is necessary if government tyranny is to be avoided; Discuss

55. ## Torque Vectors Question (HELP)

I was given this info r=1.5 m d=3 m F= 50 N angle= 110 degrees 1. What torque is applied? T=Fsin T= (1.5)(50)sin(110) T=70 J 2. At what angle would enough force be applied to achieve maximum toque? T=Fsin T= (1.5)(50)sin(90) T=75 (joules) 3. If someone

56. ## Math

Help me set up the matrices for this! I can solve it, but having a difficult time getting the matrix set up. A pharmacist mixes together three types of vitamin tablets. Each Tablet A contains, among other things, 12 mg of niacin and 10 I.U. of vitamin E.

57. ## Math

Write a possible explicit rule for the nth term. 1/2, 1/4, 1/6, 1/8, 1/10

58. ## math

If the elevator has an upward acceleration of 2.60m/s^2 and the balance reads 60.0 N, what is the true weight of the fish?

59. ## Religion

State the Argument from Religious Experience, does God really exists? *Explain the argument's strengths * Explain (two) of the argument's weaknesses *Explain which attributes of God are supported by the argument. For example, "Is the God proven to exist

60. ## geography

how did cultural diffusion impact the development of japan

61. ## Science

Describe the total momentum of billiard balls before and after the cue ball collides with another ball

62. ## Geometrt

Casey sights the top of an 84 foot tall lighthouse at an angle of elevation of 58 degrees. If casey is 6 feet tall, how far is he standing from the base of the lighthouse?........ Do I use cos, tan, or sin? I did the rest of the worksheet but I'm not sure

63. ## Earth Science

Which of the following does NOT occur at a convergent boundary? A. The leading edges of both plates are bent downward. B. Oceanic crust is pushed down into the mantle. C. One continental plate moves into an oceanic plate. I think it's C

64. ## chemistry

Equilibrium is: a dynamic condition in which the concentration of the reactants is equal to the concentration of the products. a static condition in which the concentration of the reactants is equal to the concentration of the products. a static condition

65. ## chemistry

Lead iodide is a relatively insoluble compound. It can dissolve from the solid phase into the aqueous phase with a Keq of 0.00027. If the concentration of lead iodide in the aqueous phase 0.125 M, then: a. we need more information to determine the progress

66. ## physics

A 3.49 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. The composite system moves with a speed equal to one-seventh the original speed of the 3.49 mud ball. What is the mass of the second mud ball?

67. ## Math

The sum of the ages of Dorothy and Dona is 41. In five years, Dorothy will be twice as old as Dona. Find their ages 3 years ago.

68. ## formulas

i want to lay carpet in a rectangular room30x20 how much carpet will i need

69. ## Chemistry

What is the uncertainty (+/- ?) of molar concentration (M)?

70. ## calculus 2 extremely difficult

The function is r(t)= 400texp(-0.2t^2) and it shows the rate at which people show up in a line outside a theatre to buy tickets. t is the number of hours after 8:00am Assume there is no people at 8:00am and the patrons are served at a constant rate of 200

71. ## physics

A 39-turn circular coil of wire has a diameter of 1.2m. It is placed with its axis along the direction of the Earth's magnetic field of 58μT at 52° below the horizontal, and then in 0.16s it is flipped 180°. a) What is volts the magnitude of the average

72. ## Programming

A sweater is on sale for 25% off the original price. The original price is \$50 write a solution to calculate and print the sale price.

73. ## applyng fundamental concepts

Which of the following examples describes a child in the symbolic level? A. A child who can't identify numbers above 10 B. A child lining up Unifix Cubes in a row C. A child who figures out the answer to 2 + 5 in his/her head D. A child who counts up using

74. ## Problem Solving

Michael has designated 5% of his paychecks for the year for presents (birthday, Monther's day, etc.) Write a solution to calculate the amount of money he can spread give the amount of money he earns.

75. ## linear algebra

1 0 2 −2 0 1 0 0 1 0 −1 −1 2 0 0 0 −1 2 1 0 Is the set S = {v1, v2, . . . , vk} linearly independent?

76. ## Probability

Can someone help me with this question? In the game of craps, a player loses a pass line bet if a sum of 2, 3, or 12 is obtained on the first roll. In another version of the game called crapless craps, the player does not lose by rolling craps, and does

77. ## Algebra Answer ASAP thx!

(Rewrite each fraction with all the variables in the numerator) 8c^5/11d^4 e^-2

78. ## English

1) charisma: A)feelings. B) personal appeal. C)luck 2)contemporary A)common. B) old-fashioned C)today's 3)contend A)to wish B) to deny C)to declare 4)conversely A)in contrast. B) in a modern way C)similarly 5)extrovert A)a supporter of causes. B) a timid

79. ## applyng fundamental concepts

To match figures with corresponding silhouettes, children need to develop the concept of A. spatial relations. B. graphing. C. symbols. D. measurement. my answer is c.

80. ## chem

In the laboratory you are asked to make a 0.574 m iron(III) nitrate solution using 315 grams of water.

81. ## Math

To make 4 1/2 gallons of ice cream, it takes 6 3/10 gallons of milk. How many gallons of milk does it take to make one gallon of ice cream?

82. ## Language Arts

Which of the following sentences uses a predicate noun? A. When you leave, I will feel sad. B. My sister is their most valuable player. C. Their most valuable player is she. D. I will be saddened when you leave. Thank you for any help you give!

83. ## applying fundamental concepts

An understanding of which of the following processes is needed to do patterning skills? A. Pictorial mapping B. Algebraic thinking C. Numeral recognition D. Seriation my answer is d.

84. ## Physics

An unstable nucleus with a mass of 18.0 ✕ 10-27 kg initially at rest disintegrates into three particles. One of the particles, of mass 4.1 ✕ 10-27 kg, moves along the positive y-axis with a speed of 8.0 ✕ 106 m/s. Another particle, of mass 7.7 ✕

85. ## Physics

A 4.1 g dart is fired into a block of wood with a mass of 20.2 g. The wood block is initially at rest on a 1.2 m tall post. After the collision, the wood block and dart land 2.6 m from the base of the post. Find the initial speed of the dart.

86. ## science

If an object is thrown 60m into the air and it takes the object 6s to get there what's there average speed of the object

87. ## chemistry 2

For the simple decomposition reaction below, rate = k[AB]2 and k = 0.30 L/mols. AB(g) A(g) + B(g) If the initial concentration of AB is 1.20 M, what is [AB] after 10.0 s?

88. ## English 102

IS this a good research question? What stage of childhood development does research show how experiences affect brain development and why?

89. ## calculus

Find relative Minimum and Maximum f'(x) = (9-4x^2)/ (x+1)^1/3

90. ## Malaysian Legal System II

Write a research paper detailing the criminal justice systems of England and Malaysia, and outline any differences in how criminal justice functions in both systems.

91. ## Chemistry

A 45.4 grams of a gold metal sample was heated with the amount of energy of 228 J. Which of the following would the most plausible temperature change of the gold sample? The specific heat of gold is 0.131 J/g.oC. 12.8 oC to 38.3 oC 24.4 oC to 81.6 oC 23.8

92. ## spanish

Hello, I need to double check for incorrect grammar and sentence flow. Thank you very much. I am writing a (1) biography of Juan de Villanueva, (2) his architectural themes, (3) his styles, and (4) a personal/anecdotal interpretation of his work. I am okay

93. ## Physics

Three cylindrical blocks x, y and z are made of different materials of densities 2g/cm3, 5g/cm3 and 10g/cm3 respectively. If the side of each block resting on a level surface has an area of 2cm2, 4cm2 and 6cm2 and the height of block x is 10cm calculate;

94. ## Health

Does a diet will help you lose 10 pounds in 3 days debunk the nutrition myth? My answer is yes

95. ## Chemistry Help

How many moles of H2 and N2 can be formed by the decomposition of 0.250 mol of ammonia, NH3? Is it 0.250*3mol H2=0.75 0.25*1mol N2=0.25 Am I correct?

96. ## english

Use an apostrophe when writing about someone (a noun) that has possession of something. A) true b) false. Is the answer a) true?

97. ## calculus

Find the area of the region bounded by the curves y=x^2 & y=2x???

98. ## Accounting

formation about the Maxwell Company's inventory of one item during 2010 is given below. Units Unit Cost Beginning Inventory, Jan 1, 2010 80 \$24.00 Purchases: March, 2010 45 24.00 July 2010 75 22.00 Nov. 2010 100 21.00 Ending Inventory, Dec. 31, 2010 55

99. ## Chemistry

how many moles of solid mg(oh)2 should you ad to 200 ml of .15M acetic acid solution to produce ph 4.0 buffer?

100. ## Science

Organs like the liver, lungs, and intestines, each perform a specific job. COMPARE AND CONTRAST: How are the organs in a model of a human body the same and how are they different? Thx!!

101. ## aircondition & refrigerator

how many kj will be absorbed in changing 93kj to it at 20degree celsius to water in 40degree celsius show working

102. ## Chemistry

Vapour pressure of ideal solutions at 25c the vapour pressure of chloroform and carbon tetrachloride are 26.54 and 15.27 kpa respectively. If the liquids from ideal solutions. (A) what is the composition of the vapour in equilibrium with with a solution

103. ## Chemistry

The magnetic moment (mu) values for Cs2 (MnCl4), k4 (Mn (CN) 6) and K2 (Ni (CN) 4) are 5.9 , 1.8 and 0 B.M, respectively. Explain the difference of these values based on the Valence bond theory.?

104. ## Chemistry

You are staying the reaction A2 (g)+B2 (g)=2AB (g) To determine its rate law .Assuming that you have a valid experimental procedure for obtaining (A2)& (B2) at various times, explain how you determine (a)the initial, (b) the reaction order, & (c) the rate

105. ## Chemistry

Define the-half of a reaction. Explain on the molecular level why the half- life of a first-order reaction is constant

106. ## calculus

Find the area between the curves y=x^2 & x=2?

107. ## lifeorientation

wht is the six symtoms of intrapersonal conflict in a person

108. ## Chemistry

If the temperature in problem 16.60 (25C), by what factor does the fraction of collisions with energy equal to or greater that the activation energy change?

109. ## Social Studies

The people of Brazil can best be decribed as A Primarily indigenous in descent B largely of the white European ancestry C mestizos with shared-indigenous heritages

110. ## physic

a projectile is fired from the ground level with a velocity of 500ms at 30 degree to the horizontal. Determine 1 it's horizontal range 2 the greatest vertical height reached 3 the time taken to reach this height (g=10mls2

111. ## physics

an anti aircraft gun fires at an elevation of 60 degree at an enemy air at 10.000 m above the ground. AE what speed must cannombe shot to hit the plane at the height (g=10m50)

112. ## english

Is traditional african marriage an advantage for man only? Write a reason

113. ## Life orientation

To what extent can intrapersonal conflict affect communication relationships

114. ## Social Studies

The people of Brazil can best be decribed as A Primarily indigenous in descent B largely of the white European ancestry C mestizos with shared-indigenous heritages

115. ## english

Revise the following word groups to remove all fragments and/or parallelism errors. I like baseball because it is fun and teaches me about the sport. My Answer I like baseball, it teaches me about the sport and it’s also fun.

116. ## geography

how geography affects the way of life in japan

117. ## Physics

A 2302 kg block of granite is pulled up an incline that has an angle of inclination of 17.0 o with a constant speed of 2.22 m/s by a steam winch (see Figure). The coefficient of kinetic friction between the block and the incline is 0.340. How much power

118. ## geography

why did the mongol dynasty collapse

119. ## Chemistry

Define the-half of a reaction. Explain on the molecular level why the half- life of a first-order reaction is constant

120. ## geography

describe the food people achievements inventions art and architecture of china under kublai khan

121. ## To Nombuso

I removed your post because you included personal contact information. That is not a safe thing to do online. --------------- Ask your school counselor for help. What are your grades in those classes? If they're high, then you have more choices. What do

122. ## Physics

A solid cylinder is pivoted at its center about a frictionless axle. A force is applied to the outer radius of 1.27 m at an angle of 30 ◦ above the tangential and exerts a force of 5 N. A second force is applied by wrapping rope around the inner radius

123. ## Math

3m/4n * 2n/5m^2

124. ## ap calc

Find the area of the shaded region, bounded by the parabola 16y=5x^2+16 and the lines y=0, y=6, and x=5. I broke the figure up into two parts and got 3102/5. It seems like a large answer am I correct? Your help is greatly appreciated.