Questions Asked on
December 20, 2010

  1. physics help please...

    A light spring of constant k = 170 N/m rests vertically on the bottom of a large beaker of water. A 5.70 kg block of wood (density = 650 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium. What is the

    asked by julie
  2. velocity

    crystal can ride her bike 10 km in 2.1 hours, what is her average velocity?

    asked by jessica
  3. trig

    a plane flies due east for 500 km. and then turns on a heading of 120 degrees for 150 km. What are its distance and bearing from its starting point?

    asked by Anonymous
  4. english

    In what sentence is a homonym used correctly? A. If you ask me, there's hobby like fishing. B. How many ours do we have to wait? C. Karen's new dog had flees. D. We had chocolate ice cream for desert.

    asked by Meosha
  5. chemistry

    Calcium chloride, CaCl2, has been used to melt ice from roadways. Given that a solution is 25% CaCl2 by mass, estimate the freezing point.

    asked by Akkam
  6. physics

    An empty rubber balloon has a mass of 0.0100 kg. The balloon is filled with helium at a density of 0.181 kg/m3. At this density the balloon is spherical with a radius of 0.300 m. If the filled balloon is fastened to a vertical line, what is the tension in

    asked by april
  7. statistics

    The average age of a vehicle registered in the U.S. is 8 years, or 96 months. If a random sample of 36 vehicles is selected, find the probability that the mean of their age is between 98 and 100 months. Assume the standard deviation for the population is

    asked by Jana
  8. Physics

    A 0.20-kg block rests on a frictionless level surface and is attached to a horizontally aligned spring with a spring constant of 40 N/m. The block is initially displaced 4.0 cm from the equilibrium point and then released to set up a simple harmonic

    asked by Shawn
  9. physics

    A light spring of constant k = 170 N/m rests vertically on the bottom of a large beaker of water. A 5.70 kg block of wood (density = 650 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium. What is the

    asked by julie
  10. Physics

    A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.16 and the push imparts an initial speed of 4.2 m/s?

    asked by Thao
  11. science

    how does the distribution of animal tissues in an organism difer from the distribution of tissues in a plant

    asked by nick
  12. MATH

    Two polygons are congruent and the perimeter of the first polygon is 38 cm. If the sides of the second polygon are consecutive integers (x, x+1, x+2, x+3, etc.), what value of x makes the polygons into congruent quadrilaterals? Use x as the smallest side.

    asked by Anonymous
  13. physics problem

    A cannon is fired horizontally from atop a 40.0 m tower. The cannonball travels 175 m horizontally before it strikes the ground. With what velocity did the ball leave the muzzle?

    asked by marco
  14. sat essay!

    question: what are your thoughts onthe idea that television has turned out to isolate people instead of bringing them together. my essay; please evaluate! to say that television has turned out to isolate people instead of bringing them together holds true

    asked by mahwish
  15. Physics

    A 2.00-kg block of ice is at STP (0¢XC, 1 atm) while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34 „e 105 J/kg)

    asked by Shawn
  16. 7th Pre-Algebra Word Problem

    Approximately one-seventh of the people in the United States are left-handed. The population of the United States is about 300 million. Write and solve an equation to estimate howmany people in the United States are left handed.

    asked by Bob
  17. social studies

    A socialist economy is characterized by: A. an extensive reliance on markets to allocate final goods and services. B. an extensive reliance on the profit motive to govern resource allocation decisions C. elimination of the problem of scarcity since all

    asked by ciara
  18. t test

    A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small meal. After eating the meal, their hearing was tested. The hearing ability scores (high

    asked by wallic
  19. AP Physics

    A young male adult takes in about 4.0 10-4 m3 of fresh air during a normal breath. Fresh air contains approximately 21% oxygen. Assuming that the pressure in the lungs is 1.0 105 Pa and air is an ideal gas at a temperature of 310 K, find the number of

    asked by Cheyenne
  20. PHYSICS

    A cannon is fired horizontally from atop a 40.0 m tower. The cannonball travels 175 m horizontally before it strikes the ground. With what velocity did the ball leave the muzzle?

    asked by marco
  21. math

    what are two ways to skip count to find 2x 5? is 115 a multiple of 5? i also need to explain how i would know...

    asked by shy
  22. Chemistry

    Please, what is the balanced equation for Potassium Bitartrate and Sodium Bicarbonate? Is there any easy way to remove the resultant sodium compound? THANKS.

    asked by Doc
  23. Business Algebra

    Invest $23,000 in a savings account at 4.25% interest compounded quarterly. Invest into an ordinary annuity where $5,000 is deposited each year into an account that earns 6.6% interest compounded annually.

    asked by Diane
  24. 10th grade

    How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26°C?

    asked by jeremy
  25. Math

    determine whether each conjecture is true or false. Give a counterexample for any false conjecture Given: Points A and B are collinear. Conjecture: Points A and B form a line.

    asked by Cee
  26. chemistry

    What mass of water, in grams, would have to be decomposed to produce 28.7 L of molecular oxygen at STP?

    asked by Lisa
  27. economics

    When quantity supplied equals quantity demanded: A. there is disequilibrium B. the marked is cleared C. there is excess quantity demanded. D. there is excess quantity supplied I'm stuck between C and D but I think it's D?

    asked by tony
  28. math

    If 10 is removed from the set of whole numbers, is the set closed with respect to addition? Explain why or why not.

    asked by Diana
  29. Spanish

    how to write "socks of wool" - calcetines de lana OR calcetines de lanas?

    asked by Amy
  30. chemistry

    8. If x grams of S are needed to obtain 0.4 grams of SO3, how many grams of SO2 can be obtained from the same amount of S? (A) 0.32 g (B) 0.62 g (C) 0.40 g (D) 0.16 g (E) Can not be calculated from the given data. I am not sure how to set up this problem.

    asked by Anna
  31. 11th grade

    a race car travels along a raceway at a constant velocity of 200 km per hour.what horizontal force acts and what is the net force acting on the car?

    asked by Anonymous
  32. Statistics

    If the standard deviation of a population is 56 and we want the standard error (the standard deviation of the sample mean) to be 14, then we need to take how many samples?

    asked by Jana
  33. economics

    If the equilibrium price of an hour with a personal trainer is $45 and the market price is currently $55, then there is: A. a surplus of personal trainers. B. a shortage of personal trainers. C. equilibrium D. none of the above I think it's A?

    asked by tony
  34. Physics

    The period of revolution of a satellite is 90min. What is the altitude above the surface of the earth?

    asked by Elise
  35. spanish

    how we say :candy canes ,poinsettia, in spanish

    asked by joy
  36. trig

    Find the value of secant theta for angle theta in standard position if a point with coordinates (-3/4) lies on its terminal side

    asked by Mallory
  37. History WWII

    Is the Potsdam Proclamation and the Potsdam Declaration the same thing?

    asked by Amy
  38. chemistry

    The diving atmosphere used by the U.S. Navy in its undersea Sea-Lab experiments consisted of 0.036 mole fraction O2 and 0.058 mole fraction N2, with helium (He) making up the remainder. What are the masses of nitrogen, oxygen, and helium in a 7.22-g sample

    asked by Nagaa
  39. spanish

    "Mi abuela está en el hospital." "Qué lástima! ____" a. No vale la pena. b. ¿Qué te duele? c. No lo sabía. d. ¿Qué tienes? D? My teacher says A, but it doesn't make sense to me.

    asked by Lily
  40. physics

    The displacement vector for a 15.0 second interval of a jet airplane's flight is (3150, −2430) m. (a) What is the magnitude of the average velocity? (b) At what angle, measured from the positive x axis, did the airplane fly during this time interval?

    asked by calantha
  41. economics

    "The Fed should simply increase the money supply at the same rate that the full employment economy grows, and the government should desist from any stabilizing urges." What school of thought would make this suggestion, and how do economists of that school

    asked by tom
  42. Math

    a person cleared a rectangular plot of land and covered it with gravel. then he got 9 square wooden sections of side lengths: 2,5,7,9,16,25,28,33 and 36. by placing the squares on the gravel with no two overlaping, the person built a patio which exactly

    asked by John
  43. PHYSICS

    an arctic flying to antarctica encounters a storm. The term changes direction to fly around the storn. if the tern flies 46 km at 15degrees south of east , 22 km at 13 degrees east of south , and finally 14km at 14 degrees west of south what is the tern's

    asked by mike
  44. physic HELP

    On a banked race track, the smallest circular path on which cars can move has a radius r1 = 106 m, while the largest has a radius r2 = 153 m, as the drawing illustrates. The height of the outer wall is 18 m. Find the smallest speed at which cars can move

    asked by jessica
  45. Spanish

    How would you say "the knitting held together" - I can't seem to find the right verb for held

    asked by Amy
  46. Precalc

    The number N of bacteria in a culture is given by the model N=250e^kt where t is the time (in hours). If N=280 when t=10 estimate the time for the population to double in size.

    asked by L
  47. calculus

    The number N of bacteria in a culture is given by the model N=250e^kt where t is the time (in hours). If N=280 when t=10 estimate the time for the population to double in size.

    asked by L
  48. t test

    What is the power of each of the following studies,(t test chart) using a t test for dependent means (based on the .05 significance level)?

    asked by wallic
  49. physics

    a very strong young child tosses a stone into the air. his father times the stone's travel and finds that it takes the stone 2.8 seconds to return to the child's hand. how high did the stone rise?

    asked by Anonymous
  50. 12th grade chem

    why is it that only the first hydrogen bond in a polyproptic acid strong?

    asked by sam
  51. physics

    A particle with a charge 7C and a mass of 20kg is traveling in a circular path around a fixed particle of charde -5C. The velocity is observed to be 3000m/sec. A 9C particle with the same velocity is instead in the presence of a uniform electric field of

    asked by dipset
  52. Chemistry

    A solution is made up by dissolving 14.8 g Na2CO3 · 10 H2O in 110.5 g of water. What is the molality of Na2CO3 in this solution?

    asked by Jintau
  53. physics

    Sam tosses a ball horizontally off a footbridge at 3.2 m/s. How much time passes after he releases it until its speed doubles?

    asked by dan
  54. Physics

    A roller-coaster car speeds down a hill past point A where R1 = 9.8 m and then rolls up a hill past point B where R2 = 15.8 m (R1 and R2 represent the radiuses/ radii) The car has a speed of 18.6 m/s at point A. if the track exerts a normal force on the

    asked by Tori
  55. math

    what are two ways to skip count to find 2x 5? is 115 a multiple of 5? i also need to explain how i would know...

    asked by shy
  56. physics

    A 5kg ball is thrown upward with an initial speed of 30m/s. Suppose there is a constant air resistance of 25N opposing the motion during its entire up and down path. How much work was done by air resistance during the entire path up and down. Wfric= -f X

    asked by dipset
  57. chemistry

    determine the mass of phosphoric acid that can be produced by the reaction of one thousand tons of phosphate rock and sulfuric acid

    asked by Sue
  58. Physics

    A high diver of mass 52 kg jumps off a board 11 m above the water. If, 4.7 s after entering the water his downward motion is stopped, what average upward force did the water exert?

    asked by Anonymous
  59. trig

    Find the value of secant theta for angle theta in standard position if a point with coordinates (-3/4) lies on its terminal side

    asked by Mallory
  60. economics PLEASE HELP

    According to the permanent hypothesis, households will tend to react to a temporary tax cut by: A. assuming the new tax level will be permanent. B. saving most of the additional disposable income. C. increasing consumption sharply in response to the higher

    asked by tony
  61. physics

    a 8 kg ball is thrown upward with an initial speed of 20 m/s. suppose there is a constant air resistance of 30N opposing the motion during it entire up and down path. what is the acceleration on the way up and on the way down?

    asked by sacrifice
  62. science

    the history of tfe atom

    asked by the history of the atom
  63. Goemetry

    Two parallel lines are cut by a transversal. Angles M and P are alternate interior angles. Angle M measures (10x + 50)° and angle P measures (12x + 30)°. What is the measure of angle M?

    asked by Marquise
  64. physics

    Two sinusoidal waves of the same frequency travel in the same direction along a string. If ym1 = 4.2 cm, ym2 = 5.9 cm, ö1 = 0, and ö2 = /5 rad, what is the amplitude (in cm) of the resultant wave?

    asked by mounir
  65. Physics

    Given that electricity is priced at constant 13.5 pence per kWh and central heating oil (kerosine) varies in price between 39 pence and 137 pence per litre. What price does kerosine need to be to make heating domestic hot water cheaper using an immersion

    asked by Mike
  66. allied health

    Suppose the legislature of Pennsylvania adopts a new law. This type of law is called a/an A. bill. B. code. C. statute. D. ordiance. I think it is C. but with what I had read it maybe A. I am stuck with these two help what is the difference?

    asked by Benn
  67. English

    Can you check these sentences for me, please? Thank you. 1) I had a terrible pain in my tooth. I went to the dentist and he told me my molar was decayed (or I had a decayed tooth and it needed filling?) 2) The filling has come out of my tooth. 3) You use a

    asked by Franco
  68. methods of sbtracting mixed fractions

    Hello, I need did a subtraction problem with mixed numbers by converting the LCD of the denominator. However, when I went to Algebra.help they did the problem by converting the mixed problem to an improper fraction and then worked it that way. However, I

    asked by Suzanne
  69. AP Physics

    The surface of the sun has a temperature of about 6.0 103 K. This hot gas contains hydrogen atoms (m = 1.67 10-27 kg). Find the rms speed of these atoms.

    asked by Kieran
  70. Personal Finance

    What is the risk and return on stocks, bonds, and mutual funds? Thanks

    asked by Sarah
  71. Math

    make a conjecture (obsevations based on patterns) for each sequence below. a)7,10,13,16 b)4,44,444,4444,44444 c)2,10,50,250 d)1,2,6,42,1806,3263442 i got some of them but i think they need to be writen better a)Add three to each number to get the next

    asked by Dan
  72. japanese

    What do the following sentences mean translated to English? Kore no han wa watashi no desu To no soto ni obaki ga imasu

    asked by Elizabeth
  73. economics please ?

    When quantity supplied equals quantity demanded: A. there is disequilibrium B. the marked is cleared C. there is excess quantity demanded. D. there is excess quantity supplied I'm stuck between C and D but I think it's D?

    asked by tony
  74. math

    If gas cost $ 2.20 per a gallon and you drive 130 miles at 10 miles per a gallon how much will your trip cost?

    asked by tenesha
  75. medical terminology

    The bx of the skin lesion was benign. What does the abbreviation bx stand for? A. Bactroban C. Basal cell carcinoma B. Biopsy D. Burn xeroderma

    asked by judith
  76. math

    Write fraction in lowest terms 0.05

    asked by tenesha
  77. algebra

    what is a good number sentence to show that 5 is a factor of 35?

    asked by kai
  78. dade

    If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 250, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to

    asked by max
  79. physics

    A 8kg ball is thrown up with an initial speed of 20m/s. Suppose there is a constant air resistence of 30N opposing the motion during its entire up and down path. How long will it take to get to the highest point in its path? how high is the highest point?

    asked by dipset
  80. physics

    A particle with a charge 7C and a mass of 20kg is traveling in a circular path around a fixed particle of charde -5C. The velocity is observed to be 3000m/sec. What is the radius of the circular path?

    asked by dipset
  81. social studies

    Under capitalism the role of the government is best described as: A. nonexistent B. limited C. significant D. extensive I chose B, am I right?

    asked by ciara
  82. polymer

    how can we set up column for monomer purification give the minimum lenth and diametter for the column.

    asked by pradee
  83. chemistry

    give the solgel preparation of zirconium oxide powder

    asked by pradee
  84. spanish

    "Doctor Pérez, me duele mucho la pierna. ¡Ay!" "Miguel, ¿te duele _____ ?" a. la derecha o la izquierda b. el derecho o el izquierda c. la morada o la rosada d. la quinta o la séptima A? My teacher says it is D. What do you think?

    asked by Lily
  85. Math symbols

    What does * mean in math? thanks for ur help Abby

    asked by Abby
  86. physics

    A 2kg ball attached to the ceilling with a string is released and swings back and forth. Assume there is no air resistance. At the bottom of the path the lowest point the velocity is 4m/s. What is the velocity when it returns to the lowest point

    asked by karen
  87. physics

    umm i need help...which equation would i use to solve the probnlem and how do i go about finding the answer? Here it is: Sam tosses a ball horizontally off a footbridge at 3.1 m/s. How much time passes after he releases it until its speed doubles?

    asked by tj
  88. 4th grade

    23x17 in expanded algorithm

    asked by jayline
  89. HIT

    ABC Health Care’s insufficient record-tracking system has created a backlog of incomplete medical records.

    asked by Shala
  90. Finance

    You made a bank deposit in UK sterling that matures next December. The interest rate was 10% while home rates are only 4%. You thought you would be going to London at the end of the year, but now you cannot. The outlook for pounds is depreciation, but you

    asked by Michelle
  91. Math

    How many terms are in this sum? 5x - 6a + 8

    asked by Andrew-3
  92. math

    How do u solve this I(-2)(2)I +8-6 I3I +3(-2) an the "I" represents a parellel line

    asked by Anonymous
  93. physics

    anyone else know how to go about solving this complicated problem? Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is traveling at 5.00 m/s when it reaches her. What was the speed of the ball when it left

    asked by sabeen
  94. Health

    roles, requirements or other credentials to fill your chosen role.

    asked by Shala
  95. physics

    anyone??? A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when it hits the ground? thanks.

    asked by sabeen
  96. economics

    Black markets result from: A. price floors B. price ceilings C. shifts in demand D. competitive price outs I think it's C?

    asked by tony
  97. physics

    a dog runs down the road at 8 m/s. a car falls in front of him, making him stop. how long would it take him to stop of the coefficient of friction is .47?

    asked by danielle
  98. math

    Bill needs to buy 24 bottles of soda. Each bottle is $ 1.75 including tax. If he has a hundred dollar bill how much change will he get?

    asked by tenesha
  99. Social Studies

    How did geographic conditions in Panama make it difficult to build a canal there?

    asked by Teonia
  100. Physics

    A car goes through a curve with a constant velocity of 60mph and experiances a centripital acceleration of 77.4 ft/secsquared. Find the radius of the curve.

    asked by Elise
  101. trig

    what is the amplitude, period and phase shift of y= 8cos (x-90)

    asked by Erickaaa
  102. math

    the study hours are 4, 10, 20, 24, 34, 36, 42 and the z scores are 2.5, negative 1.75, negative .5, 0, 1.25, 1.5, 2.25 and the percentile ranks are 10,25,35,40,50,75,95 what is the study hour with a z score of 1.75, what is the standard deviation of all

    asked by christina
  103. Physics

    A 200kg motorcycle is driving in a circular path at 1 rev per 5 seconds and the circle has r=12m

    asked by Ashley
  104. Physics

    The frequency of an electon orbiting a nyclear is 1000000000 cps and the radius is 5 * 10 to the -12m. Find the velocity of the electron.

    asked by Elise
  105. statistics

    is 30 years the average age of a population? describe its population and distribution

    asked by tasha
  106. everest

    The temporary owners equity are closed because they apply to only one accounting period?

    asked by Anonymous
  107. eng

    where does scene one take place in act four ?

    asked by mugga
  108. 10th grade

    i have an equation; x^2+3x-18=0. i am given one of the roots, of which is 3, but how do i find the other root.

    asked by isaiah
  109. math

    Assume that you start with $900 per month healthcare increase and add five percent(5%) per year for the two (2) remaining years of a three year contract. Show the cash value and roll-up value of the increase

    asked by Rochelle
  110. physics

    A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when it hits the ground?

    asked by sabeen
  111. physics

    Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is traveling at 5.00 m/s when it reaches her. What was the speed of the ball when it left your hand if you released it at a height of 1.10 m?

    asked by sabeen
  112. Math

    m+8+2+n

    asked by Andrew
  113. Math

    Combine like terms a + a/4 + 3a/4 + 2a

    asked by Andrew-2
  114. music read

    I need to learn one whole song,I want to do smoke on the water, I need help.

    asked by shane