1. physics

    Sound is passing perpendicularly through an open window whose dimensions are 1.1 m  0.75 m. The sound intensity level is 95 dB above the threshold of hearing. How much sound energy comes through the window in one hour?
  2. physics

    Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. The sound intensity level is 71 dB above the threshold of human hearing. How much sound energy comes through the window in one hour?
  3. English

    1. Mind your own business. 2. Be careful of/about your own business. 3. Take care of your own business. ---------------------- Does #1 mean #2 or #3? 4. Do you mind if I open the window? 5. Do you feel annoyed if I open the window? 6. Do you opposed to me
  4. English

    1. Can I open the window? 2. May I open the window? 3. Might I open the window? ------------------ Which one is common? Is #2 more polite than #1? Can we use #1 when we talk to elderly people? #3 rarely seems to be used. When can we use #3?
  5. physics

    The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.90 10-10 T. The wave passes perpendicularly through an open window, the area of which is 0.20 m2. How much energy does this wave carry through
  6. Physics

    The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.7 × 10-10 T. The wave passes perpendicularly through an open window, the area of which is 0.23 m2. How much energy does this wave carry
  7. physics

    The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.90 10-10 T. The wave passes perpendicularly through an open window, the area of which is 0.20 m2. How much energy does this wave carry through
  8. AP English

    Hello I have to create a thesis statement comparing the stories "The Story of an Hour" and "The Open Window". I must convey which story (in my opinion) had the most twisted ending. Does this sound appropriate? "While both 'The Story of an Hour' and 'The
  9. Calc

    A Norman window is constructed by adjoining a semicircle to the top of a rectangular window as shown in the figure below. If the perimeter of the Norman window is 24 ft, find the dimensions that will allow the window to admit the most light.
  10. communication

    Angelo says, "I want to open the window while we work in here." Bruce says, "I want to keep the window closed." Jenna then asks Angelo, "Will you be satisfied if we have the window open?" Jenna is: buying time with limited agreement. offering an
  11. English

    Mom came to Emily's room and found the window was open. It was raining hard outside. Because the window was opened, the books on the desk were wet. A: Emily, look at the books. They are all wet. B1:Oh, no. I'm sorry. I forgot to close the window.
  12. science sound and light!!!

    which of the following involves the diffraction of light waves? A.a glass of water acts like a prism, splitting sunlight from a window into a rainbow on the far wall. B.a stained glass window only allows some of the light from the sun into a room. C.light
  13. sharma

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider
  14. science

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider
  15. physics

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider
  16. physics

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider
  17. physics

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider
  18. physics

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider
  19. physics

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider
  20. math

    If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider
  21. Physics

    A ball thrown upward from the a point 7 meters below the bottom of a window rises past the window, which is 2.5 meters high, passing the window in 0.33 seconds. How fast was it going when it reached the bottom of the window, and with what velocity was it
  22. Math

    the length of a rectangular window is 6 feet more than its width, w. the area of the window is 100 square feet. which equation could be used to find the dimensions of the window?
  23. Maximal area and dimensions of a window

    Hey Jiskha, came across this problem in my maths homework and I can't seem to solve it. Can someone maybe help me out? A Norman window has the shape of a rectangle with a semi circle on top; diameter of the semicircle exactly matches the width of the
  24. calculus

    A Norman window is constructed by adjoining a semicircle to the top of a rectangular window . (The diameter of the semicircle is the same as the width of the rectangular) If the perimeter of the Norman window is 20 ft, find the dimensions that will allow
  25. Physics

    Indicate true or false in each of the following statements: 1. a tube open at one end resonates with only odd harmonics 2. The frequency of a sound emitted by a vehicle as it moves toward you rises as you listen 3. a tube open at both ends resonates with
  26. calculus

    a norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. Find the dimensions of a Norman window of maximum area it the total perimiter is 52 feet.
  27. AP Calculus

    a norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. find the dimensions of a norman window of maximum area if the total perimeter is 72 units. Base value is 21.
  28. Physics

    A sound wave is incident on a pool of fresh water. The sound enters the water perpendicularly and travels a distance of 0.55 m before striking a 0.10-m-thick copper block lying on the bottom. The sound passes through the block, reflects from the bottom
  29. cal

    A Norman window has the shape of a rectangle surmounted by a semicircle (see the figure below). If a Norman window is to have a perimeter of 24 ft, what should its dimensions be in order to allow the maximum amount of light through the window? (Round your
  30. Calculus

    An architect wants to design a window in the shape of a rectangle capped by a semicircle. If the perimeter of the window is constrained to be 24 feet, what dimensions should the architect choose for the window in order to admit the greatest amount of
  31. English

    1. Turn off the radio, will you? 2. Turn off the raidio. 3. Turn off the raido, please. ................................... Is #1 a polite sentence? Is #1 the same as #3 in politeness? 4. Open the window, will you? 5. Open the window, won't you? 6. Don't
  32. Algebra

    Window World, Inc. is responsible for designing windows for the expansion of the campus chapel. The current design is shown in the figure. The metal trim used to secure the perimeter of the frame is 126 inches long. If the maximum window area is desired,
  33. Algebra

    Building windows: Window World, Inc., is responsible for designing new windows for the expansion of the campus chapel. The current design is shown in the figure. The metal trim used to secure the perimeter of the frame is 126″ long. If the maximum
  34. calculus

    I really hate to dump a problem like this on the teachers here, but I really need to get an answer to this. Thank you and I'm sorry. A Norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. Find the dimensions
  35. science

    Virginia hears a scratching sound outsides her window almost every night. Which of the following would be good evidence to gather to test the hypothesis that a tree branch is rubbing the outside of Virginia's window? a) set a trap to catch any animals by
  36. Physics

    You want to make an open-ended flute, open at both ends, with fundamental frequency (lowest pitch sound it produces) of 680 Hz. Assume speed of sound in air is 340 m/s. a) What should the length of the flute be?
  37. Physics

    A drowsy cat spots a flowerpot that saild first up and then down past an open window. The pot was in view for a total of .43 s, and then top-to-bottom height of the window is 2m. How high above the window top did the flowerpot go?
  38. AP Physics...ahaha

    A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of .43 s, and the top-to-bottom height of the window is 2 m. How high aboe the window top did the flowerpot go?
  39. calculus - applied problems

    Max area - A Norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. Find the dimensions of a Norman window of maximum area if the total perimeter is 16 feet. - - - - - --------- ! ! ^ !<-x/2->! y
  40. Calculus

    A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus, the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 25 ft, find the dimensions of the window so that the greatest possible
  41. calculus - applied problems

    Max area - A Norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. Find the dimensions of a Norman window of maximum area if the total perimeter is 16 feet. - - - - - --------- ! ! ^ !<-x/2->! y
  42. calculus

    A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 30ft, find the dimensions of the window so that the greatest possible amount of light is admitted. I keep screwing up in creating my equation. p =
  43. Calculus

    A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus, the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 20 ft, find the dimensions of the window so that the greatest possible
  44. Calculus

    A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus, the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 20 ft, find the dimensions of the window so that the greatest possible
  45. Math

    You have a room in your home that has a bay window (looks like a trapezoid shape on the floor). You need to figure out the area of the room in order to get carpeting. The rectangular part has dimensions of 24ft by 30ft. If the window has a depth of 2ft.
  46. physics

    A girl inside a room is looking at the window and sees a volleyball passing outside the window of width w and height d. The ball appears from the upper left corner A of the window and disappears at the lower right corner B in t0 second. The girl knows that
  47. English

    Can you please check these sentences, too? Thank you. I just wonder if you could use these expressions in a common conversation. 1) I sent John three letters but he hasn't replied (not didn't reply)to any of them. 2) When did you get that jacket? I haven't
  48. English

    1. Open the window, will you? 2. Don't close the door, will you? 3. Open the window, won't you? 4. Have a cup of coffee, won't you? 5. Have a cup of coffee, will you? -------------------------------------- Ae they all grammatical? Which ones are not okay?
  49. physics

    An organ pipe is open at both ends. It is producing sound at its sixth harmonic, the frequency of which is 257 Hz. The speed of sound is 343 m/s. What is the length of the pipe? m open: doesn't this mean the length is equal to n/2 wavelengths, where n=
  50. Two Loudspeakers in a open field Pjysics

    Imagine you are in an open field where two loudspeakers are set up and connected to the same amplifier so that they emit sound waves in phase at 688 Hz. Take the speed of sound in air to be 344 m/s. If you are 3.00m from speaker A directly to your right
  51. Physics

    A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of 0.37 s, and the top-to-bottom height of the window is 2.20 m. How high above the window top did the flowerpot go? S= ut +(1/2)at^2 S=
  52. Physics

    A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of 0.37 s, and the top-to-bottom height of the window is 2.20 m. How high above the window top did the flowerpot go? S= ut +(1/2)at^2 S=
  53. English

    Is this too much of a mouthfull? “Mr. Nuttel, you may wonder why we keep that window open on such a cold October day,” she said, motioning toward a large, French window that opened on to a green, pristinely manicured lawn.
  54. Physics

    Sound of a certain wavelength is coming from within a room and passing through a rectangular door (a "slit"). If the width of the doorway is twice the wavelength of the sound, what is the diffraction angle è of the sound leaving the doorway? Please show
  55. Physics

    A drowsy cat spots a flower pot that sails first up and then down past an open window. The pot is in view for a total of 0.50s. And the top to bottom height of the window is 2.00m. How high above the window top does the flower pot go?
  56. Physics- Elena please help!

    An interstate highway has been built though a poor neighborhood in a city. In the afternoon, the sound level in a rented room is 114.0 dB as 172 cars pass outside the window every minute. (a) What is the sound intensity during the day ? (Reminder: If you
  57. physics

    You are riding in the back of an open pick-up truck in the snow as you pass your friend's house. Despite the fact that it is snowing you know that he has a habit of being in his bedroom with the light on and his bedroom window open. Being as you are riding
  58. math

    If a storm window has an area of 315 square inches, what are the dimensions if the window is 6 inches higher than it is wide (w x h)?
  59. Math

    A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus, the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 30 ft, find the dimensions of the window so that the greatest possible
  60. math

    A steel ball is dropped from rest from the roof of a building. An observer standing behind a window that is part way down the building 120 cm high notes the ball takes 0.125 s to fall from the top to the bottom of the window. The ball continues to fall,
  61. Physics

    Organ pipes, open at one end, resonate best at their first resonant length. Two pipes have length 23.0 cm and 30.0 cm respectively. What is the wavelength of the sound emitted by each pipe? What are the respective frequencies if the speed of sound is 341
  62. Algebra 2

    Can you double check my answer The lengths of the sides of a rectangular window have the ratio 1.6 to 1. The area of the window is 2,560 square inches. What are the dimensions of the window? (1 point) 50.6 inches by 50.6 inches 40 inches by 64 inches 40
  63. calculus

    Construct a window in the shape of a semi-circle over a rectangle.If the distance around the outside of the window is 12 feet.What dimensions will result in the rectangle having the largest possible area? We need to find Amax I know the circmfrence is 12
  64. physics

    Suppose that the range of output frequencies is from 47.4 Hz to 14.8 kHz for a pipe organ. Take 343 m/s for the speed of sound. (a) What is the length (in units of m) of the longest pipe open at both ends and producing sound at its fundamental frequency?
  65. English

    Can you check these very last sentence of the day, please? 1) One day (and not once)the thieves jumped through the window of my house 2) One day the thieves got into my house through my bedroom's window. Actually, I had left it open through negligence. 3)
  66. Math

    I am in third grade and have a word problem that I don't understand. There is a picture of a retangular window with 12 little squares inside divided by wood. The question is how many feet of lights would be needed to hang around five windows like this one.
  67. physics

    The range of human hearing is roughly from twenty hertz to twenty kilohertz. Based on these limits and a value of 350 m/s for the speed of sound, what are the lengths of the longest and shortest pipes (open at both ends and producing sound at their
  68. mechanics

    A cat is sleeping on the floor in the middle of a 4m wide room when a barking dog enters with a speed of 1.8m/s. As the dog enters, the cat immediately accelerates at 0.85m/s^2 towards an open window on the opposite side of the room. The dog; a bit amazed
  69. Physics

    Imagine you are in an open field where two loudspeakers are set up and connected to the same amplifier so that they emit sound waves in phase at 688 Hz. Take the speed of sound in air to be 344 m/s. If you are 3.00 m from speaker A directly to your right
  70. physics

    What are the three longest wavelengths for standing sound waves in a 126-cm-long tube that is? (a) open at both ends and (b) open at one end, closed at the other?
  71. Physics121

    What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?
  72. Physics121

    What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?
  73. Physic

    What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?
  74. physics

    When light strikes glass perpendicularly, about 5.5% is reflected at each surface. How much light is transmitted through a pane of window glass?
  75. calculus

    Consider a window the shape of which is a rectangle of height h surmounted by a triangle having a height T that is 1.1 times the width w of the rectangle If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.
  76. calculus

    Consider a window the shape of which is a rectangle of height h surmounted by a triangle having a height T that is .3 times the width w of the rectangle If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.
  77. Calculus

    A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 30ft, find the dimensions of the window so that the greatest possible
  78. PHYSICS ASAP!!

    An office window has dimensions 3.6 m by 1.6 m. As a result of the passage of a storm, the outside air pressure drops to 0.95 atm, but inside the pressure is held at 1.0 atm. What net force pushes out on the window?
  79. Physics

    An office window has dimensions 3.6 m by 2.5 m. As a result of the passage of a storm, the outside air pressure drops to 0.925 atm, but inside the pressure is held at 1.0 atm. What net force pushes out on the window?
  80. english

    I shall wirte what I would say, but we are speaking about modals, so I think I have to answer with them... My solutions: 1. Your teacher is carrying a pile of heavy books. Offer help. -> Shall I carry that for for? or Sorry, can I help you? 2. A friend
  81. science

    Virginia hears a scratching sound outside her window almost every night. She finds that no tree branches can reach the window even in the strongest wind. What should she do next to solve this problem using the scientific method? a) do another experiment b)
  82. Calc

    Consider a window the shape of which is a rectangle of height h surmounted by a triangle having a height T that is 0.5 times the width w of the rectangle (as shown in the figure below). If the cross-sectional area is A, determine the dimensions of the
  83. Calc

    Consider a window the shape of which is a rectangle of height h surmounted by a triangle having a height T that is 0.5 times the width w of the rectangle (as shown in the figure below). If the cross-sectional area is A, determine the dimensions of the
  84. Physics help - Waves and Sound Questions

    1) A 1.50-m long gas column that is open at one end and closed at the other has a fundamental resonant frequency 80.0 Hz. What is the sound speed in this gas? a) 120 m/s b) 30.0 m/s c) 480 m/s d) 213 m/s e) 53.3 m/s 2) You drop a stone down a well. You
  85. Calculus

    I actually have two questions: 4. An open box is to be made from a rectangular piece of material 3m by 2m by cutting a congruent square from each corner and folding up the sides. What are the dimensions of the box of the largest volume made this way, and
  86. physics

    An organ pipe is open at both ends. It is producing sound at its sixth harmonic, the frequency of which is 257 Hz. The speed of sound is 343 m/s. What is the length of the pipe The open pipe has to be of length lambda/2, and odd number. Fundamental L=
  87. English

    I'm sending you the first sentence again since I mispelt a word (grass must be glass). Thank you for your help.I hope in your prompt reply since I need it for tomorrow. As he intended to open the window (In an attempt to open it), he knocked his knuckles
  88. Math

    A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 26 ft, express the area A of the window as a function of the width x of the window.
  89. Calculus 1

    A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 32 ft, express the area A of the window as a function of the width x of the window.
  90. Differential Calculus

    A norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window 10 m, express the area A of the window as the function of width x of the window.
  91. calc

    Given that a window entails a rectangle capped by a semi-circle, given that the semi-circle’s diameter concides with the rectangle’s width, given that the window’s outside (linear and curvilinear) perimeter is 24 feet, and given that the
  92. calc

    1.A norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window find the dimensions of a Norman window of maximum area when the total permeter is 16ft. 2. A rectangle is bounded by the x axis and the semicircle
  93. Physics

    Two trains approach each other at a railroad crossing. Train 1 travels 80 km/h and Train 2 travels 50 km/h. They both sound their horns before passing each other, emitting sound waves at 300 Hz. The speed of sound is 343 m/s. At what frequencies does a
  94. AP CaLC. AB

    1. A fence 8 ft tall runs parallel to a tall building at a distance of 7 ft from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building? Round the result to the nearest hundredth.
  95. math

    you are trying to cool your house. The temp in the house is 85. Your ac is set for 78. The outside temp is 71. Which will cool the house the fastest leaving the windows open or leaving the windows closed? With the AC running, it will be better to open the
  96. physic

    An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature, and a 350 Hz tuning fork is held at the open end. Resonance is heard when the piston is at a distance d1 =
  97. physics help please please please!!!

    A spaceship lands on a new planet. the crew decides to measure the speed of sound in the planets atmosphere. taking a tube with a length of 50 cm, they find that one resonant frequency occurs at 2,520 Hz, and the next resonant frequency at 2,940 hz. what
  98. science of sound

    a violin string’s length from nut to bridge is 33 cm, and on the open string A=440 Hz is played. What is the wavelength of the sound?
  99. English

    Thank you very much for your last corrections. I forgot to include these ones. 1)As he intended to open the window (In an attempt to open it), he knocked his knuckles through the grass and tried to seize it. 2) He saw a face looking through the window. As
  100. physics - please help me!

    Hello! I'm having a bit of trouble trying to solve this physics problem. I'm not sure which equations to use or where or how to plug my variables: Robin Hood wishes to shoot an arrow through the open window of a tall castle wall. The window is 16m meters