Posts by tina

Total # Posts: 1,262

  1. Chemistry

    Which of the following is a correct statement about collision theory? A. All collisions lead to chemical reactions. B. Most collisions lead to chemical reactions. C. Very few reactions involve particle collisions. D. Effective collisions lead to chemical reactions. E. ...
  2. Algebra

    How high is a tree that casts a 22 from shadow at the same time that a 4 ft fence post casts a 4 ft shadow the trees height is
  3. Physics

    i keep getting the incorrect answer.
  4. Physics

    i guess im just not sure where to start
  5. Physics

    a 4,500 kg roller coaster starts from the top of a 45 m hill with a velocity of 3m/s. The car travels to the bottom through a loop and continues up the next hill. The end of the roller coaster has a level surface that is 4m off the ground. Assume that there is no friction on ...
  6. Physics

    The Sound of Tissue is 1550m/s. What frequency ultrasound wave should you use to make sure you probe 65mm into the body?
  7. physics

    A 200g mass is attached to a spring and allowed to execute simple harmonic motion with a period of 0.25seconds. If the total energy of the system is 2.0 joules, find the force constant of the spring and the amplitude of the motion.
  8. Math

    Rachel’s biscuits require 0.75 cup of milk for 1 batch. Use dimensional analysis to convert this amount into liters. Use the conversion factors 1 cup/0.5 pints to convert cups into pints, 1 pint/0.5 quart to convert pintos to quarts, and 1 quart/0.94 liter to convert ...
  9. Math

    Thank you
  10. Math

    Describe two ways to determine the larger of two fractions. A. Compare fractions by writing fractions as mixed numbers B. Compare fractions with the same denominator by comparing the numerators and compare fractions with different denominators by writing fractions as ...
  11. History

    Which most accurately describe the impact of the Crusades on the Jewish community? (Select all that apply.) During the Fourth Crusade, Saladin entered the Crusades and massacred Jews in Constantinople. During the Second Crusade, French and German kings massacred Jews in France...
  12. History

    Which accurately describes the involvement of the Catholic Church in medieval European governments? The Catholic Church forced European lords and barons to spare extra lands for peasant farmers. The rules and rituals of the Church guided the administration of government in ...
  13. Math

    A number rounded to the nearest 10 is 830. Find the greatest possible number.
  14. chemistry

    How many years would it take to fly to the sun on a spacecraft that travels 1,000 m/s? (The sun is 93,000,000 miles away) (USE DIMENSIONAL ANALYSIS)
  15. Math

    A flooring company charges a homeowner a fixed labor charge of $V1 plus V2 per square foot of flooring.  If the total bill was T, what is the equation to show how many square feet of flooring the homeowner required?
  16. Math-------please help

    a square carpet covers 60% of the floor area the room is 5m by 5m what are the dimensions of the carpet
  17. chemistry

    what volume of ammonia gas, measured at 647.5 mmHg and 36.1C is required to produce 6.53 g of ammonium sulfate according to the following. 2NH3+H2SO4-(NH4)2SO4
  18. number theory

    I would go with 0
  19. Math

    (X * 1/4) + X = 3 1/3 X is the unknown number 1/4X + 4/4X = 10/3 5/4X = 10/3 X = 10/3 * 4/5 X = 40/15 X = 8/3 = 2 2/3
  20. Physics II

    Two long straight parallel wires separated by L2 = 8.16 cm carry currents of equal magnitude but heading in opposite directions. The wires are shown perpendicular to the plane of this page. Point P is L1 = 1.96 cm from wire 1 and the magnetic field at point P is 1.22 x 10?2 T ...
  21. Physics II

    A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, a 47.0 ?F capacitor is charged to 5.91 kV. Paddles are used to make an electrical connection to the patient's chest. A pulse of current lasting 1.00 ms ...
  22. College Algebra

    A 40 ?-inch board is cut into two pieces. One piece is three times the length of the other. Find the lengths of the two pieces.
  23. math

    The ratio of male fish to female fish in a aquarium is 21:20. If there are 123 fish how many are male?
  24. Physics

    A beaker of water placed on a scale produces a reading of 0.910kg. An object of mass 0.27kg and volume 9.40 x 10^-5m^3 is lowered into the water by a string. By how much will the reading on scale change?
  25. physics

    Suppose a tank contains 714 m3 of neon (Ne) at an absolute pressure of 1.01×10^5 Pa. The temperature is changed from 293.2 to 294.7 K. What is the increase in the internal energy of the neon?
  26. English

    If you were to select one passage from the novel the great gatsby to represent one of the five major characters (gatsby, nick, daisy, tom, or jordan) which passage would best reflect that characters personality and why ?
  27. Math

    1/8 5/8 2/3 3/4
  28. Math

    Order the fractions from least to greatest 2/3 5/8 1/8 3/4
  29. Math

    A 26 long painting is how many yard long
  30. Math

    If the total cost of producing X units of a product is given by C(X)= 10,000 + 20xe X/600... find the marginal cost when 600 units are produced
  31. algebra

    Cindy put 1and 2 thirds cups of peanuts and 1 and 3/5 cups of popcorn into a bag what's the expression represents the total number of cups of peanuts and popcorn Cindy took to camp
  32. Math

    3,2, and 1 are x The rest is y
  33. Math

    Graph the given functions below X Y f(x)={3 0 < eqaul to x< 2 f(x)={2 2< equal to x < 4 f(x)={1 4 < equal to x < 6
  34. Math

    Graph the function below F(x)={2/3x x<-2 {-2 -2 < eqaul to x <1 {-3x+1 x > eqaul to 2
  35. Math

    I got y=1/3x + 13/3
  36. Math

    I fixed my answer but I'm not sure if it is right... a)The mean would increase while the median would remain the same. b) Both the mean and median would remain the same.
  37. Math

    Here is the question:Consider a data set of 15 distinct measurements with mean A and median B. (a) If the highest number were increased, what would be the effect on the median and mean? Explain. The mean would remain the same while the median would increase. Both the mean and ...
  38. Algebra

    How do I put these two equations below into a Table with at least 5 point. 2x-y=2 4x-2y=8 Important question: Am I suppose to have 1 table for each equations.
  39. Algebra

    So am I suppose to have 2 charts for each
  40. Algebra

    Create a system of equation that has no solution: - write the equations in two different forms(4) Create a system of equation that has infinitely many solution - write the equations in two different forms (4) One important Question: How am I suppose to form a table out of this...
  41. Math

    The relationship of red ribbons to green ribbons is 10 : 1/4. How mini red ribbons are used for every 4 1/2 green ribbons?
  42. college math

    solve these proportions and show work: x/2 = 1/2 plus 1 Thanks
  43. Statistics

    Sorry but I don't know how to do this problem. Can someone please help me? In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities. Ocean fishing for ...
  44. math

    Cos 10°
  45. mth/208

    solve d=abc for a. a=d/bc
  46. Physics science

    A 10 ohm, 20 ohm lamp and 12v battery are connected in a parallel. A current of 1.8 A passes through the battery and a current of 1.2 A passes through the motor. 1) Determine the current through the lamp. 2) Calculate the potential difference across the motor. 3) is this the ...
  47. algebra

    the perimeter of the small square is equal to one-half the perimeter of the large square, write and solve the an algebric equation to determine what the side lengths of the square are. small square is x large square is x+2
  48. Math

    What is the overall charge of 9 group with 12 protons and 1 electron? What electric charge does this group have?
  49. math

  50. science

    A crane accidently drops a box full of material into a freshwater pool measuring 20 feet long, 10 feet wide, and 6 feet deep before the box is dropped causing the water level to rise to 6.05 feet after the box is dropped. The box is 10x8x12 inches and the material inside ...
  51. Math

    The amount of annual interest earned by $8000 invested at a certain rate is $200 less than $12,000 would earn at the rate 1% lower. At what rate is the $8,000 invested?
  52. Math

    How far does a yo-yo travel during one revolution of the "around the world" trick if the length of the string is 21 inches?
  53. Criticial thinking

    As part of the reorganization,company X created five new position within the company. However , after the reorganization was complete , company X had fewer employees that before the reorganization
  54. Government

    OCA very wrong 1-c 2-d 3-d 4-b 5-a 6-c 7-d 8-c 9-c 10-b
  55. Grammar

    Use plural verbs for
  56. working with parents and families

    The help of a computer program can help reduce the time that you as a director spend on payroll by as much as A.10% B.25% C.50% D.75% Pls help
  57. math

    Jordyn is a 15 Kg 2 ½ yr old with a fever and is ordered to receive Acetaminophen 200 mg to Q 4 hr for a fever >101. The SDR for Acetaminophen is 10-15 mg/Kg/dose Q 4hrs. Calculate the SDR for this child ? SDR = 15(10) – 15 (15) = 150-225 mg / dose. 3. The ...
  58. Health

    It's considered to be an advantage to have lungs with increased capacity, because with increased capacity
  59. Math

    A large balloon has a volume of 2.50 L at 0 C. At what temperature 0 C will the volume of the gas be 3.60 L Assume constant temperature
  60. COM 425

    2) a chief executive officer
  61. COM 425

    Which of the following people would likely be identified as a cosmopolite? 1) an independent contractor 2) a chief executive officer 3) a middle manager 4) a professional development coordinator
  62. Math

    Draw a graph showing plan A) $60 for unlimited, plan B) is $40 for 100 minutes and $.20 per minute after.
  63. math

    in city high school,the marching band has 48 members and the orchestra has 36 member.if there are only 12 students who belong to only one group and all students belong to at least one group how many students belong to both group?
  64. science

    According to the Lewis Acid/Base theory, what is the neutralization equation of Acid Nacl and Base AlCl3? NaCl+AlCl3----> (NaCl+AlCl3-----> Na+AlCl4 is incorrect)
  65. Science

    According to the Lewis Acid/Base theory, what is the neutralization equation of Acid Nacl and Base AlCl3? NaCl+AlCl3----> (NaCl+AlCl3-----> Na+AlCl4 is incorrect)
  66. Scient

    (NaCl) solutions used in intravenous injections have a concentration of 0.90% NaCl (mass/volume). 4.5grams of NaCl are needed to prepare 500.0 mL of this solution How much water must evaporate from this solution to give a solution that is 9.0% NaCl (mass/volume)?
  67. Math

    Suppose a rider travelled 6.4 km in 24 minutes using a gear ratio of 1.5. What would be the circumference of the rear wheel in mm? 6.4 km in 24 minutes = ______ mm in 1 minute This is the same as _________ mm in 1 minute This is the same as ________ mm in 1 second If the gear ...
  68. science

    A chemist combines copper (Cu) and silver nitrate (AgNO3) in a beaker. She then "magically" pull silver out of the beaker. explain these results using your knowledge of chemical reactions.
  69. allied health

    If disclosure of PHI is permitted under HIPAA, What is disclosed? A. Information both the patient and doctor think should be disclosed B. the minimum information necessary to accomplish the purpose of the disclosure C. Information the doctor thinks should be disclosed
  70. Probability

    There are 3 quarters, 2 dimes, 3 nickels,. 2 coins are drawn one at a time both are dimes. Probability that this may occur is 1/4. Because 2 of the coins are dimes. Is this correct. Please explain
  71. A&P

    Assume that Na+ is being transported across a membrane via facilitated diffusion. Which of the following conditions would allow for the most transport of Na+ across that membrane. Answers: 1) a gradient of less than 5% difference between sides for the Na+ and Na+ diffusing ...
  72. Math

    Paul borrows $600 at an interest rate of 8% per years for 4 years. How much interest will he have to pay?
  73. economics

    If price $=20,30,40,50 and quantity kg=2,3,4,5. Find the financial market function for commodity x
  74. economics

    Determine price in the market when the quantity supplied is 1.2kg
  75. Math

    What is the value of the function y=-3x+8 when x=6?
  76. English

    Need answer!! pleasee
  77. math

    There are 8 gallons of water in a tank which can hold 15 gallons. How many gallons can be added to this tank.
  78. Physics

    A -6 x10^-6 point charge is .030 m from another point charge and experiences a repulsive fore of 180 N what is the magnitude of the other charge
  79. science

    How is the virtual image produced by a converging lens different from the virtual image from a diverging lens?
  80. 7th Grade Math

    Ms. Sue, Thank you so much for explaining.
  81. 7th Grade Math

    How do I solve this problem? The answer I have is 715-623 = 92 or 92%. Is this the correct answer?
  82. 7th Grade Math

    I need help with solving the answer to the problem below. What is the percent decrease, to the nearest percent, of the number of books checked out from June to July? June - 623(# of books checked out) July - 715(# of books checked out)
  83. Math

    How did you get 8.25% as 1.0825. We was taught to move the decimal two times to the left. Can you explain how you got 1.0825?
  84. Physics

    Light is bent as it enters a tank of water from air. It is bent to a greater angle when it goes from air to a glass block. Calculate the angle of refraction of 30.0° light shines from water into ice. The indices of refraction for water and ice are 1.36 and 1.31, ...
  85. Physics!! Help

    someone swings a bucket of water in a vertical circle. Describe the water's motion to another person? or How would you? & also how to explain the motion of the water to them? How come the water didn't fall on the persons head? A: Centrifugal force causes the water to ...
  86. math

    hourly truck rental terms, hourly rental rate is $25,plus $0.30 per mile john rented truck at 9:00am and returned it at 1:30 he drove a total of 100 miles? how much was he charge for time and milage?
  87. math

    If the markup on an oven is 200% based on cost, what is the corresponding percent markup based on selling price? Round percents to the nearest tenth of a percent. Do not enter the percent symbol in your answer.
  88. Science

    Ca = 0.75 , Cb = 0.735, and Ka = 7.87044 × 10 6 volume of acid is 100 mL. What is the volume of base at the equiva- lence point of this titration?
  89. Science

    Estimate the pH of a solution containing 0.5 L of 0.4 M HClO4 and 0.5 L of 0.2 M NaOH without using a calculator.
  90. Chemistry

    When an aqueous solution of sodium hydroxide, NaOH, is added to an aqueous solution of chromium(III) nitrate, Cr(NO3)3, a precipitate of chromium(III) hydroxide, Cr(OH)3, forms. Write a balanced net ionic equation for this reaction.
  91. math

    A ladder of length 6m leans against a vertical wall so that the base of the ladder is 2m from the wall. calculate the angle between the ladder and the wall
  92. Physics

    At the gym, a woman lifts 40 kilograms of weights on the leg press machine. It takes her 0.5 seconds to raise the weights a vertical distance of 0.4 meters. How much power does the woman generate when lifting the weights?
  93. Spelling

    Analogies with a word that begins with a consonant blend
  94. More math

    They are all right good job
  95. Science

    How do astronomers use spectroscope??
  96. I HATE LA 1 question

    actually it was deep!
  97. I HATE LA 1 question

    which of the following sentence is an adjective? Jack trudged home through deep snow A. Trudged B. Through C. Deep*** D. Home help plz and thank you and fast
  98. Math

    You plant a 4 foot maple tree that grows at a rate of 6 inches per year and a 2 foot birch tree grows at a rate of 8 inches per year . In how many years after planting will the two trees be the same height? How tall will each tree be?
  99. ELA

  100. Math

    Can you give me a sample of a word problem that involves two items that totals to $70. One item cost $5 more than the other. What is the cost of each item?
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