Danny

Newest questions and responses by Danny
  1. English

    She forfeited the tennis match on or of her own volition?

    asked on February 21, 2019
  2. English question

    No matter how hard she studied nemesis was always able to get a one point better. Is this a good use of the word nemesis,

    asked on February 21, 2019
  3. English simple question

    She forfeited the tennis match in or on her own volition. Is it correct to say in or on

    asked on February 21, 2019
  4. Math

    Gabriella’s travel shampoo bottle holds 1/2 cup of shampoo before leaving on vacation she filled the bottle to the top with 1/8 cup of shampoo how much shampoo was already in the bottle?

    asked on September 10, 2018
  5. Optics

    The famous Chinese magician Foo Ling Yu performs a classic magic trick using a concave mirror with a focal length of 1.6 m. Foo uses the mirror to produce an image of a light bulb that is the same size as the light bulb itself and is at the same location.

    asked on June 5, 2018
  6. Trig

    How would you show that sin(x+pi)=-sin x? I’m not sure how to start so if someone can tell me how to start it I should be able to do the rest.

    asked on May 28, 2018
  7. Trig

    the graph of an inverse trigonometric function passes through the point (1,pi/2). which of the following could be the equation of the function Y=Cos^-1 x Y=cot^-1 x Y=Sin^-1 x Y=Tan^-1 x

    asked on March 6, 2018
  8. physics

    calculate the horizontal force that must be applied to produce an acceleration of 72 m/s^2 for a 0.034 kg punk on a friction less air table

    asked on December 1, 2017
  9. Biology

    Why can viruses of the family of the Poxviridae be genetically modified more easily than viruses of most other viral families? A. Because their genome is smaller. B. Because their genome is made of DNA. C. Because their genome mutates more slowly. D.

    asked on October 2, 2017
  10. Math

    It is a prime number. The number is less than 30,greater than 20. The sum of thedigit is less than 10. What is the mystery number

    asked on May 8, 2017
  11. English Grammar 5th grade

    Answers for suffixes colorful, late, northern, troubled, straight, friendly, dry, safe, useful, flat, willing, early, hungry, blue, worst, sad. Thanks! For Helping me!

    asked on April 27, 2017
  12. Physical Science

    Answer the following in terms of volume, temperature, and/pressure. As a syringe plunger is pushed down, why does the marshmallow inside the syringe get squished even though the plungerr never touched it? What law does this demonstrate?

    asked on April 24, 2017
  13. ELA

    In Sitton Spelling and Word Skills Practice Book, What is the answers antonyms: after less south remember against tall unimportant import evening backward unusual disorganized rebel periphery temporary latter Synonyms: change assist deficit revive

    asked on April 19, 2017
  14. Biology

    1. How do mutations play into the fitness of an organism? 2. Describe how variation, selection and time fuel the process of evolution.

    asked on April 9, 2017
  15. Biology

    1. How do mutations play into the fitness of an organism? 2. Describe how variation, selection and time fuel the process of evolution.

    asked on April 9, 2017
  16. alg 2 first final study guide

    f (x) =2X^3 + 2x^2 - 3x + 2 please help me set up to find all the real number zeros of the function

    asked on December 9, 2016
  17. Math

    Jessica played on the school chess team last year. She won 65% of the games She played. If She won 13 games, How many did She playi?

    asked on November 17, 2016
  18. Calculus - Word Problems

    Suppose a spherical snowball is melting at a constant rate of 0.20in per hour. How fast is the volume changing when the radius is 10in?

    asked on November 14, 2016
  19. Calculus - Optimization

    The post office ships a package using large package rates if the sum of the length of the longest side and the girth (distance around the package perpendicular to its length) is greater than 84in and less than or equal to 108in. Suppose you need to ship a

    asked on November 14, 2016
  20. Calculus

    The post office ships a package using large package rates if the sum of the length of the longest side and the girth (distance around the package perpendicular to its length) is greater than 84in and less than or equal to 108in. Suppose you need to ship a

    asked on November 14, 2016
  21. Chemistry

    Consider the following reaction. 2Fe2O3 --> 4Fe+3O2 Hrxn=+824.2 The Formation of 21.0 of Fe results in 1)the release of 77.5 kJ of heat. 2)the absorption of 3.10 × 102 kJ of heat. 3)the release of 4330 kJ of heat. 4)the absorption of 77.5 kJ of heat.

    asked on October 30, 2016
  22. math

    The measures of the three angles of a triangle are given. Find the value of x and state whether the triangle is acute, obtuse, or right. x + 10, x − 20, x + 25 I got x is 55 and it is an acute angle. Is that correct?

    asked on October 10, 2016
  23. Pre-Calculus

    A hemispherical bowl with a 30-centimeter radius contains some water, which is 12 centimeters deep. Find the volume of the water.

    asked on October 10, 2016
  24. Math

    what is the largest 3 digit even number you can make with the digits 1,2, and 3?

    asked on September 27, 2016
  25. Maths (quadratic equation) need help

    In an unknown fraction the denominator is one more than twice the numerator. When 2 1/10 is added to this fraction, the result is equal to the reciprocal of the unknown fraction. Find the unknown fraction. (Hint; the the numerator of the fraction to be the

    asked on May 31, 2016
  26. help science

    3 simple steps for DNA duplication I have found so many answers but cant get a concise one. 1. separation - of 2 dna strands unzips ? 2. duplicates ? 3. zips back up ? and then a simple sentence about each

    asked on May 29, 2016
  27. 7th grade science final

    review Question -- 3 simple steps for DNA duplication I have found so many answers but cant get a concise one. 1. separation - of 2 dna strands unzips 2. duplicates 3. zips back up and then a simple sentence about each

    asked on May 29, 2016
  28. Math Trigonometry

    A plane flies in a direction of 85° from Chicago. It then turns and flies in the direction of 200° for 150 miles. It is then 195 miles from its starting point. How far did the plane fly in the direction of 85°? I am confused about aereal navigation. Can

    asked on May 19, 2016
  29. Math

    The student mr. Davis class either walk or ride the bus to school the number of students ride the bus is a tenant in the number of students who walk is 12 is there a 450 students in the school how many students total can you expect to ride the bus

    asked on May 14, 2016
  30. scte

    a 90 volt Hz source is connected to 0.1 Henry inductor.what is the current through the inductor?

    asked on April 26, 2016
  31. LO

    a newspaper article to warn people against engaging with fraud

    asked on April 24, 2016
  32. A.P. Chem

    Based on like dissolve like, determine if these compounds will be more soluble in water or an organic solvent. 1) Sodium Butyrate I think Water 2) Phenol I think organic 3) Aniline I think water 4) Sodium phenoxide I think water

    asked on April 12, 2016
  33. Math

    Show using integration by parts that: e^3x sin(2x)dx = 4/26 e^3x (3/2 sin(2x) - cos(2x)) +c Bit stuck on this. Using rule f udv = uv - f vdu u = e^3x dv + sin(2x)dx f dv = v du/dx = 3e^3x v = -1/2 cos(2x) so uv - f vdu: = (e^3x)(-1/2 cos(2x)) - (-1/2

    asked on March 24, 2016
  34. Physics

    A 5 kg block is being pulled on a frictionless surface by a string at an angle of 30o to the horizontal. The tension in the string is 30 N. What is the total work done on the block as it moves a distance of 10 m?

    asked on March 21, 2016
  35. calculus

    the vector function r(t)=< 5 sin t, 3 sec t > , represents the position of a particle at time t. find the velocity v (t) and acceleration a (t). I don't know how to solve it without the t given. Please help

    asked on March 21, 2016
  36. Calculus

    Rectangular sheet of metal 750mm by 300mm - find length of the sides of the squares to give max volume to the box, and find maximum volume of the box?

    asked on March 19, 2016
  37. Chemistry

    If I am doing a fractional distillation, is the temperature of the first few drops of the distillation considered part of the boiling range? Or do you wait until later in the distillation?

    asked on March 16, 2016
  38. Chemistry

    You start with a 20ml mixture of two compounds. After distillation you end up with 10ml of distillate 1 and 8.4ml of distillate 2. What is the relative volume percent of each compound in the pre-distilled mixture? (Do I just do: volume percent of

    asked on March 14, 2016
  39. Science

    Is Gc (32.2 lbmft/lbfs^2) equal to gravity? I think it is, but I'm kinda confused about the whole concept. Could someone explain it to me? Thank you very much.

    asked on March 9, 2016
  40. Physics

    Is Gc (32.2 lbmft/lbfs^2) equal to gravity? I think it is, but I'm kinda confused about the whole concept. Could someone explain it to me? Thank you very much.

    asked on March 9, 2016
  41. Chemistry

    Why is methanol a good solvent to recrystallize biphenyl?

    asked on February 25, 2016
  42. MATHS

    In a class of 30 learners,17 play football,15 play vollyball,12 play rugby.9 learners play vollyball only and 3 play rugby only.If all learners play at least one of the three sports.Use a venn diagram to find the number of learners who pray only vollyball

    asked on February 17, 2016
  43. Physics

    A 6.80 x 10^4 kg space shuttle moving at 7.90 x 10^4 m/s reenters the earth's atmosphere 80.0 km above the earth's surface. What is the shuttle's total mechanical energy with respect to earth's surface? I know the answer is E= 2.173 x 10^12J But I don't

    asked on January 27, 2016
  44. Economics Macro

    Suppose that real GDP per capita in the United States is $49,000. If the long-term growth rate of real GDP per capita is 1.6% per year, how many years will it take for real GDP per capita to reach $98,000?

    asked on January 25, 2016
  45. Statistics

    On the third day of Statistics, my teacher gave to me….three French hens. Because she is in a hurry, she randomly selects three pets from the local pet store. Find the probability that she selected three French hens. Hens Chickens French 10 20 American

    asked on December 23, 2015
  46. mechanics

    Short column of rectangular cross section 160mm by 60mm carrying point load of 40 KN at max eccentricity position along the longer axis so that no tensile stress is applied. I worked out max eccentricity as 26.66 mm from RH and LH, and compressive stress

    asked on November 26, 2015
  47. Mechanical engineering

    An I section beam of 4m length with end supports is required to carry a point load of 50 KN at its mid pint. The maximum bending stress is limited to 85 MPa, and Modulus of Elasticity of the steel s 200 GPa. Evaluate maximum bending moment that will be

    asked on November 26, 2015
  48. Algebra 2

    Solve system by substitution or elimination x+4y=13 2x+3y=6

    asked on November 13, 2015
  49. Algebra

    If Angela runs up 5 steps of the escalator, then it takes her 40 seconds to reach the top of the escalator. If she runs up 14 steps of the escalator, then it takes her only 26 seconds to reach the top.

    asked on September 11, 2015
  50. Presbyterian Boys' Senior High

    Q, P and R are three villages on a level ground. Q is 4km on a bearing of 040° from P, while R is 3km on a bearing of 130° from Q. Calculate the distance and bearing of P from R.

    asked on September 4, 2015
  51. math

    Sarah Meeham blends coffee for Tasi-Delight. She needs to prepare 140 pounds for blended coffee beans selling for $5.07 per pound. She plans to do this by blending together a high-quality bean costing $6.50 per pound and a cheaper bean at $2.50 per pound.

    asked on July 14, 2015
  52. Maths

    Have a question on complex numbers. Z1= 1+j2, Z2= 2+j5 Find total impedance in Cartesian and polar form of two impedances in parallel: 1/ZT = 1/Z1 + 1/Z2 I get to 39/58 + 83/58 j but then get a bit lost.

    asked on May 20, 2015
  53. chemistry

    What mass of solute is contained in 250 mL of 0.895 M NH4Cl? I think that this is a molarity question. Molarity = mass of solute/volume of solution in L. 1 mL = 0.001 L so 250 mL * 0.001 L = 0.25 L 0.895 M = X (mass of solute)/ 0.25 but since the answer is

    asked on May 7, 2015
  54. Economics

    can someone help me put (yuan depreciates against the dollar into one stanza of a song.

    asked on May 5, 2015
  55. physics

    A fixed mass of gas has a pressure of 8700 Pa, a volume of 10.5 m3 and temperature of 68 °C. The pressure and volume of the gas are changed to 9 243 Pa and 14.4 m3. The new temperature of the gas is

    asked on May 4, 2015
  56. chemistry

    An atom whose nucleus contains 7 neutrons and which has a mass number of 12 is an isotope of what element?

    asked on April 27, 2015
  57. chemistry

    What is the approximate effective nuclear charge for arsenic ?

    asked on April 27, 2015
  58. chemistry

    q4 What element has the greatest first ionization energy? Li Na K Rb Cs

    asked on April 27, 2015
  59. chemistry

    Consider an electrochemical cell based on the reaction: 2H+(aq) + Sn(s) = Sn2+(aq) + H2(g). Which of the following actions would NOT change the measured cell potential? lowering the pH in the cathode compartment addition of more tin metal to the anode

    asked on April 19, 2015
  60. chemistry

    What is the oxidation state of the vanadium atom in VO4−

    asked on April 16, 2015
  61. chemistry

    Consider an electrochemical cell based on the reaction: 2H+(aq) + Sn(s) = Sn2+(aq) + H2(g). Which of the following actions would NOT change the measured cell potential? lowering the pH in the cathode compartment addition of more tin metal to the anode

    asked on April 16, 2015
  62. chemistry

    Which element is reduced in the unbalanced reaction below? I− + MnO4− + H+ = I2 + MnO2 + H2O I no reduction occurred in this reaction O H Mn

    asked on April 16, 2015
  63. chemistry

    How many electrons does the Au+ ion have ? Enter an integer below without any letters or symbols.

    asked on April 15, 2015
  64. Physics

    I have a question on fluids. Water in a section 1.2m wide, 2m high. retained by sluice gate that can pivot about its base. There is a retaining cable at the top of the gate. Determine tension in the retaining cable at the top of the gate when the depth of

    asked on April 13, 2015
  65. Mechanical Principles

    I have a question on fluids. Water in a section 1.2m wide, 2m high. retained by sluice gate that can pivot about its base. There is a retaining cable at the top of the gate. Determine tension in the retaining cable at the top of the gate when the depth of

    asked on April 13, 2015
  66. Physics

    Is this correct?? Metal block weighs 500g in air and 446g completely submerged in water. Calculate density and relative density. Density of water = 1000kg/m3 BF (Buoyant force) will be 500g-446g = 0.54 g (or 0.054 kg). For volume: If BF =

    asked on April 10, 2015
  67. Chemistry

    Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the reaction NH4NO3(s) −! N2O(g) + 2H2O(§¤) . How much NH4NO3 is required to produce 54.5 g of N2O?

    asked on April 9, 2015
  68. Chemistry

    027 (part 1 of 3) 10.0 points Copper reacts with silver nitrate through single replacement. If 3.03 g of silver are produced from the reaction, how much copper(II) nitrate is also produced? Answer in units of mol. 028 (part 2 of 3) 10.0 points How much Cu

    asked on April 9, 2015
  69. Chemistry

    Calculate the mass of water formed by the complete reaction of 572 g of propane (C3H8) with excess oxygen. (Write a balanced equation.) Answer in units of g.

    asked on April 9, 2015
  70. Mechnical principles

    Mtal block weighs 500g in air and 446g completely submerged in water. Calculate density and relative density. I know relative density is density of material/density of water (1000kg/m-3)

    asked on April 9, 2015
  71. chemistry

    At a certain elevation, the boiling point of water is 98.5°C. How much energy is needed to heat 35.0 mL of water to the boiling point at this elevation if the water initially was at 23.4°C? (Cp=75.38J/(mol*C), d= 1.00g/mL)

    asked on April 1, 2015
  72. Calculus 1

    How do you find the derivative of 1/3(x^2+2)^3/2 ? Please help

    asked on March 31, 2015
  73. physics

    A 5.0 Ω resistor, a 9.0 Ω resistor, and a 12.0 Ω resistor are connected in parallel across a 24.0 V battery. a) What is the equivalent resistance of the circuit? Answer in units of Ω b) What is the current in the 5.0 Ω resistor? Answer in units

    asked on March 23, 2015
  74. chemistry

    The average swimming pool has a volume of about 28,000 gallons. Suppose a swimming pool was filled with pH 7.00 water. However, you need to adjust the pH to 4.75. How much acid pool acid (which is 1.00 M HCl) do you need to add to the pool? The units are

    asked on March 21, 2015
  75. chemistry

    You need to determine the pKa of a weak, monoprotic acid. You add 0.500 moles of the acid to 1.00 L of water. The resulting pH was 1.87. What is the pKa of this weak acid? You may ignore the autoionization of water. 2.74 3.43 5.38 2.01 1.87

    asked on March 21, 2015
  76. chemistry

    All of the following acid-base pairs are examples of buffers EXCEPT: (Question from "Cracking the MCAT, 2010-2011 edition" by The Princeton Review) HCl/NaCl CH3CO2H/NaCH3CO2 HF/NaF H2CO3/NaHCO3 I chose ch3co2h/nach3co2

    asked on March 21, 2015
  77. chemistry

    What is the pH of 500 mL of water that had 0.00150 grams of NaOH added to it? The units are pH units with an error interval of 0.1 units. 0.00150 divided by 40NaOH 3.75e-5 divided that by 500= 7.5e-8 -log7.5e-8 =7.12 im lost on the last step

    asked on March 21, 2015
  78. chemistry

    The Ka of hypochlorous acid (HClO) is 3.00×10-8 at 25.0°C. Calculate the pH of a 0.0385 M hypochlorous acid solution. a.1.41 b.7.52 c.-1.41 D.4.47 E. 8.94 I got B 7.52 but i feel like im wrong

    asked on March 21, 2015
  79. chemistry

    A 300 mL solution of 0.0500 M HCl is titrated with 1.00 M KOH. How many mL of the KOH solution will be needed to reach the equivalence point of this titration? A.5 mL B.10 mL C.50 mL D20 mL E15 mL The answer i got was E. 15ml

    asked on March 21, 2015
  80. chemistry

    Which of the following acids is expected to be the strongest acid? CH2F-COOH CF3-COOH CH3-COOH CCl3-COOH CBr3-COOH i chose ccl3-cooh

    asked on March 21, 2015
  81. chemistry

    Which of the following chemicals are bases or can behave like bases? You may select more than one compound. KOH PO43- NH3 F-

    asked on March 21, 2015
  82. chemistry

    Which of the following chemicals are bases or can behave like bases? You may select more than one compound. Cu2+ RbOH CH3COO- Br-

    asked on March 21, 2015
  83. chemistry

    Which of the following chemicals are strong bases? You may select more than one compound. CH2=CH2 Ca(OH)2 NH3 RbOH

    asked on March 21, 2015
  84. chemistry

    The Ka of hypochlorous acid (HClO) is 3.00×10-8 at 25.0°C. Calculate the pH of a 0.0385 M hypochlorous acid solution. A.1.41 B.7.52 C.-1.41 D.4.47 E.8.94 I chose B

    asked on March 21, 2015
  85. physics

    How many kilometers would you have to go above the surface of the earth for your weight to decrease to 39{\rm \\%} of what it was at the surface? Express your answer using two significant figures.

    asked on March 9, 2015
  86. physics

    A highway curve with radius 1000ft is to be banked so that a car traveling 56.0mph will not skid sideways even in the absence of friction At what angle should the curve be banked?

    asked on March 9, 2015
  87. Physics

    A baseball player with a mass of 79 kg slides into homeplate. The coefficient of kinetic friction between the player and the ground is μk = 0.632. If the player comes to rest after 1.04 s, what is his initial speed?

    asked on March 4, 2015
  88. Calculus Physics

    Imagine a spaceship on its way to the moon from the earth. Find the point, as measured from the center of the earth, where the force of gravity due to the earth is balanced exactly by the gravity of the moon. This point lies on a line between the centers

    asked on March 2, 2015
  89. Calculus Physics

    A glass of orange juice is on the floor of a subway car traveling along a straight path at constant velocity. Everything's fine. The coefficient of static friction between the glass and the floor is 0.32. The subway suddenly accelerates forward. What is

    asked on March 2, 2015
  90. chemistry

    One of the ways to produce iron is to take iron(II) oxide and react it with carbon monoxide to get pure iron and carbon dioxide. The reaction is FeO(s) + CO(g) = Fe(s) + CO2(g). What is the partial pressure of CO2(g) if 2.00 atm of CO and excess iron(II)

    asked on February 28, 2015
  91. chemistry

    Lead iodide is a relatively insoluble compound. It can dissolve from the solid phase into the aqueous phase with a Keq of 0.00027. If the concentration of lead iodide in the aqueous phase 0.125 M, then: a. we need more information to determine the progress

    asked on February 28, 2015
  92. chemistry

    Equilibrium is: a dynamic condition in which the concentration of the reactants is equal to the concentration of the products. a static condition in which the concentration of the reactants is equal to the concentration of the products. a static condition

    asked on February 28, 2015
  93. Science check

    Water in the upper zones of the ocean will have more oxygen than water in deeper zones. true or false i think true.

    asked on February 27, 2015
  94. physics

    PART ONE: A charge of 4.70μC is at the origin and a second charge of −2.85μC is on the positive x-axis 1.08 m from the origin. Find the magnitude of the electric field at a point P on the y-axis 0.640 m from the origin. The value of the Coulomb

    asked on February 26, 2015
  95. chemistry

    The following equilibrium exists in a closed container: N2(g) + O2(g) = 2NO(g), ΔH = +181 kJ/mol. Which of the following perturbations would favor the formation of NO(g)? (practice MCAT question from The Princeton Review MCAT Science Workbook, 2009

    asked on February 25, 2015
  96. chemistry

    Suppose you have the following reaction at equilibrium: N2(g) + 3H2(g) = 2NH3(g), ΔH = −22 kcal/mol What changes are expected to occur if the temperature of the system was decreased. You may select multiple answers. The concentration of NH3(g) would

    asked on February 25, 2015
  97. chemistry

    1) C2H2O4(aq) = H+ (aq) + C2HO4- (aq); Keq = 6.5E-2 2) C2O42- (aq) + H+ (aq) = C2HO4- (aq); Keq = 1.64E+4 then what is the equilibrium constant for the following reaction: C2H2O4(aq) = 2H+ (aq) + C2O42- (aq)? Keq = 1070 Keq = 227 Keq = 2.21E-4 Keq =

    asked on February 25, 2015
  98. chemistry

    The pollutant NO is formed in diesel engines. The reaction fixes atmospheric nitrogen with oxygen to form NO. The reaction is: N2(g) + O2(g) = 2NO(g). If the equilibrium constant for this reaction at elevated temperatures is 5.60E-11, then what is the

    asked on February 25, 2015
  99. chemistry

    How is the reaction quotient used to determine whether a system is at equilibrium? The reaction is at equilibrium when Q > Keq. At equilibrium, the reaction quotient is undefined. The reaction quotient must be satisfied for equilibrium to be achieved. The

    asked on February 25, 2015
  100. chemistry

    Which of the following statements is not true? 1.Chemical equilibria are examples of reversible processes. 2.When multiple reaction steps are in equilibrium, then the equilibrium constant for the net reaction is the product of the individual reactions.

    asked on February 25, 2015

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