Popular questions and responses by claire
  1. Science

    Which of the following electromagnetic waves is not used for communication?

    asked on November 23, 2014
  2. word problem math

    Dixon and his little sister Ariadne stand next to each other on the playground on a sunny afternoon. Their mother measures their shadows. Dixon's shadow is 18 feet long and Ariadne's shadow is 15 feet long. If Dixon is 6 feet tall, how tall is Ariadne?

    asked on November 16, 2015
  3. Algebra

    Lesson 10: Quadratic Functions and Equations Unit Test answers please! I need the right ones

    asked on April 12, 2019
  4. math

    Arianna has a large piece of fabric that she wants to use to make some scarves. The number N of scarves she can make is inversely proportional to the area A of each scarf. If the area of each scarf is 3 square feet, then she can make 15 scarves. If the

    asked on May 12, 2016
  5. Maths: Partial Differentiation

    1) If x = rcos theta and y = r sin theta, show that partial r / partial x = cos theta and find partial theta / partial x. 2) If z = sin theta.sin phi.sin gamma, and z is calculated for the values theta = 30degrees, phi = 45 degrees and gamma = 60degrees,

    asked on January 9, 2010
  6. Engineering Kinematic

    The particle travels along the path defined by the parabola y=0.5(x^2). If the component of velocity along the x-axis is v=5t [m/s], determine the particle's distance from the origin and the magnitude of its acceleration when t=1s. The initial condition is

    asked on October 16, 2010
  7. Chemistry

    So I'm not exactly sure how to answer this problem. NaC2H3O2 is soluble Express your answers as ions separated by a comma. If the compound is not soluble, enter noreaction

    asked on November 13, 2012
  8. Geometry Question (multiple choice)!

    The isosceles trapezoid is part of an isosceles triangle with a 34° vertex angle. What is the measure of an acute base angle of the trapezoid? Of an obtuse angle? 73°; 107° 34°; 146° 73°; 146° 34°; 107° Thank you =) :) ;)

    asked on January 10, 2012
  9. Calculus

    The base of an isosceles triangle is 8 feet long. If the altitude is 6 feet long and is increasing 3 inches per minute, are what rate are the base angles changing?

    asked on May 11, 2016
  10. Math

    Which of the following problems would NOT have a solution? Five pizzas are shared equally among four people, and you want to know how much each person gets. Ten pizzas are shared equally among five people, and you want to know how much each person gets.

    asked on November 10, 2015
  11. physics

    Surprisingly, very few athletes can jump more than 2.0 ft (0.62 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.0 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.

    asked on March 1, 2011
  12. math

    The clock face in a famous clock tower has a radius of about 5 meters. What is the area of the clock face to the nearest square meter? Use 3.14 as an approximation for pi.

    asked on May 10, 2016
  13. Computer Programming

    /* Develop a C program that will determine if a department store customer has exceeded the credit limit on a charge account. For each customer, the following facts are available: a) account number b) Balance at the beginning of the month c) Total of all

    asked on November 22, 2009
  14. history

    Why is it difficult for an oppressive government to enforce a policy of digital censorship? (Select all that apply.) a. The Internet's design reads blockage as damage and self corrects b. All people have to sleep, but the internet is a 24 hour operation c.

    asked on August 2, 2019
  15. chemistry

    Question: Consider this molecular-level representation of a gas. There are: 5 orange gas particles 6 blue gas particles 3 green molecules of gas (two particles attached together) If the partial pressure of the diatomic gas is 0.510 atm, what is the total

    asked on December 8, 2013
  16. Math

    Tickets for a play cost Php 250 for adults and Php 200 for children.The sponsor of the show collected a total amount of not more than lhp 44,000 from more than 150 adults and children who watched the play. A. What mathematical statements represents the

    asked on September 13, 2017
  17. Math

    A flying disc has a radius of 7 inches. What is the area of one side of the flying disc to the nearest square inch? Use 3.14 as an approximation for pi.

    asked on February 18, 2016
  18. history

    Which are true of the Great Pacific Garbage Patch? (Select all that apply.) a. It's made up of tiny bits of plastic b. It's spread out over different regions of the Pacific Ocean c. It's possibly twice the size of the continental United States d. It's made

    asked on August 2, 2019
  19. Math

    Dawn raises money for her school in a jog-a-thon. She will get three dollars for every lap she completes. If it takes 4 laps to jog 1 mile, and Dawn jogs a total of 12 miles, how much money will Dawn raise for her school?

    asked on November 6, 2015
  20. Calculus

    A conical cistern is 10 ft. across the top and 12 ft. deep. If water is poured into the cistern at the rate of 1 cubic foot per second, how fast is the surface rising when the water is 8 ft. deep?

    asked on May 2, 2016
  21. Physics

    A 20.0 kg box rests on a table. what is the weight of the box and the normal force acting on it? A 10.0 kg box is set on top of the 20.0kg box. Determine the normal force that the table exerts on the 20.0kg box and the normal force that the 20.0kg box

    asked on September 3, 2009
  22. math

    Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 150 more points than Katie. If you let l= the number of points that Lisa scored, and k= the number of points that Katie scored, then the problem can be

    asked on May 18, 2016
  23. adding integers

    A stock lost 7 1/8 points on Monday and then another 1 7/8 points on Tuesday. On Wednesday, it gained 13 points. What was the net gain or loss of the stock for these three days? A) a loss of 22 points B) a gain of 4 points C) a gain of 18 1/4 points D) a

    asked on April 13, 2016
  24. math

    The diameter of a hydrogen atom is about 5×10^-11 meter. Suppose 8.4×10^8 hydrogen atoms were arranged side by side in a straight line. Multiply these numbers to find the length of this line of atoms. What is the length in scientific notation?

    asked on May 19, 2016
  25. Math

    An auditorium contains 315 occupied seats and was 7/9 filled. How many empty seats were there?

    asked on September 28, 2015
  26. Calculus Antiderivative Problem

    An object moves along a coordinate line with acceleration a(t)=(t+2)^3 units per second per second. a). The initial velocity is 9 units per second. The velocity function is v(t) = b).The initial position is 2 units to the right of the origin. The position

    asked on November 8, 2013
  27. math

    The volume of Jupiter is about 1.43*10^15 cubic kilometers. The volume of Earth is about 1.09*10^12 cubic kilometers. The number of Earths that can fit inside Jupiter can be found by dividing Jupiter's volume by Earth's volume. Find this quotient and

    asked on May 19, 2016
  28. Fluid Mechanics

    A cylindrical tank 2m diameter and 4m long with its axis horizontal, is half filled with water and half filled with oil of density 800kg/m^3. Determine the magnitude and position of the net hydrostatic force on one end of the tank. The answers should be

    asked on November 3, 2010
  29. Math

    On an average day, 34 customers buy a bag of grapes at Jerry's Market. There are an average of 47 grapes in each bag. Round to the nearest ten and then multiply to estimate the number of grapes Jerry's customers buy every day.

    asked on November 6, 2015
  30. physics

    The Navstar Global Positioning System (GPS) utilizes a group of 24 satellites orbiting the Earth. Using "triangulation" and signals transmitted by these satellites, the position of a receiver on the Earth can be determined to within an accuracy of a few

    asked on November 19, 2018
  31. math

    Arianna has a large piece of fabric that she wants to use to make some scarves. The number N of scarves she can make is inversely proportional to the area A of each scarf. If the area of each scarf is 3 square feet, then she can make 15 scarves. If the

    asked on May 12, 2016
  32. Math

    In science class, Savannah measures the temperature of a liquid to be 50^@ Celsius. Her teacher wants her to convert the temperature to degrees Fahrenheit. What is the temperature of Savannah's liquid to the nearest degree Fahrenheit?

    asked on November 16, 2015
  33. Fluid Mechanics

    A circular disc having a diameter of 125cm is immersed in water so that the distance of its perimeter measured vertically below the water surface varies between 60cm and 150cm. Find the total force due to the water acting on one side of the lamina, and the

    asked on October 31, 2010
  34. math

    Which statements are true for irrational numbers written in decimal form? A. Irrational numbers are nonterminating. B. Irrational numbers are repeating. C. Irrational numbers are nonrepeating. D. Irrational numbers are terminating.

    asked on April 19, 2016
  35. Chemistry 121

    What is the lewis dot structure of C2H5F?

    asked on October 21, 2011
  36. math

    A flying disc has a radius of 6 inches. What is the area of one side of the flying disc to the nearest square inch? Use 3.14 as an approximation for pi. A) 113 square inches B)452 square inches C)38 square inches D) 28 square inches

    asked on May 9, 2016
  37. history

    Which explain elements that contribute to the success of virtual markets over brick-and-mortar stores? (Select all that apply.) a. Customers can engage in online shopping 24 hours a day b. The procedure for returns and exchanges is done by mail c. Shoppers

    asked on August 2, 2019
  38. English (phrasal modals)

    Zach used to work at an independent record label. Negotiating could be exciting, but he was supposed to slant everything in the label’s favor. Some reps used questionable tactics. He couldn’t look at himself in the mirror if he treated people like

    asked on November 19, 2013
  39. chemistry

    A backpacker carries 3.0L of white gas as fuel for her stove. How many pounds does the fuel add to her load? Assume the density of white gas to be .79 g/cm^3

    asked on September 11, 2012
  40. algebra

    Determine the x-intercept and y-intercept of 3x - 6y = 12.(Points : 2) (9, 0) and (0, -3) (4, 0) and (0, -2) (-4, 0) and (0, 4)

    asked on February 3, 2012
  41. Physics

    In Figure 10-20, the magnitude of the force necessary to stretch a spring is plotted against the distance the spring is stretched. Figure 10-20 (a) Calculate the slope of the graph, k, and show that F = kd, where k = 25 N/m. (b) Find the amount of work

    asked on October 25, 2011
  42. physics

    A ball rolls down a hill mainly because of: a. an unbalanced torque b. an unbalanced force c. its rotational inertia d. angular momentum I think it is d - but I am unsure. Any advice?

    asked on July 22, 2008
  43. Chemistry Chemical Reactions pls help <3

    2AgNO3 + CaCl2 ---> Ca(NO3)2 + 2AgCl all of the substances involved in this reaction are soluble in water except AgCl which forms a solid at the bottom of the flask . Suppose we mix together a solution containing 12.6 g of AgNO3 and one containing 8.4 g of

    asked on January 13, 2016
  44. Math

    Which is the best approximation of the volume of a cylinder with a radius of 10 mm, and a height of 5 mm? Use 3.14 for pi.

    asked on February 2, 2016
  45. ALGEBRA! URGENT. Check Answers!

    1. 18x^2 + 6 + 4x - 15x^2 - 4 + 13x Answer: 3x^2 + 17x + 2 2. 3x^2 + 6 - 2x + 5x - 4x^2 + 9 Answer: -x^2 + 3x + 15 3. 3x^2 + 5x - 7x + 3 - 5x^2 + 2 Answer: -2x^2 + 2x + 5 4. In the expression -7x - 3x^2 + 5. What is the coefficient of x? Answer: I think

    asked on May 27, 2014
  46. word problem math

    Keith has p pennies, n nickels, and d dimes in his pocket. The total number of coins is 9. The expression 0.01p+0.05n+0.10d0.01p+0.05n+0.10d represents the value of the coins, which is equal to $0.53. He has two fewer nickels than dimes. How many pennies

    asked on May 17, 2016
  47. physics

    Three charged particles are placed at the corners of an equilateral triangle of side d = 1.40 m (Fig. 16-53). The charges are Q1 = +4.0 µC, Q2 = -7.0 µC, and Q3 = -6.0 µC. Calculate the magnitude and direction of the net force on each due to the other

    asked on January 30, 2012
  48. physics

    You know that you can safely stand on the hang-over end of a heavy plank that rests on a table. How far depends on your mass and the mass of the plank. Suppose you can stand on the end of a plank that overhangs the edge of the supporting table 1/4 its

    asked on July 22, 2008
  49. chemistry

    What is the pressure in millimeters of mercury of 0.0115mol of helium gas with a volume of 211ml at a temperature of 25 degrees celsius? Ok so I've come up with many different answers but none are right. You convert the mL to L and the temperature to

    asked on February 20, 2013
  50. mathematic

    The local skateboard company reports that when they produce and sell n skateboards in a week, the cost is represented by the modelc=850+76n . The revenue is represented by the model r=150n. If both C and R are in dollars, write an equation for the profit

    asked on September 30, 2014
  51. Chemistry

    A sample of gas (2.0 mmol) effused through a pinhole in 5.0 s. It will take __________ s for the same amount of to effuse under the same conditions.

    asked on December 31, 2014
  52. Physics

    What is the magnitude of the acceleration of a speck of clay on the edge of a potter's wheel turning at 44 rpm (revolutions per minute) if the wheel's diameter is 31 cm?

    asked on November 19, 2018
  53. Phonemes

    I just wanted check my phonemes' division cow -c/ow (2 phonemes) tree- t/r/E (3) shopping - sh/o/p/i/ng (5) matter - m/a/t/e/r/ (5) gutters- g/u/t/e/r/s (6) horse h/o/r/se (4) car- c/a/r (3) chart /ch/a/r/t (4) see - s/e (2) saw- s/aw (2) sawing- s/aw/i/ng

    asked on March 12, 2013
  54. physics

    The headlights, radio, and defroster fan in an automobile are connected in a. series with a switch for each. b. parallel with a switch for each. c. series without separate switches. d. parallel without separate switches. any help would be appreciated -

    asked on July 21, 2008
  55. Chemistry

    How many moles of gas must be forced into a 4.8L tire to give it a gauge pressure of 30.8psi at 30 degrees celsius? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5L so that the total pressure in the tire is

    asked on February 20, 2013
  56. Biology

    Okay, I need help. "If short hair (L) is dominant to long hair (l), then what fraction of the offspring produced by a cross of Llxll will be homozygous dominant? a) 1/2 b) 1/4 c) 1/3 d) none (no change of this offspring) The key says that it's d, but when

    asked on November 17, 2009
  57. math

    Elimination was used to solve a system of equations. One of the intermediate steps led to the equation 9x=27 . Which of the following systems could have led to this equation? 4x+3y=24 −5x−3y=3 7x−2y=15 x+y=6 9x+2y=21 −9x−2y=21 10x−y=15

    asked on May 26, 2016
  58. Chemistry

    28.5g of iron shot is added to a graduated cylinder containing 45.50mL of water. The water level rises to the 49.10mL mark. From this information, calculate the density of the iron.

    asked on September 16, 2012
  59. Thermodynamics

    a rigid vessel of volume 1m(^3) contains steam at 20bar and 400 degrees Celcius. The vessel is cooled until the steam is just dry saturated. Calculate the mass of steam in the vessel, the final pressure of the steam and the heat rejected during the

    asked on March 12, 2010
  60. English

    The poem small passing by I grid de kok is free verse so has no structure, but I am not sure what sound device is used to creat rhythm and form? Please help

    asked on August 29, 2016
  61. Math

    Twice the difference of a number and 3 is at most 28.

    asked on January 6, 2020
  62. Chemistry

    The U.S. Food and Drug Administration lists dichloromethane (CH2Cl2) and carbon tetrachloride (CCl4) among the many cancer-causing chlorinated organic compounds. what are the partial pressures of these substances in the vapor above a mixture containing

    asked on October 18, 2010
  63. Math

    two boats leave the same port at the same time. one travels at a speed of 29 mph in the direction N 50 degrees E and the other travels at a speed of 35 mph in the direction S 70 degrees E. how far apart are the two boats after an hour.

    asked on October 28, 2015
  64. math

    What will the graph look like for a system of equations that has no solutions? A. The lines will be perpendicular. B. The lines cross at one point. C. Both equations will form the same line. D. The lines will be parallel. Is the answer B?? Thank you

    asked on April 30, 2015
  65. Math

    Jane is buying squid balls and noodles for her friends.Each cup of noodles costs Php 15 while each stick of squid balls costs Php 10.She only has Php 70 but needs to buy at least 3 stick of squid balls. A. Write a system of linear inequalities to model the

    asked on September 13, 2017
  66. Factor out the Greatest Common Factor (GCF)

    Factor out the Greatest Common Factor (GCF): 45d^3-18d^2

    asked on April 11, 2016
  67. math

    Why do you have to use estimation to find the number of triangles you need for the string? {could you please me I don't understand

    asked on November 14, 2015
  68. Math

    Dixon and his little sister Ariadne stand next to each other on the playground on a sunny afternoon. Their mother measures their shadows. Dixon's shadow is 18 feet long and Ariadne's shadow is 15 feet long. If Dixon is 6 feet tall, how tall is Ariadne?

    asked on January 4, 2016
  69. plz help math

    The formula for the force between two objects is F=GMm/r^2 where M and m are the masses of the two objects, G is a constant, and r is the distance between them. Solve the formula for m .m=Fr^2/GM m=r^2/FGM m=GM/Fr^2 m=FGM/r^2

    asked on May 26, 2016
  70. Math

    There are 50 lockers, numbered 1 throught 50, in a short hall at Phillips Middle School. Mr. Giannetti hid trears for his class in one of the lockers. He gave the class the following clues about the locker where the treats are located. Clue 1. The number

    asked on October 4, 2017
  71. Chemistry

    What happens when you mix ammonium chloride and sodium nitrate? I don't need any equations, just what would you see when you mix them together Thanks~

    asked on September 22, 2015
  72. Physics

    The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 46 m in a straight line, reaching a final speed of 83 km/h. (a) Determine the cheetah's average acceleration during the

    asked on September 14, 2012
  73. Thermodynamics

    A turbine operating under steady flow conditions receives steam at the following state: pressure 13.8 bar, specific volume 0.143 m^3/kg, specific internal energy 2591kJ/kg and velocity 30m/s. The state of steam leaving the turbine is as follows: pressure

    asked on June 3, 2010
  74. Geometry

    YW bisects angle XYZ. The measure of angle XYZ = 80 degrees. Find the measure of angle XYW

    asked on July 16, 2015
  75. atlantic

    A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will last less than 10 years?

    asked on April 6, 2017
  76. Calculus

    Identify the maximum and minimum values of the function y = 8 cos x in the interval [–2π, 2π]. Use your understanding of transformations, not your graphing calculator.

    asked on November 15, 2018
  77. math

    2 boats left the harbour at the same time. One travelled at 10km/h on a course of 47 degrees. from the north. the other travelled 8km/h on a course of 79 degrees. how far apart were the boats after 45 minutes to th nearest tenth of a kilometre.

    asked on December 8, 2012
  78. PreAlgebra

    A scale drawing of a town park has a scale of 1 inch : 100 feet. What is the actual length for each 1 foot on the drawing? Thanks!

    asked on December 12, 2011
  79. chemistry

    Please be specific! Briefly explain whether each if the following procedural errors would result in a high, low, or an unchanged calculated mass of Ca2+ in the analyzed tablet. a)a student had difficulty decanting the supernatant solution from the test

    asked on October 15, 2012
  80. American History

    What principles of American foreign policy did the Berlin airlift put into action? What do you think might have happened if the U.S. and Britain had not tried the airlift or if the airlift had failed?

    asked on March 17, 2013
  81. English III

    Hello there! (: If someone could proofread this summary for me that would so great! In Bob Herbert’s column, “Tweet Less, Kiss More” he addresses the negative impact technology’s left on society today. He states how it affects focus, safety, and

    asked on August 11, 2012
  82. Calculus

    Given that lim (4x − 2) = 2 x→1 illustrate Definition 2 by finding values of δ that correspond to ε = 0.5, ε = 0.1, and ε = 0.05. ε = 0.5 δ ≤ ε = 0.1 δ ≤ ε = 0.05 δ ≤

    asked on September 9, 2018
  83. Algebra 2

    Carla’s kitchen floor is in the shape of a perfect square. Her copycat brother, Carl, wants to re-model his kitchen so that it will have the same surface area as his sister, but his kitchen will be rectangular. The length of his floor is half the length

    asked on March 15, 2016
  84. Biology

    A bricklayer has an assistant who brings bricks to the bricklayer so she can build a wall. What part of translation most closely resembles the assistant's job? What do the bricks represent?

    asked on December 8, 2008
  85. Calculus

    Find the limit of the function algebraically. lim x approaches 0 (-7+x)/x^2

    asked on November 26, 2018
  86. physics

    Two charges separated by one meter exert 1 Newton forces on each other. If the magnitude of each charge is doubled, the force on each charge is ______ Newtons. Thanks!

    asked on July 20, 2008
  87. Math

    What is my number? Clue 1. My number is a perfect square. Clue 2. The only prime number in its prime factorization is 2. Clue 3. My number is a factor of 32. Clue 4. The sum of its digits is odd.

    asked on October 4, 2017
  88. Career

    Which CTSO is appropriate for future teachers? A. FEA***** B. FFA C. FTA D. DECA

    asked on March 18, 2020
  89. calculus

    An airplane flies at an altitude of 5mies toward a point directly over an observer. The speed of the plain is 600 miles per hour. Find the rate at which the angle of elevation thetha is changing when the angle is 75 degrees. Please help with this question.

    asked on January 19, 2012
  90. math

    An antique clock takes 5.5 seconds to chime at 3 o'clock. How long does it take to chime at 9 o'clock ? 5.5/2= 2.75x8=22seconds

    asked on March 4, 2015
  91. Math

    Ronald need to earn at least Php 2,500 from his two jobs to cover his weekly expenses.This week,he can work for at most 42 hours.His job as a gas station attendant pays Php 52.50 per hour while his job as parking attendant pays Php 40 per hour. A. Write a

    asked on September 13, 2017
  92. Trigonometry

    At a point on the ground 125 ft from the base of a tower, the angle of elevation to the top of the tower has a degree measure of 38 degrees. How high is the tower

    asked on April 23, 2016
  93. math

    There are some caps in a box. 1/6 of them are red, 1/3 of them are blue and 3/7 of the remainder are green. If there are 27 green caps, how many caps are there altogether? How should I solve this?

    asked on December 3, 2015
  94. physics

    The amount of energy dissipated by a 100-W bulb in a common parallel circuit ____________________. a. All of these. b. None of these. c. is normally 100 joules per second. depends on the voltage supplied to the lamp. d. depends on how long the bulb is lit.

    asked on July 20, 2008
  95. Chemistry

    After you preform your experiment, you determine that the Kf value for naphthalene is 6.89 °C/m . You are using 10g of naphthalene and added 1.0 g of your unknown. The the freezing point of the solvent decreased by 4.42 °C when the unknown was added.

    asked on September 11, 2016
  96. Calculus Antiderivative Problem

    A car traveling at 46 mph decelerates at 21 feet per second per second. a). How long does it take for the car to come to a complete stop? b). What distance is required to bring the car to a complete stop? An

    asked on November 8, 2013
  97. Statistics

    You look at the relationship between how much time people spend on the website ‘Bookface’ and how productive they are at work. time spent on Bookface is the predictor variable, and time spent working is the response variable. correlation between

    asked on March 22, 2017
  98. Math

    On an average day, 38 customers buy a bag of grapes at Jerry's Market. There are an average of 47 grapes in each bag. Round to the nearest ten and then multiply to estimate the number of grapes Jerry's customers buy every day.

    asked on November 6, 2015
  99. Chemistry

    Consider the following reaction: 4NH3(g) +5O2(g) -->4NO(g) +6H2O(g) Suppose we have two flasks connected by a stopcock. In one flask, we have 2.0L of NH3(g) at a pressure of .500 atm. In the other flask, we have 1.00L of O2(g) at a pressure of 1.5atm. When

    asked on October 29, 2014
  100. Physics

    A car goes around a curve on a road that is banked at an angle of 33.5 degrees. Even though the road is slick, the car will stay on the road without any friction between its tires and the road when its speed is 22.7 m/s. What is the radius of the curve?

    asked on September 19, 2012


  1. 1
  2. 2
  3. 3
  4. 4
  5. 5