Popular questions and responses by Matt
  1. chemistry

    The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is:

    asked on June 22, 2009
  2. Chem

    Order the elements S, Cl, and F in terms of increasing atomic radii. I thought the answer was F, S, Cl, but the answer key said it was S, F, CL Why? AR decreases from left to right. Sulfur has one more energy level, so shouldn't its atomic radii be greater

    asked on June 6, 2008
  3. Math (Probability)

    Suppose that 4 cards are drawn from a well-shuffled deck of 52 cards. What is the probability that all 4 are hearts? There are 13 hearts of 52 cards. So, where do I go from here to solve the equation?

    asked on April 22, 2017
  4. math

    The windows of a downtown office building are arranged so that each floor has six fewer windows than the floor below it. If the ground floor has 52 windows, how many total windows are on the first eight floors?

    asked on April 2, 2011
  5. Finance

    Nico Trading corporation is considering issuing long-term debt. The debt would have a 30 year maturity an a 10 percent coupon rate. In order to sell the issue, the bonds must be underpriced at a discount of 5 percent of face value. In addition, the firm

    asked on October 19, 2011
  6. history

    How did the humanism of the Renaissance compare with traditional Church teachings? A Both humanism and the Catholic Church taught that people are born sinful and in need of salvation. B Humanism’s focus on individual free thinking clashed with the

    asked on November 13, 2019
  7. Business Finance

    Jungle, Inc., has a target debt−equity ratio of 0.72. Its WACC is 11 percent, and the tax rate is 31 percent. (Do not include the percent signs (%). Round your answers to 2 decimal places. (e.g., 32.16)) Required: (a) If Jungle's cost of equity is 14

    asked on October 31, 2010
  8. Chemistry

    A sample of sodium-24 with an activity of 12 mCi is used to study the rate of blow flow in the circulatory system. If sodium -24 has a half-life of 15 hours, what is the activity of the sodium after 2.5 d ?

    asked on July 20, 2010
  9. Chemistry

    A sample of C3H8O that contains 200. molecules contains ________ carbon atoms.

    asked on November 13, 2011
  10. calculus

    Let f be a differentiable function such that f(3) = 2 and f'(3) = 5. If the tangent line to the graph of f at x = 3 is used to find an approximation to a zero of f, that approximation is? So confused

    asked on April 21, 2011
  11. Statistics

    A sign on the gas pump of a certain chain of gasoline stations encourages customers to have their oil checked, claiming that one out of every four cars should have its oil topped up. What is the probability that exactly 3 of the next 10 cars entering a

    asked on February 10, 2007
  12. Math

    There are 72 boys and 90 girls on a math team. For the next competition, Mr Johnson would like to arrange all the students in equal rows with only girls and only boys in each row. What is the greatest number of students that can be in each row? Answer: 72

    asked on September 9, 2016
  13. College alerbra

    Scott invested a total of $9500 at two separate banks. One bank pays simple interest of 11% per year while the other pays simple interest at a rate of 9% per year. If Scott earned $973.00 in interest during a single year, how much did he deposit in each

    asked on November 23, 2013
  14. physics

    Vector V1 is 6.4 units long and points along the negative x axis. Vector V2 is 8.9 units long and points at 60 degrees to the positive x axis 1) find x and y components of v1 and v2? 2) find magnitude of the sum v1+v2? 3) find the angle of the sum v1+v2? I

    asked on January 20, 2010
  15. Algebra

    which equation represents the relationship shown in the table below? x | 0 | 1 | 2 | 3 | __________________ y | -3 | -1 | 1 | 3 | a.) y = -x - 3 b.) y = x - 3 c.) y = 2x - 3 d.) y = -2x + 3

    asked on November 15, 2016
  16. Physics

    A 4 kg mass and a 9 kg mass are being held at rest against a compressed spring on a frictionless surface. When the masses are released, the 4 kg mass moves to the east with a speed of 2m/s. What is the velocity of the 9 kg after the are released?

    asked on November 9, 2014
  17. Math

    The measurement of the radius of a circle is 16 inches, with a possible error of .25 inches. Use differentials to approximate the possible propagate error in computing the area of the circle.

    asked on November 18, 2016
  18. Math (check answers)

    which three-dimensional figure has all triangular faces? A. triangular prism B. triangular pyramid***i pick B.*** C. rectangular pyramid D. cone

    asked on March 20, 2014
  19. math

    find the area of the shaded region in the figure assuming the quadrilateral inside the circle is a square. x^2+y^2=36 (the picture is of a square inside a circle on a coordinate plane)

    asked on February 23, 2013
  20. Chemistry

    A mixture of C3H8 and C2H2 has a mass of 2.3g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. What is the mass of C2H2 in the original mixture?

    asked on October 19, 2013
  21. Chemistry

    The Henry's law constant for CO2(g) in water at 25 °C is 29.4 bar·M–1. Estimate the concentration of dissolved CO2(g) in a carbonated soft drink pressurized with 1.95 bar of CO2(g).

    asked on July 5, 2013
  22. math?

    how do i figuire this problem out? .. A deep-sea diver must descend and ascend in short steps to equalize pressure on his body. If the diver rises toward the surface too fast, he may suffer from a physical condition called “the bends.” Suppose the

    asked on May 5, 2014
  23. Math

    Penn writes a 2013-term arithmetic sequence of positive integers, and Teller writes a different 2013-term arithmetic sequence of integers. Teller's first term is the negative of Penn's first term. Each then finds the sum of terms in his sequence. If their

    asked on December 15, 2014
  24. science(check answers)

    please check my answers 1. B 2. A 3. D 4. A 1.B 2.A 3.D 4.A 1.All renewable resources are inexhaustible A.true B.false 2.Some fuels,called biofuels,are made from plants.They are used in cars and other machines biofuels would fit best in which of the

    asked on March 11, 2014
  25. science(check answers)

    1. A 2. C 3. A 4. D 1. Coal, oil, and natural gas are inexpensive sources of fuel which do not cause pollution when used. A. true B. false 2. One reason people around the world use coal as an energy source is: A. It is nonrenewable. B. it can be found many

    asked on March 11, 2014
  26. history

    What are scientific innovations of the Renaissance? Select all that apply. A sun dial B mechanical clock C spinning jenny D microscope i think it is A and D

    asked on November 13, 2019
  27. math

    Assume an 18 month CD purchased for $7000 pays an APR of 7% compounded monthly. What is the APY? APY = ___% Round the answer to two decimal places

    asked on January 16, 2016
  28. math

    The length of a rectangular landing strip exceeds its width by 3,700 feet. If its perimeter is 17,400 feet, what is the length, in feet, of the airfield? A. 2500 B. 5000 C. 6200 D. 10000 E. 13700

    asked on August 14, 2014
  29. geometry

    what would be the next sequence in george, thomas, abe, alexander,...and why

    asked on August 17, 2009
  30. english

    please help me!!!! Put the sizes on the uniforms while sorting them out. and the italicized is sorting them out,can only be: adverb clause infinitive phrase past participial phrase elliptical clause adjective clause

    asked on May 8, 2012
  31. computer science

    I need help with my Java homework! Write a program that calculates a customer's monthly bill. It should ask the user to enter the letter of the package the customer has purchased (A, B, or C) and the number of hours that were used. It should then display

    asked on February 15, 2010
  32. Sociology Multiple choice

    Which of the following is(are) true of culture? a. culture would be significant whether people held it in common or not b. despite the cultural diversity that exists in American society, there are symbols, language patterns, belief systems, and ways of

    asked on June 12, 2008
  33. Math

    Mary can clean a house in two hours, Gina can clean a house in three hours. How long would it take for Mary and Gina to clean the house together.

    asked on September 1, 2016
  34. Math

    Penn writes a 2013-term arithmetic sequence of positive integers, and Teller writes a different 2013-term arithmetic sequence of integers. Teller's first term is the negative of Penn's first term. Each then finds the sum of terms in his sequence. If their

    asked on December 14, 2014
  35. Physics electric force, please help!

    A charge of +Q and a charge of +2Q are separated by a distance r. The electric force of +2Q on +Q has a magnitude of F and is directed to the right. Which one of the following statements is correct regarding the electric force of +Q on +2Q? (A)The electric

    asked on November 8, 2012
  36. eco

    Suppose a person pays $80 of annual interest on a loan that has a 5 percent annual interest rate. The loan amount is: A. $400. B. $1,600. C. $160. D. $85. 10. Suppose a loan customer is considering two alternative $22,000 loans. Loan 1 requires payment of

    asked on May 26, 2011
  37. chemistry

    A 0.1943g iron ore sample was dissolved in hydrochloric acid and the iron was obtained as Fe 2+ (aq). The iron solution was titrated with Ce 4+ solution according to the balanced chemical reaction shown below.After calculation, it was found that 0.0237 g

    asked on October 17, 2010
  38. college physics

    Three identical balls are thrown from the top of a building, all with the same initial speed. The first is thrown horizontally, the second at some angle above the horizontal, and the third at some angle below the horizontal. Neglecting air resistance, rank

    asked on October 5, 2010
  39. Chemistry

    Pure acetic acid, known as glacial acetic acid, is a liquid with a density of 1.049 g/mL at 25°C. Calculate the molarity of a solution of acetic acid made by dissolving 35.00 mL of glacial acetic acid at 25°C in enough water to make 400.0 mL of solution.

    asked on May 16, 2016
  40. Math (check answer)

    1.never the difference of two positive integers is _____ negative. A.always B.sometimes C.never

    asked on April 2, 2014
  41. Physics

    An automobile tire has a volume of 0.0185 m3. If the pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire?

    asked on December 5, 2010
  42. calculus

    Suppose the following about a certain object: I. The object's altitude is a function of time, represented by the function A(x) where here x is time. II. The temperature of the object is a function of its velocity, represented by the function T(x), where

    asked on November 26, 2008
  43. Physics

    A hollow metal sphere has inner and outer radii of 20.0 cm and 30.0 cm, respectively. As shown in the figure, a solid metal sphere of radius 10.0 cm is located at the center of the hollow sphere. The electric field at a point P, a distance of 15.0 cm from

    asked on January 29, 2015
  44. Algebra

    Suppose that |a-b|+|b-c|+|c-a|=20. What is the maximum possible value of |a-b|?

    asked on December 13, 2014
  45. Math

    Nathan is designing a box to keep his pet newt in. To make the box, he’s going to start with a solid rectangle and cut squares with sides x cm in length from each corner, as shown in the picture below. The dimensions of the of the solid rectangle are 51

    asked on October 30, 2014
  46. science(check answers)

    can someone check my answer thanks ! 2.The ability to do work or cause change is called A.velocity. PICK B.) C.transfer. D.friction. 3.Which type of energy is demonstrated by a person jogging? A.electrical energy B.nuclear energy

    asked on March 5, 2014
  47. Math

    In a certain lottery, five different numbers between 1 and 30 inclusive are drawn. These are the winning numbers. To win the lottery, a person must select the correct 5 numbers in the same order in which they were drawn. What is the probability of winning?

    asked on October 11, 2009
  48. Math

    Find the exact value of cos(u + v) ) given that sin u= 9/41 cos nu=- 15/17 . (Both u and v are in Quadrant II.)

    asked on April 28, 2020
  49. calculus

    Find the general solution of this de (1+cosx)y'=sinx(sinx+sinxcosx-y) I need full step have tried but nothing good is coming out

    asked on April 25, 2019
  50. Algebra

    A number n is less than 6 units from 0. write inequality and solve it.

    asked on September 22, 2016
  51. Science

    The Strange Case of Beriberi In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi. Symptoms of the disease included weakness and loss of appetite, victims often died of heart failure. Scientists thought the

    asked on September 10, 2016
  52. math

    Assume an 18-month CD purchased for $7000 pays an APR of 3% compounded monthly. What is the APY?

    asked on January 15, 2016
  53. Spanish

    1 of 15 I tried to get there on time, but there was an accident on the freeway: Yo ____(1)____ llegar a tiempo, pero ____(2)____ un accidente en la autopista. Options 1-quise or queria 2-hubo or habia Answers 1- quise 2 -habia 2 of 15 They refused to admit

    asked on September 19, 2015
  54. Math

    Let a1,a2,......a10 be an arithmetic sequence. If a1+a3+a5+a7+a9=17 and a2+a4+a6+a8+a10=15 then find a1.

    asked on December 15, 2014
  55. math

    1.Which of the following numbers are equivalent to 20%? CHOOSE ALL THAT APPLY.!! A. 0.002 B. 1/4 C. 0.20(I PICK THIS) D. 1/5(I PICK THIS) 2.which of the following numbers are equivalent to 35%?CHOOSE ALL THAT APPLY !! A. 7/20 B. 6/20 C. 3.5 D. 0.35 (I KNOW

    asked on February 1, 2014
  56. Physics

    A small, nonconducting ball of mass m=1.0mg and charge q=2.0*10^-8 C (distributed uniformly through it's volume) hangs from an insulated thread that makes an angle theta = 30 degrees with the vertical, uniformly charged nonconducting sheet. considering the

    asked on March 15, 2010
  57. Math

    A quadrilateral is a ____ if and only if one pair of opposite sides are parallel and the other pair of opposite sides are congruent. Choices: Kite, Parallelogram, Rhombus, Square, or rectangle

    asked on October 12, 2009
  58. Statistics

    The prize for winning a contest can be chosen from category A or category B. Prizes from category A have a mean of $1000 and a standard deviation of $50. Prizes from category B have a mean of $1000 and a standard deviation of $300. Describe an advantage of

    asked on October 19, 2018
  59. science(check answers)

    1.D 2.A 3.A not sure please help 5.false One light bulb in a string of lights goes out. This causes all of the other lights in the string to also go out. This is an example of a A. resistor. B. parallel circuit. C. closed circuit. D. series circuit.

    asked on March 31, 2014
  60. Statistics

    A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term average daily sales were $24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of x(bar)=$25,910 with sample

    asked on May 9, 2012
  61. Mathematics!

    A cereal factory has weekly fixed costs of $48,000. It costs $1.37 to produce each box of cereal. A box of cereal sells for $3.99. Express the profit function p(x) that gives the total weekly profit from x boxes of cereal.

    asked on October 20, 2011
  62. Math

    A box has a bottom with one edge 7 times as long as the other. If the box has no top and the volume is fixed at V, what dimensions minimize the surface area?

    asked on March 11, 2010
  63. accounting

    Mr. Jones intends to retire in 20 years at the age of 65. As yet he has not provided for retirement income, and he wants to set up a periodic savings plan to do this. If he makes equal annual payments into a savings account that pays 4 percent interest per

    asked on June 10, 2009
  64. Chemistry

    Hey, can you help me balance this equation? Cu2S + HNO3 --> Cu(NO3)2 + CuSO4 + NO2 +H2O Thanks!

    asked on January 24, 2008
  65. ACC

    someone help me with this questions please 1. How would the following costs be classified (product or period) under variable costing at a retail clothing store? Cost of purchasing clothing Sales commissions A) Product Product B) Product Period C) Period

    asked on November 16, 2007
  66. geometry

    A rectangle with a width of 9 ft. and a length of 13 ft. is the base of a 30 ft. tall pyramid. What is the volume of the pyramid? 117 cubic feet 1,170 cubic feet 390 cubic feet 3,510 cubic feet

    asked on March 31, 2020
  67. English

    Book: Nickel and Dimed Ehrenreich is somewhat surprised that low-wage workers in Minnesota aren’t treated better than low-wage workers in other states because A. Minnesota has a low unemployment rate B. it is a relatively liberal state and tries more

    asked on January 17, 2019
  68. Math

    . Alex plays rugby and can burn approximately 650 calories in a 1.25-hour game. Danielle enjoys kickboxing and can burn approximately 420 calories in a 45-minute class. Who burns calories at a higher rate?

    asked on September 15, 2018
  69. math

    how many students are in the sample 15 20 22 25

    asked on May 15, 2018
  70. Calculus application of sin function

    a horizontal position of the pendulum of a grandfather clock can be modelled by h(t)=Acos(2(pi)t/T), where A is amplitude of the pendulum in meters, t is time in seconds, and T is the period of the pendulum, in seconds. If the pendulum has a velocity of

    asked on November 25, 2016
  71. Math

    On a trip of d miles to another city, a truck driver's average speed was x miles per hour. On the return trip the average speed was y miles per hour. The average speed for the round trip was 50 miles per hour. Show that y=25x/(x-25) Find the limit of y as

    asked on November 18, 2016
  72. Math

    Three pictures hang side by side on a wall. What is the total area of the wall that the pictures cover? Length is 10 1/2 inches, 10 1/2 inches, 10 1/2 inches Width 14 2/3 inches Would I need to add 10 1/2 plus 10 1/2 plus 10 1/2 and then multiply by 14 2/3

    asked on September 8, 2016
  73. Physics

    A DIVERGING lens has a focal length of 35 cm. (a) Find the image distance when an object is placed 48 cm from the lens. (b) Is the image real or virtual magnified or reduced? I am very lost and don't even know where to start

    asked on May 22, 2016
  74. Math

    Could someone check my work? A 200-foot cliff drops vertically into the ocean. The angle of elevation from a ship to the top of the cliff is 22.3 degrees. How far offshore, to the nearest foot, is the ship? Tan(22.3) = 200ft/x xtan(22.3)=200ft

    asked on March 21, 2016
  75. Spanish

    Esta mañana nos (1) _____ temprano en carro sin mapa. Al (2) _____ de la ciudad, Jorge (3) _____ al empleado de una gasolinera dónde (4) _____ el carril para acceder a la autopista. El empleado no (5) _____ contestarle porque no (6) _____ a dónde (7)

    asked on September 25, 2015

    EL PRETÉRITO. Modifique el párrafo por cambiar los verbos italizados al pretérito. Ejemplo: Tenemos que preguntarle al revisor. Tuvimos que preguntarle al revisor. Voy___(1)___ a coger el tren para irme de vacaciones a la sierra. Ya no me queda___(2)___

    asked on September 10, 2015
  77. Business Law

    Two brothers, Sam and Jim, were fighting over the division of their ancestral property. After ten years of legal battle, a frustrated Sam contacted a powerful politician who subjected Jim to extreme duress in order to make him sign a contract of assent in

    asked on November 15, 2014
  78. math

    A square has the same area as a rectangle whose longer side is 2 times the length of its shorter side. If the perimeter of the rectangle is 24, what is the perimeter of the square? I have no idea how to do it. I need help.

    asked on August 14, 2014
  79. math

    1.which of the following represents a unit rate? A.$4/12 B.5/2 C.80/1(I PICK THIS) D.72/2

    asked on January 21, 2014
  80. math(adding mixed fractions)

    please help me with (addition mixed fractions)i cant get it!!! ---addition with mixed numbers--- 1.which of the following is not true for adding mixed numbers? A.the denominators of the fractions must be the same in order to add them. can add mixed

    asked on December 1, 2013
  81. Chemistry

    If the absolute temperature of a gas is doubled, what happens to the root-mean-square speed of the molecules?

    asked on June 21, 2013
  82. Programming and Design

    Draw the hierarchy chart and design the logic for a program that calculates the projected cost of an automobile trip. Assume that the user's car travels 20 miles per gallon of gas. Design a program that prompts the user for a number of miles driven and a

    asked on April 3, 2013
  83. english

    Can someone please help, I'm supose to write explaining what advice one would give George and Lydia Hadley on how to be become better parents. I don't understand this passage so I don't know what to write. "I don’t know anything," he said, "except that

    asked on February 13, 2013
  84. english

    Scientists report (1) that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live, in the deep sea. Creatures in the seabed are suffering from growing food shortages. Which may be a result of rising sea

    asked on February 6, 2013
  85. math

    what problem did the dumb gangster have when the boss told him to blow up a car?

    asked on March 28, 2012
  86. 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

    asked on July 7, 2011
  87. algebra

    what did the beaver say to the tree? using only these letters egatkwolifunydcsmb. you may use these letters more than once

    asked on December 14, 2010
  88. 11th grade

    What are the formal and functional regions of seattle washington???

    asked on March 16, 2009
  89. ACC

    A reason why absorption costing income statements are sometimes difficult for the manager to interpret is that: A)they omit variable expenses entirely in computing net operating income. B)they shift portions of fixed manufacturing overhead from period to

    asked on November 16, 2007
  90. English

    Marco is overwhelmed by the rude customers, but he never loses his A. aplomb

    asked on January 17, 2019
  91. math

    U2 is an Irish band that has been popular for over three decades. The lengths of 80 of their songs were selected at random and are listed in the table below. Lengths of Randomly Selected U2 Songs. ? (seconds) 382 222 214 338 310 559 334 225 177 189 278 300

    asked on October 17, 2018
  92. Math logic and reasoning

    1. Tyson was working with square numbers. He noticed a pattern for squaring consecutive numbers that end in 5 note:top column has 5^2,15^2,25^2,35^2 note: Bottom column shows answers of top column so 5^2=25,15^2=225,25^2=625, 35^2=1225 A.) Identify a

    asked on September 12, 2018
  93. Math

    Question: 168.72/0.024=7.03 When I do this calculation on paper the above answer is what I get but when I do this calculation on a calculator I get 7,030.00 what I am doing wrong?

    asked on September 10, 2016
  94. Physics. Help Please

    Gabriele enters an east-w straight bike path at the 3.0-km mark and rides w at a constant speed of 8.0 m/s. At the same time, Xena rides east from the1.0-km mark at a constant speed of 6.0 m/s. 1. Write function x(t) that describe the position of Gabriele

    asked on September 11, 2015
  95. Math (PreCalculus)

    The second hand of a clock is 4 inches long. Describe the height of the tip of the second hand from the bottom of a clock. (The radius of the clock is 1 inch more than the length of the second hand.)

    asked on December 24, 2014
  96. math question

    /how do i solve this? The probability of winning a game is 15%. If you play 20 times,how many times should you expect to win? A.5 times B.3 times C.6 times D.15 times

    asked on June 5, 2014
  97. new social studies

    1.C 2.A 3.B 4.C 1.Which of the following most contributes to deforestation of the amazon rain forest? A. mining B. lumber miliing C. road construction D. tourism 2.Which of the following is an immediate negative effect of deforestation of the amazon rain

    asked on April 7, 2014
  98. social studies check answers

    1.D 2.A 4.C 1.“Along the southern coast of Brazil the central plateau descends in high, steep escarpments. It towers over the waves and moves back in ridges, leveling off from the peaks of the coastal ranges … As it continues along to the northern

    asked on April 5, 2014
  99. algebra

    A certain car's cooling system has an 8-qt capacity and is filled with a mixture that is 30% alcohol. How much of this mixture must be drained off and replaced with pure alcohol if the solution is to be 50% alcohol?

    asked on March 30, 2014
  100. math(check answers)

    please check my math!! THANKS SO MUCH 1. Identify the decimal And simplified fractional form of 80%. A. 0.8 and 3/5 B. 0.8 and 4/5(I PICK THIS) C. 0.08 and 3/5 D. 0.08 and 4/5 2.A baseball team wins 45% of its games. What fraction of games does it win? A.

    asked on February 4, 2014


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