1. Physics

    A circular dam has a radius of 10.0 m and a height of 3.0 m. Of the dam will be filled with water from a pipe with an inside diameter of 10 cm and a water flow of 10 litres per second, calculate the time taken to fill the dam to a point 10 cm from the top
  2. physics

    A bicycle has wheels with a diameter of 0.630 m. It accelerates uniformly and the rate of rotation of its wheels increases from 197 rpm to 300 rpm in a time of 22.5 s. Find the linear acceleration of the bicycle
  3. geometry

    A company packages it's cereal in a rectangular prism that is 2.5 inches by 7 inches by 12 inches. It is considering packaging it in a cylinder- shaped container having a 6 inch diameter and a height of 7.5 inches. Which used the least amount of packaging?
  4. Maths

    Hi im doing measurement at skool at the moment and i cant quite ork out some questions. Can someone please help!! A circular portrait photograph has a diameter 18cm and is to be placed in a 20cm square frame. Determine the ratio of the area of the
  5. Maths

    Hi im doing measurement at skool at the moment and i cant quite ork out some questions. Can someone please help!!!! A circular portrait photograph has a diameter 18cm and is to be placed in a 20cm square frame. Determine the ratio of the area of the
  6. College Physics

    A 2.0 m diameter merry-go-round is initially turning with a 4.2 s period. It slows and stops in 22.0 seconds. Before slowing, what is the speed (in m/s) of a child on the rim? How many revolutions does the merry-go-round make as it stops?
  7. Math

    A paper cone has a base diameter of 8cm and a height of 3cm(a) use Pythagoras theorem to calculate it's slant height (b)if the cone is cut and opened out into the sector of a circle what is the angel of the sector
  8. Math

    billys bike has wheels of diameter 70 cm he invented a counter for his bike which counts the number of revolutions the wheels make one day the county shows 350 revolutions how far has Billy cycled
  9. Math

    an arch of a bridge is made by bending a steel beam into the shape of a semi circle, if the span (diameter) of the arch is 20m, use the value 3.14 for π to find the length of the steel beam to the nearest meter
  10. Physics

    A car starts from rest and accelerates uniformly to a speed of 50km/h in 18s. If the wheels of the car are 70cm in diameter. Calculate; a.The final angular velocity of the wheels b.angular acceleration
  11. math

    twelve cans, each 6.6 cm in diameter are packed into a carton. what is the efficiency of this package; that is, what percent of the total base area of the carton is covered by the cans? (use the formula A = πr^2 to calculate the area of a circle)
  12. PHYSICS

    Problem 19.33 Two light bulbs are 1.5 m apart. From what distance can these light bulbs be marginally resolved by a small telescope with a 4.0 cm-diameter objective lens? Assume that the lens is limited only by diffraction and lambda = 600 nm.
  13. Physics

    A small block of mass m = 194 g is released from rest at point A , along the horizontal diameter on the inside of a hemispherical bowl of radius R = 29.5 cm, and the surface of the bowl is rough. The block's speed at point B is 1.56 m/s.
  14. Physics

    An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an automobile of mass 850Kg traveling initially at a speed of 43.0 km/h in a distance equal to the diameter of a dime, which is
  15. Science

    The cirucumference of a ballon is 75 inches and the diameter is 12 inches what is the volume? Science - Ms. Sue, Saturday, February 18, 2012 at 9:54pm Thank you. volume = 4/3 ð r3 V = (4/3) * 3.14 * 6^3 V = (4/3) * 3.14 * 216 V = (4/3) * 678.24 V = ? I am
  16. Physics

    A parallel-plate capacitor is constructed of two horizontal 15.2-cm-diameter circular plates. A 1.9 g plastic bead, with a charge of -5.6 nC is suspended between the two plates by the force of the electric field between them. What is the charge on the
  17. Math

    A cone and a square based pyramid have slant heights of 6 inches . The diameter for the cone and the base edge of the pyramid are both 8 inches. How would I find which space figure has the greater surface area
  18. economics

    Help me reword this?? The Fed is organized as a corporation, owned by its member banks, and directed by a government-appointed board. Monetary policy affects the size of the money supply and the level of interest rates. The first "tool" of monetary
  19. Statistics

    A reseacher would like to determine whether a change in lighting to full spectrum light bulbs increases productivity on an assembly line. A sample of n= 36 participants is obtained, and the light bulbs over the line are replaced. under general/historical
  20. Calculus Help Please!!!

    When blood flows along a blood vessel, the flux F (the volume of blood per unit time that flows past a given point) is proportional to the fourth power of the radius R of the blood vessel: F = kR4 (This is known as Poiseuille's Law.) A partially clogged
  21. History

    How did the Treaty of Versailles change Europe and effect Germany in particular? Please tell us what you know about how the treaty of Versailles changed Europe and Germany, and we'll be glad to add our comments and critique your answer. How did the Treaty
  22. math

    how do I find the max number of 1.7 inch diameter spheres that can be stored in a cylindrical tank the tank has a radius of 2 inches and height of 4 inches there are 2 inches of water in the tank
  23. Physics

    A large horizontal circular platform (M=143.1 kg, r=3.01 m) rotates about a frictionless vertical axle. A student (m=75.3 kg) walks slowly from the rim of the platform toward the center. The angular velocity ω of the system is 2.10 rad/s when the
  24. Physical Science

    Suppose you are traveling in a bus at highway speed on a nice summer day and the momentum of an unlucky bug is suddenly changed as it splatters onto the from window. a. Compared to the force that acts on the bug, how much force acts on the bus? (more) (the
  25. Biology

    6. Consider an experiment in which starch is dissolved in a liter of water. Some of the solution is placed into a securely tied dialysis bag. The dialysis bag is placed into a beaker containing distilled water and iodine for 30 minutes. What are the
  26. physics

    A merry-go-round revolves at a rate of 8.3 rev/min. A child who is seated at the outer edge of the merry-go-round travels at 6.9m/s. What is the diameter of the merry-go-round?
  27. gas laws chemistry

    A neon sign is made of glass tubing with an inside diameter of 12.7 mm and length of 16.0 m. If the sign contains neon at a pressure of 7.56 torr at 33°C, how much neon is in the sign?
  28. physic

    he current in a 100 watt lightbulb is 0.840 A. The filament inside the bulb is 0.140 mm in diameter. a) What is the current density in the filament? b) What is the electron current in the filament?
  29. technical drawings

    a circle of diameter 80mm and a line BC. The ratio of the circle to the line BC is 7:5. what is the true length of the line from the center of the circle.2. what is the actual diamter of the cirlce. thanks
  30. English

    “When my grandfather was in the hospital and was close to death, my parents did not take me to see him, as most parents with younger children would not. The reason behind this action is that they want the child to remember this person before they were
  31. physics

    A proposed space station consists of a circular tube that will rotate about its center(like a tubular bicycle tire). The circle formed by the tube has a diameter of 1.1km. What must be the rotation speed(revolutions per day) in an effect nearly equal to
  32. physics

    A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1 km. What must be the rotation speed (revolutions per
  33. physics

    A rubber ball filled with air has a diameter of 25.1 cm and a mass of 0.618 kg. What force is required to hold the ball in equilibrium immediately below the surface of water in a swimming pool? I tried using the equation B = density(fluid)volume(object)g B
  34. Physicssssss

    At what rate must the cylindrical spaceship of Fig. 5-30 rotate (see Question 12 of the textbook), if occupants are to experience simulated gravity of g/6? Assume the spaceship's diameter is 44 m, and give your answer as the time needed for one revolution.
  35. PHYSICS - PLEASE HELP

    A 66 kg human sprinter can accelerate from rest to 11 m/s in 3.4s. During the same interval, a 35 kg greyhound can accelerate from rest to 20 m/s. Compute (a) the change in kinetic energy of the sprinter. (b) the change in kinetic energy of the greyhound.
  36. physics

    A 66 kg human sprinter can accelerate from rest to 11 m/s in 3.4s. During the same interval, a 35 kg greyhound can accelerate from rest to 20 m/s. Compute (a) the change in kinetic energy of the sprinter. (b) the change in kinetic energy of the greyhound.
  37. math

    One of the world's fastest roller coasters is located in a theme park in Valencia, California. Riders go from 0 to 100 miles per hour in 7 seconds. Find the acceleration of the roller coaster during this time interval in miles per second squared. Math -
  38. physics

    The caber toss is a traditional Scottish sport that involves hurling a caber, which is essentially a large piece of a tree: a caber is a 6 m long, 80 kg tree trunk. Large strong people hurl these and the goal is to get the caber to land as far away as
  39. Ecology

    The experiment of Clausen, Keck and Hiesey discussed in lecture and illustrated in Fig. 4.4 of the textbook would be an example of a: a. common garden experiment b. reciprocal transplant experiment c. both of the above d. neither of the above Their
  40. A suggestion -@Writeacher

    I don't know whether suggestions are welcomed,but I would like to express what I feel about this change and hope anyone won't misunderstand this as being rude. From my point of view this change will be causing some difficulties to students and also
  41. Physics - HELP PLS

    A small dipole of length l with an input current Io radiates an electromagnetic wave that is TEM respect r with an electric field given by: E = j*w*μ*(1/2)*(Io*l/(4*pi))*e^(-jkr)/r * sinθ Find the expression of the magnetic field, the Poynting
  42. Chemistry!!!

    Use Le' Chatelier's Principle. a solution at equilibrium: BaCrO4(s)<> Ba^2+(aq)+ Cr)4^-(aq)recall: 2CrO4^2-(aq)+ 2H^+(aq)<> Cr2O7^2-(aq) +H20 2CrO4^2- yellow Cr2O7^2- orange Make predictions about colour changes or changes in the number of
  43. Redox

    We have to write the balanced redox equation for this and this is the only one im stuck on. Incase theres another way to do it, we have to do it where you write all the oxidation numbers and then find out which one is reducaed which is oxidized, then write
  44. Physics

    A coil consists of N=10^5 turns of wire wrapped uniformly around a plastic torus. The inside radius of the torus is r0=0.15 m and the outer radius is r1=0.16 m. Thus, each winding has a diameter d=0.01 m. What is the self-inductance (in H) of this coil?
  45. texas A&M university

    A commonly used rule of thumb is that the average velocity in pipe should be about 1m/s or less"thin" fluids( viscosity about water). if pipe needs to deliver 6000m of water per day, what diameter is required to satisfy the 1-m/s rule?
  46. Math

    All of the water from a full cylindrical tank is drained into a rectangular aquarium. The cylinder has a height of 50cm and a diameter of 30cm. How deep is the water in the aquarium, if it has a rectangular base measuring 40cm by 20cm.
  47. biology

    Need help with FOV area (mm2) totally confused? im confused i have the FOV diameter they are: 4x = 5 10x = 2 40x = 0.5 a classmate told me she thinks the area for 40 x is: pi(5/2)^2 = 19.6 not sure if that's true or how to do it for the low and medium,
  48. physics

    An owl has good night vision because its eyes can detect a light intensity as small as 5.0*10^-13 W/m2. What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 7.0 mm and the light has a wavelength of 545
  49. Physics

    An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an automobile of mass 850kg traveling initially at a speed of 38.0km/h in a distance equal to the diameter of a dime, which is
  50. physics

    The Yerkes refracting telescope has a 1 m diameter objective lens of focal length 20 m.Assume it is used with an eyepiece of focal length 4.31 cm. Find the angular magnification of the planet Mars as seen through this telescope
  51. Math

    Janine wants to paint just the sides of a cylindrical pottery vase that has a height of 45 cm and a diameter of 14 cm. To the nearest whole number, find the number of square centimeters she will need to paint. Explain the method you would use to find the
  52. geometry

    Janine wants to paint just the sides of a cylindrical pottery vase that has a height of 45 cm and a diameter of 14 cm. To the nearest whole number, find the number of square centimeters she will need to paint. Explain the method you would use to find the
  53. physics

    A submarine is stranded on the bottom of the ocean with its hatch 25.0 m below the surface. Calculate the force needed to open the hatch from the inside, given it is circular and 0.450 m in diameter. Air pressure inside the submarine is 1.00 atm.
  54. Mathematicz (The Correct Question)

    A pipe has an outer radius of 4 1/2 cm. If the metal is 1/4 cm thick, what is the inner diameter of the pipe? Please help me!!! You not you just subtract from the or the wall thickenss, then double it to get the id? Draw two concentric circles and see if
  55. Maths

    A uniform cylindrical container is half filled with water. The height of the cylinder is twice its diameter. The cylinder is gradually tilted until the water touches the brim. At this instant, the container is inclined at which angle: 1.30 2.45 3.60 4.75
  56. math

    The sides of a square field are 12 meters. A sprinkler in the center of the field sprays a circular area with a diameter that corresponds to a side of the field. How much of the field is not reached by the sprinkler? Round your answer to the nearest
  57. physics

    Two 173 turn coils, each with a diameter of d = 4.45 m, are placed w = 1.31 m apart, as shown in the figure. A current of 6.99 A is flowing in the wires of both coils; the direction of the current is clockwise for both coils when viewed from the left. What
  58. maths

    A building is in the form of a cylinder surmounted by a hemispherical vaylted dome and contains 1144/21 m3 of air. If the internal diameter of the dome is equal to 4/5th of the total height above the floor, find the height of the building
  59. solid mensuration

    A cylindrical tank with flat ends has a diameter of two meters and is 5meters long. It is filled with fuel to a depth of one and one-half meters. Find the volume of the fuel in the tank in liters. plsss help!!
  60. physics

    A 5.30 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.570 T pointing up. During the course of 0.190 s, the field is changed to one of 0.350 T pointing down. What is the average induced emf in the
  61. Math

    If you are riding a bike and your front sprocket (the one with the pedals) has 40 teeth and the rear sprocket (the one connected to your back tire) has 20 teeth, and you are pedaling at a rate of 50 rpm, how fast are you going if your bike has 27 inch
  62. physics

    An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an automobile of mass 850kg traveling initially at a speed of 56.0km/h in a distance equal to the diameter of a dime, which is
  63. college physics

    A 4m long copper wire has a diameter of 2mm and carries a current of 10A. Determine the ff: a. current density in the wire b. electric field c. potential difference between the ends of the wire d. resistance of the wire
  64. math

    The sides of a square field are 32 meters. A sprinkler in the center of the field sprays a circular area with a diameter that corresponds to a side of the field. How much of the field is not reached by the sprinkler? Round your answer to the nearest
  65. Maths

    A satellite takes 93.8 minutes to orbit the earth. If the diameter of the earth is 12740km approximately and the satellite is at a height of 32km above the earth's surface, find the average speed of the satellite in km/h Working out please
  66. physics

    An aluminum saucepan with a diameter of 18 cm and a height of 6.0 cm is filled to the brim with water. The initial temperature of the pan and water is 19°C. The pan is now placed in a refrigerator and cooled to 9°C. Calculate the drop in water level in
  67. math

    A circular flower bed is surrounded by a path 4m wide . the diameter of the flower bed is 66m . what is the area of this path
  68. math

    The surface area of spherical ball of radius r is given by the formula S=4(22/7)r2. Find surface area of ball of diameter 12cm.
  69. math

    A radius of a circle has end points at O(-1,3) and R(2,2). find two possible end points for the diameter that contains this radius. describe any assumptions you make.
  70. math

    smallest golf ball has a volume of 2.48 cubic inches. If the diameter is increased bt a factor of 1.1 what will the volume of the golf ball be?
  71. Math

    Conner estimated that the radius of one of the circles on the playground was 2 yards. If Conner was correct then: a. the radius was how many feet? b. the diameter was how many feet? Thanks!
  72. math

    which has a greater area, a circular garden with a diameter of 20 meters or a square garden with sides with sides that are 20 meters long
  73. math

    A radius of a circle has end points at O(-1,3) and R(2,2). find two possible end points for the diameter that contains this radius. describe any assumptions you make.
  74. Math

    The endpoints of the diameter of a circle are at (1, 2) and (7, -6). What is the circumference of the circle, to the nearest tenth of a unit? A. 15.7 units B. 31.4 units C. 62.8 units D. 78.5 units I am confused. Please help me.
  75. math

    A circular flower bed is surrounded by a path 4m wide . the diameter of the flower bed is 66m . what is the area of this path
  76. Math

    What number is 100,000 greater than 99,999,999? In which places did the digits change? write 10 multiples of 9 What number is 100,000 greater than 99,999,999? it just means that u hv to add 100,000 to 99,999,999 which is 10099999 11 99999999 + 100000
  77. English composition

    Hi, I have to write a reflection paper for my human development class. I am working with first graders in an elementary school and our professor wants to know this: Choose one thing about your practicum site that you think should be different. This can be
  78. Jennifer

    I asked this question yesterday and it was answered, but I still have a question on it. Standard entropies for substances are defined at a pressure of exactly 1 bar in some books or exactly 1 atm(760 torr) in different books. For gases, this correction
  79. Algebra

    A large grain silo is to be constructed in the shape of a circular cylinder with a hemisphere attached to the top (see the figure). The diameter of the silo is to be 30 feet, but the height is yet to be determined. Find the height h of the silo that will
  80. physics

    A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis (so at a
  81. geometry

    On July 16, 1882, a massive thunderstorm of Dubuque, Iowa, produced huge hailstones. The diameter of some of the hailstones was 17 inches. Ice weighs about 0.033 pounds/inches cubed. What was the approximate weight of these hailstones to the nearest pound?
  82. calculus

    a spherical snowball with diameter 4 inches is removed from the freezer in June and begins melthing uniformly such that it is shrinking 2 cubic inches per minute. How fast ( in square inches per minute) is the surface area decreasing when the radius is 1
  83. physics

    An undersea research chamber is spherical with an external diameter of 5.30m . The mass of the chamber, when occupied, is 78500kg . It is anchored to the sea bottom by a cable. The density of seawater is 1025 kg/m3. a) What is the buoyant force on the
  84. PHYSICS URGENT

    While flying at an altitude of 7.25 km, you look out the window at various objects on the ground. If your ability to distinguish two objects is limited only by diffraction, find the smallest separation between two objects on the ground that you can resolve
  85. trigonometry

    A truck with 48-in.-diameter wheels is traveling at 55 mi/h. Find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes: __rad/min How many revolutions per minute do the wheels make?__ rpm
  86. math

    The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. In a random sample of 460 pencils, approximately how many would you expect to have a diameter less than
  87. physics HELP

    A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis (so at a
  88. calculus

    A group of engineers is building a parabolic satellite dish whose shape will be formed by rotating the curve y=ax^2 about the y-axis. If the dish is to have a 6-foot diameter and a maximum depth of 2 feet, find the value of a and the surface area (in
  89. physics

    A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis (so at a
  90. Chemistry

    What is the de Broglie wavelength of an oxygen molecule, O2 traveling at 521 m/s? Is the wavelength much smaller or much larger than the diameter of an atom. (on the order of 100 pm) De Broglie wavelength = h/mv h = Planck's constant in J*s. m is mass in
  91. chemistry

    can you tell me what i did wrong on this problem Rigid rods of negligible mass lying along the y axis connect three particles. The system rotates about the x axis with an angular speed of 3.30 rad/s. 4kg,y=3.00m 2kg,y=-2.00m 3kg,y=-4.00m a)Find the total
  92. Statistics

    A college statistics class conducted a survey of how students spend their money. They asked 25 students to estimate how much money they typically spend each week on fast food. They determined that the mean amount spent on fast food is $31.52 with a
  93. Physics

    The function ax(t) describes the acceleration of a particle moving along the x-axis. At time t=0, the particle is located at the position x0 and the velocity of the particle is zero. ax(t)=a0e−bt The numerical values of all parameters are listed
  94. climate change

    What are the consequences of the rising sea level? TY
  95. chemistry

    if i want to change the pH of any solution from 5 to 8 what the volume of NaOH 0.1 N needed
  96. Math

    For f(x) = 0.01(2)x, find the average rate of change from x = 3 to x = 8. A.0.08 B.0.496 C.2.48 D.5
  97. Math

    For f(x) = 0.01(2)^x, find the average rate of change from x = 2 to x = 10. A.1.275 B.8 C.10.2 D.10.24
  98. math please help and hurry!!

    What is the rate of change for 2x^2 + 3 and 2^x + 3?? I have no idea please help meeeeeeeee
  99. 6th grade

    how do you change a fraction into a mixed number?
  100. Science

    What is special about characteristic properties of matter? They do not change.