# Questions Asked onMarch 22, 2011

1. ## Physics

At the top of a pole vault, an athlete actually can do work pushing on the pole before releasing it. Suppose the pushing force that the pole exerts back on the athlete is given by F(x)= (150 N/m)x - (180N/m^2)x^2 acting over a distance of 0.20 .

2. ## physics

Catching a wave, a 77-kg surfer starts with a speed of 1.1 m/s, drops through a height of 1.60 m, and ends with a speed of 8.5 m/s. How much nonconservative work was done on the surfer?

3. ## chemistry

If I use 0.524g of Mg to react with 60.0mL of 1.0M H+. The density of H+ is 1.00 g/mL, and the specific heat capacity equals what water's is. The Final and Initial temp. are 65.8 and 22. Mg(s) + 2H+(aq) ----> Mg2+(aq) + H2(g) so to find the deltaH of this

4. ## chemistry

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide: NH4I(s) ↔ NH3(g) + HI(g) At 400ºC, Kp = 0.215. If 150 g of ammonium iodide is placed into a 3.00-L vessel and heated to 400ºC, calculate the partial pressure of ammonia when

5. ## chemestry

write a chemical equation for an atom losing a third electron. would the ionization energy for this reaction be larger or smaller that the ionization energy for the lloss of the first or second electron? explain

6. ## science-chem- theory questions

please, help me.. i think i know the answers, but i just want to make sure! i'd love your feed back :) 1) an air bubble is trapped in the tip of a buret before a titration. during the titration, the bubble is passed from the buret tip. will the reported

7. ## science

When 90 kJ is removed from a 2-kg copper bar its temperature drops from 200 degrees celcius to 85 degrees celcius what is the specific heat of the iron?

8. ## math

What is the height of a triangle whose base is 9.4 centimeters and whose area is 132.54 square centimeters?

9. ## physic

You are given two waves, a transverse wave that moves to the right f1(x) and a transverse wave that moves to the left f2(x), on a string. As the problem begins, the wave f1(x) is moving to the right at v1 = +1 m/s and the wave f2(x) is moving to the left

10. ## Chemistry

Identify the salt that is produced from the acid-base neutralization reaction be- tween sodium hydroxide and hydrocyanic acid (HCN). 1. sodium cyanide 2. sodium acetate 3. sodium amide 4. sodium formate

11. ## Chemistry

If a thermometer is miscalibrated to read 1.0 degrees Celsius higher than the actual temperature over its entire scale, will the reported molar mass of the solute be: a. Too high b. Too low c. The same? The same... There will be no affect?

12. ## Finance

The average cost for a vacation is \$1,050. If a family borrows money for the vacation at an interest rate of 11.9% for 6 months,what is the total cost of the vacation including the interest on the loan?

13. ## science

A grasshopper floating in water generates waves at a rate of three per second with a wavelength of two centimeters. (a) What is the period of these waves in seconds? (b) What is the wave velocity in m/s?

14. ## human resources

WHAT ECONOMIC, SOCIAL, and POLITICAL FORCES HAVE MADE EMPLOYEE TRAINING EVEN MORE IMPORTANT TODAY THAN IT HAS BEEN IN THE PAST.

15. ## chemistry

a 275mL sample of vapor in equilibrium with 1-propylamine at 25C is removed and dissolved in 0.500L of H20. For 1-propalamine, Kb=3.72*10^-4 and the vapor pressure at 25C is 215 torr. (a)What should be the pH of the aqueous solution? (b) How many mg of

16. ## Chemistry

If the cyclohexane is initially contaminated with a soluble non-reactive, non-volatile substance, will the change in freezing point, delta Tf, be a. Higher b. Lower c. The same as the uncontaminated cyclohexane? There will be no change hence delta Tf will

17. ## Chemistry

In the reaction between H2O2 and I-, 15 mL of 0.30M KI, 65. mL of 0.10M H2O2 and 19 mL of 0.020M Na2S2O3 were mixed in a flask containing starch and buffer and the total volume was made up to 500mL with distilled water. The solution turned blue (indicating

18. ## science

would a screen be useful for separating a mixture of gravel and diatomaceous-earth powder?

19. ## Chemistry

A sample of 6.41 grams of NaOH is dissolved into 675 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.28 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the

20. ## Physics

At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without friction, and descends through a vertical height of 2.41 m, what is her speed at the bottom of the slide?

21. ## Math

A ship in calm seas steamed 13 km in one direction, turned and steamed 13 km in another direction, and then returned 12 km back to its original position. The captain then plotted the ship’s course on a nautical chart. She asked her first officer to look

22. ## Physics

A cannon of mass 200kg, fires a cannonball with a mass of 10kg. The cannon ball leaves the barrel of the cannon with a velocity of 60 m/s. Using the law of conservation of momentum , explain what happens to the cannon when the cannon ball is fired. (Answer

23. ## algebra

a diver springs from the edge of a cliff 80 ft above the ocean with an initial upward velocity of 8 ft/ s. How long will it take the diver to reach the water?

24. ## physics

11.0 g of aluminum at 200C and 20.0 g of copper are dropped into 54.0 of ethyl alcohol at 15C. The temperature quickly comes to 25.0. What was the initial temperature of the copper?

25. ## Geometry

The surface areas of two similar figures are given. The volume of the largwe figure is given. Find the volume of the smaller figure if the SA= 25 cm SA= 36cm and the V= 216cm?

26. ## AP Chemistry

what is the pH of a solution that is 0.060 M in potassium propionate and 0.085 M in propioic acid

27. ## Spanish

Which is the correct substitute for the underlined words? Hablamos de los príncipes.( los príncipes is underlined). A)éstas B)éstos C)están D)éstan El duque ama a la duquesa. ( la duquesa is underlined) A)esta B)estás C)ésta D)está is it b and C ?

28. ## chemistry

how much heat is required to completely vapporize 2.3 grams of ice starting at -50 degrees Celsius? (the specific heat of ice is 2.0 J/g.C; the specific heat of water is 4.184 J/g.C; the heat of fusion is 333 J/g; and the heat of vaporization is 22601 J/g)

29. ## physics

A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?

30. ## Math

Rewrite the expression in terms of the first power of cosine sin^4(x)

31. ## Math

A coin is tossed 13 times. How many different outcomes have at least 2 heads ?

32. ## physics

When you push a 1.55 kg book resting on a tabletop it takes 2.10 N to start the book sliding. Once it is sliding, however, it takes only 1.50 N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction between

33. ## ECON

A pure monopolist sells output for \$4.00 per unit at the current level of production. At this level of output, the marginal cost is \$3.00, average variable costs are \$3.75, and average total costs are \$4.25. The marginal revenue is \$3.00. What is the

34. ## chemistry

the largest a party balloon can get before bursting is 8.23L at 25 degrees celsius and 1.00 atm. supposing you fill the balloon only with oxygen gas, how many grams of oxygen can be added to the balloon before it pops? assume you have not added any gas to

35. ## chemistry

determine the mass of CO2 produced when 76.8g of CaO is reacted with 50.0 g of C acording to the unbalanced equation... CaO + C ==> CaC2 CO2 after i balanced the equation i got 2CaO +5C ==> 2CaC2 +CO2

36. ## physics

what is the angle between the first order and the second order bright fringes for a yellow light with a wave length of 605 nm, and a distance between two slits of 0.0550 mm?

37. ## Chemistry

When sodium chloride reacts with silver nitrate, silver chloride precipitates. What mass of AgCl is produced from 192 g of AgNO3? Answer in units of g.

38. ## physics

a 650 newton crate rests on the floor. how much work is required to move it at a constant speed, 3 meters against a friction force of 150 Newtons

I had to make up a conversation between two people ordering in a restaurant-Is this correct? Emily ¿Qué tú deseas comer? Beth: Yo quisiera el puerco con papas y zanahorias. Emily: ¿Y qué tú quieres beber? Beth: Yo quisiera agua para tomar. ¿Y qué

40. ## chemistry

the solubility of BaF2 is 6.29x10^-3M and the solubility of barium fluoride in 0.15M NaF is 4.4x10^-5M. Compare the solubility and explain?

41. ## algebra

Suppose that these 15 measurements are respectively labeled x1,x2,..,x15. (Thus,-27 is labeled x1,62 is labeled x2,and so on.) Find. 15 over the sum sign and i=1 under the sum sign(x1 + 43) I ahve no idea how to solve this becaue I never seen this type of

42. ## Chemistry

In the reaction Ca(H2O)+2 6 + H2O ! Ca(H2O)5(OH)+ + H3O+ the calcium compound on the left acts accord- ing to the Bronsted-Lowry theory as 1. a base. 2. an acid. 3. a salt. 4. a solvent.

43. ## physics

A 54.0 kg person takes a nap in a (lightweight) backyard hammock. Both ropes supporting the hammock are at an angle of 16.9° above the horizontal. Find the tension in the ropes.

44. ## Pre Calc

from the top of a 250 ft lighthouse the angle of depression to a ship in the ocean is 18 degrees. how far is the ship from the base of the light house?

45. ## statistics

Data shows that 88% of the people in a certain population are right-handed. A group of 7 people from this population are selected at random. (a) What would be the expected value for the number of right-handed people in the group? (b) What is the

46. ## Physics

A 4.5 object moving in two dimensions initially has a velocity = (11.5 i+ 22.0j). A net force then acts on the object for 2.0 s, after which the object's velocity is = (14.5i + 31.5j).

47. ## statistics

an average of 0.56 defects per 500 yards. Using the Poisson formula, find the probability that the number of defects in a given 500-yard piece of this fabric will be more than 3

48. ## Chemistry

a.) 2KClO3 (s)-------> 2KCl(s) + 3O2(g) b.) 4NH3(g) +6NO(g) ---------> 5N2 (g) +6H2O(g) c.) 4K(s) + O2(g) ------> 2K2O(s)

49. ## Math

An airplane can travel 380 miles into the wind in the same time that it can travel 420 miles with the wind. If the wind speed is 10 miles per hour, find the speed of the airplane without any wind. Is this correct: 380(x-10)=420(x+10) 380x-3800=420x+4200

or the period 1990-2003, the amount of biscuits, pastas, and noodles y (in thousands of metric tons)imported into the united states ca be modeled by the function y=1.36(xsquared)+ 27.8x+304 where x is the number of year since 1990. a.write and solve an

51. ## Physics

The temperature of your skin is approximately 35C degrees. What is the wavelength at which the peak occurs in the radiation emitted from your skin?

52. ## Chemistry

What volume would be occupied by 100 g of oxygen gas at a pressure of 1.50 atm and a temp of 25 degrees C.

53. ## Chemistry

How many moles of oxygen atoms are contained in 1.86 x 10-2 mol CuSO4·5H2O

54. ## english

Need help with Transitive and Intransitive verbs. 1. It is related to wheat, oats, and barley. 2. Their size might surpise you. 3. Some reach a height of 120 feet. 4. The stms measure a foot in diameter. 5. The Japanese also make flutes from these stems.

55. ## chem

reposted again a 275mL sample of vapor in equilibrium with 1-propylamine at 25C is removed and dissolved in 0.500L of H20. For 1-propalamine, Kb=3.72*10^-4 and the vapor pressure at 25C is 215 torr. (a)What should be the pH of the aqueous solution? (b) How

56. ## Math

the numbers M and N are different numbers selected from the first 25 counting numbers: If M is larger than N, what is the smallest value that M * N over M-N could have?

57. ## science

a train goes forward at a speed of 1m/s for 20 seconds. Then it stops abd goes backward at a speed od 0.5 m/s for 4 seconds. After both movements are completed, how far is the train located from its starting point.(note: we are asking for the train's final

58. ## Physics

A photon of energy E strikes an electron at rest undergoes pair production, producing a positive electron(positron) and an electron, photon+electron produce positron+electron+electron The two electrons and the positron move off with identical momenta in

59. ## marketing

The owner of a small hardware store-the only one in a medium –sized town in the mountains-has just learned that a large home improvement chain plans to open a new store nearby. How difficulty will it be for the owner to plan for this new competitive

60. ## physics

A backpack full of books weighing 43.0 N rests on a table in a physics laboratory classroom. A spring with a force constant of 150 N/m is attached to the backpack and pulled horizontally, as indicated in the figure. If the spring stretches by 2.30 cm, what

61. ## Trigonometry

Write the expression as a trigonometric function of one number. (cos 20 degrees)(cos 70 degrees)+(sin 20 degrees)(sin 70 degrees)

62. ## chemistry

If 100 grams of a saturated solution of lead nitrate is cooled from 60c to 20c, what will happen

63. ## Spanish

Conjugate the following irregular verbs in the simple present tense (Indicative).? >> are my answers correct. tener (to have) yo >> tengo tener (to have) nosotros >> tenemos venir (to come) tu >> vienes venir (to come) nosotros >> venimos salir (to leave)

64. ## Physics

Pushing on the pump of a soap dispenser compresses a small spring. When the spring is compressed 0.55 cm, its potential energy is 0.0035 J. What is the force constant of the spring? What compression is required for the spring potential energy to equal

65. ## Physics

X-rays with an energy of 300 keV undergo Compton scattering from a target. If the scattered x-ray are directed at 30 degrees relative to the incident rays, find a)The Compton shift at this angle b) The energy of the scattered x-ray c)The energy of the

66. ## English

A couple more questions on Transitive and Intransitive verbs. 1. Zoo keepers harvest bamboo for pandas. 2. Asian farmers live in bamboo houses. 3. Their sandals are made from bamboo strips. 4. People sometimes sleep on bamboo mats. 1. Trans 2. intrans 3.

67. ## Discrete Math

Use mathematical induction to establish the following formula. n Σ i² / [(2i-1)(2i+1)] = n(n+1) / 2(2n+1) i=1 Thanks for any helpful replies :)

68. ## math

Stuck on this one: find the slope of the line passing through each pair of points or stat that the slope is undefined. assume that all variables represent positive real numbers. then indicate whether the line through the points rises, falls, is horizontal

69. ## chem

a 275mL sample of vapor in equilibrium with 1-propylamine at 25C is removed and dissolved in 0.500L of H20. For 1-propalamine, Kb=3.72*10^-4 and the vapor pressure at 25C is 215 torr. (a)What should be the pH of the aqueous solution? (b) How many mg of

70. ## Math

The grocery store employs 35 cashiers and grocery baggers altogether. There are 5 cashiers for every 2 grocery baggers. How many of each are employed?

71. ## physology

Match the following organs with one of its functions. 1. Oral cavity ______ a. stores bile 2. Pharynx ______ b. begins mechanical breakdown of food 3. Esophagus ______ c. responsible for 90% of all nutrient absorption 4. Stomach ______ d. compacts food

72. ## Math

Is this right? Choose an appropriate metric unit of mass or capacity. A telephone-kilograms A single piece of paper-grams Lake Erie-kiloliters a bucket of water-liters

There are three walls in Jordan’s living room. The three walls, shown here, are 12 feet, 9 feet and 10 feet wide, respectively. Each wall has a height of 8 feet with a 6-inch baseboard along the bottom. The largest of the three walls contains a window

74. ## AP Chem

A student performs an experiment to determine the enthalpy of neutralization of hydrochloric acid and sodium hydroxide. The student combines 25 mL of equimolar solutions of acid and base, both having an initial temperature of 22.5 C, in an open polystyrene

75. ## MATH

THREE PAINTINGS ARE SHAPED LIKE AN 8 FOOT SQUARE A 7 FOOT BY 4 FOOT RECTANGLE AND A TRIANGLE AND A TRIANGLE WITH A 6 FOOT BASE AND A HEIGHT OF 7 FEET IF THOSE PAINTING ARE HUNG TOGETHER ON THE OUTSIDE OF THE BUILDING, HOW MUCH OF THE BUILDING WALL WILL

76. ## calculus

sum (n*2^n)/(2^n +3^n) [n to infinity] conv or div ? and how to get that? thank you!

77. ## Math

Find how many terms has an a.p whose common diffrence and first term are respectively negetive 6 and 8 and the last term is 82.

78. ## math

The table below shows the drink preferences for people in 3 different age groups. If one of the 255 subjects is randomly chosen, what is the probability that the person prefers orange juice, given they are over 40? Round your answer to 3 decimal places.

79. ## Chemistry - Le Chatelier's principle(help)

Le Chatelier's principle states that " a dynamic equilibrium tends to respond as to relieve the effect of any change in the conditions that affect the equilibrium." I understand the above, now i am trying to predict the response of the system and i am

80. ## science

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 1.25 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

81. ## chemistry

given reaction at equilibrium, if Kp=1.05 at 250 degree celcius, then kc =

82. ## Physics

(a) Determine the amount of work (in joules) that must be done on a 95 kg payload to elevate it to a height of 1007 km above the Earth's surface. ANSWER in MJ (b) Determine the amount of additional work that is required to put the payload into circular

Three point charges, 5.6E-6, 2.2E-6, and -3.0E-6, lie along the x-axis at 0.00 m, 0.031 m, and 0.059 m. What is the force exerted on q1 by the other two charges? What is the force exerted on q2 by the other forces? And what is the force exerted on q3 by

84. ## statistics

Kim and Susan are playing a tennis match where the winner must win 2 sets in order to win the match. For each set, the probability that Kim wins the set is 0.53. The probability of Kim winning the set is not affected by who has won any previous sets. What

85. ## financial management

You have been hired by first citizens bank as a financial analyst. One of your first assignments is to analyze the present financial condition of Bradley Stores, Incorporated. You are provided with the following 2009 balance sheet and income statement

86. ## physics

A hollow, thin-shelled ball of mass rolls along a horizontal surface with a translational speed of .

87. ## chemistry

Aluminum has a specific heat capacity of 0.903J/g degree celsius. What mass of aluminum in g would require 500j of heat to raise its temperature by 12.5 degrees celsius

88. ## algebra

the current in a stream moves at a speed of 2 mph. A boat travels 8mi upstream and 8mi downstream in a total time of 7 hr. What is the speed of the boat in still water

89. ## Physics

A cylindrical copper cable carries a current of 1070 A. There is a potential difference of 1.6 10-2 V between two points on the cable that are 0.22 m apart. What is the radius of the cable?

90. ## Finance

Calculate the accounts receivable period, accounts payable period, inventory period, and cash conversion cycle for the following firm: Income statement data: Sales 5,000 Cost of goods sold 4,200 Balance Sheet Data: Beginning of Year End of Year Inventory

91. ## statistics

Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula for transforming a raw

92. ## Math

#4. 1. the mystery shape has at least 2 congruent sides. 2. it has fewer than 2 obtuse angles. 3. it has more than 1 line of symmetry. 4. it has at least 1 acute angle. A. equilateral triangle B. trapezoid C. square D. lsosceles right triangle E.

93. ## geometry

The perimeter of the rectangle is 19 inches. The perimeter of the inscribed triangle is also 19 inches. What is the width of the rectangle? What is the lengths of the rectangle? sides of isosceles triangle = leng of rectangle + 2 base = width of rectangle

94. ## trig

Evaluate each value as a trigonometric function of an angle in Quadrant 1. #1 cos (27pi/8)

95. ## Physics

The linear absorption coefficient for 0.05 nm x-rays in lead and in iron are respectively, 5.8x10(4) /m and 1.1x10 (4) /m. How thick should an iron shield be in order to provide the same protection from these x-rays as 10 nm of lead?

96. ## Algebra

I'm probably letting the layout of this problem confuse me but I need help. I need to multiply and express in simplest form: (x-5/2)^3*(1/x-5)^2

97. ## mathematics

a cyclist bikes over a path at 10 miles per hour. he returns over the same path at * miles per hour. what was his average speed for the round trip.((please explain how to do this)

98. ## Physics

X-radiation from a molybdenum target (0.626 A) is incident on a crystal with adjacent atomic planes spaced 4.00x10(-10) m apart. Find three smallest angles at which intensity maxima occur in the diffracted beam?

99. ## math

Suppose that 30% of a company's television sets are manufactured at a plant in Portland and 70% at a plant in Houston. Of those made in Portland, 3% are defective, and of those made in Houston 9% are defective. If you buy a defective set from the company,

100. ## American History

Which president passed the Workers Compensation law, and what was it about? The presidents we can choose from are McKinley, Roosevelt, Taft, and Wilson. Thanks!

101. ## Spanish-SraJMcGin -please check corrections

I reposted this as a new question because I wasn't sure if you go back a page or not- Emily ¿Qué deseas tú comer? Beth: Yo quisiera el puerco con papas y zanahorias. Emily: ¿Y qué quieres tú beber? Beth: Yo quisiera agua para tomar. ¿Y qué deseas

102. ## English

Swimming Strokes by Lee Carroll Paragraph 2: When most people think of swimming, they think of the crawl stroke. It involves flutter kicking with your legs as you pull yourself through the water with your arms while alternating your breathing from side to

103. ## chemestry

how is ionizaion energy different from electron affinity? use a chemical equation to clarify your definition.

104. ## Geomatry

John’s backyard is shaped like a rectangle as shown below. The entire yard is grass, except for a 60 foot by 30 foot rectangular swimming pool. NA What is the area of the yard that is grass?

How do I solve this problem: At Carver Elementary, there are 355 students altogether. The School has 25 more female students than males. How many males and females does Carver have?

106. ## penn foster

which suffix means pertaining to conditions present at birth

107. ## Mathmatics

The number of t teaspoons in b tablespoons can be found by using the equation b=t/3 . Find the number of tablespoons needed for a recipe that calls for 8 1/2 teaspoons of sugar.

108. ## algebra 2

A. consider the finite arithmetic series 10+13+16+...+31. how many terms are in it? Explain. B. evaluate the series

Which of the following would be the LEAST appropriate in the closing paragraph of a negative message? a. "Let us know if model A01 would be a suitable substitution." b. "Our layaway plan will enable you to purchase all the clothes the children need for

110. ## Newton's 3rd Law

How can I use Newton's 3rd law on a diver off of a diving board? Could I calculate friction against his feet?

111. ## English

In paragraph 3 of Swimming Strokes by Lee Carroll, I found 3 errors in subject-verb agreement and 3 errors in parallelism. Are these answers correct because all the errors in the passage range from 0 errors to 3 errors and nothing higher than 3 errors in

112. ## Physical Science

In a certain reaction 1.5 mol of CO and 1.5 mol of H2O are placed in a 2,0 dm3 sealed vessel. Equilibrium is established at a temperature of 1 000 C. The equilibrium reaction equation is CO(g) + H2O(g) = CO2(g) + H2(g) The value of Kc for this reaction is

113. ## HiSTORY ....helpppppp

One unintended consequence of the immigration restrictions passed in the 1920s was to: A. end legal immigration from east Asia. B. decrease the number of immigrants from southern and eastern Europe. C. increase the number and proportion of immigrants from

Does the meaning of written communication change if it is the form of an e-mail, a letter, or a memo? Why or why not? i say yes, but cannot elaborate, can you help?

115. ## trig

Prove that sin squared 20 degrees+sin squared 40 degrees+ sin squared 80 degrees is equal to 3/2

116. ## marketing

Courtney, a sales manager, and her team of six have been assigned the task of developing a marketing strategy for a new software product developed by her company. A couple of team members propose a business plan centered on a good price that would make the

117. ## Chemistry

Calculate the OH− concentration after 51.3 mL of the 0.100 M KOH has been added to 25.0 mL of 0.200 M HBr. Assume additive volumes. Answer in units of M.

118. ## history

The joint-stock company, in which individuals invested and profited in proportion to the number of shares purchased, was the principal instrument of England's overseas expansion. True False [] Question #6 [] TrueFalse [][]Note to teacher: Note from

119. ## geometry

The radius R of a sphere is 5.6cm. Calculate the sphere's surface area A. Use the value 3.14, and round your answer to the nearest tenth.

120. ## Physics

Gamma rays of photon energy 0.511 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there.a) What is the wavelength of the incident gamma rays? b) What is the wavelength of the gamma rays scattered

121. ## Physics

What provides the centripetal force : i)on the elctron orbiting the proton in a hydrogen atom ii)satellite orbiting the planet iii)on the child being whirled round in a chair on the end of a chain in the fairground ride ? Ayuada por favorr :)

122. ## physics

A car moves 26km due east then 14km due north. It then turns along a path running north east with 15 km,then 17 km due west.If the time for the journey is 2 hrs,find the average velocity?

123. ## science

the half life of tritium is 12.5 years. How much of a 1 g sample will remain after 25 years

124. ## Chemistry

I'm not quite sure what i'm doing wrong here: The Ksp for Ga(OH)3 = 7.28 X 10-36. What is the molar solubility of Ga(OH)3 in a 3.80M solution of gallium sulfate?

125. ## English

In paragraph 4 in Swimming Strokes by Lee Carroll, I found 2 errors in subject-verb agreement, 1 error in parallelism, and 2 errors in pronoun-antecedent agreement. Are these answers correct because the errors in this passage range from 0 errors to 3

126. ## Chemistry

How do i determine the exact molarity of .2 M of HCL? The molarity of NaOH Used was .2010M used in the titration. And the volume used 10.33 mL used to reach equivalence point. What would be the Molarity of HCL?

127. ## Algebra

Can someone help me factor this problem? Generally I wouldn't have a problem doing it, but today we're supposed to factor problems without knowing what exactly to do, (Trinomial squares, difference of squares, magic diamond, etc), and it's really stumping

128. ## Chemistry

In an experiment we did in class ethanol was poured into a test tube and we noticed that the ethanol did not collect and form a dome at the opening of the tube in the same way that water had. I know why water collected at the opening, but i'm not sure why

129. ## Spanish

Answer the following questions what does pre viernes el pescado o el bonyo mean what does que co mis parlemis i duno mean? what does pre viernes la liche o el hugo mean in spanish? what does que te gusta comer parde e la guarso mean? I know some of these

130. ## MATH

Erik Johnson has just become a heir to \$15 000. He's 23 years old, and hes graduated frm university business program. He works as an assistant managager of retail store. He lives with his friend in a two bedroom apartment. He saves 5% of his monthly

131. ## English

In paragraph 2 of Swimming Strokes by Lee Carroll, I found 1 error in subject-verb agreement, 0 errors in parallelism, and 1 error in pronoun-antecedent agreement. I was wondering were they correct because all the errors in the passage range from 0 errors

Determine the concentration of a calcium chloride solution if 1.75 L of the solution contains 0.125 mol of calcium chloride.

133. ## programming 2

Write a program that inputs a word representing a binary number (0s and 1s). First, your program should verify that it is indeed a binary number, that is, the number contains only 0s and 1s. if that is not the case, your program should print a message that

134. ## math

One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take the 2 pumps, working together, to empty the pool?

I am a mom trying to help my child with their math HW. But this question has us stumped. I've seen it posted before but no real explanation was offered. Please provide EXPLANATION, not just answers. Q: Make up a list of data with the following landmarks:

136. ## Chemistry

Describe how to prepare an aqueous 100 mL stock solution of 2 M sodium chloride solution.

137. ## English

Swimming Strokes by Lee Carroll Paragraph 2: When most people think of swimming, they think of the crawl stroke. It involves flutter kicking with your legs as you pull yourself through the water with your arms while alternating your breathing from side to

138. ## Physics

In a performance test, each of two cars takes 9.4 s to accelerate from rest to 24 m/s. Car A has a mass of 1358 kg, and car B has a mass of 2014 kg. Find the net average force that acts on (a) car A and (b) car B during the test.

Your client has asked you to prepare a report in which you address the following questions: Is the CEO trying to lead or manage this change initiative? What arguments can he use to persuade his managers?

140. ## chemistry

500.0 g of ammonia react with 51.0 moles of sulfuric acid to produce ammonium sulfate. How many moles of excess sulfuric acid are left over after the reaction is complete? 2 NH3 (aq) + H2SO4(aq) → (NH4)2SO4 (aq)

141. ## chemistry

what is the mass of a single oxygen autom

142. ## chemistry

A sample of benzoic acid weighting 1.567 g was burned in a calorimeter. If the initial temperature was 22 degrees Celsius,the final temperature was 31.1 degrees celsius, and the heat capacity of the calorimeter was 4.88 kJ/ degrees Celsius, what is the

143. ## Mathematical Methods

Following completion of your readings, complete exercises 35 and 37 in the “Real World Applications” section on page 230 of Mathematics in Our World. For each exercise, specify whether it involves an arithmetic sequence or a geometric sequence and use

144. ## PHYSICS

Exerting a force of 94 N on the circular piston of a syringe causes a pressure increase in the barrel of 1.3 atm. What is the diameter of the piston?

145. ## English

So in paragraph 4 in Swimming Strokes are there 2 errors in subject-verb agreement, 1 error in parallelism, and 2 errors in pronoun agreement?

146. ## Math

Can anyone help me solve a Math Olympiad Fraction problem?

147. ## English - Native speakers

Hello! I am trying to figure out one of the most difficult thing in English - articles. So I have one question: Do we say I'm leaving home (Would people know that home means the place where we live?) Or is it correct I'm leaving the home? I personally

148. ## HiSTORY ....helpppppp

Which of the following strategies did the NAACP employ to secure civil rights for A. Urging African Americans to vote for Democrats in return for support of civil rights legislation in Congressfrican Americans in the 1920s? B. Efforts to gain entrance to

149. ## HiSTORY ....helpppppp

The Ku Klux Klan of the postwar period differed from its original Reconstruction-era incarnation in all of the following ways except: A. it had a broad base of support outside the South. B. it tried to influence politics. C. it achieved most of its goals.

150. ## english

what is an verb adverb, action verb and how to use in a sentence

151. ## CYU

what is the monthly payment on a loan of 250,000 with 6% interest that compounds monthly for 30 years how much will be owed in 5 yrs how much will be owed in 10 years

152. ## English

Swimming Strokes by Lee Carroll Paragraph 3: The second type of stroke-the breast stroke-is my favorite, since it feels the most natural. Here the kick became very important. In the past, the frog kick was popular, but today this had been largely

153. ## World Geography

What is western europe economy like? What has water done to effect the economy?

154. ## AP Chemistry

what are the procedures and materials needed to make a 0.10m solution of Silver(I) Chloride?

155. ## English

Swimming Strokes by Lee Carroll Paragraph 3: The second type of stroke-the breast stroke-is my favorite, since it feels the most natural. Here the kick became very important. In the past, the frog kick was popular, but today this had been largely

156. ## Math

if I have sin(6x)+cos(6x)how would I write it in terms of sin only?

157. ## chemistry

How many grams of water are present in 0.500 moles of calcium sulfate hemihydrate?

158. ## english

i need help with getting some help with these question on my english homework im looking for immediate & underlying cause for being selected candidates for a position please

159. ## chemistry

for an exotherimic reaction incresing the reaction temperature results in a (n)___k ?

160. ## physics

A bullet is fired straight up from a gun with a muzzle velocity of 170 m/s. Neglecting air resistance, what will be its displacement after 5.8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m.

161. ## physics

A 0.46 kg object connected to a light spring with a spring constant of 18.0 N/m oscillates on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest. (a) Determine the maximum speed of the mass. unit = cm/s (b) Determine

162. ## Chem

An ethylene glycol solution contains 20.9 g of ethylene glycol (C2H6O2) in 85.0 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.) freezing point °C boiling point °C How would I set this

163. ## math

Name the shape. Plane shapes. It does not have 4 sides. all of it sides are equal. All of its angles are acute.

164. ## HiSTORY ....helpppppp

The most prominent advocate of "Negro nationalism" during the early twentieth century wwas A. Claude McKay B. Alice Paul C. Zora Neale Hurston D. W.E.B. Du Bois E. Marcus Garveyas

165. ## math

I Need Help On My Math Evaluates: Okay So I Have This Quiz Im Taking And Its Telling Me " Evaluate 3-1/3 to the power of 4" I Am A Little Rusty On My Math So Can Someone Please Help! :) Thanks.. Adrienne Deleon

166. ## Algebra I

A sample of radioactive material weighing 45 grams has a decay rate of 4.25% each day. The equation y = 45(2.7)–0.0425t can be used to find the amount of material that still remains, where t is the number of days that have passed. Approximately what is

167. ## Geography

Which produces more sugar beets, Ukraine or Russia?

168. ## literature

summarize the major similarities and differences between the forms of drama, poetry, and the short story. Demonstrate your ideas with textual examples from the course readings. In your response, include at least one example of each literary form.

169. ## English

Swimming Strokes by Lee Carroll Paragraph 4: One of the easiest strokes for people who are just learning to swim are the backstroke because the swimmer does not put their faces in the water. Your nose and mouth stay above the water, and they can breathe

170. ## Calc. Help ASAP please

the tuition at a college increases exponentially. the current tuition (let it be t=0) is 36,000 and in 2 years it will be 39,690. a) find a formula to predict the cost of tuition in t years. Is this right? And I'm stuck at the end. 39,690= 36,000e^(kt)

171. ## calculus

Find f^-1(13), f(x)= 2x^5 + 3x^3 + 8x and find D(f^-1(x)) at x=13. Is this correct... I got 1/27 ??

172. ## 8th gr. Transition Math

A rotation id described by it's ____ and ____?

173. ## Chemistry

A stressed chemistry student is hyperventilating into a paper bag. The student stops to wipe his brow after a few breaths, and the bag is at 5.7 KPa and the temperature in the lecture hall is 24 °C. The bag is 0.75L full. The student then goes at it

174. ## physics

At what distance (in m) from a 3.8 mC charge is the electric potential equal to 32 V? (k = 9 x 109 Nm2/C2)

175. ## APUSH

I need help understanding this FRQ prompt: Analyze the circumstances around the decision to ultimately relocate persons of Japanese ancestry. The "analyze the circumstances" part really confuses me! Thank you!

176. ## Math

what is the lowest common multiple for 3, 5 and 6?

177. ## Fin 324

Using the following data, compute net sales sales discounts 50,000 Accounts receivable, ending 125,000 Gross Sales 2,500,000 Inventory, ending 200,000 sales returns and allowances 75,000

178. ## Chemistry

In this exercise, you need to spike 0.5 L of river water with 1,000 g/L of phosphate. Starting from a stock solution containing 1,000 mg/L of phosphate, calculate and explain in detail how exactly you will conduct this spiking experiment

179. ## geometry

what are part owners in a corporation

180. ## math

john can paint 2 square feet of fence in 10 min.How long will it take him to paint a fence that is 6 feet high by 25 feet long?

181. ## Calculus

Determine where the function is concave upward and where it is concave downward. g(x)=-x(^2)+4x+8

182. ## English

Swimming Strokes by Lee Carroll Paragraph 1: There is three types of strokes you must master if you want to be a proficient swimmer: the crawl stroke, the breast stroke, and the backstroke. These three strokes will help you deal with almost all the

183. ## microeconomics

Michelle has 200lbs of potatoes and 50 cchickens. James has 80lbs of potatoes and 40 chickens. what is Michelles opportunity cost of producing potatoes and opportunity cost of producing chickens? Same for James. Which person has an abosolte advantage in

184. ## finance

Find the future value of the ordinary annuity with payout of \$20,000 at 4.5% interest compounded annually for 12 years.

185. ## English

In paragraph 1 in Swimming strokes I found 2 errors in subject-verb agreement, 1 error in parallelism, and 0 errors in pronoun-antecedent agreement. I was wondering were they correct because all the errors in this passage range from 0 errors to 3 errors

186. ## Science

Why are ethers good aprotic solvents?

187. ## MATH

the numbers below are Fibonacci numbers. 1,1,2,3,5,8,13,21,34,55,... write a rule for the pattern. what are the next three numbers?

188. ## math

2sin^2x+3sinx+1

189. ## math

what is the answers to the following: 2x to the second power-3ab+27

190. ## Math

rewrite the expression in terms of the first power of cosine. cos^3(x)sin^4(x)

191. ## A&P

Give 2 specific examlples of an organic molecule. I think 2 of them are carbohydrates and proteins.

192. ## Physics

Find the approximate gravitational red shift in 500 nm light emitted by a compact star whose mass is that of sun but whose radius is 10 km.

193. ## spanish-college

Can you please check my essay? Heres the prompt: En el capítulo 4 del libro, encontrarás un texto sobre los estereotipos culturales. Piensa en cuáles son los estereotipos más frecuentes sobre los Estados Unidos. Escribe una composición acerca de los

What is the answer if you have a nail NOT a FINGERNAIL butt A NAIL? What is the nearest cm and what is the neartest mm

195. ## algebra

Determine whether each binomial is the difference of two square. If so, factor it. If not, explain why. -m^6

196. ## College Physics II

An electric field of 2.04 kV/m and a magnetic field of 0.548 T act on a moving electron to produce no net force. If the fields are perpendicular to each other, what is the electron's speed?

197. ## trig

Rewrite as a function of a quadrant 1 angle. cos152

198. ## English

Can you please check these questions, please? Thank you very much in advance 1) I had to do the cleaning twice a day. 2) It took me one hour to get to Turin. 3) For my next holidays I’m going to Sicily with my parents. 4) He was reading a book when the

199. ## American Government

What are some of the criticism of a democratic style of government ? ...

200. ## algebra

Determine whether each binomial is the difference of two square. If so, factor it. If not, explain why. -m^6

201. ## English

Which one is correct? He changes by learning to read. He changes by learning how to read.

I have an electrical circuit which has 20V shown on left side I=0.8A on top I = 0.3A on bottom I have to find the resistance Would I add 0.8 + 0.3 and then use the formula V = IR so it would look like this: 20V = 1.1A x R 20V x 1.1A = R

203. ## Social Studies

Describe and define the types of government that the different city-states chose for themselves. I mean about Crete- Or minoans

204. ## Chemistry

A stressed chemistry student is hyperventilating into a paper bag. The student stops to wipe his brow after a few breaths, and the bag is at 5.7 KPa and the temperature in the lecture hall is 24 °C. The bag is 0.75L full. The student then goes at it

205. ## English

Can you check these sentences for me, please? Thank you very much. 1)He proposes he should pay for the racer himself. 2)She spent pleasing days in Sicily. 3) She has very pleasing manners. 4) What age do you have to be to drive a car in Spain? 5) Tell your

206. ## math help

A 125-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 25 ft longer that the height that it reaches on the side of the bridge. Find the horizontal and

207. ## financial management

Which of the two procurement strategies is most effective for a human service agency? Explain your reasoning. •

208. ## AP Chemistry

what is the procedure and materials needed to make a 0.10m solution of Potassium Hydroxide?

209. ## Honors Chemistry

A sample of CO2(g) at 305mmHg goes from 13 degress celsius to 25 degress celsius. What is the new pressure?

210. ## Chemisty

What is the electron dot structure of Ethanol?

211. ## physics

A bullet is fired straight up from a gun with a muzzle velocity of 170 m/s. Neglecting air resistance, what will be its displacement after 5.8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m.

212. ## bibb

Consider a rider on a Ferris wheel which is turning at constant speed. (a) At what point is the upward component of the force of the seat on the rider minimum? (b) At what point is the upward component of the force of the seat on the rider maximum? Justify

213. ## Math

We need some help with these questions that we posted earlier. Please. What is the meaning of a relative frequency of 1? A rotation is described by it's ____ and ____? Thank you very much.

214. ## math

1/6 students like math, 2/3 like reading and 12 like science. How many students were asked.

215. ## math

What are some examples of samples?

216. ## Algebra II

Can someone please help me with this problem. Given Matrix Y= 2 -7 4 and -1 1 0 Matrix Z= 3 4 1 4 2 -4 Solve for matrix X. X-2Y=3X+Z HELP PLEASE!!!

217. ## algebra

how do you solve for y in the equation -1/y=-0.25x^2-3.5

218. ## Modern Algebra

Let F be a field and let f(x), g(x), h(x), and d(x) be polynomials in F[x]. Prove that if d(x)=gcd(f(x),g(x)) and both f(x) and g(x) divide h(x), then f(x)g(x) divides h(x)d(x).

219. ## Calculus

Find the inflection point(s), if any, of the function. g(x)= 4x(^3)-4x

220. ## Mathematics

Draw a line 5cm long divide it in the ratio 7:3 measure the longer part

221. ## MATH

I need help on this question plz The mean of Five numbers is 28. Two of the numbers are the same. If three of the numbers are 20,25, and 35,what are the other two numbers? plz write back asap thanks

222. ## Material Science

1).Does more grain boundaries result in a higher ultimate tensile strength? 2).Does an increase in stiffness of a material result in a higher modulus?

223. ## Psychology

Antipsychotic drugs can increase the positive symptoms of schizophrenia.

224. ## HCR/220

HCR 220 week 6 Applying Level II HCPCS Modifiers can anyone help with this Portable home oxygen unit Emergency ambulance transport and extended life support Non-electric wheelchair Intravenous catheter line Laboratory certification, cytology specimens

225. ## marketing

can you help me please to differentitae this follows... 1.synthetic vs. fabricating process what does it mean please i need your help

226. ## PHYSICS

A BOAT IS LYING AT ANCHOR.IT RISES UP EVERY 15SECONDS AS WAVES PASS UNDER IT.IF THE DISTANCE BETWEEN PEAKS IS 3M,HOW LONG AFTER THE FIRST SWELL HAS PASSED UNDER THE BOAT WILL IT PASS UNDER ANOTHER BOAT LYING 150M DIRECTLY AWAY FROM IT

227. ## geography

whose political borders do pakistan and india disagree about

228. ## algebra

how do you solve for y in the equation 1/y=-0.5x^(-2)-0.5

229. ## science

when an ice skater wants to slow down or stop, she drags the jagged front of her skate blade along the ice. What force is increased to slow the skater down? a. gravity b. friction c. pressure d. kinetic

230. ## Math

Two of these statements are false. Identify them. 1.4x12>3x15 2.96/231+13

231. ## maths

Hi Looking for some guidance please, I need to find the initial-value problem for dy/dx = 1+2cos^2x / y. y = 1 when x = 0. any help is much appricated regards CLAIRE

232. ## english

How does the GOP feel about Tom Corbett decision to cut education funding for schools in Pennsylvania?

233. ## Math

how do you solve: 5x=2/3

234. ## math

find the sum estimate to cheack if the answer is reasonable

235. ## english

what is an outcast story

236. ## long division

how do you do it

237. ## Trig

(2/y+2)+(3/y)=(-y/y+2)

238. ## measurments

how long is a five k????? Is it 5 kilometers or 5 miles??

239. ## algebra

how do you solve for y in the equation 1/y=(1/3)x^3-(253/12)

240. ## Trig

Solve: (2/y+2)+(3/y)=(-y/y+2)

241. ## earth

How many minutes does it take for light from the sun to reach the earth?

242. ## 7th gr. Algebra

what is the meaning of a relative frequency of 1?

243. ## Furthermaths

(3x+2)^3(3x^2-1)^2 pls i need good explanation its important

244. ## history

besides being a war for independence why else was the american revolution violent?

245. ## math

How do I find the slope of the line tangent to the graph of each function at the given points? y=x^2+2x-8

246. ## english

is experimenting a subject or predict nominative

247. ## science

does the stars in a galaxy slowly rotate around a center.