1. Physics

    Hot air balloons float in the air because of the difference in density between cold and hot air. In this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. To do this, use the following variables and make these ...
  2. Chemistry

    A 1.516 M solution is made by dissolving 1.570 g of the compound in 0.2238 mol of water. Determine the molar mass and apparent molecular formula of the compound.
  3. sewing.

    can someone tell me if my answers are correct or not? thank you :) If your sewing machine were skipping stitches,wat would u check first? A.bobbin stitches B.needle setting C.thread type D.tucker my answer:A How do you secure the beginning and end of every seam? A.add a double...
  4. Calculus

    A dose, D, of a drug causes a temperature change, T, in apatient. For C a positive constant, t is given by T=((C/2)-(D/3))D^3. (a) What is the rate of change of temperature change with respect to dose. (b) For what dose does the temperature change increase as the dose ...
  5. Kindergarten Math

    what is counter? My child has to draw a piece of yarn 3 counters long over the top needle, 4 counters long over the middle neddle and 5 counters long over the bottom needle! But I don't know what a counter is!
  6. physics

    A w1 = 255 N bucket is lifted with an acceleration of a = 2.00 m/s2 by a w2 = 105 N uniform vertical chain. A.Find the tension in the top link of the chain. B.Find the tension in the middle link of the chain. C.Find the tension in the bottom link of the chain.
  7. Geoemtry

    A picture frame has a square picture in the center of the frame, the top and bottom borders are each 2 inches wide and the left and right borders are each 4 inches wide. What is the value of x if the total area of the picture frame is 65.25 inches
  8. medical law and ethics

    what is the legal relationship formed between when one person agrees to perform work for another person?
  9. psychology

    Evaluations of a particular belief, person, object, or idea describe a person’s: attitudes motivation predispositions biases
  10. psych

    Evaluations of a particular belief, person, object, or idea describe a person's : a. Attudes b. Motivation c. Predispositions d. Biases
  11. English

    In the fairy tale Sleeping Beauty... there is person vs person. What is the reasoning behind the royal family vs. the god mother?
  12. Physica

    A person wajks on astraight road for 100 m and then return back for 20 m .The ratio of the magnitude of the distance to the displacement of the person is....
  13. physics

    If the intensity of a person’s voice is 3.6×10−7 W/m2 at a distance of 2.1 m, how much sound power does that person generate? Answer in units of W
  14. science

    a person rolled a large ball across a field. What information is needed t determine how much work the person did?
  15. stem

    a person weighing 65kg walks up steps that are 20cm high how much work does the person do going up each step
  16. chemistry

    If the unknown tri protic acid has an equivalent weight of 139.42 g/equiv, its average molecular weight is _________g/mol and __________g would be required to make 100.00 mL of a 1.50 N solution. See my response to your first question.
  17. Physics

    Some cooking pan whose bottom is made out of copper has a radius 0.1 m and thickness 0.003 m. The water in the pan boils at 1.7e-3 kg/s. How much higher is temperature of the outside surface of the pan's bottom compared to the inside surface?
  18. Math

    The bottom of the ladder on a horizontal flat surface rests against a wall. It makes an angle of elevation of 35°. The bottom of the ladder is 42 ft from the base of the wall. How long is the ladder? Round your answer to the nearest whole number. Do not include units.
  19. calculus (optimization prob help!)

    Imagine a flat-bottomed cylinderal container with a circular cross section of radius 4 in. a marble with radius 0<r<4 inches is placed in the bottom of the can. what is the radius of the bottom that requires the most water to cover it. (include first or second derivative...
  20. please help! someone plz

    Imagine a flat-bottomed cylinderal container with a circular cross section of radius 4 in. a marble with radius 0<r<4 inches is placed in the bottom of the can. what is the radius of the bottom that requires the most water to cover it. (include first or second derivative...
  21. calc(very urgent)

    Imagine a flat-bottomed cylinderal container with a circular cross section of radius 4 in. a marble with radius 0<r<4 inches is placed in the bottom of the can. what is the radius of the bottom that requires the most water to cover it. (include first or second derivative...
  22. 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 Law: elongation= force...
  23. physics

    A star of mass 2.0 1031 kg that is 4.8 1020 m from the center of a galaxy revolves around that center once every 4.2 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has a mass equal to that of this star, and the ...
  24. math

    In a question paper, there are 150 questions, each question carrying 2 marks. The total marks are 300. For every wrong answer 0.50 marks will be deducted from the scored marks. If a person has to score 270 marks in a paper, how many questions should be answered correctly?
  25. Science

    Five groups of rats are fed identical diets except for the amount of vitamin A that they receive. Each group gets a different amount. After three weeks on the diet, the rats are weighed to see if the amount of vitamin A received has affected their weight. Independent Variable...
  26. english

    Can somebody help me restate my thesis please. statement for the conclusion. My thesis is: An analysis of the literary devices in Katy Perry " Fireworks" and Miley Cyrus " The Climb" reveals Miley Cyrus creates a better argument for how every person is an exclusive individual ...
  27. math

    The diameter of an electric cable is normally distributed, with a mean of 0.9 inch and a standard deviation of 0.02 inch. What is the probability that the diameter will exceed 0.92 inch? (You may need to use the standard normal distribution table. Round your answer to three ...
  28. Math

    The diameter of an electric cable is normally distributed, with a mean of 0.6 inch and a standard deviation of 0.03 inch. What is the probability that the diameter will exceed 0.63 inch? (You may need to use the standard normal distribution table. Round your answer to three ...
  29. Geometry

    A circular flower bed is sectioned off. The arc intercepted by the 120 degree central angle is to be bordered with marigolds. The garden has a diameter of 63 inches. Circumference = Pi * diameter, Pi = 22/7. If you plant the marigolds about eight inches apart what is the least...
  30. physics

    An aboveground pool is 5ft tall with a diameter of 40 ft is filled with water in 50 minutes. How long will it take to fill an aboveground pool that is 6ft tall with a diameter of 36 ft?
  31. physics

    An aboveground pool is 5ft tall with a diameter of 40 ft is filled with water in 50 minutes. How long will it take to fill an aboveground pool that is 6ft tall with a diameter of 36 ft?
  32. physics

    An aboveground pool is 5ft tall with a diameter of 40 ft is filled with water in 50 minutes. How long will it take to fill an aboveground pool that is 6ft tall with a diameter of 36 ft?
  33. Physics

    A circular hole in an aluminum plate is 2.725 cm in diameter at 0.000 degrees celsius. What is its diameter when the temperature of the plate is raised to 100.0 degrees celsius?
  34. maths

    two pulley rotate at 150 rpm and 300 rpm. the diameter of the larger pulley 15cm if the pulley are connected by belt . what is the diameter of the smaller pulley.
  35. Geometry

    Average diameter of about 7900 miles. Jupiter has an average diameter of 86900 miles. The volume is Jupiter is approximately how many times larger than the earth?
  36. math

    circle O has a diameter D and circle P has a diameter d. the two circles are externally tangent. find the length of the common external tangent in terms of the circles' diameters
  37. physics

    A person of mass m jumps off the ground. Suppose the person pushes off the ground with a constant force of magnitude F for T seconds. What was the magnitude of the displacement of the center of mass of the person while they were in contact with the ground? Express your answer ...
  38. 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 to the new point and...
  39. 6th grade math

    My son has this homework and I am all confused... the paper says to think back to the experiment you just designed to test the Best Wheels Bike Shop's new super titanium wheel bearings. He did not do this experiment which leads me to believe this is just a statement for the ...
  40. physics

    Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.5×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 8.0 .
  41. Physics

    Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.1×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 7.7 .
  42. math

    a rectangular swimming pool is 15 yds x 25 yds. the bottom of the pool needs to be repainted. if it costs $4.25 per square foot to paint the pool, give the cost to repaint the bottom of the pool.
  43. MATH

    If I had one clock that chimes every half hour and the other every 15-minutes and they both chimed together at 1. the next time they will chime to gether will be two oclock pm
  44. Health

    Indirectly affected person 1 or group 1 when mountain climbing unprepared please help and thank you person 1 or group 1 means first person or group to be indirectly affected
  45. science

    Which statement best describes the inertia of an object? A.Inertia is the tendency of an object to resist a change in its motion. B.Inertia is the weight of an object. C.Inertia is what determines how fast an object will fall. D.Inertia measures how hard an object will hit ...
  46. physics

    A cylinder is fitted with a piston that is connected to the bottom by a spring. The spring has a spring constant of k = 3600 N/m. The cylinder is open to air at the top and is frictionless. The radius of the cylinder is 25 mm and the piston has negligible mass. The air beneath...
  47. Can't submit follow up questions or thank the tutor

    I can't submit a follow up question or thank the tutor after an answer or a response is posted by a tutor,as the "post answer" button not available in the bottom of the form,as it used to be. I tried reopening,refreshing the browser and switching the browser. Is this a new ...
  48. Math

    Lora's gymnastics class practices floor exercises every other day. The class practices on the balance beam every third day, the uneven bars every fourth day. Today is March 10, and the class practiced all 3 events.How many more times, before June 1, will the class practice all...
  49. marketing research

    A packaging device is set to fill detergent power packets with a mean weight of 5 Kg. The standard deviation is known to be 0.01 Kg. These are known to drift upwards over a period of time due to machine fault, which is not tolerable. A random sample of 100 packets is taken and...
  50. english

    Which change, if any, should be made to this sentence? "Though more snow is expected, she can make it through, and she'll deliver the supplies." Delete both commas,change commas to semicolons, or make no change.
  51. Math

    The revenue obtained from the sale of q units of a product is given by : R= 30q-(0.3q^2) A) How fast does R change with respect to q when: q=10 B) Find the relative rate of change of R, and to the nearest percent, find the percentage rate of change of R.
  52. math

    The queen asked her cook how many guests had attended a recent banquet. “I do not know, my lady” he said, “but every two guests shared a plate of fruit between them, every three used a bowl of broth among them, and every four shared a platter of beef. I used 65 serving ...
  53. writing

    We also prepared for the test by studying the driver's booklet, memorizing rules, and to learn road signs. What correction should be made to this sentence? 1) change prepared to prepare 2) change studying to study 3) change driver's to driver 4) remove the comma after booklet ...
  54. Physics

    High-heeled shoes can cause tremendous pressure to be applied to the floor. Suppose the radius of a heel is 6.00 10-3 m. At times during a normal walking motion, nearly the entire body weight acts perpendicular to the surface of such a heel. Find the pressure that is applied ...
  55. U.S. Government

    1. Amendment -- gave all men the right to vote regardless of race. - 15? 2. People who believe voting is important have high political ----c-c-. - efficacy? 3. It is an essential part of democracy in action, for the people to ---e. - vote? 4. The age requirement to vote in the...
  56. Physics

    A marble rolls down an incline of 30 degrees. If the marble is initally at rest at the top of the incline of length 2.0 meters what will the speed of the marble be at the bottom of the incline (a) if the incline is rough enough to prevent any slipping [ it rolls],then (b) if ...
  57. Literature

    Please check the questions about the tragedy Romeo and Juliet below. 1.Friar Laurence could best be described as: A. a very mean person B. a happy person C. someone who likes to please people I would say C as he did whatever Romeo and Juliet asked him to do. 2. Romeo could be ...
  58. physics

    Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.4×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 7.9cm.
  59. No Subject

    Ms.Sue, I just wanted to take a few moments to let you know that I recently completed my work in Early Child Ed. I want you to know that I truly do appreciate all the help you have given me,and let me say "thank you"for being patient with me while I was trying to understand ...
  60. 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 to place this, ...
  61. statistics/probability

    QUESTION- machines are used to pack sugar into packets supposedly containing 1.20kg each.on testing a large number of packets over a long perodof time ,it was found that the mean weight of the packets was 1.24kg and the standard deviation was 0.04kg. a particular machine is ...
  62. social studies

    Is morality is a Social Function (Construction)? This would imply that there is no such thing as REAL morality only the morality that society forces us to follow (both consciously and unconsciously). Use examples to explain your case. [ WARNING: If you do agree with this ...
  63. Physical Science

    Hello! Thanks for checking my question out! ____ 2. Which of the following is NOT a clue that a chemical change has occurred? (1 point) a) change in color b) production of a gas c) formation of a precipitate d) change in shape My Answer: D Could someone please check my answer...
  64. geometry

    you are at a parade looking up at a large balloon floating directly above the street. you are 60 feet away from a point on the street directly Beneath the balloon. to see the top of the balloon your angle of elevation is 53°. to see the bottom of the balloon your angle of ...
  65. Science

    When a nonzero net force acts on an object the force A.changes the motion of the object B.Must be greater than the reaction force C.Does not change the motion of the object D.is equal to the weight of the object
  66. english

    Which of the following would most likely be an entry in a sentence outline? A. Education beyond high school versus education beyond college B. Education as a pathway C. Education as a tool D. Education can change a person's life.
  67. Physics

    A) On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), 6.00 m away from your sailboat in the horizontal direction. When you are 2.20 m below the surface, the top of the sailboat mast appears to you to be in a direction 36.0° from vertical. Calculate the ...
  68. physics

    A panel is supported on supports a and b. A 60-kg person walks on the board from point a. Despise the deformation of the table A) find its expression for the magnitude of the force exerted by each support in function x of the person B) in what position will the person be found...
  69. physics

    A panel is supported on supports a and b. A 60-kg person walks on the board from point a. Despise the deformation of the table A) find its expression for the magnitude of the force exerted by each support in function x of the person B) in what position will the person be found...
  70. Math, check my answer. thanks

    Consider the following students’ methods of solving the Proportion 8/5 = 20/x and determine whether the methods were correct: Richie: First I divided 20 by 8 and got 2 1/2 Then I multiplied by 5 and got 12 ½ for my answer. Martha: I think of it this way. Every time a person...
  71. Goodwill valuation - Accountancy

    In case of Admission: Given a balance sheet as at 31 Dec 2008. The new partner was admitted on 1 Jan 2009. Goodwill was agreed at 2 years purchase and was to be valued in accorfance to the weighted average gross profit method for the previous four years starting from this year...
  72. calculus

    The chemistry teacher at Stevenson High School is ordering equipment for the laboratory. She wants to order sets of five weights totaling 121 grams for each lab station. Students will need to be able to weigh every integral weight from 1 to 121 grams using these weights and a ...
  73. Trigo

    From a window of a building A, the angle of elevation of the top of building B is 35 degrees and the angle of depression of the bottom of building B is 20 degrees. If the buildings are 25m. horizontally apart, Compute for height of the window from the ground? And compute for ...
  74. calculus

    Melissa wants to make a rectangular box with a square base and cover its top and bottom faces with velvet, which will cost her $3 per square inch, and the sides with silk, which will cost her $5 per square inch. The box should have a volume of 1600 cubic inches. Find the ...
  75. Math: Calculus

    The max. weight M that can be supported by a beam is jointly proportional to its width w and the square of its height h, and inversely proportional to its length L. a) write an equation that expresses the proportionality. b) determine the constant of proportionality if a beam ...
  76. Calculus

    Points (–1, 6) and (–3, 2) are endpoints of the diameter of a circle. (a) What is the exact length of the diameter? (Simplify as much as possible) Answer: ________ (b) What is the center of the circle? Answer: ____________ (c) What is the equation of the circle? Answer: ...
  77. Physics

    In a huge oil tanker, salt water has flooded an oil tank to a depth of h2 = 4.50 m. On top of the water is a layer of oil h1 = 7.55 m deep, as in the cross-sectional view of the tank as shown in the figure. The oil has a density of 0.700 g/cm3. Find the pressure at the bottom ...
  78. English

    I am trying to write a paper but I am having a difficult time understanding the way you use first person in APA style. The instructions are: Use APA format- For this assignment you may use first person and use the questions as subheadings. I need and example of using first ...
  79. Analytic Geometry(Math)

    a person 6 ft. tall s standing near a street light so that he is 4/10 of the distance from the pole to the tip of his shadow. How high above the ground is the light bulb? if the person's head is exactly 5ft from the light bulb. how far is the person from the pole and how long ...
  80. programming

    write a C++ program to read the data from a file and put in a 2d array. This data contains the details of each sales person records. After the details are read and inserted, now calculate the grand total of each sales person and find out the sales person of the month.
  81. Math

    Person A starts walking SW froma point at a speed of 13m/s. Ten seconds later person B starts walking from the same point and travels east at 10m/s. After person B have been walking 30 seconds, approximately how far apart are the two?
  82. Math

    Determine which function has the greater rate of change in this question? These are the points on the graph. A. (-1,0), B(0,1) C(1,2) This is the table X, -1,0,1,2 Y, 0,1,2,3 A. The rates of change are equal. B. The graph has a greater rate of change. C. The table has a ...
  83. English

    Please check ! 1) Who told you that, asked Jerry? "Who told you that?" asked Jerry. 2) Who said, “A penny saved is a penny earned” Who said, "A Penny saved is a penny earned?" 3) Jack told me that I will have to get a job before this summer. Jack told me that "I will have ...
  84. math/probability

    Assume that the weight loss for the first two months of a diet program has a uniform distribution over the interval 6 to 12 pounds. Find the probability that a person on this diet loses more than 11 pounds in the first two months.
  85. Math

    a ladder 10 ft long rests against a vertical wal. if the bottom of the ladder slides away from the wall at a rate of 0.7 ft/s, how fast is the angle between the ladder and the ground changing when the bottom of the ladder is 6 ft...
  86. Literature

    I am writing a book report on Gulliver's Travels in which I have to compare myself with one of the characters. I have chosen Lemuel Gulliver, and I need an attention getter. This is what I have "Every once in a while we run on to characters in literature that reminds us of ...
  87. Physics

    Consider the rods plus disc system shown in the Figure. The rod has a length L =0.50 m, and mass M = 0.270kg. The large disc has a radius of R = 0.130m and mass m=0.810kg. The second disk should be treated as a point mass of 0.405kg. It is glued to the rod at position X = 0....
  88. Chemistry

    Does the molarity change with the volume? For example we did an experiment in lab with one trial containing 0.1 M KI at 100 mL and another with 50mL. So does the molarity (M) change with volume change?
  89. Algebra

    The Pi (π) Club at Math High School was planning a fundraiser to sell pepperoni pizza. A pizza company donated enough ingredients to make the equivalent of 300 extra large pepperoni pizzas (16” diameter). In trying to determine the number of pizzas of each size to make...
  90. Math- Completely confused!

    Simplify each expression (where possible) and write the answer without using negative or fractional exponents. Assume that X>0. a. 8x^(1/3) b. (-8x)^(1/3) c. (8x)^(-1/3) d. (3x^(3/4))(16x)^(1/4) e. (x^(1/2)) / (x^(5/2) so far my answers are : a.2x b. -2x c.1/2x but i feel ...
  91. Geometric series

    The sum of the first n terms of the geometric sequence -1, -3, -9,... is -3280. Find the value of n. Express answer in simplest fractional form. 1. t1= -1 2. r = 3 3. S6 = I got -364 but it's not the right answer 4. n = I keep getting a decimal number: 18.72075441...
  92. Physics Gravitation Weight

    What will a spring scale read for the weight of a 75-kg woman in an elevator that moves upward with acceleration of 0.30-g? Unsure of how to solve this problem. Can someone please walk me through it step by step. Thank you
  93. Science physics

    A uniform metres rod of weight 100N carries a weight of 40N and 60N suspended from the 20Cm and 90cm marks respectively, where will your pivot a knife edge to balance the rod.
  94. Chemistry

    Five year old Andrew weighs 45 lbs and requires insulin. His doctor has prescribed 0.150 units of insulin/kg body weight/hr while he is in the hospital. The insulin bottle you have possesses a concentration of 20.0 units/15.0 ml and all must be given. Give all answers to three...
  95. math word problems

    A ladder is leaning against a building. The distance from the bottom of the ladder to the building is 9 ft less than the length of the ladder.how high up the side of the building is the top of the ladder if that distance is 2 ft less than the length of the ladder? the ladder ...
  96. Math

    A page of a certain book is 12 inches high and 8 inches wide. The top and bottom margins on the page are each 2 inches wide, and the side margins are each 1 inch wide. The area on the page available for printing is what percent of the total area of the page? a. 30% b. 35% c. ...
  97. math

    a brick is placed on a balance scale.it balances exactly with a 3/4 pound weight and 3/4 of a brick .what is the weight of the brick? show and explain work
  98. physics

    A boulder in a river has weight of 65N. It displaces a volume of water with a weight of 10N. Which is the net force on this rock? 55 N down 65 N down 75 N up 75 N down
  99. physics

    a 500g balance weight is transported to the surface of planet z where an objects weight is measured to be 5.00N. The radius of the planet is 5.0x10^5m. What is the mass of planet z?
  100. Statistics

    The weight of 100 females aged 15 to 20 years has a mean of 120 pounds and a variance of 36 pounds. How many of the students has a weight less than 110 pounds?
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