angy

Most popular questions and responses by angy
  1. science

    Pleasee help i am really stuck A beachgoer leaves a pair of sandals on the shore while she swims. When she puts the sandals on again, the bottom of her feet will feel hot because _____. Choose all that apply.

    asked on October 15, 2018
  2. chemistry

    A potassium permanganate solution containing 1.58 g of KMnO4 per liter is added into 5 ml of an acidified iron (||) sulfate solution .Decolorizing of KMnO4 solution ceases when 10ml of the solution has been added. Calculate the mass of FeSo4.7H2O which has

    asked on January 17, 2016
  3. chemistry

    Consider an isomeric mixture of alkenes of molar mass M=70g/mol. Determine the molecular formula of the alkenes. Hyrogenation of the isomeric mixture produces alkanes. What is the name of the alkane. If the alkenes in the original mixture are in equimolar

    asked on March 19, 2016
  4. physics

    A monochromatic light of wavelength 587.5nm illuminates a slit of width 0.75mm. At what distance from the slit should a screen be placed so that the first dark fringe is at 0.85mm from the center of the diffraction pattern?

    asked on February 1, 2017
  5. physics help!

    A wire of 62cm length and mass 13g is suspended by a pair of flexible leads in a magnetic field of 0.44T. What are the magnitude and direction of the current required to remove the tension in the supporting leads? Please also scroll down because I also

    asked on May 31, 2016
  6. physics help

    A straight horizontal sretch of copper wire carries a current of 28 A .What are the magnitude and direction of the magnetic field needed to float the wire that is to balance its weight? Linear density=46.6g/m

    asked on May 31, 2016
  7. organic chemistry

    In an eudiometer 20cm^3 of a gaseous hydrocarbon A is mixed with 150 cm^3 of oxygen. The combustion of A is initiated by an electric spark. After cooling and condensing the vapor the volume of the gaseous mixture is 110cm^3 of which 80cm^3 causes turbidity

    asked on April 4, 2016
  8. math

    Z=2e^(ipi/4) What will the conjugate be ? - Z=?

    asked on September 29, 2016
  9. 11th chemistry

    The chlorination of ethane gives a compound with the percent composition by mass of chlorine in the compound is 71.7% A) find the molecular formula of this compound B) write the condensed structural formulas of the isomers of this compound and give their

    asked on March 7, 2016
  10. math

    Why is 25 a composite number?? Pleaseeeee help me!!!!!!!!!!!!!1 A. It is odd. B. It has more than two factors. C. All of its factors are prime numbers. D. It is not divisible by any number except one and itself. I PICKED b

    asked on October 25, 2018
  11. math

    can somebody help me to check my answer Identify if the first number is divisible by the second number, and if so, the reason why. Is 216 divisible by 3? A. No B. Yes, because the sum of 2 + 1 + 6 = 9, which is divisible by 3. C. Yes, because the last

    asked on October 16, 2018
  12. organic chemistry

    In an eudiometer 20cm^3 of a gaseous hydrocarbon A is mixed with 150 cm^3 of oxygen. The combustion of A is initiated by an electric spark. After cooling and condensing the vapor the volume of the gaseous mixture is 110cm^3 of which 80cm^3 causes turbidity

    asked on April 4, 2016
  13. Calculus

    A piece of wire x cm long is to be cut into two pieces, each to bent to be a square. the length of a side of one square is to be 9 times the length of a side of the other . Express the sum of the areas of two squares in term of x .

    asked on November 15, 2014
  14. chemistry

    A) what is the molar fraction of each gas in a mixture of 6g of hydrogen H2 and 7g of nitrogen N2 ? B) what is the total pressurd exerted by the above mixture in a volume of 15 l at a temperature of 0ºc ? C) what is the partial pressure of each gas in the

    asked on May 30, 2016
  15. physics

    Two bar magnets (1) and(2) orthogonal to each other create at point M (intersection of their supports) the respective magnetic field vectors B1 and B2 of intensity: B1=o.oo3T and B2=0.004T a)Determine the names of the poles of the magnets. b)Construct the

    asked on May 17, 2016
  16. 11th grade physics

    How do we know which plate has an excess of electrons?

    asked on April 12, 2016
  17. chemistry

    The alcoholic fermentation of350 g/l glucose syrup ceases when the alcoholic degree of the mixture attains 16º (16ml ethanol in 100ml of the solution) Write the reaction of the fermentation reaction. Consider the fermentation of 100L of the glucose syrup.

    asked on February 27, 2017
  18. math

    please help me!!!!!!!!!!! Identify if the first number is divisible by the second number, and if so, the reason why. Is 26 divisible by 2? A. No B. Yes, because 2 + 6 = 8 and 8 is divisible by 2. C. Yes, because the last digit is 6, which is divisible by

    asked on October 16, 2018
  19. math

    A room has 2 sections as shown in the picture below. Which expression uses the Distributive Property to find the total area of the room? the picture is a rectangle in the first section there us the number in the left side 14 in the bottom side 8 and in the

    asked on October 16, 2018
  20. chemistry

    Write the condensed structural formulas for the following alcohols."" Correct the incorrect names."" 4-methyl-1-pentanol 2-methyl-2-butanol 3-ethyl-1-butanol 2, 2-diethyl-4-pentanol 3-ethyl -2-hexanol IS THERE ANY WRONG NAMES??

    asked on June 22, 2016
  21. Chemistry

    A certain mass(m) of an impure iron sample of 40% purity ,is treated with an excess of HCl to give H2 that occupies 44.8 L at s.t.p ( Vm=22.4) where the yeild of the reaction is 0.8. A) calculate m. B) deduce the mass of HCl reacted. Thanks in advance!!

    asked on February 13, 2018
  22. physics

    An object initially at rest on a horizontal OX axis explodes into two pieces . One piece moves just after explosion along the axis OX with a speed of 6m/s. What are the direction and the magnitude of the velocity of the second piece whose mass is three

    asked on October 4, 2016
  23. chemistry

    Two compounds of molecular formula respectively C2H4O and C4H8O produce a yellow orange precipitate by the reaction DNPH. a)is this indication sufficient to write the structural formulas of these two compounds? Explain. b)what identification tests should

    asked on July 12, 2016
  24. math help

    In 2011 a spots club offers its members three types of activities: volleyball basketball and tennis. Each member practices only one of the three activities:30% of the members practice volleyball, 20% of the members practice basketball, the rest of the

    asked on May 16, 2016
  25. chem

    At 25ºC and 1 atmosphere the following equilibrium is eatablished :  2NO (g) N2O4 (g)  The partial equilibrium pressure of N2O4 is 0.7 atm.  A) calculate Kp of the above system at 25ºC.  B) calculate the partial pressure of the above two gases at

    asked on November 12, 2016
  26. physics

    Consider a stationary skater of mass 60 kg. Another skater of mass 40kg rushes and holds the first at a speed of 12km/hr. Both skaters hold together and move as one system (S) with a speed V. a) Determine V. b) Determine the kinetic energy of (S) before

    asked on October 4, 2016
  27. chemistry

    At 25ºC and 1 atmosphere the following equilibrium is eatablished : 2NO (g) N2O4 (g) The partial equilibrium pressure of N2O4 is 0.7 atm. A) calculate Kp of the above system at 25ºC. B) calculate the partial pressure of the above two gases at equilibrium

    asked on November 11, 2016
  28. physics

    A screen is placed 50cm away from a slit lit by a monochromatic light of wavelength 690nm. The distance seperating the first dark fringe and the third dark fringe in the diffraction pattern is 3mm. Calculate the width of the slit.

    asked on February 1, 2017
  29. chemistry

    Hydrochloric acid solution reacts with zinc according to the following equation: 2H3O + Zn -> Zn^2+ + H2 +2H2O 100ml of hydrochloric acid solution Ca=0.5mol/l must be prepared from C=5mol/l hydrochloric solution. 1) Specify the glassware needed for this

    asked on December 11, 2016
  30. physics

    A loop of surface area s1=10cm^2 placed ina uniform magnetic field Bof magnitude B1=8×10^-2T, has its plane perpendicular to the field lines . A second loop of area s2=15cm^2 is placed in another uniform field B2 of magnitude B2=0.1T such that its normal

    asked on November 10, 2016
  31. math

    How do we do integral (5cos4x cos8x dx)

    asked on October 7, 2016
  32. chemistry

    2NO+O2->2NO2 a) During a certain interval of time the variation of oxygen O2 moles is -5mol. Calculate the variation of the number of moles of nitrogen monoxide NO and that of nitrogen dioxide NO2 during the same interval of time. b) The duration during

    asked on September 20, 2016
  33. physics

    A capacitor A1B1 of capacitance C1=2microF is charged under a voltage U1=20V and then isolated. a) Calculate the voltage U (A1B1) between its plates, and it's charge Q1 and energy W1. b) The plates A1 and B1 are connected to those A2 and B2 of an uncharged

    asked on April 19, 2016
  34. physics

    Four identical positive charges q are placed at the four vertices of a square of side a. Determine the electric field: A) at the center of the square B) at te midpoint of one of its sides

    asked on March 19, 2016
  35. 11th grade chemistry

    The bottled butane gas is installed in an oven that can supply 0.125 g/hr .In a kitchen room of volume 32 m^3 (volume of air), the oven is made to operate for 2 hours. Assuming the kitchen room is closed, what is the mole composition of the atmosphere in

    asked on March 2, 2016
  36. physics help

    A disk is rotating at 50rps (revolution per second) about its fixed axis (delta) with respect to which its moment of inertia is J= 2×10^-2 kg.m^2 A braking couple of moment -0.5N.m is applied to the disk (the sense of rotation of the disk is taken as

    asked on February 4, 2016
  37. chemistry

    A hydrochloric acid So of concentration 1mol/l and a solution S1 of concentration C1= 2×10^-2 mol/l to be prepared from So. The available materials are given below: ● Volumetric pipet: 5ml, 10ml, 20ml ● Beakers: 100ml, 250ml, 500ml ● volumetric

    asked on December 13, 2016
  38. Curriculum Development

    Rosa doesn't want to finger paint. She is afraid she will get dirty. Ms. Moore should NOT: A. allow Rosa to stand by and simply observe the other children. B. invite Rosa to soap paint instead C. insist that she try it since Rosa can wash when finished. D.

    asked on March 21, 2016
  39. physics of grade 11

    Consider a simple pendulum consisting of a small marble of mass 10 g that can be onsidered a point mass suspended from the lower end of an inextensible string of length 80 cm and whose mass is negligible. The upperstring is connected to a fixed point O

    asked on February 24, 2016
  40. Chemistry

    A certain mass(m) of an impure iron sample of 40% purity ,is treated with an excess of HCl to give H2 that occupies 44.8 L at s.t.p ( Vm=22.4) where the yeild of the reaction is 0.8. A) calculate m. B) deduce the mass of HCl reacted. Thanks in advance!!

    asked on February 13, 2018
  41. multiple choice

    A magnetic flux through a circuit increases linearly with time, then the absolute value of the induced e.m.f A) increases because the flux is increasing B) decreases because according to Lenz's law it opposes the original increase of the flux C) stays the

    asked on November 10, 2016
  42. physics

    A puck is released on an air table inclined by 0.1rd with respect to horizontal. By applying the principle of conservation of the mechanical energy of the system ,calculate the velocity of the puck after 40 cm journey along a line of greatest slope.

    asked on September 19, 2016
  43. physics

    A particle B of mass 10g is shot vertically upward from a point O with velocity 10m/s. The horizontal plane containing O is the reference level of the gravitational potential energy .Neglect all air effects. a) Calculate the mechanical energy of the system

    asked on September 19, 2016
  44. physics check

    A straight line 1.8m long carries a current of 13A and make an angle of 15º with a uniform magnetic field B=1.5T Calculate the magnetic force on the wire. Do we use F=I×L×B×sin in order to solve or no

    asked on May 31, 2016
  45. 11th grade physics

    Four identical positive charges q are placed at the four vertices of a square of side a. Determine the electric field: A) at the center of the square B) at the midpoint of one of its sides

    asked on March 19, 2016
  46. chemistry

    a) The combustion of an organic compound in the presence of excess oxygen produced a gas , which makes clear lime water turbid. What element can be identified? 

    asked on February 14, 2016
  47. chemistry

    a) The combustion of an organic compound in the presence of excess oxygen produced a gas , which makes clear lime water turbid. What element can be identified?  b) A sample of this compound is treated with hot molten sodium metal, the obtained mixture is

    asked on February 13, 2016
  48. chemistry

    a) The combustion of an organic compound in the presence of excess oxygen produced a gas , which makes clear lime water turbid. What element can be identified? b) A sample of this compound is treated with hot molten sodium metal, the obtained mixture is

    asked on February 13, 2016
  49. physics help

    A disk is free to rotate around its fixed axis of revolution (delta). The moment of inertia of disk around delta is J=4×10^-2 kg.m^2 This disk is initially at rest is submitted to the action of a couple whose moment is equal to 0.2 N.m What's the number

    asked on February 4, 2016
  50. biochemistry

    what is the charge on each of the followin amino acid at physiologic pH: glutamate lysine valine tyrosine histidine

    asked on October 30, 2017
  51. chemistry

    We have 1L of 0.1mol/l solution of ammonium chloride, with pKa 9.2 for NH4+/NH3 Place in an increasing order on a pKa axis the different conjugate acid /base pairs present in the solution. Write the equation of the different reactions that may take place

    asked on January 15, 2017
  52. chemistry

    A bottle of commercial hydrochloric acid solution So is labeled 37% composition by mass, density 1.19 kg/L. Calculate the concentration of solution So. 4.2 ml of So are diluted to 500ml solution called S. We titrate S with 200 ml of KOH solution of

    asked on December 7, 2016
  53. physics

    A homologous rod of mass M=20kg of length L=3m and of negligible cross-section rests initially on the horizontal ground chosen as a reference level for the gravitational potential energy. The rod is rotated about one end until it takes a vertical position

    asked on September 19, 2016
  54. math

    A board of 4 members is going to be formed from the 30 students of a class. The board is formed of: a president a vice president a secretary and a treasurer. What is the number of possible boards knowing that each of the 30 students can occupy any post?

    asked on May 2, 2016
  55. 11th grade physics

    An electron is placed in a vertical electric field directed upward and of intensity E=5v/m. Compare the weight of the electron to the electrostatic force to which it is submitted. Deduce. Gravitational field strength: g=9.8m/s^2 Thanks.

    asked on March 31, 2016
  56. electric field

    Two equal positive charges q are placed at the opposite vertices of a square of side a. Determine and show on a diagram the electric field created by these three charges at the fourth vertex of the square. Thanks.

    asked on March 20, 2016
  57. physics

    A disk is rotating at 50rps (revolution per second) about its fixed axis (delta) with respect to which its moment of inertia is J= 2×10^-2 kg.m^2 A braking couple of moment -0.5N.m is applied to the disk (the sense of rotation of the disk is taken as

    asked on February 4, 2016
  58. math

    Solve: Sin (x-pi/3)=1/2

    asked on February 4, 2016
  59. physics

    As a warm-up for their juggling act, two clowns are tossing balls straight up in the air and catching them. While following the balls with his eyes, Joey says, ”Isn’t it strange how they just stand still in the air for a moment before they fall back

    asked on January 18, 2015
  60. computers

    meaning of input

    asked on September 25, 2007
  61. chemistry

    2. Write equations illustrating three reactions of alkenes, using 1-hexene as an example.

    asked on October 8, 2017
  62. chemistry

    1. How many monochlorinated compounds of molecular formula C3 H7 Cl can be made by chlorinating propane?

    asked on October 4, 2017
  63. physics

    Earth of mass 6×10^24 kg is in motion around the sun with a linear velocity of magnitude 30 km/s. a) Determine the magnitude of the linear momentum of the center of mass of Earth. b) Is this linear momentum conseved?

    asked on September 30, 2016
  64. chemistry plz helpp!

    A) 9.8g of an alcohol A completely reacts with an excess of sodium , and a gas is released. When the reaction ceases the volume of the gas is 1.6L measured at a temperature of 22ºc and under a pressure of 1 bar.  a- What gas is released in this reaction,

    asked on June 28, 2016
  65. chemistry

    A) 9.8g of an alcohol A completely reacts with an excess of sodium , and a gas is released. When the reaction ceases the volume of the gas is 1.6L measured at a temperature of 22ºc and under a pressure of 1 bar. a- What gas is released in this reaction,

    asked on June 28, 2016
  66. phsics multiple choice

    1)A coil of length 1cm has N turns and carries an electric current I. It creates at a point M a magnetic field of intensity B. -If a current 3I is sent in the coil the field strength at M becomes: a. 3B b. B/3 c. B -If the number of turns per unit length

    asked on May 17, 2016
  67. math

    in a certain town 40% of men are smokers. It is known that 6% of men in this town have lung disease. Of those men having lung disease 85% are smokers. A man is selected at random from this town. Consider the events: D and S. 1)Calculate the probability of

    asked on May 17, 2016
  68. physics multiple choice

    1)A coil of length 1cm has N turns and carries an electric current I. It creates at a point M a magnetic field of intensity B. -If a current 3I is sent in the coil the field strength at M becomes: a. 3B b. B/3 c. B -If the number of turns per unit length

    asked on May 17, 2016
  69. english

    I've got a research paper about diamonds and I need to limit my topic about it . Can somebody tell me topics about diamonds please?

    asked on May 6, 2016
  70. english

    How to write a research paper?

    asked on April 24, 2016
  71. english

    How do we know if the writer followed introduction body conclusion organizational pattern?

    asked on April 17, 2016
  72. english

    How do we explain: Why the pattern of organization is addition?

    asked on April 17, 2016
  73. chemistry

    1-What are the characteristics of the benzene molecule and those of the obtained product(1,2,3,4,5,6-hexachlorocyclo hexane). 2-The volume of used chlorine Cl when added to benzene is 240cm^3. What minimal volume of benzene is needed so that all of

    asked on April 13, 2016
  74. chemistry

    1-What are the characteristics of the benzene molecule and those of the obtained product(1,2,3,4,5,6-hexachlorocyclo hexane). 2-The volume of used chlorine Cl when added to benzene is 240cm^3. What minimal volume of benzene is needed so that all of

    asked on April 13, 2016
  75. 11th grade physics

    A parallel condenser of 0.8F is to be constructed using sheets of tin foil each 30cm.25cm and separated by a paraffin waxed paper 0.015cm thick of dielectric constant Find how many sheets of metals are required?

    asked on April 12, 2016
  76. physics

    What should be the magnitude of force F for the velocity of G to be constant?

    asked on February 16, 2016
  77. english

    For what purpose does the writer use short paragraphs

    asked on February 9, 2016
  78. english

    When we are asked "What's the function of the paragraph of the reading text" How shall we answer it

    asked on February 8, 2016
  79. physics

    Solid A of mass 50 kg resting on a smooth 45º incline is maintained in equilibrium by means of the light string passing over the pulley and holding at its other end a solid B of mass m. Make the inventory of the forces acting on A. Determine graphically

    asked on January 14, 2016
  1. math

    i know i am annoying but pleaseeeeeeeeeeee helppppppppppppppp!!!!!!!

    posted on October 25, 2018
  2. math

    Pleaseeeeee help i don't want to be late to brand practice!!

    posted on October 25, 2018
  3. science(check answers)

    thanks!

    posted on October 24, 2018
  4. math

    so 26 is divisible by 3

    posted on October 16, 2018
  5. math

    that makes sense scott

    posted on October 16, 2018
  6. math

    what the heck the last two numbers are 16 not 26

    posted on October 16, 2018
  7. math

    plus 6 is divisible by 3 i think

    posted on October 16, 2018
  8. math

    is it reasonable i think so because 6 is a divisible of 2 and so is 2

    posted on October 16, 2018
  9. math

    I can get Jim I have the same question but different numbers he trying to say how tall the plant has grown from now to the last time the gardener checked it i think you have to subtract 60 - 52 and you will get your answer

    posted on October 16, 2018
  10. science

    nobody cares

    posted on October 16, 2018
  11. math

    it does have to do with the area

    posted on October 16, 2018
  12. math

    please help me

    posted on October 16, 2018
  13. Math

    coolllllllllllll thanks

    posted on October 16, 2018
  14. MATH

    what is the answer

    posted on October 16, 2018
  15. math

    thankyouuuuuuuuuuuuu!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    posted on October 16, 2018
  16. Science

    i think it is c

    posted on October 15, 2018
  17. science

    A. the sandals were warmed by radiation B. heat will transfer to her feet by radiation C. heat will transfer away from her feet by conduction D. heat will transfer to her feet by conduction i picked a and d

    posted on October 15, 2018
  18. science

    pleaseee help me I am stuck with this for 20 minutes!!!!!!!

    posted on October 15, 2018
  19. science

    I have a question in science A beachgoer leaves a pair of sandals on the shore while she swims. When she puts the sandals on again, the bottom of her feet will feel hot because of _____. Choose all that apply.

    posted on October 15, 2018
  20. science

    i am using connexus or snowline

    posted on October 15, 2018
  21. science

    Thank you your the best

    posted on October 15, 2018