don

Newest questions posted by don
  1. physics

    A box is pushed a distance of 2 m with a force of 20 N. How much work is done on the box?
  2. Calculus

    Let f(x)= (x^2 -4)/(x-2) and note that lim as x approaches 2 , f(x)=4. For each value of E, use a graphing utility to find all values whenever 00, make a conjecture about the value of delta S that satisfies the preceding inequality. How would you do this
  3. CHEMISTRY

    A(aq) + B(aq) + C(aq) → D(aq) [A]. [B]. Rate (mol) 0.01 0.02 0.0005 0.02 0.02 0.0010 0.01 0.04 0.0020 Determine : a) The order of the reaction of each reactant b) The rate law c) The rate constant K, Using result from experiment 1. Please working answers
  4. Earth science

    If a sample contains 50g of carbon 14 and 50g of nitrogen 14 , how many lives has it undergone ?
  5. Earth science

    If a sample contains 50g of carbon 14 and 50g of nitrogen 14 , how many lives has it undergone ?
  6. Physics

    Jason while driving on Kukum highway at 70 m.s – 1 seeing the traffic light turn red, he applies the brake and comes to rest in a time of 2 seconds. What is his deceleration?
  7. Math

    How do you write ln(n) in log form? I know that you can convert log of some base by doing ln of the variable over ln of the base, but I don't know how to do the opposite.
  8. math

    Anna has $15 more than Lala does. If I gave Lala $60, she will have three times as much as Anna. Find how much Lala has at the first place?
  9. probability

    the probability of winning a carnival game is 15%. Elaine plays 10 times. find the probability that Elaine will win 2 times.
  10. math

    5 apples costs 7 kg. Let x be the cost of 7 apples, make an equation to find out the cost of 7 apples
  11. Algebra

    Six times a number less ten is equal to two times the same number plus four.
  12. Finance

    Ron starts with a $100,000 mortgage at 8% for 30 years, annual payments. Ten year into the mortgage Ron is able to refinance the balance of the mortgage at 6%. a) If he chooses to refinance for 20 years what would his new payments be?
  13. Finance

    Ron starts with a $100,000 mortgage at 8% for 30 years, annual payments. Ten year into the mortgage Ron is able to refinance the balance of the mortgage at 6%. a) If he chooses to refinance for 20 years what would his new payments be?
  14. Maths

    Four numbers 2, -3, 5 and -7 are arranged in a pattern as shown. 2, -3, 5, -7, 2, -3, 5, -7, 2, -3 .......... what is the 2005 number?
  15. easy math

    What value of c makes x^2 + 6x + c a perfect square trinomial? 3 6 9 12
  16. Math

    Bakery salary $24,000 Kitchen salary $26,000 Catering salary $30,000 Bar salary $30,000 Server/host $25,000 What department has the largest difference between the highest and lowest employee
  17. Math

    Number of employees in Kitchen is 2 Salary is $52,000 Avg. cost of employee 26 If the avg. cost per salaried employee increase by $4,000 in the kitchen department, what is the new average cost per employee in the department
  18. Language

    What word means the opposite of offensive Affable Zealous Acclivitous Intimate Synergetic
  19. Math

    Start at 5. Create a pattern that adds 3 to each number. Stop when you have 5 numbers.
  20. Technology

    To insert clip art into a document, what step should I take immediately after i find the clip art I want to insert? a. Use scroll bars to view more choices of clipart. b. Click on the clip art image. c. Click on the clip art button. d. Click insert tab at
  21. Math

    100(1+100) Example : 1+2+3+…+100= ----------- 2 Simplify: (x+1) + 2(x+1)+ …+1000(x+1)
  22. English

    It is not from the benevolence of the butcher the rewer, or the baker, that we expect our dinner, but from their regard to their own interest.
  23. math

    If you place $2,000.00 in a saving account with an interest rate of 4.5% month versus an account with a rate of 3.75% month, how much more interest could you earn in that month using the first account?
  24. Math (Help Please)

    1. Which of the following shows how this expression can be simplified? 2x + 6 + 3x − 4 A. x − 2 B. x + 2 C. 5x + 2 D. 5x − 2 2. Which is equivalent to the expression below? 7(2p − 1) A. 7p B. 14p − 1 C. 14p − 7 D. 14p − 8 3. Factor the
  25. FIN 301

    1. Cliff Arthur has equally attractive job offers in Miami and Los Angeles. The rent ratios in the cities are 8 and 20, respectively. Cliff would really like to buy rather than rent a home after he moves. Explain how to interpret the rent ration and what
  26. Physics

    a 475 kg pre-stressed concrete beam is to be raised 10.0 m in 24.0 s. how many kw of power is needed to for the job
  27. physics

    Show that the kinetic energy of two particles with mass m1 and m2 split into the energy of the centre of mass and the kinetic energy of relative motion.
  28. physics

    A car covers half a distance at a velocity of 80km/h and the other half at 60km/h,what is the average velocity of the car?
  29. English LAST 1. (:

    It's about MLk I Have A Dream speech. Why does King use the rhetorical technique of parallel structure in his speech? A)to show that he is aware of the time that has passed B)to show that others are not aware of the time that has passed C)to show that two
  30. English **One Question**

    In a sense we have come to our nation's capital to cash a check. When the architects of our republic wrote the magnificent words of the Constitution and the Declaration of Independence, they were signing a promissory note to which every American was to
  31. Market Research

    Let N  6 and n  3. For purpose of studying sampling distributions, assume that all population values are known. Specically, y1  98, y2  102, y3  154, y4  133, y5  190, and y6  175. We are interested in yU, the population mean. Two sampling plan
  32. Math

    The college president asks the statistics teacher to estimate the average age of the students at their college. How large a sample is necessary? The statistics teacher decides the estimate should be accurate within half year and be 92% confident. From a
  33. math

    you download 12 new songs to your mp3 player. then you delete 5 old songs.. write each amount as an integer?
  34. Math

    Simplify the following expressions by using trigonometric form and De Moivre's theorem a. (√3-i)^4 b. (-4+4i√3)^5 c.(2+3i)^4 d. (4-i)^6
  35. algebra

    A three quarter inch wire has 12 ohms resistance. How much resistance has the same length of half-inch wire, if resistance varies inversely as the square of the diameter?
  36. English

    What is a metaphor for a deep voice?
  37. Math homework help

    Check out the polar coordinate pairs that label the same point. Several pairs may be possible. A) (2, 2pi/3) B) (2, -pi/3) C) (-3, pi) D) (2, 7pi/3) E) (3,0) F) (-3,0) G) (-2, -pi/3) H) -3, 2pi)
  38. Algebra 1

    2+11b=8b+15
  39. DISCRETE MATHS

    Prove that if n is an odd positive integer, then 1 ≡ n2 (mod 4).
  40. DISCRETE MATHS

    Use the Euclidean Algorithm to find gcd(112,15)
  41. DISCRETE MATHS

    What is the cardinality of this set? {p, {p}, {p, {p}}} my answer is 1. is it right?
  42. pre-calculus

    Move point (3,50 degrees) according to the following symmetries (keep positive) a. symmetrical to the origin b. symmetrical to theta=0 degrees c. symmetrical to theta= 90 degrees
  43. stats please help ASAP!!!

    A. The GPAs of all 5540 students enrolled at a University have an approximately normal distribution with a mean of 3.02 and a standard deviation of 0.29. Let x be the mean GPA of a random sample of 48 students selected from this University. Find the mean
  44. MATHS STATISTICS

    B. A soft-drink vending machine is supposed to pour 8 ounces of the drink into a paper cup. However, the actual amount poured into a cup varies. The amount poured into a cup follows a normal distribution with a mean that can be set to any desired amount by
  45. MATHS STATISTICS

    A. According to an estimate, 50% of the people in the United States have atleast one credit card. If a random sample of 30 persons is selected, what is the probability that 19 of them has atleast one credit card? PLIZ REALLY NEED HELP!! THANKS VERY MUCH..
  46. linear algebra

    solve using gauss jordan 10y − 4z + w = 1 x + 4y − z + w = 2 3x + 2y + z + 2w = 5 −2x − 8y + 2z − 2w = −4 x − 6y + 3z = 1
  47. Math

    The local dinner offers a meal combination consisting of an appetizer, two soups, four main courses, and five desserts. Your diet retricts you to choosing between a dessert and an appetizer. (You cannot have both). Given this restriction, how many
  48. mathURGENT!!!!!!!!!!

    if 4^(x)-4^(x-1)=24 what is the value of (2x)^x? please answer and explain step by step how u got it... PLEASE?????
  49. mathURGENT!!!!!!!

    if (4^x)-(4^x-1)=24 what is the value of (2x)^x? please answer and explain step by step how u got it... PLEASE?????
  50. Physics

    A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.12 m. The normal to the plane of the loop is parallel to a constant magnetic field ( = 0°) of magnitude 0.85 T. What is the change ÄÖ
  51. Physics

    In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 2.20 104-m length of wire was let out by the space shuttle Atlantis to generate a motional emf. The shuttle had an orbital speed of 7.50 103 m/s, and the
  52. Physics

    A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field
  53. Physics

    A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field
  54. Physics

    A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field
  55. Physics

    An electron has a kinetic energy of 7.00 10-17 J. It moves on a circular path that is perpendicular to a uniform magnetic field of magnitude 4.40 10-5 T. Determine the radius of the path?
  56. Physics

    A wire has a length of 5.40 10-2 m and is used to make a circular coil of one turn. There is a current of 2.30 A in the wire. In the presence of a 3.80-T magnetic field, what is the maximum torque that this coil can experience?
  57. Physics

    A wire has a length of 5.40 10-2 m and is used to make a circular coil of one turn. There is a current of 2.30 A in the wire. In the presence of a 3.80-T magnetic field, what is the maximum torque that this coil can experience?
  58. Physics

    An á-particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.16 106 V and then enters a uniform magnetic field whose magnitude is 3.00 T. The á-particle moves
  59. mathURGENT!!!!!!

    for which integers will the square of the integer decreased by twice the integer produce a difference of less than 4? please answer and explain how you got the answer...please????!!
  60. mathURGENT!!!!!!

    what is the greatest value of m such that 25!/5^m is an integer? hint: the exclamation point means "factorial". 3!=3*2*1=6 4!=4*3*2*1=24 etc. please answer and explain how you got it!!!!please???
  61. MA111

    lim x!0 k + cosmx x2 = −4 . FIND M AND X?
  62. math

    A telephone pole is 55 feet tall. Jeri stands in the shadow of the pole. She is 66 inches tall, gut her shadow is 12 feet long. How far away from the telephone pole is she standing.
  63. Maths

    How many ordered triples of positive integers (a,b,c) with 1
  64. maths

    How many ordered triples of positive integers (a,b,c) with 1¡Üa,b,c¡Ü5 are there such that ax^2+bx+c has a rational solution?
  65. Probabilities

    A queen on an English chessboard is able to attack in the same row, column and diagonal. The probability that 2 randomly placed queens on an 8 by 8 chessboard will be able to attack each other can be expressed as a/b , where a and b are positive, coprime
  66. Physics

    The coil of wire in a galvanometer has a resistance of RC = 78.0 Ù. The galvanometer exhibits a full-scale deflection when the current through it is 0.440 mA. A resistor is connected in series with this combination so as to produce a voltmeter. The
  67. Physics

    In the drawing below, R1 has a resistance of 6.2 Ù and R2 has a resistance of 2.6-Ù. Determine the current (magnitude and direction) in the 6.2 and 2.6-Ù resistors in the drawing.
  68. Physics

    A battery has an internal resistance of 0.017 Ù and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.75 V?
  69. math

    How much money would have to be deposited into a compound interest savings account earning 5% each year in order to accumulate $10,000 in 18 years?
  70. trig

    To determine the distance to an oil platform in the Pacific Ocean, from both ends of a beach, a surveyor measures the angle to the platform from each end of the beach. The angle made with the shoreline from one end of the beach is 83 degrees, from the
  71. calculus

    I need help with this problem: The path traveled by a golf ball with a 9-iron can be modeled with the quadratic equation, y= -0.042xsquared + 5x, where x is the distance in yards from the point it was hit and y is the height of the golf ball in feet.
  72. Physics

    The electric potential energy stored in the capacitor of a defibrillator is 77 J, and the capacitance is 123 µF. What is the potential difference that exists across the capacitor plates?
  73. mathURGENT!!!!!!!!!!

    find all ordered pairs of positive integers (x,y) that satisfy the following equation: x^y=2^64. please answer and explain how you got it!!!!
  74. mathURGENT!!!!!!

    the lines satisfying the equations x+2y=3 and 3y+ax=2 are perpendicular to each other. find the value of 'a'. please answer and explain how you got, please!!
  75. mathURGENT!!!!!!

    determine the smallest prime number that divides the following sum: 3^12+5^13+7^14+11^15? please answer and explain step by step how u got it!!!!
  76. Physics

    The drawings show three charges that have the same magnitude but different signs. In all cases the distance d between the charges is the same. The magnitude of the charges is |q|= 5.5 µC, and the distance between them is d = 4.3 mm. Determine the
  77. Physics

    Two tiny conducting spheres are identical and carry charges of -19.8 µC and +54.5 µC. They are separated by a distance of 2.45 cm. (a) What is the magnitude of the force that each sphere experiences, and is the force attractive or repulsive? 1 N 2
  78. mathURGENT!!!!!!!

    a certain type of candy is sold in small boxes of 8 and large boxes of 15. notice it would be impossible to buy exactly 12 candies without breaking up a box. it would also be impossible to buy 17 candies without breaking up a box. what is the greatest
  79. math URGENT!!!!!!!

    a certain type of candy is sold in small boxes of 8 and large boxes of 15. notice it would be impossible to buy exactly 12 candies without breaking up a box. it would also be impossible to buy 17 candies without breaking up a box. what is the greatest
  80. MATH URGENT!!!!!!!

    the will of an eccentric millionaire reads as follows: "i leave 4/17 of my estate to my son, 7/13 of the remainder to my wife, 2/3 of this remainder to my daughter, and the remaining $2million to my dog." what was the total amount of the estate? please
  81. CHEMISTRY

    An equilibrium mixture of the following reaction was found to have = 0.0325 at 1200 degrees C. What is the concentration of I? I2(g)2I (g) Keq=1.3×10−2 at 1200
  82. chem 4

    How many grams of sodium chloride are needed to make 1 L of 0.9% (m/v) sodium chloride solution (“isotonic saline”).
  83. chem 3

    (a) If H is positive and S is negative, would G to be positive or negative or is it dependent on T? (b) For the sign of G that you have in part (a) would the reaction be spontaneous, nonspontaneous, or dependent on the value of T?
  84. chem 2

    What is the concentration of the final solution if 1 liter of 6 M HCl is diluted to a final volume of 2 L?
  85. chem 1

    if 58.44 g of sodium chloride is dissolved in 0.5 liter of water what is the molarity of the sodium chloride solution? The molar mass of sodium chloride is 58.44 grams per mole.
  86. chem

    2 NO(g) + O2(g) 2 NO2(g) For the reaction above tell whether the reaction would shift to the left (L) or right ® if I a. Increased the total pressure of the system b. Removed O2 from the system c. Increased the amount of NO in the system
  87. Physics

    A 0.069-kg arrow is fired horizontally. The bowstring exerts an average force of 65 N on the arrow over a distance of 0.95 m. With what speed does the arrow leave the bow?
  88. Physics

    A cable lifts a 1060-kg elevator at a constant velocity for a distance of 39 m. What is the work done by each of the following?
  89. Physics

    A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0120 s. The average force exerted on him by the ground is +17000. N, where the upward direction is taken to be the
  90. Physics

    Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?
  91. Physics

    Two banked curves have the same radius. Curve A is banked at an angle of 11°, and curve B is banked at an angle of 16°. A car can travel around curve A without relying on friction at a speed of 18.5 m/s. At what speed can this car travel around curve B
  92. Physics

    A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (è = 60.0°) Suppose the total mass of a chair and its occupant is 222 kg
  93. physics

    Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 595 rev/s. A point on one of the blades traces out a circle with a radius of 0.02 m as the blade rotates. (a) What is the
  94. physics

    A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 4.20 104 s. What is the speed at which the satellite travels?
  95. Physics

    A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle è = 20°. For a speed of 40 m/s, at what value of the distance d should a driver
  96. Physics

    Two banked curves have the same radius. Curve A is banked at an angle of 11°, and curve B is banked at an angle of 16°. A car can travel around curve A without relying on friction at a speed of 18.5 m/s. At what speed can this car travel around curve B
  97. Physics

    A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 31 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 145 m), the block swings toward
  98. Physics

    A stone has a mass of 6.00 10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.73. When the tire surface is rotating at a maximum
  99. Physics

    The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration
  100. Physics

    The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration

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