1. math

    if A (2, -1) and B (4,7) are endpoints of a diameter of a circle, what is the area of the circle? a)16pi b) 17pi c) 18pi d)144pi e)1156pi Plot the two points and join 'em with a line. Now plot another point C (4, -1). And then simply run a line from B down
  2. biology

    How does the pressure reading of water vapor differ from that of a gas like oxygen or nitrogen? is it because its fractional while oxygen and nitrogen is functional?
  3. math

    your school is raffling off a TV set and a total of 750 tickets were sold. you sold 75 tickets to your family. what fractional value did you sell?
  4. math/115

    One kilometer is equal to 1,000 meters. What fractional part of a kilometer is 700 meters? Simplify your result.
  5. fractional division

    A bee gathered nectar for 3/4 of an hour it returned to the hive every 1/12th hour. How many trips did the bee make.
  6. science

    what are the characteristics of a chemical change? New substances are formed. This is often accompanied by heat, light, change in appearance (though physical changes also can change in appearance)or color.
  7. Science

    All of the following are indicators of a chemical change except: heat production color change phase change ** bubbling or fizzing A lot of people are saying color change, however in my lesson it says a chemical change has indicators like: Color change
  8. Science

    What did Antoine Lavoisier’s experiments demonstrate? a- Atoms always split into pairs during a chemical change. b- Mass is neither lost nor gained during a chemical change. c- Matter can be created during a chemical change. d- Energy is neither lost nor
  9. math

    Estimate 16 20/21*28 3/7 - 4 13/25 + 8 2/47 as a whole number or as a mixed number whee the fractional part is 1/2. a. 452 b.480 c.488 d.492 1/2 I would say the answer is c - 488. Would that be right?
  10. Math

    The function f(x) = x^2 -2x + x^1/2 is: A. A polynomial because it is continuous. B. A polynomial because it is of the form axn. C. Not a polynomial because you are subtracting 2x. D. Not a polynomial because you can’t have any fractional exponents. Is
  11. Physics

    A bike wheels rotate 4 revolutions. How radiant has it rotates?
  12. Physics

    If a clock says 10:30 am and the second hand rotates 960 degrees what time would it be?
  13. Maths IX

    The mass of a solid sphere of metal 5cm in diameter is 6.25 kg. Find the mass of a spherical shell of same metal, the external diameter being 10cm and thickness 1 cm.
  14. University Physics

    A hollow copper wire with an inner diameter of 0.60mm and an outer diameter of 1.8mm carries a current of 15A. What is the current density in the wire?
  15. math

    earth diameter is 13000 kilometers, globe diameter of0.5 meter, what is the globes scale as a ratio. What distance on Earth would 1 cm on the globe represent?
  16. Physics

    Piston Circle 1 in the figure below has a diameter of 0.29 in.; Piston Circle 2 has a diameter of 1.7 in. In the absence of friction, determine the force vector F necessary to support the 500-lb weight.
  17. calculus

    if a snowball melts so that its surface area decreases at a rate of 1 cm^2/min, find the rate at which the diameter decreases when the diameter is 43cm. Leave pi in your answer please.
  18. Calculus 1

    Related Rates: If a snowball melts so that its surface area decreases at a rate of 6 cm2/min, find the rate at which the diameter decreases when the diameter is 11 cm.
  19. Geometry

    The outside diameter of a pipe is 5 cm. The inside diameter is 4 cm. The pipe is 4 meters long. What is the volume of the material used for this length of pipe?Round your answer to the nearest cubic centimeter. (Hint: be sure that all units are in
  20. science

    a hydrauli press has a ram of 30 cm diameter and plunger of 4.5cm diameter. find the the weight lifted by the hydraulic press when the force applied at the plunger is 500N
  21. physics

    Piston circled 1 in the figure below has a diameter of 0.28 in.; Piston circled 2 has a diameter of 1.6 in. In the absence of friction, determine the force vector F necessary to support the 500-lb weight. in lb i got 1.53 lb but it is incorrect
  22. Math

    1. Use 3.14 for pie to estimate the area of a circle. The diameter is given. Round your answer to the nearest hundredth if necessary. (the diameter is 16.8) 2. Find the missing length. Round to the nearest tenth, if necessary. (7,19)
  23. physics please help

    What is the resistance of 125 m of aluminum wire that has a diameter of 0.8118 mm? The resistivity of aluminum is 2.824 x 10^-8 (omega) m. I need help with the set up. we've been using R = V/I, but haven't had anything with resistivity. I don't know where
  24. Physics 1

    A disk rotates with constant angular acceleration. The initial angular speed of the disk is 2π rad/s. After the disk rotates through 17π radians, the angular speed is 18π rad/s. (a) What is the magnitude of the angular acceleration? answer
  25. physics

    The steering wheel of a car has a radius of 0.18 m, while the steering wheel of a truck has a radius of 0.25 m. The same force is applied in the same direction to each. What is the ratio of the torque produced by this force in the truck to the torque
  26. physics

    When exposed to sunlight, a hole in a sheet of copper expands in diameter by 0.154% compared to its diameter at 74∘F. Part A What is the Celsius temperature of the copper sheet in the sun?
  27. Math

    a movie theater Is considering two different sized containers for its popcorn. One option is a cone shaped cup that has a diameter of 10 cm and a height of 6 cm. The other option is a cylinder that has a diameter of 8 cm and a height of 12 cm. what
  28. Math

    a movie theater Is considering two different sized containers for its popcorn. One option is a cone shaped cup that has a diameter of 10 cm and a height of 6 cm. The other option is a cylinder that has a diameter of 8 cm and a height of 12 cm. what
  29. Geometry

    A spherical storage tank has a diameter of 48 ft and is full of water. How many delivery trucks with cylindrical tanks measuring 8 ft in diameter and 10 ft long can be completely filled from the storage tank?
  30. Geometry

    You place a steel ball with diameter 4cm in a water-filled cylinder that is 5cm in diameter and 10cm high. What volume of water will spill out of the cylinder? I'm lost....
  31. physics help please!!!

    A venturi tube is measuring the flow of water; it has a main diameter of 4.1 cm tapering down to a throat diameter of 1.8 cm. If the pressure difference is measured to be 67 mm-Hg, what is the velocity of the water? Please help step by step!!!
  32. physics

    a hollow spherical iron shell floats just completely submerged in water.the outer diameter is 50 cm and the density of iron is 7.9cm cubed .find he inner diameter of the shell
  33. Radians

    The angular speed of a large pulley wheel that has a radius of 15, is 50 revolutions/min. Find the angular speed and the rim speed of the smaller wheel that has a radius of 5. The rim speed is going to be the same. I got the angular speed but I can't
  34. MATHS MONGU COLLEGE

    A cylinder whose volume is 386,000m3 has it's length 1.3 times its diameter. calculate the diameter of the cylinder given that the volume V = 3.142r2h.
  35. Physics

    how much torque does it take to turn a rotor that is 12" diameter and weights around 200lbs that seats on bearings. a 2" diameter shaft that through the center of the rotor that is on center. don
  36. MATHS

    A cylindrical water tank of diameter 1.4m and height 2.1m is being feed by a pipe of diameter 3.5cm through which water follows at the rate of 2m/per second . In how much time the tank will be filled ???
  37. Algebra

    The diameter of a circular pizza pan is 16 inches. What is the area, to the nearest tenth, of the pan? pi*r2 = area r = diameter/2 201.1 in. squared looks good to me.
  38. calculus

    A spherical balloon is inflated so that its volume is increasing at the rate of 3.2 ft3/min. How rapidly is the diameter of the balloon increasing when the diameter is 1.1 feet?
  39. arithmetic

    if the internal diameter of a cylindrical iron piep is 2.8 cm . If the pipe is melted uniformly by 1 mm then it formed a cylindrical rod ,find the diameter of the new rod?
  40. Calculus

    A spherical balloon is inflated so that its volume is increasing at the rate of 3.2 ft3/min. How rapidly is the diameter of the balloon increasing when the diameter is 1.2 feet?
  41. math

    a map of the moon has a scale of 1cm:25km. On this map the diameter of the Copernicus crater is about 3.7 cm. To the nearest kilometer, what is the actual diameter of the crater?
  42. Chemistry

    True or False: The diameter of most atoms will be between 0.05 nm and 0.3 nm. I think its false (I don't think there even is an average diameter for atoms...), but I can't find any reliable sources to back up my hunch. Help please...
  43. physics

    A jeweler inspects a watch with a diameter of 3.6 cm by placing it 8.0 cm in front of a concave mirror of 12.6 cm focal length. (a) Where will the image of the watch appear? (b) What will be the diameter of the image?
  44. ALGEBRA

    I need to find a slope and y intercept of the line and write the fractional answers in lowest terms. 2y+8x+3=12+8x; I would like to try this one and get your input. 2y+8x-8x-12-3; 2y/2 = 9/2; y = 9/2 however I did not find the slope. I don't think there is
  45. math

    A cylinder has a diameter of 80 cm and a length of 45 cm. Another cylinder has the same volume but is 80cm long. What is the diameter of the longer cylinder?
  46. Earth

    1. If the Earth were the size of B-B (with a radius of about 0.2 centimete), how big would the Sun be? How big would the Milky Way be? 2. Imagine building a model of the Solar System on your campus. Work out the diameter and spacings of the planets in
  47. Chemistry

    During fractional distillation of ethanol/water mixture, why can't pure ethanol be obtained (i.e. distillated contains a little water)?
  48. chemistry

    there's a 5.44 g sample of NH4NO3 and 150 g sample of water. So they ask for the change in enthalpy in kJ/mol. They give the temperature change from 16.2 degrees C to 18.6 degrees C. They also provide the specific heat capacity of the entire solution
  49. chemistry

    there's a 5.44 g sample of NH4NO3 and 150 g sample of water. So they ask for the change in enthalpy in kJ/mol. They give the temperature change from 16.2 degrees C to 18.6 degrees C. They also provide the specific heat capacity of the entire solution
  50. science

    A force of 625 N is applied to a hydraulic jack piston that is 0.04 m in diameter. If the piston which supports the load has a diameter of 0.60 m, how much mass can be lifted by the jack? Ignore any difference in height between the pistons
  51. Scientific notation

    a microscope is set so it makes an object appear 4 x 10`2 times larger than its actual size. A virus as a diameter of 2 x10`-7 meter. ow Large will the diameter of te virus appear when it is viewed under te microscope?
  52. calculus

    If a snowball melts so that its surface area decreases at a rate of 3 cm2/min, find the rate at which the diameter decreases when the diameter is 9 cm. (Give your answer correct to 4 decimal places.)
  53. physics

    1.A round wooden log of diameter 73cm floats with half of its radius above water. Determine the log’s density 2.An ideal gas doubles its volume in one of three different ways: at constant pressure, at constant temperature, and adiabatically. For each
  54. chemistry

    the enthalpy change of a system is 1.25 x 10^5 J and the entropy change is 300 J/K. calculate the free energy change of the system at 290 K
  55. Science

    Which of the following is NOT a possible sign of a chemical change? (1 point) a change in state a change in color the release of a gas the release of energy
  56. calculus

    If a snowball melts so that its surface area decreases at a rate of 4 cm2/min, find the rate at which the diameter decreases when the diameter is 9 cm.
  57. MATH

    A BICYCLE TRAVELS WITH EACH TURN OF ITS WHEELS IS ABOUT 3 1/67 TIMES THE TIRE DIAMETER. iF THE TIRES HAVE A DIAMETER OF 24 1/2 INCHES, HOW FAR DOES IT TRAVEL WITH EACH TURN OF THE WHEELS
  58. calculus

    If a snowball melts so that its surface area decreases at a rate of 3 cm2/min, find the rate at which the diameter decreases when the diameter is 11 cm.
  59. Chemistry

    A bolt is ordered with a thread of a diameter of 1.25 inches, what is the diameter in millimeters? If the order was mistaken for 1.25 centimeter by how many millimeters would the bolt be in error?
  60. math

    The diameter of a pipe is normally distributed with a mean of 0.4 inches and a variance of 0.0004. What is the probability that the diameter of a randomly selected pipe will exceed 0.44 inches?
  61. Calculus

    If a snowball melts so that its surface area decreases at a rate of 4 cm2/min, find the rate at which the diameter decreases when the diameter is 12 cm.
  62. math

    The diameter of a pipe is normally distributed with a mean of 0.4 inches and a variance of 0.0004. What is the probability that the diameter of a randomly selected pipe will exceed 0.44 inches?
  63. Math

    5 2/3 - 5= 2/3. Use a division algorithm to find the quotient. State the final answer as a mixed number. Why is the fractional part of your quotient different from your answer in the original equation 5 2/3 - 5= 2/3?
  64. physics

    A solenoid is wound with a single layer of insulated copper wire of diameter 2.800 mm and has a diameter 5.000 cm and is 1.500 m long. Assume that the adjacent wires touch and that the insulation thickness negligible. what is the inductance per meter(H/m)
  65. physics

    A solenoid is wound with a single layer of insulated copper wire of diameter 2.800 mm and has a diameter 5.000 cm and is 1.500 m long. Assume that the adjacent wires touch and that the insulation thickness is negligible. what is the inductance per
  66. Physics

    A thin brass ring of inner diameter 10cm at 20degrees C is warmed and slipped over an aluminum rod of diameter 10.01cm at 20degrees C. Assuming the average coefficient of linear expansions are constant, to what temperature must this combination be cooled
  67. SCIENCE PLEASE HELP ASAP

    the African plate is moving toward the Eurasian plate at a rate few centimeters per year. how will this are change in 100 million years. in your answer consider how continents will change and how the Mediterranean see will change
  68. geometry

    Answer the following questions to determine why Euler’s formula continues to hold for the polyhedron formed by cutting corners off of an octahedron, as in Figure 11.35(b): a. For an octahedron V = , ____,F = ____, and E = _____. b. When you slice off one
  69. physics

    A stone is thrown into water pond forming 10 waves in 5 seconds. The diameter of the first crest is 13 m and the diameter of the last crest is 4m. Find a.the periodic time b.the frequency c.the wave length d.the wave velocity
  70. Sign Language

    Hi I would like for my answers to be checked for these two questions (Note: I'm not sure if the 2nd one is correct): 1. Several school-related words are based on which sign? a. book b. learn c. school d. study My Answer: book 2. How do you change a
  71. STAT

    The inside diameter of a manufactured cylinder is believed to follow a normal distribution centered at 5.00 inches with standard deviation of .03 inches. The diameter of the cylinder must be within 4.95 inches (the lower specification limit) and 5.07
  72. math-PLEASE HELP

    Answer the following questions to determine why Euler’s formula continues to hold for the polyhedron formed by cutting corners off of an octahedron, : a. For an octahedron V = , ____,F = ____, and E = _____. b. When you slice off one corner of the
  73. Math

    Determine which function has the greater rate of change 1.The rates of change are equal. 2.The graph has a greater rate of change. 3.The table has a greater rate of change. 4.none of the above file:///C:/Users/SCHOOL/Pictures/math.JPG HELP ME UNDERSTAND
  74. math 6th

    You make a large bowl of salad to share with your friends.Your brother eats 1/3 of it before they come.What fractional portion of the origanal bowl of salad does each friend receive
  75. math

    there are 80 fourth graders in school of these, 35 were boys. what fractional part of the fourth graders were girls
  76. science

    the African plate is moving toward the Eurasian plate at a rate of a few centimeters per year. how will this area change in 100 million years? in your answer, consider how continents will change and how the Mediterranean sea will change.
  77. Science

    The African plate is moving toward the Eurasian plate at a rate of a few centimeters per year. How will this area change in 100 million years? In your answer, consider how continents will change and how the Mediterranean Sea will change.
  78. SCIENCE

    the african plate is moving toward the eruasian plate at a rate of a few centimwtwes per year. how will this area change in 100 million years? in your answer, consider how continents will change and how the mediterranean sea will change
  79. Math

    Using 3.14 for pi, rounding to the nearest tenth, if necessary. A spherical storage tank has a diameter of 48 ft and is full of water. How many delivery trucks with cylindrical tanks measuring 8 ft in diameter and 10 ft long can be completly filled from
  80. physics

    In a Rutherford scattering experiment a target nucleus has a diameter of 1.4 10-14 m. The incoming has a mass of 6.64 10-27 kg. What is the kinetic energy of an particle that has a de Broglie wavelength equal to the diameter of the target nucleus? Ignore
  81. Physics

    A figure shows a section of a long tube that narrows near its open end to a diameter of 1.0 mm. Water at 20 degrees celsius flows out of the open end at 0.020 L/s. What is the gauge pressure at point P, where the diameter is 4.0 mm?
  82. physics

    A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe's diameter is 56.3 cm (0.563 m) and the flow speed of the petroleum is 13.5 m/s. At the refinery the petroleum flows at 5.65 m/s. What is the volume
  83. Calculus

    A spherical snowball is melting so that its diameter is decreasing at rate of 0.1 cm/min. At what is the rate is the volume of the snowball changing when the diameter is 12 cm?
  84. Cal

    If a snowball melts so that its surface area decreases at a rate of 3 cm^2/min, find the rate at which the diameter decreases when the diameter is 8 cm.
  85. Algebra

    The circumference of a circle is found by the formula C=pi(d) where d is the diameter of the circle. Does circumference vary directly as diameter? If so what is the constant of variation
  86. Physics II

    the velocity of water in a 4 cm diameter pipe is 2.0m/s.what is the velocity in a 2cm diameter pipe which connects with it,both pipes flowing full?
  87. Physics please help!!

    A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?
  88. English

    Identify the conjunction Earth rotates on its axis and revolves around the sun.
  89. physics

    A 5.0-g CD with a radius of 6.0 cm rotates with an angular speed of 20 rad/s. What is its kinetic energy?
  90. Math

    A clock starts at 12:59. What time is it after the minute hand rotates 24 degrees?
  91. physics

    A tire rotates 140 rpm, how many rotations have been completed in 20 seconds?
  92. physics

    A 5.0-g CD with a radius of 6.0 cm rotates with an angular speed of 20 rad/s. What is its kinetic energy?
  93. Physics

    What angle should you rotate a mirror so that a reflected ray rotates through 28 degrees. I got 20, but i am not sure, please help
  94. Physics please help!!

    A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?
  95. Physics please help!!

    A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?
  96. Math

    What is the degree measure of the angle through which the hour hand on a clock rotates from 4:00 pm to 8:00 pm?
  97. physics

    Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·10^8 N/m2 physics - bobpursley, Saturday, October 29, 2011 at 10:32am Hookes
  98. Math

    file:///C:/Users/SCHOOL/Pictures/math.JPG Determine which function has the greater rate of change 1.The rates of change are equal. 2.The graph has a greater rate of change. 3.The table has a greater rate of change.*** 4.none of the above Is this right?
  99. physics EM

    Ive tried multiple answers but cant get it right. Which of the following changes would induce an electromotive force (emf) in the loop? When you consider each option, assume that no other changes occur. a. The magnitude of B_vec increases. b. The magnitude
  100. chemistry

    I originally used 1 gram of NaOH. What if I used 2 grams of NaOH. Would that change the heat evolved, Q and change in ethalpy, (delta)H? Through direct calculation, I see that the Q change by only about 0.1 kcal, but for (delta)H, I see that the value