noah

Most popular questions and responses by noah
  1. Social studies

    “What kind of arrangement is agreed to in this contract?”

    asked on March 12, 2018
  2. algebra

    using substitution how to solve x + 4y = 8 2x + 5y = 29

    asked on December 3, 2012
  3. physic

    Superman must stop a 120km/h train in 150m to keep it from hitting a stalled car on the tracks.If the train's mass is 3.6x10^5kg,how much force must he exert?Compare to the weight of the train (give as%).How much force does the train exerts on Superman?

    asked on July 2, 2011
  4. history

    Which pull factor would most likely encourage an immigrant who wanted to raise and sell cattle in the United States A)industrial jobs B)inexpensive land C)the promise of freedon D)expensive land in home country

    asked on April 3, 2018
  5. Physics

    1)We consider a hot-air balloon of mass 251 kg (basket and envelope). The spherical envelope of the balloon has a diameter of 19 m when fully inflated. To what temperature (in °C) must the enclosed air be heated for the balloon to carry five standard men?

    asked on December 2, 2016
  6. history

    Explain why Lincoln's assassination put the future of the nation in question.

    asked on March 12, 2018
  7. science

    the neuron that transmit the signal to your foot to kick a soccer ball are called reflexes motor neurons sensory neurons interneurons

    asked on September 24, 2014
  8. Business Statistics

    Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and prepreview ads before the movie starts. Many complain that the time devoted to previews is too long (The Wall Street Journal,

    asked on October 22, 2014
  9. Chemistry

    If the density of ethyl alcohol is 0.789 g/mL, how many quarts can be produced by the fermentation of 100.0 lb of sugar?

    asked on November 3, 2014
  10. Chemistry

    Consider the following description of a voltaic cell: A 1.0 M solution of Ni(NO3)2 is placed in a beaker with a strip of nickel metal. A 1.0 M solution of SnSO4 is placed in a second beaker with a strip of Sn. The two beakers are connected byba salt bridge

    asked on April 12, 2015
  11. PreChem

    Classify each of the reactions. precipitation, acid-base neutralization, redox C2H4(g)+3O2(g)----> 2CO2(g)+2H2O(l) Cu(s)+FeCl2(aq)---->Fe(s)+CuCl2(aq) HI(aq)+LiOH(aq)---->H2O(l)+LiI(aq)

    asked on June 18, 2015
  12. Biology

    How did Mendel's novel approach contribute to his success in describing how traits are inherited?

    asked on February 1, 2008
  13. physics

    A 0.67 kg rock is projected from the edge of the top of a building with an initial velocity of 11.6 m/s at an angle 52 ◦ above the horizontal. Due to gravity, the rock strikes the ground at a horizontal distance of 19.5 m from the base of the building.

    asked on September 2, 2012
  14. science

    the neuron that transmit the signal to your foot to kick a soccer ball are called reflexes motor neurons sensory neurons interneurons

    asked on September 24, 2014
  15. algebra

    Complete the table below to solve the equation 2.5x − 10.5 = 64(0.5x). x f(x) = 2.5x − 10.5 g(x) = 64(0.5x) 2 3 4 5 6

    asked on December 7, 2015
  16. physics

    A 605-kg racing car completes one lap in 14.3 s around a circular track with a radius of 40.0 m. The car moves at constant speed. (a) What is the acceleration of the car? (b) What force must the track exert on the tires to produce this acceleration?

    asked on December 7, 2012
  17. physics

    A cannon fires a 0.639 kg shell with initial velocity vi = 10 m/s in the direction θ = 55 ◦ above the horizontal. The shell’s trajectory curves downward because of gravity, so at the time t = 0.217 s the shell is below the straight line by some

    asked on September 2, 2012
  18. college physic SHM

    A 1.25kg mass stretches a vertical spring 0.215m.If the spring is stretches an additional 0.130m and released, (a)how long does it take to reach the equilibrium position again? (b)Write an equation giving its position y as a function of time t. (c)What

    asked on July 26, 2011
  19. physic

    Superman must stop a 120km/h train in 150m to keep it from hitting a stalled car on the tracks.If the train's mass is 3.6x10^5kg,how much force must he exert?Compare to the weight of the train (give as%).How much force does the train exerts on Superman?

    asked on July 2, 2011
  20. Physics

    A rocket that weighs 7840 N on earth is fired. The force of propulsion is + 10 440N. Determine a) the mass of the rocket, b) the acceleration of the rocket, c) the velocity of the rocket at the end of 8.0 s.

    asked on September 26, 2017
  21. college physic

    Determine a formula for the change in surface area of a uniform solid sphere of radius r if its coefficient of linear expansion is alpha A (assume constant) and its temperature is changed by Delta T.Assume the temperature chan ge is not large, Delta T^2 ~

    asked on February 7, 2012
  22. chem 2

    a buffer is to be prepared by adding solid sodium acetate to 0.10M CH3COOH. Which othe following concentrations of sodium acetate will produce the most effective buffer? A. 3.0M CH3COONa B 2.5M CH3COONa C 2.0M CH3COONa D 1.5M CH3COONa E .30M CH3COONa HELP

    asked on March 3, 2012
  23. Chemistry

    Ammonia (NH3) react with oxygen (O2) to produce nitrogen monoxide (NO) and water (H2O). Write and balance the chemical equation. How many liter of NO are produced when 2.0 liters of oxygen reacts with ammonia?

    asked on December 10, 2018
  24. algebra

    Rearrange the formula KE = 1/2 mv^2 for m

    asked on October 3, 2017
  25. 4th grade

    Teresa has 4 flower pots in 4 different designs. How many different ways(positions) can she display her flowers?

    asked on September 22, 2009
  26. geography

    what will be the loca time in nigeria longitude 15 degree east,when it is 5.00pm in ethiopia,longitude 45 degree east.

    asked on February 17, 2019
  27. Physics

    An organ pipe that is open a t both ends has a fundamental frequency of 382 Hz. What is the length of an closed end pipe that has a fundamental frequency exactly one octave higher? Report your answer in m.

    asked on May 3, 2016
  28. AP Physics

    To test the performance of its tires, a car travels along a perfectly flat (no banking) circular track of radius 120 m. The car increases its speed at uniform rate of at ≡ d |v| dt = 2.99 m/s 2 until the tires start to skid. If the tires start to skid

    asked on October 24, 2012
  29. AP Physics

    A baseball is thrown at an angle of 25 ◦ relative to the ground at a speed of 27.6 m/s. The ball is caught 59.4844 m from the thrower. The acceleration due to gravity is 9.81 m/s 2 . How long is it in the air? Answer in units of s

    asked on September 10, 2012
  30. PHYSICS

    Assume: A 78 g basketball is launched at an angle of 46.7 ◦ and a distance of 18.6 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal’s height. A basketball player tries to make a long jump-shot as

    asked on September 2, 2012
  31. History

    I need help describing the social, economic, and political composition of the decade of corporate greed and how it affected the political climate of the 1980s. What does the question refer to when it mentions political climate?

    asked on July 27, 2008
  32. Math

    Write the ratio in simplest form. 50:10 A.25:5 B.10:2 C. 5:1 D.1:5 Is the answer C?

    asked on October 28, 2016
  33. Half-Life

    Uranium-238 decays to Lead-206. The half life of Uranium-238 is 4.5 billion years. If you have a 100 g sample. How much sample will you have after 2 half lifes?

    asked on February 19, 2012
  34. Math

    The line 2x+3y=1 intersects the curve x(x+y)=10 at A and B. Calculate the coordinates of A and B.

    asked on May 23, 2011
  35. Chemistry

    2Na + 2H2O = 2NaOH + H2 Calculat the moles and volume of hydrogen produced when 0.2 moles of sodium reacts with excess water.

    asked on May 29, 2011
  36. college physic

    A stunt driver wants to make his car jump over 8 cars parked side by side below a horizontal ramp.(a)With what minimum speed must he drive off the horiontal ramp?The vertical height of the ramp is 1.5m above the cars and the horizontal distance must be

    asked on June 23, 2011
  37. physics

    The shell’s trajectory curves downward because of gravity, so at the time t = 0.217 s the shell is below the straight line by some vertical distance ∆h. Find this distance ∆h in the absence of air resistance. The acceleration of gravity is 9.8 m/s 2

    asked on September 2, 2012
  38. physics

    A man with a mass of 58 kg stands up in a 69-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How

    asked on October 8, 2012
  39. math

    The data in the table illustrates a linear function. x, -3,0,3,6, y, -6,-2,2,6

    asked on May 30, 2018
  40. math

    two forces, one of 35 pounds and the other 62 pounds, act upon the same object. The angle between these forces is 25 degrees. Find the magnitude of the resultant force.

    asked on October 29, 2012
  41. college physic

    A stunt driver wants to make his car jump over 8 cars parked side by side below a horizontal ramp.(a)With what minimum speed must he drive off the horiontal ramp?The vertical height of the ramp is 1.5m above the cars and the horizontal distance must be

    asked on June 23, 2011
  42. Physics

    Find the de broglie wavelength of a 1500-kg car when its speed is 80 km/h. How significant are the wave properties of this car likely to be?

    asked on November 2, 2017
  43. physics

    How much potential energy does DeAnna with a mass 57.0 kg, gain when he climbs a gymnasium rope a distance of 3.7 m?

    asked on January 10, 2013
  44. Daily Language Review

    there family has went to yellowstone national park This is the sentence that I have to correct and I keep getting it wrong. I need help.

    asked on September 3, 2010
  45. math

    Simplify 4!

    asked on May 7, 2018
  46. physic

    A person stands on a bathroom scale in a motionless elevator begins to move,the scale briefly reads only 0.75 of th person regular weight(means Fn=0.75mg).Calculate the acceleration of the elevator,and find the direction of acceleration.

    asked on July 10, 2011
  47. Math

    A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they spent traveling to campus. This variable, travel time, was then

    asked on March 26, 2018
  48. Chemistry

    I know this is pretty general, but it is the question. What can you say about the energy spread of the radiation emitted by an atomic gas?

    asked on May 15, 2016
  49. Psychics

    a ball is projected horizontally from the edge of a table that is 2.00m high and it strikes the floor at 2.40m from the base of the table. what is the initial speed of the ball

    asked on November 16, 2015
  50. physics

    hummingbirds beat their wings 1500 times in 30seconds calculate frequency and the period

    asked on January 12, 2015
  51. 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 on December 11, 2012
  52. physics

    A hockey puck has a mass of 0.118 kg and is at rest. A hockey player makes a shot, exerting a constant force of 28.0 N on the puck for 0.16 s. With what speed does it head toward the goal?

    asked on December 11, 2012
  53. Chemistry

    when electricity is passed through water, the water decomposes into hydrogen gas and oxygen gas. when 10.00 kg of water were decomposed this way, 5788 l of oxygen gas were produced at 25 degrees celsius and 1 atm pressure. what is the percent yield of

    asked on November 21, 2014
  54. Chemistry

    What is the concentration of the SCN- ion in the stock solution of 2.00 x 10-3 M NaSCN in 0.10M HNO3?

    asked on March 7, 2012
  55. college physic

    A 1.25kg mass stretches a vertical spring 0.215m.If the spring is stretches an additional 0.130m and released, (a)how long does it take to reach the equilibrium position again? (b)Write an equation giving its position y as a function of time t. (c)What

    asked on July 26, 2011
  56. Biology

    Without the invention of the microscope, would the cell theory have been possible? I don't think it would have been possible because through technology, the microscope, cells were visible. Without the microscope how could scientists have seen cells or

    asked on January 14, 2008
  57. AP Physics

    A home run is hit such a way that the baseball just clears a wall 30 m high located 114 m from home plate. The ball is hit at an angle of 37 ◦ to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1 m above the

    asked on September 11, 2012
  58. college physic

    Liquid helium is stored at its boiling point temperature of 4.2K in a shperical container(r=0.30m).The container is a perfect blackbody radiator.The container is surrounede by a sherical shield whose temperature is 77k.A vacuum exists in the space between

    asked on February 22, 2012
  59. college physic

    Two identical thermometers made of pyrex glass contain,respectively identical volumes of mercury and methyl alcohol.If the expansion of the glass is taken into account,how many times greater is the distance between the degree marks on the methyl alcohol

    asked on February 7, 2012
  60. Chemistry

    Calculate the number of mL of hydrogen gas at 27 degrees Celsius and 640 Torr produced by the reaction of 0.520 grams of magnesium with excess hydrochloric acid.

    asked on February 5, 2012
  61. Math

    A 605-kg racing car completes one lap in 14.3 s around a circular track with a radius of 40.0 m. The car moves at constant speed. a) What is the acceleration of the car? (b) What force must the track exert on the tires to produce this acceleration?

    asked on December 3, 2012
  62. math

    Nico is saving money for his college education. He invest some money at 5%, and $1600 less than that amount at 3%. The investments produced a total of $144 interest in 1yr. How much did he invest at each rate?

    asked on February 20, 2018
  63. geometry

    I have no clue to this. Please help. Line segment CD has endpoints with coordinates (1,2) and (9,6). What is the location for point E so that E divides CD into the ratio 3:1?

    asked on November 7, 2016
  64. Physics

    Small rockets are used to make tiny adjustments in the speeds of satellites. One such rocket has a thrust of 35 N. If it is fired to change the velocity of a 72100 kg spacecraft by 63 cm/s, how long should it be fired?

    asked on December 19, 2012
  65. Physics

    An airplane flies due south at 185 km/h relative to the air. There is a wind blowing at 68 km/h to the east relative to the ground. What are the plane's speed and direction relative to the ground?

    asked on December 3, 2012
  66. AP Physics

    A quarterback throws the football to a stationary receiver who is 15.2 m down the field. The football is thrown at an initial angle of 42 ◦ to the ground. The acceleration of gravity is 9.81 m/s 2 . a) At what initial speed must the quarterback throw

    asked on September 5, 2012
  67. pronouns

    How is the pronoun in bold letters used? you can have the job if you know how to type. A.subject B.Direct object C.predicate nominative

    asked on May 7, 2019
  68. math

    Which number can be added to a rational number to explain that the sum of two rational numbers is rational? a: pi b: 3 7/8 c: square root of 8 d: square root of 47

    asked on October 3, 2017
  69. college physic

    A solid cylindrical rod made from a center cylinder of lead and an outer concentric jacket of copper.Except for its ends,the rod is insulated,so that the loss of heat from the curved surface is negligible.When a temperature difference is maintained between

    asked on February 22, 2012
  70. History

    Could someone review and correct my answers please. I need to decide if each item was an initiative only within Kennedy’s New Frontier, if it was proposed by both presidents, or if it was an initiative only within Johnson’s Great Society. 1. Head Start

    asked on July 4, 2008
  71. History

    Can someone explain this question to me and help me find some sites. I'm a little lost. Describe the connection between student unrest and the Vietnam War, noting how each affected the other. Explain the political and social outcomes of the end of the

    asked on July 13, 2008
  72. Math

    The art teacher bought some boxes of colored pencils with 7 pencils in each box. She bought a total of 28 pencils. Write an equation that you could use to find how many boxes the art teacher bought.

    asked on September 5, 2018
  73. health

    hat is physical stress? A. A physical reaction of the body to various triggers B. A physical reaction of the mind to various triggers C. A physical reaction of the soul to various triggers D. A physical reaction to the heart to various triggers i think its

    asked on February 7, 2013
  74. physics

    A 2.2 kg rock initially at rest loses 412 J of potential energy while falling to the ground. Assume that air resistance is negligible. Calculate the kinetic energy that the rock gains while falling. What is the rock's speed just before it strikes the

    asked on January 10, 2013
  75. Calculus

    My question is with a multi-part homework assignment that we got in class. The information given is : A factory manufactures widgets. The rate of production of widgets after t weeks is widgets/ week. The equation for this is dx/dt=30(1-(20/((t+20)^2))).

    asked on February 7, 2017
  76. Math

    What shape has 21 faces and 14 vertices

    asked on March 6, 2016
  77. math

    Two people start from the same point. One walks east at 4 mi/h and the other walks northeast at 3 mi/h. How fast is the distance between the people changing after 15 minutes? (Round your answer to three decimal places.)

    asked on March 1, 2015
  78. 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 on December 19, 2012
  79. AP Physics

    A bullet of mass 0.0022 kg moving at 568 m/s impacts a large fixed block of wood and travels 5.2 cm before coming to rest. Assuming that the deceleration of the bullet is constant, find the force exerted by the wood on the bullet. Answer in units of kN

    asked on October 2, 2012
  80. Math 4

    Teresa has 4 flowers, 4 designs. How many ways can she display/mix them up. Thank you ....but 4x4 seems too simple. If I line up abcd, bcda,cdab, etc...... (Naming each design abcd) ??? is it possibley more?

    asked on September 22, 2009
  81. Algebra

    Can someone please check my answers. 1. Solve. –7x + 1 + 8x = x + 1 A) Identity B) No solution C) 1 D) 0 My answer: A) Identity 2.The length of one of the equal legs of an isosceles triangle is 8 cm less than 4 times the length of the base. If the

    asked on April 21, 2007
  82. Math

    How many squares with sides that are 6 inches long are needed to cover a square with a side length of 30 inches without overlaping?

    asked on October 12, 2017
  83. math

    Beth leaves her home on her bike, traveling down a long country road, at the rate of 8 mph. Her brother, Brandon, left 15 minutes after Beth on his golf cart along the same country road, traveling 12 mph. How long will it take Brandon to catch up with

    asked on September 11, 2017
  84. geometry

    Help!!! Line segment EF in the xy-coordinate plane has endpoints with coordinates (-4,9) and (6,4). What are two possible locations for point G so that G divides EF into two parts with lengths in a ratio of 1:4?

    asked on November 8, 2016
  85. physics

    What is the maximum current allowed in a 7.5 W, 300 resistor?

    asked on April 12, 2013
  86. physics

    A sonar signal of frequency 1.00 106 Hz has a wavelength of 1.40 mm in water. (a) What is the speed of the signal in water? (b) What is its period in water? (c) What is its period in air?

    asked on February 1, 2013
  87. Algebra

    1.In this problem, we will analyze the profit found for sales of decorative tiles. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product depending on how much of that product is available on the open

    asked on January 20, 2008
  88. social studies

    did germany take over sweden in WW2

    asked on April 14, 2013
  89. helath

    If you’ve decided to lose weight then ________. A. Even modest weight loss can lead to big health benefits B. Modest weight loss can lead to little health benefits C. Large weight loss can lead to little health benefits D. Little weight loss can lead to

    asked on February 7, 2013
  90. Math

    if jan has 7 stickers and her brother gives her 6 more how many does she have in total? which double fact can you use to figure out how many stickers she has

    asked on January 30, 2013
  91. math

    You have 60 red socks and 30 blue socks unpaired in a drawer. You can not see the socks, they are in a drawer and it is dark. What is the minimum number of socks that you have to pull out before you have a matching pair?

    asked on January 24, 2013
  92. 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 on December 18, 2012
  93. math

    What fraction = .40625

    asked on December 7, 2012
  94. Physics

    A powerboat heads due northwest at 11 m/s relative to the water across a river that flows due north at 5.4 m/s. What is the velocity (both magnitude and direction) of the motorboat relative to the shore?

    asked on December 3, 2012
  95. AP PHYSICS

    A quarterback throws the football to a stationary receiver who is 15.2 m down the field. The football is thrown at an initial angle of 42◦ to the ground. The acceleration of gravity is 9.81 m/s 2 a) At what initial speed must the quarterback throw the

    asked on September 11, 2012
  96. physic

    a baseball pitcher throws a baseball with a speed of 4m/s.Estimate the average acceleration of the ball during the throwing motion.In throwing the baseball,the pitcher accelerates the ball through a displacement of about 3.5m,from behind the body to the

    asked on June 23, 2011
  97. language

    What is the complete predicate in the question: Did you know the ancient Greeks wrote many plays?

    asked on October 9, 2008
  98. Algebra

    How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions?

    asked on January 23, 2008
  99. Algebra

    I just need help with the number game part. I can't think of any kinds of games to come up with? Take any number (except for 1). Square that number and then subtract one. Divide by one less than your original number. Now subtract your original number. Did

    asked on January 21, 2008
  100. Algebra

    Consider the monomials 15 and 6 . a. Factor the monomials. b. What factors of these monomials are common factors? c. Find the greatest common factor of 15 and 6 .

    asked on September 6, 2018

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