1. Physicis

    How much energy is needed to heat and melt 3.0 kg of copper initially at 83°C? Be mindful of significant figure rules for both multiplication and addition

    asked by Kathryn on December 10, 2012
  2. math

    im doing corespondence and i tried for days to figure this out and i cant can anyone help?? Determine the amount of each investment? $400 at 9% compounded semi-annually for 2 years i just need that answer and how too get it then i can do them thank you

    asked by kristen on July 31, 2010
  3. Chemistry

    How do you convert -2.1786*10^-18 J to kj/mole and this is the energy released when an electron is added to hydrogen nucleus. I been trying to figure this out for 30 mins and I still didn't get it please help

    asked by Anonymous on November 29, 2012
  4. Mathematics

    what geometric figure/shape can we find in enchanted kingdom, rizal shrine in laguna, and in gardenia factory?????? i really need it plz help me T.T

    asked by Elaine on February 22, 2013
  5. Math

    Describe a real world situation that could be represented by planes slicing a three dimensional figure to form cross sections

    asked by Bob on March 5, 2017
  6. world history

    Select the Japanese figure of the feudal warrior society whose role was similar to that of the knight in Medieval Europe. I say emperor

    asked by tracy on January 24, 2012
  7. Algebra

    I am trying to figure out the zeroes of 2x^2-7x-30. I did this graphically in a way that matched up with the answers in my book, however, I couldn't get it by distributing. I tried (2x+-10)(x+3) but that didn't get -7x in the middle as logic told me it

    asked by Anneliese on November 3, 2009
  8. Language arts

    In Richard Brautigan's poem "All Watched Over by Machines of Loving Grace", what kind of figures of speech does he use? I know one of them is sarcasm, but I can't figure out if there are any more...

    asked by Anonymous on January 25, 2012
  9. geometry

    find the area of the trapezoid whose diagonals are 30 each and height of 18? I spent 2 hrs and I can't figure it out Pls. help 408-887-2612

    asked by peter on April 16, 2010
  10. Physics

    Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?

    asked by Donald on November 8, 2012
  11. Composition and Communications

    I am trying to figure out how to start this paragraph...The question is Explain how purpose, audience, tone, and content impacts academic writing

    asked by hazzey on August 6, 2011
  12. Calculus

    Find f(x) so that it satisfies: f'(x)=1+e^x+1/x and f(1)=3+e. Another tutor was kind enough to give me the anti deriv as x+e^x+ln x+c and that the constant is 2. But I can't figure how to prove it or where to start so I will know for the test. Thanks.

    asked by Rene on April 16, 2013
  13. Biology

    what molecule is released before acetyl coa enters the krebs cycle Doing cross word puzzle 13 spaces cant figure it out?

    asked by bob on February 14, 2013
  14. Math

    The first question is show how to make one addend the next tens numbers. Complete the new addition sentence: 15 + 37= I need a break down to how to to figure this out. Please.. I have no clue what to do.

    asked by Paula on October 24, 2016
  15. Chemistry

    I am doing a report on ethylene glycol, AKA antifreeze, and I need to figure out if it is naturally occurring or if it is man-made. I can't seem to find this answer anywhere! Please help!

    asked by Julie on December 4, 2010
  16. math

    how do you figure out the length, width and height of a box with a volume of 570 cm3 and a surface area of 478 cm2.

    asked by Paige on May 15, 2011
  17. physic

    Find the acceleration reached by each of the two objects shown in figure below if the coefficient of kinetic friction between the 7.00 kg object and the plane is 0.270.

    asked by Chan on October 16, 2009
  18. chemistry

    2C2H6 + 7O2 --> 4CO2 + 6H20 given 7.5 X 10 to the 3rd of C2H6 how many grams of CO2 is emitted the 7.5 x 10 to the third is 7500 what do i do to figure out the rest

    asked by crystal on December 3, 2016
  19. Physics

    Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?

    asked by Anonymous on November 7, 2012
  20. math

    The formula for the area A of the triangle is A=1/2BH, where B is the length of the base, and H is the height. Solve the equation for B. I don't know how I'm supposed to be able to figure this out?

    asked by lily on October 16, 2009
  21. Communication Language Studies

    I need to figure out the original words/phrases from the following malapropisms: Any ideas? Thanks! For all intensive purposes A blessing in the skies Spitting image

    asked by Audrey on February 20, 2010
  22. English

    Do I need a comma in this sentence or can it be improved on? This dream signifies Gabriel’s hope for Roy to follow in his footsteps and become a religious figure like him.

    asked by joe on December 15, 2011
  23. Segments in a Circle

    If PT = 5.3, TU = 3.8, and UV = 6.4. Solve for the measure of VS and round to the nearest hundredth. What is PT, TU etc Are they length of line segments? What kind of geometrical shape do you have? I can't figure out what you are asking.

    asked by mike on May 8, 2007
  24. Chemistry(Please help)

    I am trying to figure out what functional group the compound CH2ClCH3 is in. I know that it is not a ketone, alcohol, ester, ether, amine, amide, ect..I do not know what it could be.

    asked by hannah on October 4, 2012
  25. math grade 11

    Determine the value of k for which the function f(x)= 4x^2- 3x+2kx+1 has two zeros. check these values in the original equation? i cant figure out the answer to it. It says in the book that it is k 3.5,but i don't know how they got it.

    asked by priya on November 3, 2010
  26. Sociology

    A rational-legal authority figure would most likely be someone like a A. war chief B. principle of a school C. religious leader D. parent My guess is A

    asked by M on December 6, 2017
  27. physics

    Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 416 N and F2 = 363 N. (Assume up and to the right as positive directions.)

    asked by Anonymous on February 24, 2012
  28. chemistry

    I need help getting this started. I made it through organic and this one stumps me, go figure :) How many grams fo NaCl are needed to make 100mL of a 0.10M solution?

    asked by AMY on January 16, 2008
  29. Chemistry

    I am trying to figure out what functional group the compound CH2ClCH3 is in. I know that it is not a ketone, alcohol, ester, ether, amine, amide, ect..

    asked by hannah on October 4, 2012
  30. physics

    Mass mA rests on a smooth horizontal surface, mB hangs vertically.If m_{\rm{A}}=13.0 kg and m_{\rm{B}}=3.0 kg in the figure , determine the magnitude of the acceleration of each block.

    asked by Anonymous on October 23, 2010
  31. math repost with correct info

    A loan requires A 12% down payment and 24 equal monthly payments of $195.00 the amount that needs to be borrowed is $4,200 please explian how to figure this out thanks :)

    asked by Anonymous on November 13, 2007
  32. British Literature

    I did read the sparknotes info but all I could come up with was Roman Catholics, sin, Satan. I can't figure out a way to really make this connect to the story. Any help would be appreciated.

    asked by Anna on January 19, 2011
  33. Chemistry

    For the lab we just did in class, one of the questions wants to know what the molarity of the NaOH is for each of the 'trials' of titration we did. The only problem with this is that the only number given to me was that of the amount we used! (11.29 mL for

    asked by Alexa on May 12, 2010
  34. math

    Calculate the area of each composite figure.round to the nearest square unit, if necessary. a)15mm, 8mm, 10mm 30mm

    asked by dylan on January 26, 2010
  35. PLEASE HELP, MATH

    Determine algebraically if f(x) =(7x-2) / (4). And g(x) = (4x+2) / (7) are inverse functions. Show how you know, I do not understand this type of problem i have a test on these tmrw and need some help with how to figure these out pls help.

    asked by Anyki. on December 14, 2017
  36. Math

    I tried using my calculator and punching in the choices to figure out what x is and none of them equaled -10 so idk what i did wrong Find the value of x that will make the following numerical expression equal to − 10 . -5^2+(x+2)/-4-(-6) (a)−1 (b)−3

    asked by John on February 4, 2012
  37. chemistry

    Just need help solving this one, please: The grams of fat in one avocado if it has 405 Calories, 13 g of carbohydrate, and 5 g of protein Express your answer using one significant figure. Thanks -MC

    asked by mysterychicken on February 1, 2014
  38. art 101

    A shape placed in two-dimensional surface establishes a a. sense of realism b. figure ground relationship c. color d. linear perspective

    asked by rmz on April 12, 2010
  39. math

    y= a*tan pi/p (x-c)+d what letters represent the following domain: range: asymtotes: period: p phase shift: c vertical: d I can't figure out the rest

    asked by Sh on January 20, 2009
  40. Math

    So, I have a question on a project that asks why you get a different answer when measuring the side of a hypotenuse versus using the Pythagorean Theorem. I did get different answers, but I just can't figure out why.

    asked by CC on November 17, 2016
  41. Calculus

    I posted this several days ago but it hasn't been answered and I still can't figure it out: For which values of r does the function defined by y=e^(rt) satisfy the differential equation y''+ y'-6y = 0

    asked by Matt on January 12, 2008
  42. math

    12. Find the area of the shaded part in the figure. Use 3.14 for piƒnand round your answer to one decimal place. 15ft squared

    asked by ken on December 22, 2008
  43. geometry

    how many segments does a 7 sided figure have joining the midpoints of the sides? can you show a photo of how this looks cuz i don't understand - pls thanks

    asked by marko on April 2, 2012
  44. Pre Calculus

    Why can we use either common or natural logarithms to re-express data that fit a power regression model? Couldn't really figure out what the relationship was.

    asked by Laura on January 22, 2011
  45. Chemistry

    Need help with this problem in order to figure out three others. What volume of 2.25 M HCI in liters is needed to Completely react with 0.500 L of 0.400 M Na2CO3?

    asked by Evette C. on November 30, 2010
  46. Science

    Why might scientists want to figure out a way to promote cell division in mature nerve cells? There was no info about this in my text, which is why I posted this on here. I'll appreciate all the help you could give me, thanks

    asked by Sara on May 3, 2010
  47. physical science

    A 65 kilogram person stands on a diving board 15 meters above the water. figure the GPE. show formula and work

    asked by Alexis on September 18, 2011
  48. physics

    Find the magnitude and direction of the net electrostatic force exerted on the point charge q3 in the figure below, where q = +2.5 μC and d = 28 cm. The picture is of a square. q1=+q, q2=-2q, q3=-3q, q4=-4

    asked by Chloe on July 17, 2011
  49. algebra

    (38) please help me figure this out. The multiple choice answers did not match the answer that I got. Select approx values of x that are solutions to f(x)=0 where f(x)=-7x^2 + 5x + 9 please show me steps

    asked by Alaska Diamond on September 22, 2013
  50. Math

    So I have to draw two rectangles on graph paper that each have to fit in a 15 by 20 block. The first rectangle can be what ever size you want but the second one needs be similar with a 3/5 ratio of the first. I can't figure out what their sizes should be.

    asked by Marie on June 3, 2012
  51. ScIeNcE

    To make my my question simpler, is ATP formed during photosynthesis or cellular respiration? If I can figure out that little fact I'll be able to do the rest of my worksheet...

    asked by ari on February 25, 2007
  52. math unit 7 test

    Can the figure below tesselate a plane? Explain your answer. The shape is an arch (like a rainbow) Thanks! will fail math bc this problem why is this happening

    asked by straight A student on January 12, 2017
  53. physics

    Find the magnitude and direction of the net electrostatic force exerted on the point charge q3 in the figure below, where q = +2.5 μC and d = 28 cm. The picture is of a square. q1=+q, q2=-2q, q3=-3q, q4=-4

    asked by Chloe on July 17, 2011
  54. math

    Which is the best strategy to use to solve this problem? Jarrod wants to make a rectangular garden that has an area of 100 square feet. He wants to put a fence around it, but he wants to use as little fencing material as possible. What are the dimensions

    asked by diego on April 18, 2016
  55. Physics

    The composite bar BCD in the figure is fixed at the wall B (x=0), and has constant cross sectional area A_0. The bar is composed by joining, at section C, two segments (BC and CD) of equal length L. Segment CD is homogeneous, made of copper. Segment BC is

    asked by skrillex on July 17, 2016
  56. 4 Calculus Related-Rates Problems

    1. How fast does the radius of a spherical soap bubble change when you blow air into it at the rate of 15 cubic centimeters per second? Our known rate is dV/dt, the change in volume with respect to time, which is 15 cubic centimeters per second. The rate

    asked by Angela on January 22, 2018
  57. Math

    The path of a softball is given by the equation y=0.08x^2 + x + 4. The coordinates x and y are measured in feet, with x=0 corresponding to the position from which the ball was thrown. A) Use a graphing utility to graph the trajectory of the softball. B)

    asked by Laura on April 23, 2007
  58. physics

    how much heat is needed to raise the temperature of 5kg of silver from 20 degrees C to 96 decgrees C?

    asked by patrick on January 12, 2015
  59. Chemistry

    If you used 2300 kcal you expend in energy in one day to heat 6.0 * 10^4g of water, what would its new temperature be

    asked by Anonymous on October 23, 2012
  60. Chemistry

    What change in temperature is neeeded when 40.0g of water absorbs 2500 calories of heat?

    asked by Mak on April 10, 2014
  61. chemistry

    The reaction SO2 + 1/2O2 -->SO3 has kp equal to 6.55 at 627C. what is the value of kc at this temperature? how do you set this up?

    asked by Anna on April 14, 2010
  62. science

    How is temperature related to the average kinetic energy of molecules that make up a substance?

    asked by erwin on February 7, 2012
  63. Chemistry

    Calculate the amount of heat required to raise the temperature of a 54 g sample of water from 5°C to 20.°C.

    asked by Ben on September 15, 2010
  64. Chemistry (mol)

    How many mol of nitrogen monoxide gas (N2) are in a 1.49 L container at standard temperature and pressure?

    asked by Summer on March 2, 2018
  65. algebra

    write an inequality. graph it. the freezer temperature is to be kept between 15 farenhight and 25 farenheight, inclusive. thanks

    asked by dillon on October 23, 2007
  66. chemistry

    how much heat has been absorbed by 2500g of water when its temperature changes from 23c to 27c PLEASE EXPLAin

    asked by Jim on December 11, 2014
  67. Chem Help Pls!

    How to sketch Maxwell distributions plots for the following? a) O2 and CO2 at the same temperature b) Ar at 270K and 1000K I really need help with this!

    asked by Dia B on September 17, 2012
  68. chemistry

    calculate the amount of heat necessary ti raise the temperature of 8.5kg of water from 12.5 to 84 degrees C

    asked by Quentin on May 4, 2010
  69. Chemistry (CHEM1380)

    Let the temperature T in a body be independent of z so that it is given by a scalar function: T = 9x^2 + 4y^2 . Identify the isotherms T(x,y) = const.

    asked by Zhuoyu Long on January 23, 2015
  70. Mathematics (Vector) (ENGG1410)

    Let the temperature T in a body be independent of z so that it is given by a scalar function: T = 9x^2 + 4y^2 . Identify the isotherms T(x,y) = const.

    asked by Prof. Zhuoyu Long on January 25, 2015
  71. the moon

    what is the relationship between the moon's surface gravity, lack of an atmoshere, and temperature range?

    asked by nicole on October 21, 2008
  72. physics

    What are the factors that affect the quantity of heat needed to raise the temperature of a substance?

    asked by jaquie on February 24, 2012
  73. Geography

    What are the latiudinal positions of the temperature/mid latitude cyclones during january and july?

    asked by Rabelani on January 30, 2015
  74. Physics

    At what temperature is the rms speed of helium molecules half its value at STP (0 C}, 1.0 atm)?

    asked by ana on November 21, 2009
  75. chemistry

    Calculate the final temperature of 215 mL of water initially at 40 ∘C upon absorption of 16 kJ of heat.

    asked by Anonymous on May 19, 2019
  76. chemistry

    why would dipole moment increase with temperature for a planar molecule? even though those are inversely related...

    asked by paul on February 8, 2015
  77. chemistry

    How many joules of heat energy are required to raise the temperature of 20 grams of water by 50°C?

    asked by precious on May 6, 2019
  78. CHM

    Calculate the heat absorbed by 125 g of water (SH = 1.00 cal/g°C) when the temperature rises from 21.0°C to 35.0°C.

    asked by Christy on January 25, 2018
  79. physics

    If I have 1.5 moles of an ideal gas at a pressure of 3 atmospheres and a volume of 7 liters, what is the temperature?

    asked by g on June 18, 2013
  80. Chemistry

    How much heat is needed to increase the temperature of 60 g of H2O from ice at -5C to liquid at 20C?

    asked by Halie on November 19, 2012
  81. Chem

    If you used the 2600 you expend in energy in one day to heat 7.0×104 of water at 20, what would be its new temperature?

    asked by Trac on March 15, 2013
  82. Science

    1.) A 2OL Of gas is found to exert 3.5atm at 25°C what would the pressure be if the temperature is changed to 30°C.

    asked by Janriel on February 27, 2018
  83. chemistry

    state and explain how the concentration of nitrogen gas would be affected by an increase in temperature

    asked by faith on March 13, 2012
  84. Science

    What will happen if I mix Muriatic acid (just a drop) in room temperature water? (about 80 ml of it) Thanks -MC

    asked by mysterychicken on January 31, 2009
  85. Chemistry

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

    asked by Matt on June 21, 2013
  86. history

    Since temperature in humid can be very hot in the summer and very cold in the winter the vegetation in these area is

    asked by lilybelle on January 3, 2015
  87. science

    if .38 kJ of heat is added to 19.6 grams of ice at -12.0 degrees celsius, what will be the final temperature?

    asked by Sydney on January 10, 2015
  88. Chemistry

    To increase the solubility of a gas at constant temperature from 1.20 g/L at 1.4 atm to 2.3 g/L what would the pressure have to be increased to?

    asked by Tiffany on May 1, 2010
  89. chemistry

    At 25C, Kc= 3.7x10^9 for the reaction CO(g) + Cl2(g) equilibrium with COCl2(g) Calculate the Kp at this temperature.

    asked by Wolf on October 9, 2007
  90. Chemistry

    550 mL of Ar at 632mm Hg will occupy what volume at 750mm Hg with the temperature remaining constant?

    asked by Anonymous on November 7, 2012
  91. Physics

    If 9.30 x 10^5 J of energy are transferred to 2.00kg of ice at 0 deg C, what is the final temperature of the system?

    asked by S on November 14, 2012
  92. chem

    im a bit confused on how and why surface tension and viscosity decrease with increasing temperature?

    asked by greeny on July 16, 2012
  93. PHYSICS

    2. How does the speed frequency distribution graph change for a given gas as the temperature is increased

    asked by Anonymous on July 21, 2012
  94. Chem

    the absolute temperature of the gas at which 3.33 10-3 mol occupies 246 mL at 713 torr

    asked by Sarah Pick on May 8, 2014
  95. CHEMISRTY

    Calculate the energy required to raise the temperature of 160.0 g Ag from 273 K to 295 K.

    asked by Tonya on April 21, 2013
  96. chemistry

    What is the temperature in Celcius of 3.33 moles of neon that occupies 13.4 liters under the pressure of 3 atmospheres.

    asked by Tony on November 14, 2018
  97. Chem

    You have a 46.0 G sample of H20 at a temperature of -58.0*C. How many joules of energy are needed to heat the ice to 95.3*C?

    asked by Joel on May 14, 2012
  98. Chemistry

    How many moles of Xe gas are there in a container of Xe with a volume of 1.5L, and a pressure of 1.25 atm, and a temperature of 150C?

    asked by Patrick on May 13, 2012
  99. college Chemisrty

    at what kelvin temperature will 25.2 of xe occupy a volume of 645 L at pressure of 732 torr?

    asked by judy on May 13, 2013
  100. Science

    Would somebody be so kind and help me with my homework,please?Explain, how a substance will dissolve differently if the temperature changes. Thank you for help.Kinga

    asked by Kinga M. on October 16, 2014