# Questions Asked onOctober 20, 2012

1. ## Physics

A 1.00kg ball and a 2.00kg ball are connected by a 4.63m long rigid, massless rod. The rod is rotating clockwise about its center of mass at 33.0rpm. What torque will bring the balls to a halt in 4.07s? My Attempt: Center of Mass = [(1kg)(0m) +

2. ## geometry

find the similarity ratio of a cube with volume 729 m^3 to a cube with volume 3,375 m^3?

3. ## AP Chemistry

Consider the following reaction. CaSO4(s) Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4 10-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what are the equilibrium

4. ## Physics

The cheetah is one of the fastest-accelerating animals, because it can go from rest to 18.2 m/s (about 41 mi/h) in 2.7 s. If its mass is 114 kg, determine the average power developed by the cheetah during the acceleration phase of its motion. Express your

5. ## Chemistry

If the standard enthalpy of combustion of octane, C8H18(l) is -5471 kJ/mol, calculate the enthalpy change when 1.00 kg of octane are burned. the molar mass of octane is 114 g/mol

6. ## College Physics

A uniform horizontal rod of mass M and length l rotates with angular velocity w (omega) about a vertical axis through its center. Attached to each end of the rod is a small mass m. Determine the angular momentum of the system about the axis. Write you're

7. ## chemistry

A very flexible helium-filled balloon is released from the ground into the air at 20 degree C. The initial volume of the balloon is 5.00 L, and the pressure is 760 mmHg. The balloon ascends to an altitude of 20km, where the pressure is 76.0 mmHg and the

8. ## Trigonometry

The average temperature, in °F, for Atlanta, GA is modeled by the sinusoidal function y = 18.25 sin(pi/6 t - 2.09) + 61.15 where t is the time in months and January is t=1. What is the average Temperature for the month of February? Using the same

9. ## Physics

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by seven-time-winner Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do

10. ## math

the product of a 1 digit number and a 2-digit number number is 284 what is the answer

11. ## Stats

Cans of regular Coke are labeled as containing 12. Statistics students weighted the content of 10 randomly chosen cans, and found the mean weight to be 12.1. Assume that cans of Coke are filled so that the actual amounts are normally distributed with a

12. ## chemistry

Consider 4.50L of a gas at 365 mmHg and 20 degree C . If the container is compressed to 2.70 L and the temperature is increased to 33 degree C , what is the new pressure, P2, inside the container? Assume no change in the amount of gas inside the cylinder.

13. ## statistics

Suppose you wanted to test your ESP using an ordinary deck of 52 cards, which has 26 black and 26 red cards. You have a friend shuffle the deck and draw cards at random, replacing the card and reshuffling after each guess. You attempt to guess the color of

14. ## MANAGERIAL ECONOMICS

In attempt to increase revenue and profits, a firm is considering a 4 percent increase in price and an 11 percent increase in advertising. If the price elasticity of demand is -1.5 and the advertising elasticity of demand is +0.6 would you expect an

15. ## maths

the 1st term of an ap is twice the common difference find in terms of the 5th term of the ap

asked by d 1st term of an ap is twice the common difference find in terms of the 5th term of the a
16. ## algebra

You live near a bridge that goes over a river. The underside of the bridge is an arch that can be modeled with the function y=-0.000475x^2+0.851x, where x and y are in feet. How high above the river is the bridge(the top of the arch)? How long is the

17. ## Discrete Mathematics

Find x in the following expressions: 1. (111)10 = (x)3; 2. (111)3 = (x)10; 3. (2012)10 = (x)7; 4. (2012)7 = (x)10;

18. ## Gen Chem

If the standard enthalpy of combustion of octane, C8H18(l) is -5471 kJ/mol, calculate the enthalpy change when 1.00 kg of octane are burned. the molar mass of octane is 114 g/mol

19. ## Math

A sample of n _ 11 scores has a mean of M _ 4. One person with a score of X _ 16 is added to the sample. What is the value for the new sample mean?

20. ## social studys

1. Because there was a reawakening of interest in art, literature, and science between 1300 and 1600, it is fitting to call this period the Renaissance, since it means _____. (1 point)learning knowledge "out with the old" rebirth 2. During the Middle Ages,

21. ## Chemistry

For 2 SO2(g) + O2(g) 2 SO3(g), Kp = 3.0 104 at 700 K. In a 2.00-L vessel the equilibrium mixture contains 1.58 g of SO3 and 0.136 g of O2. How many grams of SO2 are in the vessel?

22. ## I need help answering this Accounting question!?

While preparing the April 30th bank reconciliation for the checking account for Calvin Corporation, the accountant identified the following items: Calvin's balance according to the general ledger: \$15,000 Outstanding checks: 2,500 Bank service charge: 15 A

23. ## I need help answering this Accounting question!?

Bluejay Corp. prepared a bank reconciliation as of July 31, 2009. The following items were identified: Bluejay's bank statement balance: \$14,300 Deposit in transit: 1,000 Outstanding checks: 1,300 Bank service charges: 50 Customer's NSF check returned by

24. ## Calc

It is noon. A secret agent is driving a jeep through the desert in the tiny principality of Alta Loma. He is 32km from the nearest point on a straight, paved road. Down the road 16km is a power plant in which a band of international terrorists has placed a

25. ## College Algebra

An arrow is launched upward with a velocity of 54 feet per second from the top of a 75 foot building. What is the maximum height attained by the arrow in feet?

26. ## Chemistry

A mixture of C3H8 and C2H2 has a mass of 2.0g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. Find the mass of C2H2 in the original mixture.

27. ## chemistry

At 1 atm, how much energy is required to heat 49.0 g of H2O(s) at –12.0 °C to H2O(g) at 169.0 °C?

28. ## Math

By using the expansion (1 + x)^2. Prove 8[sigma notation]k=0 2^(3K)(N K) = 3^(2n). Thanks

29. ## math

by selling 90 computer a shopkeeper gains the amount which is equal to the selling price of 10 computer find the profit percent ? had he purchased them for rupees 30000 each what would have been the selling price of a computer ??

30. ## physics

Bonnie and Clyde are sliding 500 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 385 of force while Bonnie pulls forward on a rope with 300 of force.What is the safe's coefficient of

31. ## economics

1. Suppose that the market of laptops is given by following supply and demand curves given below: Qd = 5000 − 3p Qs = 1000 + p. Answer the following questions on excel sheet using the above demand and supply equations. i) Take the range of values for the

A water heater is fueled by the combustion of propane as described by the following reaction: C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(l) a) Determine how much heat is released if 11.2 moles of propane are burned at 298 K and at a constant pressure of 1.00

33. ## Math

How much mulch will you need to cover a rectangular garden that is 20 feet by 30 feet with a 3 inch layer of mulch? Explain.

34. ## Abnormal Psychology

In comparison to children with autism, children with schizophrenia A. tend to be younger at diagnosis. B. show a more chronic and declining course. C. show similar social and language deficits. D. show less intellectual impairment.

35. ## english

In “First Confession”, the author adds to the interest of the story by using? European Idioms. common phrases. short, highlighted sentences. Irish dialect.

36. ## physics

all the following are true about water except that it: a has a very high specific heat capacity compared to ther substances. b. takes a long time to heat up. c. takes a short time to cool off. d. makes the earths climates milder.

37. ## Math

The following chart shows the fraction of students who enjoy baseball, basketball, football, soccer, and swimming in the 7th grade. Baseball - 2/3 Basketball- 4/5 Football- 3/10 Soccer-5/6 Swimming-1/8 What fraction of students enjoys basketball and

38. ## statistics

I need help with p for a hypothesis test for normal distribution.

39. ## Mathematics

a particle moves in a straight line such that its position x from a fixed point 0 at time 't' is given by x= 5 + 8sin2t + 6cos2t 1. Find the period and amplitude of the particle. 2. Find the greatest speed of the particle. Thanks

40. ## physcis

a flight attendant pulls her 70 kg flight bag in an airport terminal holding the handle 50 degrees above the horizontal. she pulls the bag a distance of 200 m while exerting a 40 n force acting along the handle with a constant speed how much work does the

41. ## Discrete Mathematics

Find g := gcd(389,222) and a,b belongs to Z such that g = a.389 + b.222.

42. ## i need help ss

1. Because there was a reawakening of interest in art, literature, and science between 1300 and 1600, it is fitting to call this period the Renaissance, since it means _____. (1 point)learning knowledge "out with the old" rebirth 2. During the Middle Ages,

43. ## Discrete Mathematics

Let m,n,z belong to N such that m and n divide z and gcd(m,n) = 1. Prove that m.n divides z.

44. ## medical terminology

how to type a creative paragragh using medical abbreviations

45. ## Chemistry

Please show me how to work! Ethane, C2H6(g) can be made by reaction of hydrogen gas with acetylene, C2H2(g). the standard enthalpies of formation of ethane and acetylene are -84.68 and +226.73 kJ mol-1, respectively. what is the reaction enthalpy for the

46. ## Chemistry

Please show me how to work! thanks When Snno2(s) is formed form the comustion of gray tin, the reaction enthalpy is -578.6 kJ, and when white tin is burned to form SnO2(s), the reaction enthalpy is -580.7 kJ. Calculate the reaction enthalpu for

47. ## Chemistry

Calculate the number fo moles of NaOH(aq) needed to react completely with 125 mL fo 6.00 M H2SO4(aq)

48. ## science

A positive charge of 3.50 µC is located in an electric field of intensity 3.00 N/C directed toward the south. Find the magnitude and the direction of the force on the test charge. (remember E = Fon q' / q', and 1 µC = 1.00 x 10-6 C) a. 8.6 x 105 toward

49. ## math

prove the inequality sin x + tan x > 2x for x ¸ (0, pi/2) i don't know what i must do with this equation, can someone explain this to me step by step? >.

50. ## calculus

suppose that f(x) = x^3 x1 is differentiable at x=1 then a=?, b=?

51. ## Math

A particle is projected horizontally with velocity V m/s, from a point h meters above ground. Taking g ms^-2 as the acceleration due to gravity, 1. Show the equation of the path is given by y = (2hV^2 - gx^2)/ 2V^2 2. Find the range of the particle. Thanks

52. ## Precalc/Trig

what angle does the line y=6/7x make on the xy plane with a positive x axis?

53. ## college alegebra

√3x-2+√2x+5+1=0 Could this square root problem be solved by using a graphing TI-84 Plus calculator? If so, will you please tell me how to do it. Thanks

54. ## Precalc/Trig

what angle does the line y=6/7x make on the xy plane with a positive x axis?

the chord PQ joining the points P(2p, p^2) and Q(2q, q^2) on x^2 = 4ay always passes through the point A(2,0) when produced. show that (P+q) = pq thanks!

56. ## Geography

5 countries in Africa with coastlines on the Atlantic Ocean and lie between 20 degrees n and 10 degrees n? I think they are guinea,guinea-Bissau,Gambia,Senegal and Mauritania. Is this right?

57. ## Chemistry

How many mL of 0.200 M H3PO4(aq) must be added to 25.0 mL of 0.0888 M BaCl2(aq) to precipitate all the barium as barium phosphate?

58. ## PHI 103 Informal Logic

4. After being told that she is being punished for lying, a child responds by telling her mother that she also lied. This response may involve which fallacy? (Points : 1) Ad homimen (tu quoque) Ad verecundiam (ex libris) Ad misericordiam (ex ante) Ad

59. ## Math

What magnitude of earthquake would release energy equivalent to 35 trillion jules? I know the formula is: E= (2.5 X 10^4) X 10^1.5 X M

60. ## Chemistry

The standard enthalphies of formation of ozone, O3(g), and oxygen atoms are +142.70 and +249.17 kJ/mol. Calculate the reaction enthalpy for 2O2(g)-->O3(g)+O(g)

61. ## geometry

The surface areas of two similar solids are 289 ft2 and 900 ft2. The volume of the larger solid is 1,755 ft3. What is the volume of the smaller solid?

62. ## Chemistry

When 10.0 g of ammonium nitrate (molar mass= 80 g/mol) are dissolved in 1.00 L of water in a bomb calorimeter with a heat capacity of 2.30 kJ/ K, the temp drops 1.52 K. What is the molar enthalpy of solution of ammonium nitrate?

63. ## Precalc/Trig

Find the smallest positive number t such that e^sin(t)=1/2

64. ## Chemistry

If the standard enthalpy of formation of PH3(g) is +5.4 kJ mol-1, calculate the reaction enthalpy for 2PH3(g)--->2P(s)+3H2(g)

65. ## calculus

Write h(x) = 6x^4 - 2x^2 + 1 as a composition of two functions f and g

66. ## math

3x squared x=4

67. ## chemistry

How would you prepare 1000.0ml of 0.600M NaOH solution starting from concentration of 1.000M.

68. ## Chemistry

the following acid—base neutralization reaction HNO3 (aq)+ KOH (aq) --KNO3(aq) + H2O (I) What is the molarity (M) of an HNO3 solution if 50.0ml is needed to react with 25.0ml of 0.150M KOH solution?

69. ## Chemistry

Based on the following chemical equation answer the question below show all your calculation The balanced chemical reaction of iodine with hydrogen sulfide h2s(g)+i2(s)-----2HI(g) + S(s) (a) Based on the above chemically balanced equation, how many grams

70. ## Physics

Hello. I'm having difficulty with this question In the diagram, the coefficient of kinetic friction between the 2.00 kg and the 3.00 kg blocks is 0.300. The horizontal surface and the pulleys are frictionless, and the masses are released from rest. (a)

71. ## Calculus

does infinite power series -1/n diverge? (i think so, because it is just the negative of the harmonic series)...? thank you!

72. ## Social

Can anyone tell me What are some ways to support diversity during middle adulthood.

73. ## math

a fruit seller buys 100kg apple at the rate of rs 20 per /kg . He sold 40 kg at a loss of 7%.At what price should we sell the remaining apple to make a profit of 15% on the whole transaction ??

74. ## Calculus

I am maybe overthinking this, but what is the lim as n-> infinity of |(n+1)/(n+2)| ? I am trying to use the ratio test to find interval of convergence for the infiinite series (n/n+1)((-2x)^(n-1)) so i did the limit of |(n+1)/(n+2)| but i am wondering if

75. ## Math-Algebraic Expressions and identities

Use suitable identity to get product: 1) (x3 - 3/8) (x3 + 1/4) 2) (p2 + 16) (p2 - 1/4) 3) (y - 7) (y + 12) Thanks in anticipation.

76. ## HEALTH

I have to do a project on the bacteria/micro called streptococcus and s the any website that would answer these following questions about it or aleast some? What Microbe? Where Can we See This Microbe? Good or Bad Microbe? Why? How Can We Prevent Disease

77. ## literacy

It's important to include references in your research paper because references A. reduce the risk of false conclusions. B. prove that you didn't conduct your research on the Internet. C. give credit to authors. D. are required on most writing assignments.

78. ## MATH

WHAT IS THE MEAN 210153420312

79. ## Ethics and Cultural

What are some of the ways people identify groups?

80. ## calculus (vectors)

Determine a vector that is orthogonal to the vector e = [3, -1, 4]

81. ## MATH

HOW TO FACTOR 20X^2+23X-21 STEP BY STEP

82. ## maths

binary operation m.n=m2+n is associative or commutative?

84. ## Social studies

how does geography affect the development of a civilization?

85. ## Physics

Block 1 is up an incline and is attacthed to block 2 by a rope, with m2 = 5.0 kg and è = 33°.If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at

86. ## algebra

what is the vertex form of the equation y=x^2+4x-3 Could someone please explain.

87. ## geometry

The volumes of two similar figures are given. The surface area of the smaller figure is given. Find the surface area of the larger figure. V = 5 in3 V = 40 in3 S.A. = 4 in2

88. ## geometry

The volumes of two spheres are 729 in3 and 27 in3

89. ## geometry

01:34:47 The volumes of two spheres are 729 in3 and 27 in3. What is the ratio of their radii, rounded to the nearest whole number?

90. ## statistics

Suppose a shipment of 500 machine parts contains 62 defective and 438 non-defective machine parts. From the shipment you take a random sample of 25. You are interested in the number of defective machine parts out of 25 trials and corresponding

91. ## Physics

A block slides down an inclined plane that makes an angle of 23° with the horizontal. There is friction between the block and the plane. If the acceleration of the block is 2.1 m/s2, find the coefficient of kinetic friction between the block and the

92. ## math

2a + 7b + 17c = 31 How do you work out what a,b and c are?? any help would be appriciated

93. ## Physics

A bullet is fired from a rifle with a speed v0 at an angle è with respect to the horizontal axis from a cliff that is a height h above the ground below. Calculate the speed of the bullet when it strikes the ground.

94. ## Physics

A baseball is hit with an initial speed of 42 m/s at an angle of 30° relative to the x (horizontal) axis.(a) Find the speed of the ball at t = 3.4 s. (b) What angle does make with the x axis at this moment? (c) While the ball is in the air, at what value

95. ## Physics

A soccer ball is kicked with an initial speed of 23 m/s at an angle of 20° with respect to the horizontal.(a) Find the maximum height reached by the ball. (b) Find the speed of the ball when it is at the highest point on its trajectory. (c) Where does the

96. ## Physics

Consider a swimmer who wants to swim directly across a river. If the speed of the current is 0.31 m/s and the swimmer's speed relative to the water is 0.57 m/s, how long will it take her to cross a river that is 13 m wide?

97. ## Physics

Block 1 sits on a table with rope that is attached to block 2 hanging over the edge where m1 = 43 kg and m2 = 11 kg. Assume that there is no friction between m1 and the table. Find the acceleration of the crates and the tension in the string

98. ## Physics

A car of mass 1396 kg is parked on a very slippery hillside.To keep it from sliding down the hill (è = 15°), the owner attaches a cable. What is the tension in the cable?Determine the components of all the forces on the car along the coordinate axes.

99. ## physics

two objects repel each other. can we be sure they are both electrically charged? how can we know which sign of charge? two objects attract each other. can we be sure both are electrically charged?

100. ## physics

On a drive from your home to town, you wish to average 39.6 mph. The distance from your home to town is 108 miles. However, at 54 miles (half way), you find you have averaged only 29.7 mph. What average speed must you maintain in the remaining distance in

101. ## physics

to prevent dust and soot particles from polluting the atmosphere, industry often employs static electric charge in their smokestacks. explain the physics principle involved in this application

102. ## government

In gov't what does ommittee reforms that have taken power away from chairs represent?

103. ## Calculus

Use any calculus method to determine extrema, intervals where the function is increasing or decreasing, asymptotes,and points of inflection for y = -x^4 + 2x^3 - x + 2

104. ## French

Je m'appelle Claire LeFèvre et j'habite en Californie. Mes parents travaillent dans une industrie privée à San Diego et j'aime habiter ici. Le temps est parfait. Il fait toujours beau temps! Ici, à San Diego, je peux parler français et espagnol parce

105. ## Calculus

Sketch the graph of f(x)=x^2/x-2. Identify the domain, x-intercepts, y intercepts, symmetry, periodicity, asymptotes, increasing and decreasing intervals, local max/min, concavity, inflexion points.

106. ## physics

You and a friend each drive 63 km to the same destination. You travel at 88.7 km/h and your friend at 96 km/h. How long will your friend wait for you at the end of the trip? Answer in units of min

107. ## calculus!

Use differentials to approximate the maximum error propagated when calculating the volume of a sphere, if the radius is 5 + or - .01 meters

108. ## math

christi rides her bicycle 7 blocks south. 3 blocks east, 5 blocks north, and 8 blocks west. how many blocks has she ridden when she crosses her own path

109. ## Calculus

Use Newton's Method to approximate the positive root of the function f(x) = (x^5) - 20 Show each iteration until successive iterations agree to six decimal places.

110. ## Calculus -- HELP!

If 1200 square centimeters of material is available to make a box with a square base and open top, find the largest possible volume of the box.

111. ## math

what is 67 in m overn form were m and n are integers

112. ## govt

what do they mean by highly specialized committee structure

113. ## CALCULUS

A cone shaped paper drinking cup is to be made from a circular piece of paper of radius 3 inches by cutting out a sector of the circle and gluing the straight edges together. Find the angle of the cut that gives the cup with the largest capacity.

114. ## Math (Trig)

In 1893, the city of Chicago put on a World's Fair to celebrate the 400th anniversary of Columbus' trip to the Americas. The most spectacular at this fair was a huge Ferris Week built by an engineer named George Ferris. This remarkable structure had a

115. ## Calculus.......plz help! =)

Use any calculus method to determine extrema, intervals where the function is increasing or decreasing, asymptotes, and points of inflection for y = -x(x+1)^3

116. ## math

4,195.43 1,408 625.00 + 239.00 i got 6,466.43 am i right

117. ## math

Cassandra has a square photo that has lengths of 4 inches. She cuts 5/8 inch off the top and 1/2 inch off the bottom. What is the new height of the photo?

118. ## chem need help

The most prominent line in the atomic spectrum of mercury occurs at a wavelength of 253.652 nm. What is the energy of 0.625 moles of photons associated with the most prominent line? Express answer in kJ. ANS: 295 kJ Please explain.. Thank you so much!

119. ## physics

A 33.6-kg crate rests on a horizontal floor, and a 64.7-kg person is standing on the crate. Determine the magnitude of the normal force that (a) the floor exerts on the crate and (b) the crate exerts on the person.

120. ## Calculus

Suppose f and g are inverses, and (1,5) is a point on the graph of f. If f'(1) = -3, what, if anything, does that tell us about g'(1).

121. ## Algebra

3/4 ÷ x = 1/3 solve for x

122. ## Science (Human Anatomy)

THIS QUESTION IS WORTH 50 MARKS I NEED SOURCES AS WELL Give 2 different reasons why two muscles that act across the same side of the same joint are not necessarily redundant? Explain your reasons in detail and give at one real example that illustrates each

123. ## Science (Human Anatomy)

THIS QUESTION IS WORTH 50 MARKS I NEED SOURCES AS WELL Relate their structure of a neuron to the anatomy of the cerebral cortex and spinal cord Be sure to discuss the locations of soma, axons, dendrites, and supportive cells in each area.

124. ## Algebra

2x/3 + 1/4= x/6 - 1/2 solve for x

125. ## English

How does Dante feel about the journey he’s about to take with Virgil? worse than before he talked with Virgil better now that he’s talked with Virgil unsure excited

126. ## English

The speaker in the poem from Auden’s “The Ten Songs” is trying to flee from? police. Hitler. memories. floods.

127. ## math

minimize p= 15x +18y subject to x+2y= 36 x>=0 y>=0

128. ## math

machines A &B. Model A machines each cost \$200 to make at a profit of \$25 each. Model B cost \$3oo to make at a \$40 profit. Total number of machines do not exceed 2500 a month. Company has no more \$600,000 per month for manufacturing cost. Whats the number

129. ## math

Suppose a computer virus begins by infecting 8 computers in the first hour it is released. Each hour after that, each newly infected computer causes 8 more computers to become infected. The function y = 8 (exponent x) models this situation. make a table

130. ## Abnormal Psychology

The most common underlying feature associated with reading disorders is A. associating new words with those in memory. B. visually processing the shapes of letters. C. interpreting the meaning of words. D. distinguishing or separating sounds in spoken

131. ## Algebra

The length of a rectangular banner is 3 feet longer than its width. If the area is 70 square feet, find the dimensions.

132. ## Chemistry

What effect would a sweaty person have on the pool chemistry? Would the reaction tend to be forced to the right or to the left? Any help is greatly appreciated!

133. ## College Algebra

The half-life of a radioactive material is about 34.6 years. How much of a 1-gram sample of the material is left after 30 years?

134. ## Physics

The model airplane in figure below is flying at a speed of 21 m/s on a horizontal circle of radius 18 m. The mass of the plane is 0.82 kg. The person holding the guideline pulls it in until the radius becomes 11 m. The plane speeds up, and the tension in

135. ## Physics

A semitrailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway-truck ramp that is inclined at an angle of 10.0° above the horizontal. The semitrailer coasts to a stop after traveling 137 m along the ramp.

136. ## Algebra

2-(3x-4)=2x-9 X=? help would be lovely 😊

137. ## Chemistry

Given 1.01 g of H2 in the reaction H2 + 1/2 O2 = H2O. The Delta H for solution is 143 kJ. What is the delta H for the reaction?

138. ## Chemistry

Use principles of atomic structure to Explain why in aqueous solution, (a) potassium forms 1+ but not a 2+ ion (a) Ti3+ is colored but Sc3+ is not. (b) Ti2+ is a reducing agent but Ca2+ is not.

139. ## English

Does defining human worth based on shallow measurements, such as wealth and possessions, make true love and humanity impossible? Who/what is to blame for this definition? Is it possible to transcend shallow measurements? Explain.

140. ## Math

solve log(7x-3)+2log(5)=2+log(x+3) I've attempted to do this question and I ended up with log(7-3)+log(5^2)-log(x+3)=2 but I don't what to do next or whether I did something wrong.

141. ## Pre-Calculus

Applications of Logarithms I really need help with this log stuff please. If the PH of acetic acid is 5, what is the PH of hydrochloric acid if it is 200 times more acidic? the formula is right here: P=P0*10^PH2-PH1 200=10^5-PH1 log200=(5-PH1)log10 And I

142. ## Abnormal Psychology

Joint social attention refers to the ability to A. communicate with two people at the same time. B. coordinate one’s focus of attention on another person and an object of mutual interest. C. hold a conversation on two different topics. D. pay attention

143. ## calculus

For the function y = 9x2 + 6x + 2, at the point x = 7, find the following. (a) the slope of the tangent to the curve (b) the instantaneous rate of change of the function

144. ## chemistry

When 1662 J of heat energy is added to 45.9 g of hexane, C6H14, the temperature increases by 16.0 °C. Calculate the molar heat capacity of C6H14.

145. ## math

distance from A-B is 40 km.Mandy starts from A at 11 am and Jason starts from B at 1 pm.He walks at 5 km/h and gets to A at the same time as Mandy gets to B.How fast did Mandy walk?

146. ## math

distance of 12 km was walked at a speed of 4 km/h on the way, and 6 km/h on the way back.What was the average speed?

147. ## math

how many perfect squares between 1 and 100 end in 2 ?

148. ## Abnormal Psychology

Which of the following interventions would be least likely to be used with a child with a learning disorder? A. Implementation of behavioral reinforcement B. Prescribing of medications that help learning C. Teaching the child to monitor his or her own

149. ## math

how many axes of symmetry has a square?

150. ## math

in a division sum dividing by 8 ,any remainder must be(a) more than 8,(b) half of 8,(c)less than 8,(d)equal to 8

151. ## math

new south wales has 1900 km of coastline.this is 10600 km less than western australia,but 100 km greater than victoria.south australia has about twice as much coastline as new south wales,but less than western australia.the northern territory has 6200 km

what does it mean when they ask you "what parts of the book stood out"?

when hugo was 9 years old he was 56 inches tall. hugo is now 12 years old and he is 62 inches tall. fins the percent of increase in hugos height to the nearest tenth a customer earned 3262.50 interest on a 9-month cd. how much was the opening deposit total

asked by rawr... im a dinosaur.... rawr
154. ## algebra

Solve the equation for y. 8y + 7X = -21

155. ## Math

Solve the equation. x^2-5x+5=0.

156. ## Chemistry

Suppose that a stable element with atomic number 119, symbol Wr, has been discovered. (a) Write the ground-state electron configuration for Wr, showing only the valence-shell electrons. (b) Would Wr be a metal or a nonmetal? Explain in terms of electron

157. ## History

Hi for my school work I have to say out of which three colonies experienced more freedom in the seventeenth century which is hard for me to explain. The three colonies being New England,Dutch and Virginia/maryland If anyone can help thank you

158. ## Discreet Mathematics

Part I: Suppose you are developing a statistical database in which information about professional football teams and records are stored. Consider the following 2 sets of data that list football teams and quarterbacks: D = {Jets, Giants, Cowboys, 49’ers,

159. ## chemistry

What can cause high pressure inside a reactor?