Most popular questions and responses by Aaron
  1. science

    which of the following could be true of two different species that have a competitive relationship in the same ecosystem? A.one species preys on the other B.they relationship is mutually beneficial C.they share the same niche D.one species benefits, while

    asked on December 13, 2013
  2. Math

    1) The hypotenuse of an isosceles right triangle is 8 cm longer than either of its legs. Note that an isosceles right triangle is a right triangle whose legs are the same length. Find the exact length of its legs and its hypotenuse. 2) The length of a

    asked on November 18, 2013
  3. English

    Identify the sentence pattern used below. I e-mailed my English Teacher my essay. My answer is subject verb

    asked on October 8, 2014
  4. Calc

    The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function below, where I is the light intensity (measured in thousands of foot-candles). P = (120 I) / (I^2 + I + 1) For what light intensity

    asked on November 30, 2009
  5. Chemistry

    -Calcium chloride contains calcium and chloride ions. Write the ground-state electron configuration for the calcium ion. -Write the ground-state electron configuration for the chloride ion.

    asked on November 21, 2017
  6. physics

    An ostrich can run at speeds of up to 72 km/h. How long will it take an ostrich to run 1.5 km at this top speed?

    asked on September 7, 2009
  7. math

    why do dragons sleep during the day

    asked on March 17, 2008
  8. Calculus

    Find the volume of the solid by subtracting two volumes, the solid enclosed by the parabolic cylinders y = 1 - x 2, y = x 2 - 1 and the planes x + y + z = 2, 6x + y - z + 16 = 0.

    asked on February 16, 2012
  9. Math

    Tiffany purchased a $10,000, 13-week Treasury bill that's paying 2.25%. What is the effective rate on this T-bill? A. 2.26% B. 2.2% C. 2.0% D. 2.7%

    asked on January 5, 2015
  10. Algebra

    If n is the set of natural numbers that are factors of 16, what is the set in roster form? My answer is 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16

    asked on October 4, 2014
  11. life orintation

    TOPIC:campaign with responsibility CRITICAL FOR MARKS (A)introduction (3marks) (B) description of recent service delivery protest (5marks ) (C)research on processes of campaigns and protests (20 marks) (D)evaluation of current protests (20marks) (E)

    asked on May 10, 2015
  12. Math

    If m

    asked on August 8, 2013
  13. physics

    Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth : An oak barrel with a lid of area 0.25 m^2 is filled with water. Along, thin tube of cross-sectional area 5.5×10−5 m^2 is inserted into a hole at the

    asked on June 12, 2011
  14. Programming concepts

    Develop a menu-driven program that inputs two numbers and, at the user’s option, finds their sum, difference, product, or quotient. top-down modular approach and pseudocode to design a suitable program to solve it. I am having so much trouble with this I

    asked on August 1, 2014
  15. Algebra

    1. Find all the real square roots of a. .0064 b. - .0081

    asked on March 5, 2017
  16. statistics math

    The unemployment rate is 5.8% (Bureau of Labor Statistics, April 3, 2003). Suppose that 100 employable people are selected randomly. 1)What is the probability that exactly six people are unemployed (to 4 decimals)? 2)What is the probability that exactly

    asked on October 18, 2009
  17. Physics

    If the speed of sound in air is 340 m/s, what is approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 140 Hz? Answer in units of cm.

    asked on April 1, 2010
  18. science

    A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two

    asked on December 13, 2013
  19. Physics

    A skydiver deploys his parachute when he is 950m directly above his desired landing spot. He then falls through the air at a steady 5.0 m/s . There is a breeze blowing to the west at 1.1 m/s. At what angle with respect to vertical does he fall? By what

    asked on December 11, 2012
  20. Physics

    If the speed of sound in air is 340 m/s, what is approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 140 Hz? Answer in units of cm.

    asked on April 1, 2010
  21. chemistry

    A student dissolves a .726 g aspirin tablet in water and titrates the solution with .272 M NaOH are required to reach the equivalence point. Calculate the percentage of acetylsaliclic acid in the tablet. I am not really sure where to start with this. I

    asked on February 27, 2017
  22. physics

    A violin string vibrates at 440 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end?

    asked on April 6, 2012
  23. Algebra I

    volume of a basketball is 448.9 cubic inches. with the formula V=4/3(pie)radius(cubed) for the volume of the ball, find the radius of the basketball

    asked on January 20, 2014
  24. physics

    Grant accelerates a 1kg ball 5.0m/s2 horizontally. The vertical acceleration of the ball is zero. The force of gravity is the only external force acting on the ball other than the forces Grant exerts on it. a-How large is the horizontal force grant exerts

    asked on March 1, 2015
  25. Math

    Julio purchased some power tools totaling $2,174 using a six-month deferred payment plan with an interest rate of 28.19%. He did not make any payments during the deferment period. What will the total cost of the power tools be if he must pay them off the

    asked on November 10, 2017
  26. science

    why does buying food that is grown in your local area help prevent loss of biodiversity?

    asked on December 12, 2013
  27. science

    What activities would contribute the most global warming?

    asked on December 12, 2013
  28. Chemistry

    Write the element symbol and charge for this monatomic ion: Consider a monatomic ion that has the electron configuration of [Kr]4d^10 5s^2 and a charge of 2+

    asked on November 21, 2017
  29. Math

    What point maximizes the objective function P = 4x + 3y for the constraints below. What is the maximum value? Constraints: x>=0 y>=0 y=y

    asked on October 13, 2016
  30. physics

    Two 72.0 kg hockey players skating at 5.25 m/s collide and stick together. If the angle between their initial directions was 125 degrees, what is their speed after the collision?

    asked on March 19, 2010
  31. physics

    A helicopter is ascending vertically with a speed of 5.03m/s . At a height of 132m above the Earth, a package is dropped from the helicopter. How much time does it take for the package to reach the ground?

    asked on September 4, 2013
  32. physics

    You're in an airplane that flies horizontally with speed 860 km/h (240 m/s ) when an engine falls off. Neglecting air resistance, assume it takes 26 s for the engine to hit the ground. Hight of airplane is: H = 3.3 km horizontal distance that the aircraft

    asked on October 12, 2018
  33. Physics

    A single conservative force F(x) acts on a 1.6 kg particle that moves along an x axis. The potential energy U(x) associated with F(x) is given by U(x) = -2.9xe-x/3 where x is in meters. At x = 3.4 m the particle has a kinetic energy of 7.2 J. (a) What is

    asked on March 7, 2011
  34. Geometry

    There are three points on a line, A, B, and C, so that AB = 12 cm, BC = 13.5 cm. Find the length of the segment AC . Give all possible answers.

    asked on November 10, 2017
  35. Chemistry

    A 76.00-pound flask of mercury costs $132.00. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values.

    asked on January 28, 2015
  36. Calc

    An oil refinery is located on the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 3 km east of the refinery. The cost of laying pipe is $300,000 per

    asked on November 30, 2009
  37. math

    For an 18 month period, the last term is and the series sum is . For a 24 month period, the last term is and the series sum is . For a 30 month period, the last term is and the series sum is .

    asked on December 6, 2016
  38. Chemistry

    What is the pH of a buffer system that contains 0.18M NH4+ and 0.14M NH3? The pKa of NH4+ is 9.25.

    asked on April 18, 2013
  39. Chemistry

    An interference filter is to be constructed for isolation of the nitrobenzene absorption band at 1537 cm-1. (a) If it is to be based on first-order interference, what should be the thickness of the dielectric layer (refractive index of 1.34)? (b) What

    asked on February 27, 2016
  40. math

    x: -2,-1, 0, 1, 2 ------------------- y: 9, 4,-1,-6,-11 find the function rule. please??

    asked on March 30, 2015
  41. science

    What is true? A.biodiversity provides additional that raise the carrying capacity of an ecosystem B.biodiversity increases an ecosystem's ability ti withstand changes C.biodiversity makes an ecosystem more difficult to destroy D.biodiversity provides

    asked on December 13, 2013
  42. Pre Cal 12

    A 12cm by 8cm rectangular piece of metal is to be made into an open-top box by cutting a sqaure from corner and folding up the resulting flaps (sides). If the volume of the lidless box is 36 cm what are the integer dimensions of the box?

    asked on January 26, 2017
  43. Physics

    In an electric freezer, 400.0 g of water at 18.0 degree C is cooled, frozen, and the ice is chilled to -5.00 degree C. How much total heat was removed from the water

    asked on August 24, 2017
  44. science

    What determines the carrying capacity of a particular population by an ecosystem? A.keystone species B.pioneer species C.limiting factors D.renewable resources

    asked on December 12, 2013
  45. Math

    Samantha wants to find the height of a pine tree in her yard. She measures the height of the mailbox at 3 feet and its shadow at 4.8 feet. Then she measures the shadow of the tree at 56 feet. How tall is the tree?

    asked on November 19, 2015
  46. science

    Use of which of the following does not contribute carbon dioxide to the environment? refrigerator charcoal grill computer bicycle

    asked on December 12, 2013
  47. Physics

    A boy tosses a football upward. If the football rises a vertical distance of 1.1 m and the boy catches it at the same point he released it, what is the velocity of the ball just before he catches it?

    asked on January 27, 2012
  48. Calculus

    Let f be the function given by f(t) = 2ðt + sin(2ðt) a) Find the value of t in the open interval (0,20 for which the line tangent at (t, f(t)) is parallel to the line through (0,0) and (2,4ð) b) Suppose the given function describes the position of a

    asked on December 19, 2008
  49. Math

    Jill traveled to Canada and bought a new lamp for $460 Canadian dollars. In U.S. dollars (to the nearest cent) this is equivalent to

    asked on December 28, 2014
  50. Math

    Show how to make one addend the next tens number. 15+37=?

    asked on October 17, 2017
  51. Goverment

    Which of the following was one compromise related to the Declaration of Independence that was agreed to by the delegates to the second continental congress? Language condemning the slave trade was removed Language criticizing the English people was

    asked on August 17, 2016
  52. Accounting

    Starfax, Inc., manufactures a small part that is widely used in various electronic products such as home computers. Operating results for the fi rst three years of activity were as follows (absorption costing basis): In the latter part of Year 2, a

    asked on February 8, 2011
  53. Algebra

    the foci of the ellipse given by the equation 100x2 + 25y2 = 2500?

    asked on December 13, 2016
  54. chemistry

    Calculate the molar heat of neutralization in kJ/mol of the reaction between HA and BOH given the following information: The temperature change equals 7C, 50 mL of 1 M concentration of Acid 50 mL of 1 M concentration of Base Heat capacity of the

    asked on March 28, 2010
  55. physics

    A stone is thrown upward with a speed of 20 m/s. It is caught on its way down at a point 5.0 m above where it is thrown. A) How fast was it going when it was caught? B) how long did the trip take?

    asked on December 12, 2012
  56. physics

    A person holds a 1.56 baseball in his hand, a distance of 34.0 cm from the elbow joint, as shown in the figure(Figure 1) . The biceps, attached at a distance of 2.75 cm from the elbow, exerts an upward force on the forearm. Consider the forearm and hand to

    asked on October 25, 2012
  57. Algebra

    Identify the type of conic section that has the equation 9x^2+ 25y^2 =225 and identify its domain and range.

    asked on December 14, 2016
  58. Biology

    What amino acid property makes proteins highly functional? I would assume it would be the structure and sequence, but are there additional properties?

    asked on February 23, 2017
  59. math

    Can someone please help me with this word problem!?! I know the answer which is 784 feet. But I have no clue how to solve it. Can someone please show how to solve this problem? The word problem is: The melt in Your Mouth Chocolate Factory is a rectangular

    asked on September 4, 2012
  60. Algebra

    The equation h = -16t^2 + 32t + 9 gives the height of a ball, h, in feet above the ground, at t seconds after the ball is thrown upward. How many seconds after the ball is thrown will it reach its maximum height? What is its maximum height?

    asked on November 26, 2016
  61. physics

    Compute the order of magnitude of the mass of (a) a bathtub filled with water, and (b) a bathtub filled with pennies. In your solution list the quantities you estimate and the value you estimate for each.

    asked on September 20, 2010
  62. chemistry

    For each of the following precipitation reactions, calculate how many grams of the first reactant are necessary to completely react with 17.5 of the second reactant.

    asked on April 27, 2012
  63. science

    A salamander is a keystone species in a forest ecosystem with high biodiversity. This species migrates from woodland areas to a local stream to reproduce. If a road is built that cuts off the woodland areas from the stream, what effect will this have on

    asked on December 13, 2013
  64. physics

    A cat is chasing a mouse. The mouse runs in a straight line at a speed of 2.2 m/s. If the cat leaps off the floor at a 29° angle and a speed of 4.0 m/s, at what distance behind the mouse should the cat leap in order to land on the poor mouse?

    asked on November 4, 2015
  65. science

    What determines the carrying capacity of a particular population by an ecosystem? A.keystone species B.pioneer species C.limiting factors D.renewable resource

    asked on December 13, 2013

    A variable length air column (closed on one end) is placed just below a vibrating wire of mass 5.00g, which is fixed at both ends. The length of the air column is gradually increased from zero until the first position of resonance (first harmonic) is

    asked on February 11, 2015
  67. Physics

    A weightlifter raises a barbell of mass 150 kg from the floor to over his head 2.5 meters in 3 seconds. What is his average power input?

    asked on June 5, 2017
  68. Social studies

    How did workers in washington respond to economic and political changes in the state in the late 1800s and early 1900s

    asked on May 18, 2019
  69. Algebra

    A conic section has the equation x2 + y2 + 10x + 8y = 40. Determine the following: type of conic, domain and range, axes of symmetry, and center. Show your work.

    asked on December 15, 2016
  70. Chemistry

    calculate the ph of titration of 50.0 ml of 0.140 m hclo (aq)

    asked on April 7, 2013
  71. English

    I was wondering if you could help me find literary devices in this passage in "Othello" by Shakespeare: Desdemona: "My noble father, I do perceive here a divided duty: To you I am bound for life and education; My life and education both do learn me How to

    asked on December 4, 2009
  72. Math

    Find the ​total amount paid​ on a 30-­year mortgage for $53,000 with an interest rate of 4.25%.

    asked on June 26, 2019
  73. Chemistry

    How many g of CaCl2 are required to prepare 0.250 L of a 0.200 M solution?

    asked on December 13, 2015
  74. Chemistry

    Use molar volume to solve the following problems at STP. Find the volume mL occupied by 0.400 mole He. Find the number of grams of neon contained in 10.2 L Ne gas

    asked on May 17, 2010
  75. Physics

    a 57.0 kg person on a rollercoaster moving through the bottom of a curved track of radius 42.7 m feels a normal force of 995 N how fast is the car moving

    asked on June 13, 2019
  76. algebra

    A package is dropped from a helicopter at 1600 feet. The height of the package can be modeled by: h = -16t squared + 1600 , where h is the height of the package in feet and t is the time in seconds. How long will it take for the package to hit the ground?

    asked on April 13, 2015
  77. Geometry

    I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side.I have connected the center of the circle with point E on the edge of the circle with a radius. I

    asked on June 3, 2009
  78. English

    What is the effect of using the first person in a modest proposal by Jonathan Swift

    asked on August 9, 2019
  79. chemistry

    For the reaction N2(g) + 3H2(g) 2NH3(g), what will happen if more ammonia gas is added?

    asked on February 3, 2016
  80. Physics

    A vertical spring with a spring constant of 400 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 2.3 cm in bringing the

    asked on January 30, 2013
  81. physics

    A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a fundamental frequency of 74 Hz? Answer in units of m.

    asked on April 1, 2010
  82. Algebra

    1. Find all the real square roots of a. .0064 b. - .0081

    asked on March 5, 2017
  83. math

    For a popular Broadway musical, the theater box office sold 356 tickets at $80 apiece, 275 tickets at $60 apiece, and 369 tickets at $45 apiece. How much money did the box office take in? A. $16,605 B. $44,980 C. $61,585 D. $16,500

    asked on March 8, 2016
  84. Geometry

    Point J is between H and K on line segment HK. use th given information to write an equation in terms of x. Solve the equation. Then find HJ and JK. HJ=(x/4) JK= 3x - 4 KH = 22

    asked on September 1, 2014
  85. Algebra

    What is the equation, in standard form, of a parabola that models the values in the table x (-2,0,4) F(x) (2.5,1.5,-60.5)

    asked on January 10, 2017
  86. Pre-Cal

    A person flying a kite holds the string 4 feet above ground level. The string of the kite is taut and makes an angle of 60 degrees with the horizontal. Approximate the height of the kite above level ground if 500 feet of string is payed out.

    asked on July 17, 2010
  87. math

    Suppose a jar contains 5 red marbles and 33 blue marbles. If you reach in the jar and pull out 2 marbles at random without replacement, find the probability that both are red.

    asked on April 22, 2010
  88. math

    What are the important variables in the problem below? A test is worth 50 points. Multiple-choice questions are worth 1 point, and short-answer questions are worth 3 points. If the test has 20 questions, how many multiple-choice questions are there?

    asked on September 28, 2015
  89. Introduction to small engines

    The distance the piston must travel from TDC to BDC is referred to as the of the engine

    asked on February 22, 2017
  90. Physics

    A football player carrying the ball runs straight ahead at the line of scrimmage and directly into a wall of defensive linemen. The ball carrier has an initial speed of 8.48 m/s and is stopped in a time interval of 0.186 s. Find the magnitude and direction

    asked on January 26, 2012
  91. math

    Chad buys peanuts in 2 pound bags. He repackages them into bags that hold 5/6 pound of peanuts. How many 2 pound bags of peanuts should Chad buy so that he can fill the 5/6 pound bags without having any peanuts left over? What are the steps to find the

    asked on May 21, 2013
  92. Chemistry

    A 20.0 ml sample of an unknown HCl solution requires titration with 15.0ml of 0.1MNaOH solution to reach equivalent point. What is the concentration of the HCl solution? HCl + NaOH ¨ H2O + NaCl A. 0.000075 B. 75 C. none of these D. 0.075

    asked on March 5, 2011
  93. Physics

    A cyclist starts at the top of a straight slope with an initial velocity of 3.02 m/s. Five seconds later, she is at the bottom of the incline, having traveled 49.6 m. Find her velocity at the bottom of the hill and her acceleration, assuming it to be

    asked on January 26, 2012
  94. Physics

    A model airplane of mass 0.9 kg is attached to a horizontal string and flies in a horizontal circle of radius 5.2 m, making 1.2 revolutions every 8 s. (The weight of the plane is balanced by the upward “lift” force of the air on the wings of the

    asked on December 21, 2010
  95. Geometry

    I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side.I have connected the center of the circle with point E on the edge of the circle with a radius. I

    asked on June 3, 2009
  96. Chemistry

    Describe how lead(II) iodide cen be prepared in the laboratory

    asked on August 2, 2016
  97. Algebra

    Start from 110 feet away, a person on a scooter rides towards a checkpoint and then passes it. At what times is the scooter 40 feet away from the checkpoint? My answer is 2.3 to 4.6 seconds

    asked on October 4, 2014
  98. physics

    A block of wood with a mass of 1300g is sitting on a horizontal tabletop. The coefficient of kinetic friction between the block and table is µk=0.74.A rifle bullet with a mass of 39g is fired horizontally into the block at a sped of 290m/s and stops

    asked on February 19, 2015
  99. Algebra

    Suppose U = 1,2,3,4,5,6,7,8 is the universal set and P = 1,3,5,7, What is P? My answer is 1,3,5,7

    asked on October 4, 2014
  100. physics

    A 1500 kg car moving at 10 m/s is stopped by the action of its brakes. The work done by the car's brakes is ____ Joules.

    asked on March 28, 2011


  1. 1
  2. 2
  3. 3
  4. 4