Questions Asked on
December 20, 2012

  1. AP CHEMISTRY HELP

    a) A student fails to wash the weighing paper when transferring the KHP sample into the beaker. What effect does this error have on the calculated molarity of the NAOH solution? Mathematically justify your answer. b) A student failed to notice an air

    asked by Amber
  2. maths

    sita and gita start walking from the same point on the road but in opposite directions.if sita walks at the speed of 5km/h and gita @ a speed of 4km/h,in how much time will they be 27km apart

    asked by Anonymous
  3. Physics

    A placekicker kicks a football at an angle of 60°. At what angle will the football hit the ground.

    asked by Aman
  4. geometry

    ^ RST m

    asked by Sarah Atchley
  5. Math *URGENT

    Please give the answers and solutions for each. 1.If the second term is 2 and the seventh term of a geometric sequence is 64, find the 12th term. 2. Which term if the geometric sequence 18,54,162,486,... is 3,188,646? 3. Determine the geometric mean of 8

    asked by Aliza
  6. Calculus

    A swimming pool is 60ft long by 25ft wide. Its depth varies uniformly from 3ft at the shallow end to 15ft at the deep end. The pool is being filled with water at a rate of 800ft3/min. There is 5ft of water at the deep end. What is the equation for finding

    asked by Lost
  7. Physics...Help!!!

    given that Earth's surface gravitaitional field strength has a magnitude of 9.80N/kg, determine the distance(as a multiple of Earth's radius re) above the Earth's surface at which the magnitude of the field strength is 3.20N/kg.

    asked by Grace
  8. physics

    Before a collision, a 24 kg object is moving at +13 m/s. Find the impulse that acted on the object if, after the collision, it moved at the following velocities. (a) +8.0 m/s (b) -8.0 m/s

    asked by Anonymous,
  9. Physics

    4) A 10 cm cylinder chamber has a 5cm diameter piston attached to one end. The piston is connected to an ideal spring with a spring constant of 10N/cm. Initially the spring is not compressed but is latched in place so that it cannot move. The cylinder is

    asked by P Vijay Kumar
  10. Business Math

    Jim Company bought a machine for $36,000with an estimated lofe of 5 years. The residual value of the machine is $6,000 Calculate (a) the annual depreciation and (b) the book value at the end of year 3. Assume straight-line depreciation

    asked by Jean
  11. Chemistry

    30 grams of a metal at 100 degrees Celsius is placed in a calorimeter containing 100 mL of water at 21 degrees Celsius. After a few minutes, the temperature inside the calorimeter is 24 degrees Celsius. What is the specific heat of the metal?

    asked by Syeph
  12. physics

    A piano is being moved into a concert hall up a 15m ramp that has a final height of 1.5m. To help with the weight, a rope has been tied between the piano and a counterweight through two pulleys. One at the top of the ramp and the other off the edge of the

    asked by christine
  13. Physics

    A student librarian picks up a 2.2 kg book from the floor to a height of 1.05 m. He carries the book 8.3 m to the stacks and places the book on a shelf that is 0.35 m above the floor. How much work does he do on the book?

    asked by Chicago Bulls
  14. Chemistry

    30 grams of a metal at 100 degrees Celsius is placed in a calorimeter containing 100 mL of water at 21 degrees Celsius. After a few minutes, the temperature inside the calorimeter is 24 degrees Celsius. What is the specific heat of the metal?

    asked by Seyph
  15. physics

    The force required to stretch a Hooke’s-law spring varies from 0 N to 68.1 N as we stretch the spring by moving one end 16.2 cm from its unstressed position. Find the work done in stretching the spring

    asked by james
  16. Physics

    A lawn roller is pushed across a lawn by a force of 103 N along the direction of the handle, which is 22.5° above the horizontal. If 63.0 W of power is developed for 90.0 s, what distance is the roller pushed?

    asked by Chicago Bulls
  17. Biostatistic

    An enzymatic method for determining alcohol in wine is evaluated by comparison with a gas-chromatography (GC) method. the same sample is analyzed several times by both methods with the following results (% ethanol). Enzymatic method: 13.1, 12.7, 12.6,

    asked by Jam
  18. Physics

    The gravitational force between two asteroids 1200 km apart is 8400 N. Find the following changes in gravity (do not write units) a) What is the force between them if the distance is 600 km?

    asked by Alex
  19. Business Math

    Jim Clinnin purchased a used RV with 19,000 miles for $46,000. Originally the RV sold for $70,000 with a residual value of $20,000. After subtracting the residual value, depreciation allowance per mile was $.86. How much was Jim's purchase price over or

    asked by Jean
  20. Physics

    Use Kepler's Laws and data about the Moon to determine the orbital period (hours) of a satellite that is 17512 km above the SURFACE of the Earth. HINT: How does the radius of the Earth affect the problem?

    asked by Alex
  21. maths --plse help me..

    The diameter of a roller is 80 cm and its length is 126 cm. It takes 750 complete revolution once over to level a playground. find the area of the ground.

    asked by Anonymous
  22. math

    An escalator moves down at the rate of 60 steps per minute. Alan can walk fast up ordinary steps at the rate of 80 steps per minute. There are 50 steps from one level to another. Alan decides to walk fast up the down escalator. How long will it take him to

    asked by Bob
  23. robinswood

    the area of a square tetherball court is 260 ft2. what is the approximate length of each side of the court? find answer th the nearest foot? i really have a hard time with these word problem...please help me

    asked by frankie
  24. mechanical science

    10. A car is moving in a straight line starts from rest, accelerates uniformly at 12 m/s2 for the first 5s, then travels at uniform speed for the next 2s and finally decelerates uniformly at 4 m/s2 for the next 5s. Draw the acceleration-time graph,

    asked by anshuman kumar
  25. History

    Why was the Fordney-McCumber Tariff of 1922 a BAD thing for the U.S. Economy? There seems to so many and I would like to know the most important ones.

    asked by Mark
  26. Business Math

    From the following facts, complete a depreciation schedule using thee straight - line cost of Highlander- $30,000 residual value- $6,000 estimated life- 8 years

    asked by Jean
  27. Physics

    A small spaceship whose mass is 1.5x10^3 kg (include-ing an astronaut) is drifting in outer space with negligible gravitational forces acting on it. If the astronaut turns on a 10 kW laser beam, what speed will the ship attain in 1.0 day because of the

    asked by Brian
  28. physics

    2. A ball is thrown vertically upward from the 15m level in an elevator shaft with an initial velocity of 20 m/s. At the same instant an open-platform elevator passes the 6m level, moving upward with a constant velocity of 2 m/s. Determine a. When and

    asked by anshuman kumar
  29. English

    Can someone please read over my essay and take note of any errors or suggested revisions? Thanks. The title of Lorraine Hansberry’s A Raisin in the Sun represents the dreams of the characters in the play and how they become crushed. At the beginning of

    asked by Anonymous
  30. math

    Each time the same letter appears it represents the same digit.Different letters represent different digits.C+C=D;D+E=17;A+2C=D;2B+C=8.Find the sum A+B+C+D+E

    asked by bob
  31. math

    what is 98,605 divided by 75

    asked by Afl
  32. mechanical science

    11. In an accident a freeway sports car made skid marks 200 m long along the pavement. The police estimated the braking acceleration of the car to be – 0.8g under the road conditions prevailing. Determine the speed of the sports car when the brakes were

    asked by anshuman kumar
  33. Physics

    A(n) 563 kg elevator starts from rest. It moves upward for 3.18 s with a constant acceleration until it reaches its cruising speed of 1.96 m/s. The acceleration of gravity is 9.8 m/s 2 . Find the average power delivered by the elevator motor during this

    asked by Nick
  34. physics

    a mass of 5 kg descending vertically,draws up a mass of 3 kg by means of a light string passing over a pully.at the end of 4 s,the string.how much higher the 3 kg mass would go?

    asked by pallishree
  35. Pre-Algebra

    5h – 9 = –16 + 6h Answer Choices: 4 –7 7 10 I need a step-by-step response cause I'm having a hard time understanding.

    asked by Somebody
  36. world history

    completed the restoration of a central Japanese authority a. Kabuki b. banners d. The Dream of the Red Chamber f. Yi h. Zheng He i. ronin j. Tokugawa I think its h but that's kinda just a hunch.

    asked by BaileyBubble
  37. robinswood

    estimate the square root of 154 to the nearest hundredth

    asked by frankie
  38. accounting

    using the following information, calculate inventory turnover ratio, the average days in inventory, and the gross profit ratio for Howard Company for the year ended december 31, 2011( round to two decimal places) sales $225,00 Cost of goods $175,000 Ending

    asked by Karen
  39. Math

    Multiply or divide. Write the answer in simplest form. Type your answer as a number. 2 1/4 • 2 2/3

    asked by Anonymous
  40. R&slotto pool

    What are the possible numbers to play for todays club master lotto pool

    asked by David
  41. math

    find the circumference of the circle if the square has anarea of 144m^2

    asked by savage
  42. Physics

    If the coefficient of kinetic friction between a 36 kg crate and the floor is 0.31, what horizontal force is required to move the crate at a constant velocity (so that FNET=0.0 N) across the floor?

    asked by Jennifer
  43. PHYSICS

    An electron gun is a device that sets up an electric field between two plates. The electrons start on the negative plate and thenare accelerated toward the positive plate and out a small hole in its middle if an electron in the gun feels the effect of

    asked by lulu
  44. Physics

    A hunter game in the woods keeps. Track of his movements from his car he travels 1/2 mile down a trail into the woods that leads directly north east. From there he bushwacks 3500 paces directly north before stopping for a drink. As he is putting his flask

    asked by kat
  45. Physics

    A 5.4 kg soccer ball moving to the right at 5.6 m/s collides with a 7.6 kg basketball moving to the left at 3.8 m/s. The soccer ball bounces left at 6.5 m/s after the collision. What is the speed of the basketball after the collision?

    asked by Sandra
  46. math urgent

    Solve the inequality. 8. c + 6 < –20 (1 point) c < –26 c < –14 c < 26 c < 14 9. ≥ –3 (1 point) d ≥ –16 d ≥ 39 d ≥ 10 d ≥ –39 10. –3p > –48 (1 point) p < 16 p > –51 p < –16 p > 16

    asked by Anonymous
  47. Physics

    Kang and Kodos orbit the Earth in a spaceship 20,000 km above Springfield.the period of their orbit (hours) is 11.8 and findthe speed (m/s) their spacecraft travels. b) Speed of spacecraft in meters per second m/s .

    asked by Alex
  48. Physics

    A ball with a mass of 5.8 kg is moving to the right at 10.3 m/s and collides with a stationary ball of mass 10.9 kg. After the collision, the 5.8 kg ball moves to the right, but at an angle of 20° below the horizontal, at a speed of 4.3 m/s. Find the

    asked by Shawn
  49. maths --plse help me..

    20% of boys in an exmaination were not appeared,70% of appeared boys passed the examination.What percentage of total registered boys for the exmaination were failed.If absent boys are considered as failed

    asked by Anonymous
  50. science

    A scientist collects a sample of carbon dioxide that contains 25 moles of CO2. In grams, what is the mass of the sample?

    asked by cristiano
  51. economics.Help!!!

    How the technical rate of substitution and marginal product are relates and what is their difference?

    asked by cat02
  52. physics

    A 2561-kg van runs into the back of a 823-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.

    asked by Anonymous,
  53. math

    If the recipe for 4 pancakes is 6tbsp flour and 1/4 pint milk how much milk and flour would you use for 1/4, 1/2, 2, 5, and 3 pancakes?

    asked by Annette
  54. Biostatistic

    The following replicate calcium determinations on a blood sample using atomic absorption spectrophotometry (AAS) and a new colorimetric method were reported. Is there a significant difference in the precision of the two methods?

    asked by Jam
  55. social studies

    briefly describe the important events of the cultures's past for new england usa

    asked by naomi
  56. math plz help!

    Multiply or divide. Write the answer in simplest form. Type the fraction or mixed number like the following example: 1 1/2 7/8 ÷ 2

    asked by BobbaBobba
  57. math

    The principal of Valley Elementary School wants to divide each of the three fourth-grade classes into small same-size groups with at least 2 students in each. If the classes have 18, 24, and 36 students, respectively, what size groups are possible?

    asked by zac
  58. science

    Can we measure temperature of 45 degrees celcius using clinical thermometre ?

    asked by Yumna Moomin
  59. physics

    2 runners accelerate from rest to their top speeds. The 1st runner pat has an acceleration of 5.9 m/s^2 and reaches her top speed in 4 sec. The second runner steven accelerates at 4.4m/s^2 and takes 6.5 sec to reach his top speed the 2 runners run flat out

    asked by ty
  60. math

    How do I approach this problem? Seven green marbles and three red marbles are randomly placed in Box A and in Box B. Box A holds 4 marbles, while Box B holds 6. What is the probability that Box A has at least 2 green marbles?

    asked by Anonymous
  61. Physics

    Kang and Kodos orbit the Earth in a spaceship 20,000 km above Springfield.the period of their orbit (hours) is 11.8 and findthe speed (m/s) their spacecraft travels. b) Speed of spacecraft in meters per second m/s .

    asked by Alex
  62. Physics

    We want to rotate the direction of polarization of a beam of polarized light through 90 degrees by sending the beam through one or more polarizing sheets. (a) What is the mini-mum number of sheets required? (b) What is the minimum number of sheets required

    asked by Brian
  63. physics

    a mass of 5 kg descending vertically,draws up a mass of 3 kg by means of a light string passing over a pully.at the end of 4 s,the string.how much higher the 3 kg mass would go?

    asked by pallishree
  64. maths --plse help me..

    Prove that the radius of the base of right circular cylinder of greatest curved surface area which can be inscribed in a given cone is half that of the cone

    asked by Anamika
  65. Algebra CTU

    What is the unpaid balance of the business loan of 50,000 with interest rate of 9% compounded monthly for7 years, after the firt year of payments?

    asked by Vicki
  66. World history- does this sound okay?

    if you had to give queen Elizabeth the first a grade on the enlightenment principles what grade would you give and why? I think I would give her a B bc for the most part she was a very big influence on the enlightenment era and she enabled quite a bit for

    asked by BaileyBubble
  67. physics

    A 0.201-kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.105 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction.

    asked by Anonymous,
  68. math i don't get it

    If you have a 3 cup container and a 5 cup container, how can you measure exactly 1 cup.

    asked by Anonymous
  69. Physic 115

    A 5 kg block is placed on an inclined plane raised to angle theta with the horizontal when it just started to slip down. If coefficient of friction is 0.3, calculate theta and the speed of the block up the plane if it being pull up by a force of 30 newton

    asked by Yahaya
  70. Business Math

    Assume you lease a $45,000 BMW. Using a straight- line method with a 3- year ueful life and is a $16, 675 residual value, what is the book value of the BMW after the first year?

    asked by Jean
  71. math-calculus

    The following equation shows the approximate relationship between the percentage y of total personal consumption spent on food and the corresponding percentage x spent on education. y = 38/x^0.38 percentage points; (6.5 ≤ x ≤ 17.5). According to the

    asked by Trisha
  72. AP Chem

    I had to do an experiment to calculate the enthalpy of solution of Epsom salts. I'm stuck on how to calculate the amount of the reactant in moles. Here's some preliminary data: 37.58 g of Epsom salts in the solution Molar mass of solution: 246.48 g/mol I'm

    asked by Arianna
  73. Physics

    A 2.3 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.65 m/s. The incline is 1.6 m long. What is the coefficient of friction?

    asked by Mat
  74. algebra 1

    please help. Write a linear equation in slope-intercept from to model the situation. A telephone company charges $28.75 per mont plus .10 cent a minute for long distance calls

    asked by kyle
  75. Chemistry

    The relationship between ionization energies as evidence for electron configuration for elements?

    asked by Maria
  76. SOCIALS 9 URGENT

    answer in proper paragraph of 10-12 sentences What was the system of government called that was in place before the revolution? describe who were involved. Give some examples of what their occupations were. which types of people were for this type of

    asked by SPIKE
  77. Math

    1 3/8 • 6/11. Multiply or divide. Write the answer in simplest form. Type the fraction or mixed number like the following example: 1 1/2

    asked by MathNOOB
  78. physics

    what will happen to the bone structure if earth becomes more dense than its actual density?

    asked by g
  79. Precalc

    1. Solve log (4x) = log (2) + log (x-1) the fact that this is x-1 and not + is really messing me up because i keep getting a negative number and that isnt possible 2. Solve: absolut value of(x^2 -4x-4) = 8 thanks so much!!! I have been studying and my

    asked by Rebekah
  80. algebra 2

    The label on a prescription bottle directs the patient to take the medicine twice a day. The effective ingredient of the medicine decreases continuously at a rate of 25% per hour. If a dose of medicine containing 1 milligram of the effective ingredient is

    asked by Dee
  81. TO MS SUE

    oops i fogot to say that it was the french revolution not the american one ... sorry that was my fault. CAN U STILL HELP ME :)

    asked by SPIKE
  82. physics 11

    By how much would 1200 W kettle, which is 72% efficient raise the temperature of 0.60 kg of water in 3.0 min?

    asked by sim
  83. Math

    As an invesment Mrs. Astor purchased 2 paintings. She later sold the two paintings for $24,000 each. On one painting she made a 20% profit, but on the other she esperienced a 20% loss. Mrs. Astor lost__________ on her investments in the 2 paintings.

    asked by Bob
  84. eep

    9. A toy is thrown vertically downwards from the top of a building and has an initial velocity of 1.5 m/s. If the height of the building is 25 m, determine i. the velocity with which the toy hits the ground ii. the time taken for the toy to fall

    asked by anshuman kumar
  85. PHISIC help

    water waves in a ripple tank are diffracted by a narrow aperture.if the wavelength of the water waves is decreased slightly whilst keeping the aperture size the same ,which one of the following will happen? the waves will spread out more the waves will

    asked by alicya
  86. U.S History

    which action is an example of the system of checks and balances? A. Texas requires at least 180 school days per year. B. An individuals pays both state and federal income tax. C. The House of Representatives votes to expel on of its members. D. The senate

    asked by bryce
  87. MACROECONOMICS

    What is the difference between nominal amounts and real amounts? Please explain this to me.

    asked by CHASEONE
  88. maths

    let A be a nonempty set such that A *B = A *C show that B = C

    asked by Anonymous
  89. math

    what is the integers of the square root of 51

    asked by frankie
  90. Math

    3 1/3 ÷ 1 5/12 in simplest form. I do not know these at all so please help?

    asked by T.J And the Vibe
  91. SPELLING SENTENCE

    My sentence is : The women rose their voice. is rose ok or is that the wrong spelling. pleese help and thank you.

    asked by WINNIE
  92. social studies

    Where was the first Quaker colony in North America located?

    asked by Celest
  93. English - Writeacher

    Thank you so much! Because you helped me with the articles my performence in class was pretty good. I just have to train my pronunciation. So just thanks a lot.

    asked by Minnie
  94. social studies

    a map that describes the geography of new england usa

    asked by naomi
  95. Physics

    What is the frictional force between the tires of a 2000 kg car and an asphalt road if the coefficient of friction is 1.2?

    asked by Jennifer
  96. Video games, entertainment

    Is the new video game far cry 3 OK for kids?

    asked by Anonymous
  97. math

    if 15 percent of 220 students chose going shopping out of the 220 percent students chose s how many chose go shopping. my answer is 33 am i correct

    asked by Americal
  98. College Algebra

    I have t = ln(2)/.04 and the book has the answer as 25ln(2) I know these are the same but please show me the steps to go from ln(20)/.04 to 25ln(2) What rules etc. make it so I can do that so I can do it on later problems Thank you

    asked by Linda
  99. Physics

    What is the frictional force between the tires of a 2000 kg car and an asphalt road if the coefficient of friction is 1.2?

    asked by Jennifer
  100. math

    a bag has 57 blue and green marbles. there are 13 more blue marbles than green marbles. How many blue and green marbles are in the bag

    asked by cole
  101. Physics

    How many times further from the Sun than the Earth is an asteroid with an average orbital period of 7.43 years? (HINT: Let the distance to the Earth be R=1 AU)

    asked by Alex
  102. Algebra 2

    How do i get the perfect square of: 3x^2+7x=-9

    asked by Jo
  103. math

    Finf the volume of the solid generated by revolving the region bounded by the curve. x=2/(y+1), x=0, y=0, y=3, about y-axis. My ans is pie unit^3. Is it correct? if wrong can i know the right calculation.

    asked by ifi
  104. Statistics Help!

    1. What does a stepwise regression analysis do? 2. What tests are used for longitudinal studies with 1 or more dependent variables?

    asked by Anonymous
  105. science

    why is using phenophthalin in determination of acetic acid in vinegar.

    asked by Anonymous
  106. maths help plz!

    e=√d/ab make d the subject ,do not include the bracket .thanks

    asked by john
  107. math

    please show work divide 1/2 divided by1/8 need to see steps thanks

    asked by shawnee
  108. physics

    how to know the raiuds in GMm/r2?

    asked by g
  109. Math

    The length of each side of an equilateral hexagon is a whole number, and the length of each side of an equilateral octagon is a whole number. Both have the same perimeter. The perimeter must be a multiple of 16 ,18, 24,30 or 36 ?

    asked by Mary
  110. math

    Estimate each amount. 1. 81% of 60 2.48% of 97 3.20% of 490

    asked by gary
  111. science

    if the car had a mass of 2050 kg and was traveling 25 miles per second, what was the car momentum?

    asked by none ya
  112. robinswood

    between what two consecutive whole numbers does the squre root lie? 1) square root of 70 2) square root of 35 3) square root of 6 4) square root of 52

    asked by frankie
  113. Ms. Sue (History)

    The Europeans raised their own tariff which caused a trade protection war. The American merchants had enormous surpluses and no market to sell their goods. This would cause a fall in prices and industrial instability. Am I on the right track?

    asked by Mark
  114. Ms. Sue (History)

    Thanks

    asked by Mark
  115. ENGLISH URGENT !!!!!!!

    What are good things to buy for a 17 year old boy that are not that expensive???? this is really urgent for a part of my english project..... pleeeeeeeeeeeeeeeeeeeese help!!!!!!!

    asked by Jules
  116. math

    how do we find the scale factor

    asked by jamine
  117. Math

    How do I approach this problem? Seven green marbles and three red marbles are randomly placed in Box A and in Box B. Box A holds 4 marbles, while Box B holds 6. What is the probability that Box A has at least 2 green marbles?

    asked by Anonymous
  118. Science

    Is there a website where I can find more about the climate in my area?

    asked by Anonymous
  119. reading

    Finding the Culprit At 4 a.m. in New York city the busy streets were now nothing but a whistle in the sky. There was no one there but a 14-year old girl wandering around, she had a light auburn hair that reached to her mid-waist. She was a fit tall girl,

    asked by naomi
  120. intergrated topics/math

    evaluate the following expression of a=3, b=10, and c=6

    asked by alexis
  121. trig

    Find the Opposite of the right angle where the angle is 61 degrees and the Adjacent is 10 cm.?

    asked by Joel
  122. Physics

    cart A with mass: 512g (0.512kg) is on a horizontal table. the cart is connected to cart b with mass: 51.0g (0.051kg) through a string that is crossing a pulley. cart A is released from rest at 60 cm(0.60m), it passes a photogate with a velocity of

    asked by Help
  123. maths --sets

    let A be a nonempty set such that A *B = A *C show that B = C

    asked by Anonymous
  124. intergrated topics/math

    solve for x: 4x(5-6)=10(6x+2)

    asked by brittany
  125. math

    two points are (5/2,4/3),(9/2,10/3).find the equation of a line passing through them.

    asked by Mshazaib
  126. physics

    If I travel at 30.0 m/s in a straight line for 83.0 seconds how far will I travel?

    asked by jay