1. physics

    A 2.7 kg block, starting from rest, slides down a ramp with friction. The top of the ramp is 1.5 m above the ground; the bottom of the ramp is h = 0.25 m above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance d away. Find the distance ...
  2. Physcis

    An object slides without friction in a bowl shaped like a hemisphere. It is released from rest at one edge of the bowl, slides up the other side before stopping right on the edge of the bowl. During which part of this process is the power being delivered by the gravitational ...
  3. business

    Letter to the editor: “Once again the Park Commission is considering closing North Park Drive for the sake of a few joggers and bicyclists. These so-called fitness enthusiasts would evidently have us give up to them for their own private use every last square inch of Walnut ...
  4. college

    5. Letter to the editor: “Once again the Park Commission is considering closing North Park Drive for the sake of a few joggers and bicyclists. These so-called fitness enthusiasts would evidently have us give up to them for their own private use every last square inch of ...
  5. Physics

    I am having trouble with the last portion of this question. If someone can help me, I would sincerely appreciate it. A bicycle wheel has a radius R = 32.0 cm and a mass M = 1.82 kg which you may assume to be concentrated on the outside radius. A resistive force f = 147 N (due ...
  6. physics

    The deepest place in the ocean is the Marianas Trench in the western Pacific Ocean, which is over 11.0 km deep. On January 23, 1960, the research sub Trieste went to a depth of 10.915 km, nearly to the bottom of the trench. This still is the deepest dive on record. The density...
  7. physic

    you need to extend a 2.50 inch diameter pipe, but you only have 1.00 inch diameter pipe on hand.you make a fitting to connect these pipes end to end. if the water is flowing at 6.00cm/s in the wide pipe, how fast will it be flowing through the narrow one?
  8. math

    The scale for an earth model is 1:40000000. The diameter of the earth is 12,756.32km. a)What is the diameter of the model in cm? I got 31.9cm (just need help on part b!) b) If the model is cut in half, how many jars of paint would be needed to paint each half if 1 jar covered ...
  9. Math.

    A cone has a diameter of 24 in. and a height of 10in. What is the volume of s cone? use 3.14 as an approximation.. final answer in tenths - Im stuck between two answers: 94.25 because if I do 3 x 10 to find the volume. I say 3 because the diameter is 24 in., also 8 x 3 equals ...
  10. math-probability

    A person repeatedly and independent flips a fair coin to decide whether to take a step to the left or to the right from a point X. Determine the expected number of times the person returns to X.
  11. math

    a 154 lb person burns 420calories per hour riding an exercise bicycle at a rate of 15 mi/hr write a function rule to represent the total calories burned over time by that person.
  12. science

    1. The ability of an apple to change color when exposed to air is a ____. (1 point)physical property chemical property physical change chemical change 2. Which of the following is NOT a possible sign of a physical change? (1 point)a change in appearance a change in volume the ...
  13. ELA

    We have to write a paper about seashells,sunglasses,and sunscreen My cousins and I went to the beach last summer and we brought things top lay with there like our beach ball and water guns then we put on our suncreen and sunglasses before going in the water.We played games in ...
  14. Grammar and Compositon Bobpursley

    Ok! I put a good hour into this, and I really did try. Please don't be harsh if there are a lot of mistakes. Drafting-Organization Sheet 1)_____________Phone Book Names_________________ 2)_____________John E. Mackintosh_________________ 3)...
  15. Statistics 250

    Final averages are typically approximately normally distributed with a mean of 65 and a standard deviation of 8. Your professor says that the top 10% of the class will receive an A; the next 20%, a B; the next 41%, a C; the next 19%, a D; and the bottom 10%, an F. (Give your ...
  16. English

    1. Tom seems to like playing basketball. We can see a basketball and his uniform in the room. Look at the top and the bottom of the uniform. The basketball is on the uniform shorts. (is this passage grammatical? Would you correct any errors?) 2. My favorite street food is meat...
  17. Math

    Which statement is false? A: Every integer is a real number. B: the number zero is a rational number. C: every irrational number is a real number. D: every real number is a rational number****
  18. English/Creative Writing

    Will you help me? I don't know how I am supposed formulate my answers. A story's beginning should interest the reader and draw him or her into action. What would be some effective ways to start the following stories? 2. A third-person narrative about an adopted person going to...
  19. Algebra II Part 2

    The equation h=7 cos{pi/3 t} models the height h in centimetres after t seconds of a weight attached to the end of a spring that has been stretched and then released. Find the times at which the weight is at a height of 1 cm,of 3 cm,and of 5 cm below the rest position for the ...
  20. algebra II Part 2

    The equation h=7 cos{pi/3 t} models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched an then released. (C).Find the times at which the weight is at a height of 1 cm,of 3 cm,and of 5 cm below the rest position for ...
  21. physics

    a rod 300 cm long is hinged in a wall its weight is 50N. it is supported by a leg from other edge and an external weight of 80N is placed on the rod 50 cm away from the leg end.. find the tension in the leg?
  22. physics

    A person is traveling 3 m/s second south towards a car traveling 5 m/s.what is the magnitude and direction of the person?
  23. earth

    if a person's mass is 50 kilograms approximately how much force is exerted on the person at earth surface
  24. physics

    A person with a density of 980 kg/m3 floats in seawater of density 1025 kg/m3. What fraction of the person is submerged?
  25. programming

    10. Develop a C++ program that accepts the name of a person and then counts how many vowels the person’s name have.
  26. Physics

    A person weighs 150 N on the moon. If the acceleration due to gravity on the moon is 1.63 m/s2, what is the mass of the person?
  27. English

    1. I do not know every student. [I know some students, and I don't know some students.] 2. I do not know all persons in the room. [I know some persons in this room, but I don't know the other persons.] 3. I do not eat every fast food. [ I eat some fast food, but I don't eat...
  28. physics

    A child rides a ferrisvwheel for 3.5 minutes. If a rotation covers 986 feet and it rotates 1.5 times per minute, what is the velocity of the ride? Whats the mistake?
  29. computer science(Algorithm)

    An m X n YOUNG TABLEAU is an m X n matrix such that the entries of each row are in sorted order from left to right and the entries of each column are in sorted order from top to bottom. Some of the entries of YOUNG TABLEAU maybe ¡Þ, which we treat as nonexistent elements, ...
  30. AP Physics

    You are standing at the top of a cliff that has a stairstep configuration. There is a vertical drop of 6 m at your feet, then a horizontal shelf of 10 m , then another drop of 4 m to the bottom of the canyon, which has a horizontal floor. You kick a 0.49 kg rock, giving it an ...
  31. Visual Basic

    If you wanted your program to respond to an event every 5 seconds, you would use the ________control. timer having problems getting the name from my txtName box to show up on my lblmessage box. I am working on a simple program that one types there name at the top, click on a ...
  32. physics

    Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is A) smaller than the change in momentum of the larger mass, but not zero. B) larger than the change in momentum of the larger mass. C) zero. D) equal to the ...
  33. chemistry

    sucrose change of H is -2226.1kj/mol fructose change of H is -1265.6KJ/mol calculate the enthalpy change for the hydrolysis reaction of sucrose. sucrose + H2O(l)-> C6H12O6(s)+Fructose Is it just the products-reactants?? I'm confused.
  34. English

    I am writing a comparison essay how Miley cyrus song the climb argument is better than katy perry fireworks. I need help finishing my conclusion. my thesis restated is: Miley Cyrus's argument for how every person is an individual is more compelling than Katy Perry's argument ...
  35. math

    Which of the following situations describe quantities that combine to make 0? During the top of the fourth inning of a baseball game, the Ravens scored three runs. During the bottom of the fourth inning, the Raiders scored five runs to tie the game. Jacoby went on a hiking ...
  36. Chemistry

    When an electric current passes through water during the process of electrolysis, two gases are formed. One gas has a boiling point of -183 C and the other has a boiling point of -253 C. Has a physical change or chemical change occurred? Explain. I think it is a chemical ...
  37. Math

    To make green paint, Jeff's art teacher instructed him to mix blue and yellow paint. To make the desired shade of green, the ratio of blue paint to yellow paint is 3:4. What the does the ratio 3:4 mean? a. 4 parts yellow for every 3 parts blue b. 4 parts blue for every 3 parts...
  38. physical science

    A chair lift holding a 100 kg man rises 5 meters in height in 10 second time period. Ignore the weight of the chair and related machinery and answer the following: What is the weight (force exerted by his mass) of the man, in Newtons?
  39. algebra 1

    ASTRONOMY- an object's weight on mars can be found by multiplying 0.38 by the object's weight on mars. a) an object weighs p pounds,on earth. write an expression for its weight on mars. my answer is 0.38p, is it correct? b)dana weights 120 pounds, and her bicycle weighs 44 ...
  40. Physics

    A person heats a can of soup on a stove. If he does 250 Joules of work ON the soup by stirring it as the burner adds 1675 Joules of heat, what is the change in its internal enegry? I did 250- 1675 because the work done On something is negative. can you tell me if that's right.
  41. DIAMETER

    What is the approximate volume of this sphere, which has a diameter of 18 inches? A 339 cubic inches B 1,356 cubic inches C 3,052 cubic inches D 24,417 cubic inches PLZ EXPLAIN THE PROCESS
  42. Fluid Mechanic

    3) Air at standard conditions enters the compressor shown in Fig. Q3 at a rate of 0.3m3/s. It leaves the tank through a 3 cm diameter pipe with a density of 1.8 kg/m3 and the uniform speed of 210 m/s. (a) Determine the rate (kg/s) at which the mass of air in the tank is ...
  43. Physics

    In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) must be placed at the empty corner? (the rectangle has +3 uC charges in ...
  44. DE Science

    I am thinking A. A scientist claims plants and animals that exhibit reproductive cycles based on the changing seasons are highly affected by climate change. What is the correct justification of the scientist's claims? A) Climate change can cause a timing mismatch of energy ...
  45. 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 gained during a ...
  46. data management gr.12

    There is a new water park in your neighbourhood. A rider is not allowed to get on the slide at the top until the previous rider has comletely exited at the bottom. It is known that the mean ride time for this type of slide is 24.5 s and the standard deviation of ride times is ...
  47. Math

    Once a month a fast food chain offers a special when a coach brings in a team. Buy 5 hamburgers and get one free. This month, a team goes in after their game. Each person had one hamburger. Each of the players had a soda @ $.50 each and shared an order of french fries ($.95 ...
  48. MATH Trouble

    I have no idea what this problem means: For how many two-digit numbers if the ones digit larger than the tens-digit? Can you find a systematic way to arrive at the number? Ok, every 2-digit number looks like xy, where x is the 10's digit and y is the one's digit. It should be ...
  49. math

    A closed cylindrical storage container with a volume of 2800 cubic inches. The material for the top and bottom will cost $3 per square inch and the material for the sides will cost $4 per square inch. A) What dimensions of the container would minimize the cost of manufacturing...
  50. geometry

    An engineer is 980 ft from the base of a fountain at Fountain Hills, Arizona. The angle of elevation to the top of the column of water is 29.78. The surveyor’s angle measuring device is at the same level as the base of the fountain A.280 When the top of the column of water ...
  51. Math

    One kilometer is equal to 1,000 meters. What fractional part of a kilometer is 700 meters? Simplify your result? A college bookstore ordered 425 copies of a textbook at a cost of $22,525. What was the cost to the store for an individual textbook?
  52. Math

    A person standing close to the edge on the top of a 160-foot building throws a baseball vertically upward. The quadratic function s(t) = -16t^2 +64t + 160 models the ball's height above the ground, s(t), in feet, t seconds after it was thrown. After how many seconds does the ...
  53. algebra/trig

    A person is standing 50meters away from a target whos center is 90cm off the ground. The height to the person's eyes is 66inches. Find the correct height for the target if the person is standing 4.5 meters from the target. I have tried a couples times to solve this problem and...
  54. Math Help

    Use a proportion to find the length of side x for the pair of smilar figures below. They're both right triangles. Triangle 1 has 14cm on the the right side and 10cm on the bottom. Triangle 2 has x on the right side and 22cm on the bottom. My answer 14/10=x/22 10*x=14*22 10x/10...
  55. physics

    A 751 kg block is pushed on the slope of a 30◦ frictionless inclined plane to give it an initial speed of 50 cm/s along the slope when the block is 1.3 m from the bottom of the incline. The acceleration of gravity is 9.8 m/s^2. What is the speed of the block at the bottom ...
  56. physics

    A 58.4-kg person, running horizontally with a velocity of +3.84 m/s, jumps onto a 10.7-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. (Indicate the direction with the ...
  57. Math - Trig

    From the foot of a building I have to look upwards at an angle of 22degrees to sight the top of a tree. From the top of a building, 150 meters above ground level, I have to look down at an angle of depression of 50degrees to look at the top of the tree. a. How tall is the tree...
  58. physics

    what is the apparent angle the diameterof the moon subtends as seen from the earth in radians. average moon earth distance3.84*10e8 radius of the moon 1.74*10e6
  59. chemistry

    Draw an energy profile describing an exothermic reaction and label the energy activation and change of heat components of the profle. Calculate the change in heat when 6.00g of 2Cl2 are used in the reaction. Change of heat= -118.3 kcal/mol.
  60. Math

    A volmeter's pointer is 6 centimeters in length. Find an angle through which it rotates when it moves 2.5 centimeters on the scale.
  61. MATH

    A gyroscope of radius 18 cm rotates 35 times per minute. What is the linear velocity at a point on the edge of the gyroscope?
  62. Math

    If a tire rotates at 150 revs/min when the truck is travelling 40km/h, what is the circumference of the tire? 4.44 meters
  63. physics

    Propeller blade in aeroplane is 2m long if propeller rotates 1800rev/min compute tangential velocity.
  64. statistic

    Although there is a popular belief that herbal remedies such as Ginkgo biloba and Ginseng may improve learning and memory in healthy adults, these effects are usually not supported by well-controlled research (Persson, Bringlov, Nilsson, and Nyberg, 2004). In a typical study, ...
  65. English

    Hold on. I'll just go and get him for you. --------------- In this sentence, what is the meaning of 'get'? [situation] A person called. And the answerer answers the phone. The answerer wants to hand the telephone to the right person.
  66. Foreign Langauge

    Who is a person that's important to the history and/or culture of France. This person can be a political figure, scientist, artist, musician, athlete, religious figure, etc.
  67. Math

    Reasoning Four people each bought 2 bottles of Vermont maple syrup Each person plans to share their bottles with 3 friends How much does each person get?
  68. college physics

    A person walks from point A to point B as shown in the figure below. What is the person's displacement relative to A? What is the magnitude? What is the direction ° (counterclockwise from the +x-axis)?
  69. math

    The total hang time T in seconds, is given by T(h)=^h/2. Where h is the maximum height. If a person jumps 6 ft off the ground, determine for how many seconds the person is in the air.
  70. chemistry

    What pressure is a person exerting on the floor if the person weighs 145 lbs and has shoes that contact the floor over a total area of 300. cm^2?
  71. AP Chemistry

    What pressure is a person exerting on the floor if the person weighs 145 lbs and has shoes that contact the floor over a total area of 300. cm^2?
  72. trigonometry

    A person is standing 21 feet from a building. The angle of elevation between the person and the ground is 59°. Find the height of the building. (Round to the nearest hundredth)
  73. MATH

    A lamp is located on the ground 10m from a building. A person 2m tall walks from thelighttowardthebuildingatarateof2m/s. Findtherateatwhichtheperson’sshadow on the wall is shortening when the person is 5m from the building.
  74. trig

    I keep trying to find the power reducing formula for sin^4(x), but I can't seem to get all the fractional parts correct. The answer I should be getting is: sin^4(x)=(1/8)cos4x-(1/2)cos2x+(3/8) I can only get this far knowing feeling confident. When I go further I start making ...
  75. Chemistry

    Radium-223 nuclei usually decay by alpha emission. Once in every billion decays, a radium-223 nucleus emits a carbon-14 nucleus. Write a balanced nuclear equation for alpha emission. Write a balanced nuclear equation for carbon-14 emission.
  76. Chemistry

    Radium-223 nuclei usually decay by alpha emission. Once in every billion decays, a radium-223 nucleus emits a carbon-14 nucleus. Write a balanced nuclear equation for alpha emission. Write a balanced nuclear equation for carbon-14 emission.
  77. Physics

    Could someone help me with these questions. . . please 1. How does Rutherford’s model of the atom account for the back – scattering of alpha particles directed at the gold leaf 2. The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom...
  78. Algebra Grade 7

    The eight members of the Ping Pong Paddlers Club have a tournament in which every player plays a game against every other player. How many games are there in the tournament?
  79. Math: i do not understand

    A tractor manufacturing company machines axles to extremely small tolerances. The main power axles have a mean diameter of 3.0000 inches and a standard deviation of 0.0050 inch. What is the probability that a given axle will have a diameter between 2.9915 and 3.0004 inches? ...
  80. Physics 2 with calculus

    The wires leading to and from a 0.12--diameter lightbulb filament are 1.5 in diameter. The wire to the filament carries a current with a current density of 4.0×105 . what is the current density in the filament?
  81. Chemistry

    (a) Propylene, H2C=CH-CH3, can be reacted to form a polymer known as polypropylene (PP). What type of polymerization reaction is most appropriate for the formation of polypropylene? i)Addition Polymerization ii)Anionic Polymerization iii)Condensation Polymerization (b) What is...
  82. Physics: momentum

    While you are standing on a expanse of smooth ice, your friend throws a heavy ball towards you. How can you maximize your speed after your interaction with the ball? a. More information is needed to determine how you should maximize your speed. b. It doesn't matter since your ...
  83. science

    Hans stands at the rim of the grand canyon and yodels down to the bottom. He hears his yodel echo back from the canyon floor 5.20 seconds later. Assume that the speed of sound in air is 340.0m per second. How deep is the canyon? Hint: Note that the time is for the sound to ...
  84. Trigonometry

    From the foot of a building I have to look upwards at an angle of 22degrees to sight the top of a tree. From the top of a building, 150 meters above ground level, I have to look down at an angle of depression of 50degrees to look at the top of the tree. a. How tall is the tree...
  85. Spanish please help

    Will somebody please help. Thank You so much. 19. Say that the person has his/her/their own book or books. Yo tengo ______ libro. 20. Say that the person has his/her/their own book or books. Ella tiene ______ libros. 21. Say that the person has his/her/their own book or books...
  86. Physics

    A wooden block of mass m = 9 kg starts from rest on an inclined plane sloped at an angle θ from the horizontal. The block is originally located 5m from the bottom of the plane. If the block, undergoing constant acceleration down the ramp, slides to the bottom in t = 2 s, ...
  87. Math

    You spin the spinner once (1-6) and roll a number cube (1-6) once. Find the probability that the spinner stops on the same number that you roll with the number cube.
  88. Calculus

    A travel agency currently has 80plp signed up a tour. The price of a ticket is $5000 per person. The agency has chatered a plane seating 150 plp at a cost of $250000. Additional costs to the agency are incidental fees of $300 per person. For each $30 that the price is loverwd...
  89. medical terminology/exercise science terminology

    how does the body adapt to aerobic exercise a.by increasing blood pressure when a person isn't exercising b.by increasing the heart rate when a person isn't exercising c.by decreasing the heart rate when a person isn't exercising d.by decreasing blood pressure when a person ...
  90. tax

    If the proceeds of a pension plan are being distributed and the original beneficiary dies, the: A. person who inherits the plan assets can elect to be treated as the original beneficiary if that person is the spouse of the original beneficiary. B. person who inherits the plan ...
  91. Language

    One particularly nice afternoon, several students were trapped in a classroom listening to a monotonous lecture by a professor the local college. After over two hours of mind-numbing discourse, one student stood up in despair and noted that she had a book with every word of ...
  92. English

    I REALLY need help in this Double Shift word problem by Gloria Rosenthal. The following real or fictional people all "do" or "did" something; their activities are dependent on their names. From each clue, identify the person, take their first name or surname (whichever one ...
  93. English

    I REALLY need help in this Double Shift word problem by Gloria Rosenthal. The following real or fictional people all "do" or "did" something; their activities are dependent on their names. From each clue, identify the person, take their first name or surname (whichever one ...
  94. Math

    Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: w=Cr^-2 , where C is a constant...
  95. GEOMETRY

    A cylindrical tank if 8 ft. in diameter and 20 ft tall. how many gallons of paint are needed to paint the tank if one gallon covers 200 sq ft ? and a cylindrical hole with diameter 8 inches is cut through a cube 10 in. on a side. find the surface area of this solid HOW PLEASE...
  96. PHYSÝC HELP

    A standard CD has a diameter of 12.0 cm, and a hole that is centered on the axis of symmetry and has a diameter of 1.50 cm. The CD’s thickness is 1.2 mm, and it's mass is 17 g. If a (very thin) pin extending through the hole of the CD suspends it in a vertical orientation, ...
  97. PHYSÝC

    A standard CD has a diameter of 12.0 cm, and a hole that is centered on the axis of symmetry and has a diameter of 1.50 cm. The CD’s thickness is 1.2 mm, and it's mass is 17 g. If a (very thin) pin extending through the hole of the CD suspends it in a vertical orientation, ...
  98. physics

    A standard CD has a diameter of 12.0 cm, and a hole that is centered on the axis of symmetry and has a diameter of 1.50 cm. The CD’s thickness is 1.2 mm, and it's mass is 17 g. If a (very thin) pin extending through the hole of the CD suspends it in a vertical orientation, ...
  99. physics

    A uniform plank of length 5.6 m and weight 203 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 440 N walk on the overhanging part of the plank before it just begins to ...
  100. math

    John goes to the store to buy some school supplies.He byus a stapler for $6.32, staples for $3.75, pencils for $2.00, and 2 packs of erasers for $0.99 each. He must pay $0.07 tax for every ($1.00)dollar he spends. How much does John have to pay in all? What is the total tax ...
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