Questions Asked on
November 1, 2012

  1. calculus

    If x^2 + y^2 = 100 and dy/dt = 6, find dx/dt when y = 8. (Enter your answers as a comma-separated list.)

    asked by Anonymous
  2. Calculus

    F(x) = x^5 ln x A) Find the interval on which f is increasing Find the interval on which f is decreasing B) Find the local minimum value of f C) find the inflection point (x,y) Find the interval in which f is concave up Find the interval in which f is

    asked by Ray
  3. Physics

    A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the image distance? -21.4 cm 21.4 cm 65 cm 35 cm

    asked by Blegh
  4. AP Psychology

    Chlorpromazine is an antipsychotic drug that reduces paranoia and hallucinations by increasing involuntary muscle movements. reducing involuntary muscle movements. dampening responsiveness to irrelevant stimuli. decreasing the availability of

    asked by Hi
  5. chem

    A very flexible helium-filled balloon is released from the ground into the air at 20degree C The initial volume of the balloon is 5.00L , and the pressure is 760mmHg. . The balloon ascends to an altitude of 20Km , where the pressure is 76.0mmHg and the

    asked by chemdummy
  6. Physics

    A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the magnification of the image? -0.429 -2.33 0.429 2.33

    asked by Blegh
  7. chemistry

    A 15.0ml sample of NaCL solution has a mass of 15.78g.after the NaCL solution is evaporated to dryness, the dry salt residue has a mass of 3.26g. calculate the following concentrations for the %(m/m), % (m/v), molarity (M)

    asked by jack
  8. math

    If the area of a rectangle is 84 square inches.How do i find its length and width? Length is (x+3) width is (x-2).

    asked by Michael
  9. Andrew Carnegie treating his workers??????

    How did Andrew Carnegie treat his workers? He treated them very bad. They were paid little and worked long hours, they were beaten and threatened even though he fought for workers who have bad working conditions he treated his very poorly.

    asked by Laruen
  10. Science

    If 200ml of water were used instead of 100ml,how many grams of the compound would dissolve at 40c

    asked by Luda
  11. Chemistry

    Dry air (0% humidity) is approximately 78% N2, 21% O2, and 1% Ar by moles. Calculate the molar mass and density of dry air at 0 °C and 1.0 atm. Assume ideal behavior and use two significant figures in your answers.

    asked by Garcia
  12. Chemistry(Please, please help)

    I am trying to draw a constitutional isomer for the compound CH3CH=CHCH3 but I am having some trouble. H-C-C=C-C-H I drew the first compound like this with more hydrogens on the Cs. How could I draw another strucutre?

    asked by Hannah
  13. math

    at the grocery store 3/8 of the 408 employees are under the age of 25. How many workers at the grocery store are under the age of 25

    asked by Anonymous
  14. Anatomy & Physiology

    what would happen if there were no negative feedback control on growth hormone and thyroid hormone?

    asked by Liz
  15. Physics

    A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the magnification of the image? -0.429 -2.33 0.429 2.33

    asked by Blegh
  16. Psychology

    Which of the following would best explain a situation in which a small child is afraid of a guinea pig because he had a previously fearful experience with a hamster? Stimulus discrimination Second-order conditioning Stimulus generalization Sensory

    asked by Meep
  17. algebra

    Use the quadratic formula to solve the equation. -4x^2-3x+2=0 Can someone please explain

    asked by Lee
  18. Psychology

    Which statement best illustrates the idea that people adjust their behavior according to the gender schema theory? Choose one answer. a. Agnes tells her son that it is wrong to put makeup on his face and that boys don't wear dresses and skirts. b. Bart

    asked by Jay
  19. math

    The pair of points (6, y) and (10, –1) lie on a line with slope 1/4. What is the value of y? –5 –2 2 5 I think it might be -2?

    asked by Deborah
  20. physics

    The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 3.25 m3. What is the weight of the heaviest bear that the ice can support without sinking completely

    asked by Lucy
  21. maths

    If * stands for -, /stands for +, +stands for *, then which of the following is TRUE? A) 32/14*6+40-8=44.8 B) 14*8/6+40-8=16.8 c) 32*6/14+32-8=9.9 D) 32/6*14+32-8=18.9

    asked by shruthi
  22. AP Chemistry

    A 2.50 L balloon is filled with helium gas at sea level, 1.00 atm and 32 degrees celsius. The balloon is released and it rises to an altitude of 30,000 ft. If the pressure at this altitude is 228 mm Hg and the temperature is -44 degrees celsius, what is

    asked by Katie
  23. Science- Please Help

    Is sledding done better when the air temperate is 25 degrees Fahrenheit or 0 degrees Fahrenheit? Why?

    asked by Christine
  24. Psychology

    Which of these believe that a healthy child will choose what is good for his own growth? Humanistic Social learning theory Psychoanalytic Behavioral Psychodynamic

    asked by Meep
  25. Physics

    A 190-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. What constant force would have to be exerted on the rope to bring the

    asked by Ashley
  26. Psychology

    Jennifer reads books recommended by her history teacher even though there is no grade given for reading them. Which of these applies? Functional fixedness Intrinsic motivation Inductive reasoning Incubation Heuristics

    asked by Jerk
  27. Psychology

    What approach to therapy would be used by a therapist who teaches a deaf child to sign "help" by rewarding him each time he makes the sign? Cognitive Biological Behavioral Psychodynamic Humanistic I'm torn between behavioral and cognitive.

    asked by Jerk
  28. Psychology

    To establish a cause and effect relationship, which should be used? Naturalistic observation An experiment A survey A test A case study Wouldn't you need to conduct an experiment..?

    asked by yal
  29. reading

    the evening melted away like a snowflake.the answer is what simile oe personification

    asked by charly pierre
  30. Calculus

    Find the volume of the solid obtained by rotating the region enclosed by y=x^3, y=25x, x ≥ 0

    asked by John
  31. psychology

    Hello, can you lead me to how I would search for peer reviewed journal articles on freud psychoanalysis peer reviewed thanks

    asked by darius
  32. Physics

    Tom the cat is chasing Jerry the mouse on a table. Jerry puts on the brakes and stops and Tom continues right off the edge of the table at 4.00 m/s. If it takes Tom 0.50 seconds to hit the ground, then the table is approximately ____ meters high and Tom

    asked by Trish
  33. Chemistry-Explanation Please

    Oxygen gas can be generated by heating KClO3 in the presence of some MnO2. 2KClO3 → 2KCl + 3O2 If all the KClO3 in a mixture containing 1.00 g KClO3 and 0.25 g MnO2 is decomposed, how many liters of O2 gas will be generated at T = 24.0°C and P = 755.6

    asked by Kwame
  34. Physics

    A current of 4 A flows in a copper wire 10 mm in diameter. The density of valence electrons in copper is roughly 9 × 1028 m−3. Find the drift speed of these electrons. Answer in units of m/s.

    asked by Aj
  35. AP Physics B

    A 2189 kg car moving east at 9.73 m/s collides with a 3285 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 35.7◦ north of east and at a speed of 4.79 m/s. What was the speed of the 3285 kg car before

    asked by Daisy
  36. math

    If you are flying to a city 800 miles away, what will be the difference in flight times between flying into a 40-mph headwind and flying with a 40-mph tailwind if the plane's maximum speed with no wind is 160 mph?

    asked by Christina
  37. chem

    A sample containing 6.40 g O2 gas has a volume of 15.0 L. Pressure and temperature remain constant. a. What is the new volume if 0.600 mole O2 gas is added? b. Oxygen is released until the volume is 12.0L. How many moles of O2 are removed? c. What is the

    asked by tracy
  38. algebra

    The time it takes you to get to campus varies inversely as your driving rate. Driving at a rate of 40 miles per hour, it takes 1.5 hours. How long would the trip take you driving at a rate of 60 miles per hour?

    asked by Maria
  39. Math,Physics,Chemistry

    Calculate the gravitational force of attraction between two protons in a chemical compound.Take the mass of proton as 0.0000000000000000000000000000167 kilogramme and the distance between the protons in a chemical compound is 0.000000000010 metre.

    asked by Ibraheem
  40. Statistics

    You have two independent samples of size 24 and 27. You conduct a hypothesis test and obtain a p-value. Using the conservative method what would you use for the degrees of freedom for comparison? 24 27 23 26 49

    asked by Clueless
  41. math

    how many possible combinations are there to make $1.55 using a dollar, dimes and pennies?

    asked by sarah
  42. Psychology

    To measure the relationship between age and cell phone use, a researcher should use a Correlation Central tendency A histogram Standard deviation A t test

    asked by yal
  43. algebra

    A landscaper is designing a flower garden in the shape of a trapezoid. She wants the shorter base to be 3 yards greater than the height and the linger base to be 7 yards greater than the height. She wants the area to be 295 square yards. The situation is

    asked by Lee
  44. physics

    find energy of a single photon of light when you have 5.4*10^12 hertz.

    asked by maria
  45. Physics

    A roller-coaster car speeds down a hill past point A where R1 = 10.4 m and then rolls up a hill past point B where R2 = 15.6 m, as shown below. R1 and 2 are radii (a) The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car

    asked by Angela
  46. Thermal Physics, Kinetic Theory of Gases

    Oxygen (O2) has a molar mass of 32 g/mol. (e) Suppose an oxygen molecule traveling at this speed bounces back and forth between opposite sides of a cubical vessel 0.10 m on a side. Find the average force it exerts on one of the walls of the container.

    asked by Help!!
  47. Chemistry

    Show the steps necessary to transform acid on left to compound on right... Make sure you use SOCl3.................. (CH3)3CCH2C(=O)OH ----------> (CH3)3CCH2C(=O)OCH2CH=CH2 (CH3)3CCH2C(=O)OH-----------> (CH3)3CHC(=O)N(CH2CH3)2

    asked by Arthur
  48. Physics

    A person walks the path shown below. The total trip consists of four straight-line paths. Path 1 is 30.0 m due east. Path 2 is 200.0 m due south. Path 3 is 140.0 m 30.0° south of west. Path 4 is 170.0 m 60.0° north of west. At the end of the walk, what

    asked by Mel
  49. physics

    A curve of radius 20 m is banked so that a 970 kg car traveling at 50 km/h can round it even if the road is so icy that the coefficient of static friction is approximately zero. The acceleration of gravity is 9.81 m/s^2 Find the minimum speed at which a

    asked by JoAnna
  50. chemistry

    In an experiment a student allowed benzene C6H6+ TO REACT WITH EXCESS BROMINE BR2+ In an attempt to prepare bromobenzene C6H5Br. This reaction also produced as a by-product, dibromobenzene, C6H4Br2+ On the basis of the equation. What is the maximum amount

    asked by Dolly
  51. chemistry

    In an experiment a student allowed benzene C6H6+ TO REACT WITH EXCESS BROMINE BR2+ In an attempt to prepare bromobenzene C6H5Br. This reaction also produced as a by-product, dibromobenzene, C6H4Br2+ On the basis of the equation. C6H6 + Br2 -> c6h5Br + H Br

    asked by Dolly
  52. Chemistry for Eng.

    Select the delta H values associated with the dissolution of lithium chloride that are exothermic. delta H1: energy associated with the separation of water molecules delta H2: energy associated with the separation of ions delta H3: energy associated with

    asked by Anonymous
  53. chemistry

    In a reaction between methane, CH4+ and chlorine, Cl2+ four products can form: CH3Cl, CH2Cl2 + CHCl3+ and CCl4. In a particular instance, 20.8 g of CH4 were allowed to react with excess Cl2 and gave 5.0 g CH3Cl, 25.5 g CH2Cl2+ and 59.0 g CHCl3+ all the CH4

    asked by Dolly
  54. Chemistry

    In an experiment a student allowed benzene C6H6, TO REACT WITH EXCESS BROMINE BR2, in an attempt to prepare bromobenzene C6H5Br. This reaction also produced as a by-product, dibromobenzene, C6H4Br2, On the basis of the equation. C6H6 + Br2 -> c6h5Br + H Br

    asked by Sunny
  55. Chemistry with Qualitative Analysis

    Help please with Carbon analysis. An air bubble accidentallyy enter the CO2-collection graduated cylinder after the completion of the reaction. How does this error affect the reported moles of CO2(g) collected--too high, too low, or unaffected? Explain.

    asked by EJ Nunez
  56. Chemistry

    In a reaction between methane, CH4 and chlorine, Cl2 four products can form: CH3Cl, CH2Cl2 + CHCl3 and CCl4. In a particular instance, 20.8 g of CH4 were allowed to react with excess Cl2 and gave 5.0 g CH3Cl, 25.5 g CH2Cl2+ and 59.0 g CHCl3+ all the CH4

    asked by Sunny
  57. Physics

    A 63 Ω resistor is connected to a 4.7 V battery a) When the switch is closed, calculate the current I. Answer in units of A. A 7.4 Ω resistor is connected to a 4.7 V battery When the switch is closed, calculate the current I. A 69 Ω resistor is

    asked by Aj
  58. Algebra

    A clothing company makes two basic products- shirts and pants. The company has 50 labor hours per day in the cutting department and 70 hours available in the sewing department. It takes 12 minutes to cut a shirt and 15 minutes to sew it. It takes 13

    asked by James
  59. us history

    southern members of congress resisted antislavery efforts by

    asked by jdchs
  60. Math

    g=(50-(50/((1/(.0005+(1/10X)))+100-10X))*(100-10X)) Can this be simpler?

    asked by Rian
  61. History---Modern World History

    Write a short paragraph that traces the rise of Japan from an isolated society to a major industrial and imperial power. I'm good at writing paragraphs but I really don't understand the question! If someone could explain to me what my teacher wants and how

    asked by Ariana
  62. Calculus

    f(x)=(1/3)x–4 on the interval [2,9]. The domain of the inverse function is the interval [A,B] where A=? and B=?

    asked by Steven
  63. AP Physics B

    A gadget of mass 17.85 kg floats in space without motion. Because of some internal malfunction, the gadget violently breaks up into 3 fragments flying away from each other. The first fragment has mass m1 = 4.12 kg and speed v1 = 3.57 m/s while the

    asked by Daisy
  64. Pre-Calc

    cosx/(1+secx) Please help me simplify this expression.

    asked by Gaby
  65. math

    how do i find the equivalent decimal for 2 3/4

    asked by sarah
  66. circle

    two parallel chords of length 30 cm and 16 cm are draw on the opposite sides of center of a circle of radius 17 cm find the distance between the chord

    asked by surbhi kumari
  67. Physics

    A car is stopped at a stoplight. When the light turns green, it accelerates with a constant acceleration of 2.5 m/s^2. At the same instant, a truck passes the car in the same direction with a constant velocity of 15 m/s. how long until the car catches the

    asked by Sarah
  68. circle

    two parallel chords of length 30 cm and 16 cm are draw on the opposite sides of center of a circle of radius 17 cm find the distance between the chord answer

    asked by surbhi kumari
  69. physics

    An object with a mass of 5000kg is 6.5m away from an object with the mass of 2000kg. What is the force exerted on the smaller mass by the bigger mass?

    asked by Katelyn
  70. AP Physics B

    A 0.408 kg puck, initially at rest on a horizontal, frictionless surface, is struck by a 0.0886 kg puck moving initially along the x axis with a speed of 3.14 m/s. After the collision, the 0.0886 kg puck has a speed of 2.14 m/s at an angle of 38◦ to the

    asked by Daisy
  71. math

    square root of 3 to the second power minus 5 divided by 8

    asked by jack bakersfeild
  72. Programming-Array

    If i have a string with a word 'today' in it. If a user inputs a char (lets say b). how do I right the array to make it see if the char "b" is in the string today. LOOP??? int i; for(i=0; i

    asked by Greg
  73. physics

    Digital COmmunication describes the development of digital storage in stages and different forms of digital storage.

    asked by Anonymous
  74. English

    ????? Is to rock. Answer needs to have these letters. Clerad

    asked by Lily
  75. physics

    Digital Communication Describes in detail the stages of digital storage of information in different forms with examples such as CDs and DVDs help me please

    asked by Anonymous
  76. thermodynamic

    1.5kg water in a closed system initiallu have a pressure of 700 kPa and x=0.7.Then,water had been expanding at constant temperature process until the pressure decrease to 150kpa.During the process,1000kJ heat was transferred to the system.Determine the

    asked by SYAZWANI URGENT
  77. pre-algebra

    why there's no # 54-72 on pg. 214 on the 7th grade math textbook??? if you can't tel why it's ok and thanks by the way

    asked by peter
  78. Chem Ideal Gas Law

    A 1.05 g sample of an ideal gas occupies 1.045 L at 20.0°C and 0.975 atm. What will be its volume at -8.6°C and 0.5 atm? I used PV=nRT for this. substituted P for 0.5 then n for 1.05, R .0821 then T for 264.4 K After doing this I got .0219 but it is

    asked by Julie
  79. chem

    A very flexible helium-filled balloon is released from the ground into the air at 20degree C The initial volume of the balloon is 5.00L , and the pressure is 760mmHg. . The balloon ascends to an altitude of 20Km , where the pressure is 76.0mmHg and the

    asked by chemdummy
  80. Chem

    A gas mixture in a 3.100 L container at 415°C contains 1.30 g each of Ar, CO, and CH4. Find the partial pressure of Ar (in atmospheres). Find the total pressure of the gas mixture (in atmospheres). Find the mole fraction of CO. Do I use PV=nRT for partial

    asked by Anoynmous
  81. math

    what is the work of the square root of 3 to the second power minus 5 divided by 8

    asked by jack bakersfeild
  82. Math

    How do you round 0.0694 to the greatest place?

    asked by James
  83. Math

    (x+1)/3 + (3x - 2)/4 = (x + 5)/8 - (7x - 1)/6 - 37/12 I need the steps please...I know the answer

    asked by Sue
  84. Chemistry

    A pressurized can of whipped cream has an internal pressure of 1.080 atm at 25°C. If it is placed in a freezer at -8°C, what is the new value for its internal pressure What formula do I use for internal pressure?

    asked by Kellina
  85. math

    -16343-x=-343 Find x

    asked by Christina
  86. math

    Jacob opens a savings account on January 1 with a deposit of $350. He has "direct deposit," in which $25 is deposited every other week. The bank also charges a $3 monthly processing fee. How much money will he have at the end of the year?

    asked by Christina
  87. math

    I have 92 quarters, 46 dimes and 23 nickels in my jar. how money do i have

    asked by al
  88. General Chemistry

    An electron in a hydrogen atom relaxes to the n = 4 level, emitting light of 114 THz. What is the value of n for the level in which the electron originated? I am halfway through, but uncertain as to how to simplify the problem to completion. (6.63 x 10^-34

    asked by Confused
  89. math

    On a geo board how would you draw a right triangle that showed 4 units squared? would you draw it with the height being the length of 4 squares and the base being the length of 2 squares which would be 1/2 (b x h) which would be 1/2 (2 x 4) = 4 units

    asked by Brandi
  90. math

    round 529 to the nearest hundred

    asked by jp
  91. Pre Calculus

    (secx)/(tanx)+(cscx)/(cotx)=secx+cscx Please help me verify this trigonometric identity.

    asked by Lainey
  92. chemistry

    If 75mL of a hard water sample required 23.00 mL of .200 M EDTA, calculate the total hardness

    asked by Jen
  93. Microecon

    Using the midpoints approach to the cross elasticity of demand-calculate the cross eleasticity the demand for golf at all 3 prices. Price Demand1 D2 D3 50 15 10 15 35 25 15 30 20 40 20 50 D1 -Income $50k per yr, movies $9 D2 -Income $50k -movies $11 D3

    asked by AJ
  94. Science

    Each student is pulling with a force of 10 newtons

    asked by Annabelle
  95. check my precalc

    Rewrite each of the following as a product of linear factors 1. x^2+3 My Answer: (x+iroot 3)(x-iroot3) 2. x^2-2x+3 MA: (x-(1+iroot2))(x-(1-iroot2)) 3. x^4+x MA: IM not sure how to do it! can you help? 4. x^5-x^4+5x^3 MA:

    asked by Rebekah
  96. Physics

    An air puck of mass 0.289 kg is tied to a string and allowed to revolve in a circle of radius 0.51 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.98 kg is tied to it. The

    asked by Mary
  97. Statistics

    What critical t value would be needed to construct a 90% confidence interval on a sample of size 22? 1.717 1.323 2.080 1.321 1.721

    asked by Clueless
  98. Physics B

    An air puck of mass 0.289 kg is tied to a string and allowed to revolve in a circle of radius 0.51 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.98 kg is tied to it. The

    asked by Mary
  99. elementary

    please give me response.i don't have any idea from this science project. research graphic organizer we select dolphin.how to prepare that dolphin.which one is the best thing.can u explaine me

    asked by swetha
  100. math

    Dave swam 6 laps and did 9 dives at the swimming pool.crystal did 4 drives and swam 8 laps.how many more laps than drives did crystal and Dave do?

    asked by morgan
  101. english 90

    what is a strong theies statement when i start off saying it involves color, gender, and discrimination

    asked by jamisha harper
  102. chemistry

    How many moles are in 4.80 grams on SnO2?

    asked by Madison
  103. physics

    Two blocks are connected by strings and hung from the ceiling as shown. Tension T1 is 187 N and tension T2 is 78 N. Find the mass of each block.

    asked by tomas
  104. Geometry

    Suppose you have four identical pieces of wood like those shown below. If m

    asked by Stacey
  105. Physics

    A 45.4 kg of beer rolls down a 3.05 m long plank leading from the flatbed of a truck 0.880 m above the ground. Determine the amount of work (in Joules) done on the keg by gravity.

    asked by Hau
  106. math

    If half the batch of 6,000 vials are contaminated, what is the probability of finding no contaminated vials if only two vials are selected from the total amount produced?

    asked by Tim
  107. CHEM Periodic Trends

    Each of the statements below attempts to explain why some periodic property varies predictably among elements in the periodic table. Determine if each statement is true or false. Within a family, elements with higher atomic numbers have higher

    asked by Stacey
  108. physics

    moment of inertia of a ring perpendicular to tangent and its plane

    asked by sara
  109. algebra

    Describe a scenario that can be modeled with an inequality.

    asked by Anonymous
  110. Chemistry

    What is the total number of atoms in one unit (molecule or formula unit) of CO2? Then what is the total number of atoms in a mole of CO2 how do I figure this out please

    asked by Julie
  111. math

    What fraction is the same as 72%

    asked by Anonymous
  112. Statistics

    Suppose the mean height of a population is 65 inches with a standard deviation of 1.5 inches. What is the z value for a height (x) of 67 inches?

    asked by jassi
  113. Chemistry

    Given that the initial rate constant is 0.0190s^-1 at an initial temperature of 20 degrees Celsius, what would the rate constant be at a temperature of 170 degrees Celsius? Activation energy = 45.2kJ/mol

    asked by Tasnim
  114. Science- Please Help

    If glaciers worldwide were to melt, would temperature around the glacier rise, fall or remain the same as the glacier was melting?

    asked by Christine
  115. math

    2. Solve 2/3 =(x+5)/3 A. x = –3 B. x = 3 C. x = 2/3 D. No answer shown

    asked by ryanhamblin
  116. Math

    Jason made 34 bottles of flavored olive oil to give to his class. How many pints of flavored olive oil did Jason make if each bottle holds 8 fl oz? Does 16fl oz=1pt? And if It does how do I solve this problem

    asked by Jerald
  117. Chemistry

    How many moles of compound are in 1.55 x 10^3 Kg of carbon tetrafluoride, CF4

    asked by A.
  118. English

    We express our love for each other by exchanging gifts. (for each other) Is that a prepositional phrase? What is (by exchanging gifts)

    asked by Mark
  119. Angular Speed-Physics

    Stars originate as large bodies of slowly rotating gas. Because of gravity, these clumps of gas slowly decrease in size. What happens to the angular speed of a star as it shrinks? Explain.

    asked by Kaitlyn
  120. Math/Physics(Please check work)

    For an experiment on specific heat capacities of metal in physics, I am trying to calculate my percent error but am having some trouble. After collecting my experimental data for c (cal/g) for the object that was used which was aluminum my results are:

    asked by Hannah
  121. English

    you are a speaker in a school debate on the topic "Boys must not help in the kitchen" stand for the motion

    asked by Orville
  122. Chemistry

    Find the theoretical pH of .01M and .05M benzoic acid buffer when 2ml of .1MNaOH was added to each buffer.

    asked by Brad
  123. Childhood Education

    What items would you first look for to determine whether lead is present in the environment where children are present?

    asked by Brittany
  124. Math

    Im really struggling with these proving identities problems can somebody please show me how to do these? I'm only aloud to manipulate one side of the equation and it has to equal the other side of the equation at the end Problem 1. tanx-cotx =

    asked by Alycia
  125. Math

    A mower can cover 7.2 acres per hour. A newer model can cover 8.1 acres per hour. What percent more can the newer model cover?

    asked by Renee
  126. math

    A blue candle is twice as long as a red one. The blue takes 6 hours to burn out and red takes 15 hours. After 5 hours, what fractional part of each is left? Thanks for your help!

    asked by liz
  127. AP Psychology

    Why would a neurosurgeon cut the corpus callosum and therefore disrupt left/ right brain hemisphere communication? reduce anxiety attacks and phobic reactions. prevent the spread of epileptic seizures. reduce the incidence of violent behaviors. treat

    asked by Hi
  128. Science

    Use Dr.Vents results. Examine the graph . To increase the solubility , would you increase or decrease the temperature .

    asked by Luda
  129. Math

    James is making a quart of won ton soup using canned chicken broth. A can of chicken broth holds 14 fl oz. How many cans will James need to buy? 32 fl oz=1 qt? 3 cans?

    asked by Jerald
  130. calculus

    a rectangle has its base on the x-axis, and its upper corners in the graph of y=27-x^2. what is the maximal area of this rectangle?

    asked by michael
  131. Childhood Education

    How does poverty relate to a child's risk for inadequate health and well-being?

    asked by Brittany
  132. Physics

    A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the

    asked by Ashley
  133. math

    A blue candle is twice as long as a red one. The blue takes 6 hours to burn out and red takes 15 hours. After 5 hours, what fractional part of each is left? Thanks for your help!

    asked by liz
  134. economics

    According to your text, our main sources of ethical standards are religion and A. philosophy. C. culture. B. social habit. D. circumstances

    asked by jean
  135. Math

    1. 5yd=15ft 2.3yd=108in 3.6mi=10560yd 4.4mi=21120ft 5.72in=6ft 6.8ft=2yd and 2ft or 2.6

    asked by Jerald
  136. mg495

    You learn that 25 percent of the cost of goods sold and operating expense figures for 2009 are fixed costs that will not change in 2010. Reconstruct the pro forma income statement.

    asked by daniel
  137. geometry

    the heigth of a tree is 7.2 m its shadow is 2.4 m the meter stick is 1 m tall what is the length of te metersticks shadow?

    asked by cairo
  138. math

    27(2/3) 81(-3/2) how do i put those in radical form?

    asked by nolen
  139. math

    My hundredths digit is the product of 3 x 2. My tenths digit is the multiple of 3 that comes before the digit that is in the hundredths place. My thousandths digit could not be any greater. What number am I?

    asked by Josh
  140. language

    can u please help me unscramble this halloween word....."ouracland"

    asked by emily
  141. Physics

    A stone is released from an elevator going up with accelaration 'a' . The acceleration of the stone after release is ?

    asked by Ajai
  142. Chemisty

    Enrico Fermi was a famous physicist who liked to pose what are now known as Fermi problems in which several assumptions are made in order to make a seemingly impossible estimate. One example of a Fermi problem is "Caesar's last breath" which estimates that

    asked by Garcia
  143. math

    27(2/3) 81(-3/2) how do i put those in radical form?

    asked by nolen
  144. Biology

    Name of banana's stem,flower

    asked by Ajai
  145. Social Studies

    Did The CElts celebrate New Year's Eve in autumn?

    asked by Jerald
  146. composition&communication

    I have to think of situations that asking a question in my introductory paragraph wouldn't work but I can't think of any, any ideas?

    asked by Katelynn
  147. psych

    Alfred Binet's work is associated with intelligence testing visual perception psychopathology comparative psychology classical conditioning

    asked by george
  148. Parent

    the perimeter of the triangle is 55 inches. what is the value of X?

    asked by Pat
  149. Math

    Im really struggling with these proving identities problems can somebody please show me how to do these? I'm only aloud to manipulate one side of the equation and it has to equal the other side of the equation at the end Problem 1. (1-tanx) =

    asked by Alycia
  150. Math

    A multiple-choice test has four possible answers for each question. If a student guesses at the answer, what is the probability that he or she selects the correct answer

    asked by Pamela Straw
  151. science

    What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

    asked by john
  152. Math

    3. Factor completely and solve. Check your solutions. Show all work. 6x^3 – 15x^2 – 36x = 0

    asked by Anonymous
  153. Algebra

    May you please help me understand how to do this? Thanks Give the slope of a line perpendicular to the given line. 1. y=3x+5

    asked by Emma
  154. Physics

    A o.1 kg coin is placed on the horizontal surface of a rotating turntable at a position that is 0.12 m away from the center of the turntable. If the coefficient of static friction equals 0.3 between the coin and the turntable, what maximum speed, v, can

    asked by Aaron
  155. Chem

    What pressure (atm) is needed to confine an ideal gas to 68.0 L after it has expanded from 44.0 L and 2.3 atm at constant temperature?

    asked by Lena
  156. algebra

    if x% of y = 15 then y% of x = what?

    asked by kathy
  157. Math(Please check)

    For an experiment on specific heat capacities of metal in physics, I am trying to calculate my percent error but am having some trouble. After collecting my experimental data for c (cal/g) for the object that was used which was aluminum my results are:

    asked by Hannah
  158. Lang Arts

    1. How would you describe a deferred vacation? a. One that was booked several months ago. b. One that was delayed until a later time. c. One that was planned out many months ahead of time. 2. The speaker in the poem, “Mother To Son,” says the

    asked by Jman
  159. physics

    determine the energy of a photon radio wave electromagnetic radiation. i know which formula to use 6.64*10^-34 what

    asked by noorie
  160. Math

    After a reflection over the x-axis I have to find the coordinates of A1, B1, C1 I am having trouble with b1. A(1,4) B(3,-2) C(4,2) The reflection should be: A1 should be (1,-4) B1 ?????? C1 should be (4,-2) Can younhelp with the b1 coordinates and check my

    asked by George
  161. physics

    A ray of light is incident at an angle of 20degrees to the normal on one face of an equilateral prism made in glass of refractive index 1.523. Find the total deviation produced.

    asked by help please
  162. Chemistry

    Elemental analysis is performed on an organic liquid with a fishy odor. Vaporization of 260.0 mg of the compound in a 110 mL bulb at 100°C gives a pressure of 410.0 torr. What is the molar mass of this compound? whats the formula for this and do I need to

    asked by Kwame
  163. Chemistry

    A pressurized can of whipped cream has an internal pressure of 1.080 atm at 25°C. If it is placed in a freezer at -8°C, what is the new value for its internal pressure (in atmospheres)?

    asked by Brandon
  164. Calculus

    Find the volume of the solid obtained by rotating the region enclosed by y=x^3, y=25x, x ≥ 0

    asked by John
  165. Chemistry

    NAME THESE COMPOUNDS a)HOC(=O)CH(OCH3)CH=CHCH3 B)LiOC(=O)C(OCH3)HCH=CHCH3 C)C6H5OC(=O)C(OCH3)HCH=CHCH3 D)CH3CH2NHC(=O)C(OCH3)HCH=CHCH3

    asked by Arthur
  166. IT

    Can someone please help me start this? Using Shannon’s formula, calculate the data transfer rate given the following information: signal frequency = 10,000 Hz signal power = 5000 watts noise power =230 watts.

    asked by Mo
  167. Pre-Calculus

    An open box is to be made from a piece of cardboard 11 in by 17 in, by cutting out a square of length x from each corner and turning up the sides. Express the volume V of the box as a function of the length x of the side of the square cur from each corner.

    asked by Em
  168. Math

    What is 6x minus 6x? 0x or just 0?

    asked by Carly
  169. Chemistry

    Number these in order of ease of hydrolysis. 1= easiest to hydrolyze 4=hardest to hydrolyze C6H5C(=O)OC66H5 C6H5C(=O)OCl C6H5C TRIPLE BOND N C6H5(=O)NHC6H5

    asked by Arthur
  170. Chemistry

    Show the steps necessary to transform the compound on the left into the acid on the right (CH3)3CCH2BR ------------------>(CH3)3CCH2C(=O)OH

    asked by Arthur
  171. Physics

    What is the angular momentum (in J*s) of a mass of 1.45 kg which completes an orbit about a point 23.0 meters away every 5.30 seconds.

    asked by Steeve
  172. Pre-Cal

    How do I do these questions? I'm supposed to prove them so that both sides are the same and I'm only supposed to manipulate one side and leave the other side alone but I'm stuck. Problem 1. (secx/cosx)-(cscx/sinx)=tan^2x-cot^2x Problem 2.

    asked by Alycia
  173. math

    What is the slope of the line that passes through the points (–2, 5) and (1, 4)? –3 –2 –1/3 1/3

    asked by Deborah
  174. 7th Grade Art

    1. If you take this aesthetic view, you believe that how the artist used the elements and principles of art is the most important part of an artwork. -Civic View -Composition View 2. If you take this aesthetic view, you believe that the meaning, message,

    asked by Anonymous
  175. math

    A line has slope –. Through which two points could this line pass? A.(12, 13), (17, 10) B.(16, 15), (13, 10) C.(0, 7), (3, 10) D.(11, 13), (8, 18) I think it is A?

    asked by Deborah
  176. Math

    When 8 children go on a picnic, 6/8 of them wear jeans, how many wear jeans

    asked by Zane
  177. math

    A line has slope –. Through which two points could this line pass? A.(12, 13), (17, 10) B.(16, 15), (13, 10) C.(0, 7), (3, 10) D.(11, 13), (8, 18) I think it is A?

    asked by Deborah
  178. math

    What is the slope of a vertical line? –5 –2 2 5

    asked by Deborah
  179. Chemistry Class

    What is the molality of a solution made by adding 0.145 g of sodium acetate to 119 ml water? How do I find molality?

    asked by Trina
  180. Information Systems

    Richard's Plumbing Co. has rapidly grown to become a multi-state business, and it has recently acquired Mr. Plumber, a smaller company with multiple outlets located in the same states. Each of the companies has its own data network. Mr. Plumber's network

    asked by Mo
  181. Algebra

    steps to solving : 28-6x+4=30-3x

    asked by tod
  182. Statistics

    Opinion polls find that 13% of Americans "never have time to relax." If you take an SRS of 543 adults, the approximate distribution of the number in your sample who say they never have time to relax will be binomial with parameters: n= p=

    asked by Johnny
  183. math

    if 400 customers come to a grand opening and every 5th customers receives a coupon for jeans and every 7th customers receives a coupon for a free sweater. how many customers will leave with both

    asked by colin
  184. Math

    Im really struggling with these proving identities problems can somebody please show me how to do these? I'm only aloud to manipulate one side of the equation and it has to equal the other side of the equation at the end Problem 1. Sinx/(cotx+1) +

    asked by Alycia
  185. SS8R: Robber Baron or Captains of Industry Project

    Create a PowerPoint about your Captains of Industry (min. 7 slides) I chosen Andrew Carnegie, John D. Rockefeller, and Cornelius Vanderbilt for me previous assignment (that's why I ask you those questions about them). Now I have to choose ONE OF THEM to do

    asked by Laruen
  186. algebra

    A Square Has A Side Length Of S . Write A Rule In Function Notation To Represent The Perimeter

    asked by Aurora
  187. Physics

    A 58-kg vampire and 176-kg werewolf clash during the Feat of Strength part of the annual celebration of Festivus. The werewolf velocity just before the clash is 7 m/s and is directed upwards, while the vampire velocity at the moment of the collision is

    asked by Emily
  188. math

    7/12, 14/30 approximation which is greater

    asked by rick
  189. University Physics

    A 8.3-g bullet, when fired from a gun into a 1.1-kg block of wood held in a vise, penetrates the block to a depth of 7.05cm. This block of wood is next placed on a frictionless horizontal surface, and a second 8.3-g bullet is fired from the gun into the

    asked by Anonymous
  190. math

    How many pounds of candy selling for $2.25 a pound should be added to four pounds of candy selling for $4 a pound to create a blend, which will sell for $3.25 a pound?

    asked by JJ
  191. University Physics

    A 60-kg vampire and 194-kg werewolf clash during the Feat of Strength part of the annual celebration of Festivus. The werewolf velocity just before the clash is 5 m/s and is directed upwards, while the vampire velocity at the moment of the collision is

    asked by Anonymous
  192. statistics

    the monthly sales at a computer store have mean of $25,000 and a standard deviation of $4,000. profits are calculated by multiplying sales ny 30% and subtracting fixed cost of $60,000. find the mean and standard deviation of monthly profit

    asked by yetunde
  193. Physics

    A shopper pushes a cart 38 m south down one aisle and then turns 90.0° west and moves 25 m. He then makes another 90.0° turn and moves 17 m. (a) What is the largest possible displacement of the shopper? m ° counterclockwise from west (b) What is the

    asked by Mel
  194. science

    although each place on earth has its own climate,they can be grouped based on certain overall characteristics.what are the keys factors that scientist use to determine the climate of a particular place

    asked by Anonymous
  195. Chemistry

    A pressurized can of whipped cream has an internal pressure of 1.080 atm at 25°C. If it is placed in a freezer at -8°C, what is the new value for its internal pressure (in atmospheres)? I did this but got a negative number that wasn't correct

    asked by Brandon
  196. Physics

    A submarine dives 96 m at an angle of 24° below the horizontal. What are the two components? x = m y = m

    asked by Mel
  197. Physics

    Tom the cat is chasing Jerry the mouse on a table. Jerry puts on the brakes and stops and Tom continues right off the edge of the table at 4.00 m/s. If it takes Tom 0.50 seconds to hit the ground, then the table is approximately ____ meters high and Tom

    asked by Trish
  198. Physics

    a major league outfielder throws a baseball horizontally with a velocity of 22 m/s, released from a height of 1.8m. how far does it go before it hits the ground ?

    asked by Tavani
  199. math

    9. If possible, change each comparison of red paint to white paint to a percent comparison. If it is not possible, explain why. a. The fraction of a mix that is red paint is b. The ratio of red to white paint in a different mix is 2 to 5. 10. If possible,

    asked by fei
  200. Math

    Sarah is following a recipe that calls for 1 1/4 cups of flour. About how many cup of flour would she need to make 4/9 batch of the recipe?

    asked by Alicia
  201. Social studies

    What was the largest city in the 13 English colonies

    asked by Anonymous
  202. Physics

    The system shown in the figure is in equilibrium. A 15 kg mass is on the table. A string attached to the knot and the ceiling makes an angle of 54◦ with the horizontal. The coefficient of the static friction between the 15 kg mass and the surface on

    asked by Hardy
  203. Physics

    The essential part of the Hot Wheels speed booster is made of two fast spinning, rubberized disks of radius r=0.048 m each. The toy car entering the booster is in direct contact with both wheels, which send it away after brief encounter with it. When the

    asked by Emily
  204. working with children from culturally diverse

    which cultures are most closely aligned in valuing dependence over autonomy? American mainstream and Native American or Mexican American and Native American

    asked by ann
  205. PHYSICS

    When the speed booster is set up horizontally at the edge of a table (h=1.11 m) it sends a toy car of mass m=0.06kg in the projectile motion, so that it lands at horizontal distance of x1=1.36 m away from the edge of the table. When the sam car with the

    asked by Emily
  206. physics PLEASE HELP

    A hydraulic cylinder with a radius of 0.0268 m has a piston on the left end and a safety valve at the right end. The safety valve is a circular opening with a radius of 0.00639 m, sealed with a disk. The disk is held in place by a spring (spring constant =

    asked by Cat
  207. IT

    So how do industries deal with the impacts of mobile computing and convergence?

    asked by Sam Cook
  208. physics

    A car traveling in a straight line has a velocity of +5.5 m/s. After an acceleration of 0.65 m/s^2 , the car’s velocity is +8.9 m/s. In what time interval did the acceleration occur? Answer in units of s

    asked by leo
  209. physics

    A car traveling at +6.3 m/s accelerates at the rate of 0.65 m/s^2 for an interval of 2.2 s. Find vf . Answer in units of m/s

    asked by ak
  210. physics

    If a disk rotating at 900 rpm couples to a stationary disk with five times the moment of inertia, what is the angular speed of the combination?

    asked by Anonymous
  211. Math

    How many yards in 48in? Can you explain how to do it?

    asked by Jerald
  212. statistic

    in a random sample of 400 voter, 120 plan to vote for candidate A. determine a 95% confidence interval

    asked by John
  213. Chmistry

    what numerical values of l are possible for n=4

    asked by daphney
  214. Chemistry

    consider the following molecules:SiH4, PH3, H2S. What is similar about these molecules? What is different about these molecules and why?

    asked by Bhavna
  215. composition&communication

    I am in the middle of a draft for my final essay I would like to know what you think and if you think there is something that should be added, deleted, or changed please tell me. This essay is a compare/contrast essay about flat irons and curling irons. I

    asked by Katelynn
  216. chem

    Calculate the amount of heat transferred when 2.06 g of Mg(s) reacts at constant pressure. 2 Mg(s) + O2(g) ¨ 2 MgO(s) ƒ¢H = -1204 kJ

    asked by rebekah
  217. calculus

    Find the dimensions of the rectangle with the largest area that is inscribed inside the parabola y = 16- x^2 and the x-axis

    asked by Patrick
  218. Physics

    A line of identical train cars collide inelastically. (They couple.) Three carts are initially coupled and moving at speed v: the rest are stationary. The three moving cars hit a fourth, then those four hit a fth, and so on. This continues until the speed

    asked by NIck
  219. 5th grade math

    tulips are planted every four feet in a rectangular garden the sides are 16 feet and 12 feet how many tulips are there?

    asked by collin
  220. chemistry

    if 53.0mL of 0.150M of HCl is needed to neutralize all the NH3 from a 2.28g sample of organic material. what is the mass percent of notrogen in the sample?

    asked by lisa mendez
  221. Stats

    A student takes a 32 question multiple choice exam but did not study and randomly guesses each answer. Each question has three possible choices for the answer. Find the probability that the student guesses more than 75% of the questions correctly. (Round

    asked by Madmistro
  222. chemistry

    Assume you are performing the calibration step of Experiment 8 and you begin with 70 g of water at 20 oC and 70 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment,

    asked by san