Popular questions and responses by Joshua
  1. Physics

    A force of 50N extends by a material by 0.05 m. Calculate the force constant. (a) 10.0 N/m (b) 100.0 N/m (C) 1000.0 N/m (d) 10,000.0 N/m

    asked on July 3, 2020
  2. Chemistry

    what is the lowest frequency photon that can ionize a hydrogen atom with excited state electron configuration 3s1

    asked on December 7, 2016
  3. Further math

    The sum of the 3rd and 7th term of an AP is 38 and the 9th term is 37. Find the AP.

    asked on February 24, 2019
  4. Pre-Calculus

    Find all of the fifth roots of 32i?

    asked on March 29, 2018
  5. Science

    A gun fires a shell at an angle of elevation of 30 degrees with a velocity of 2*10^3m/s. What is the horizontal and vertical component of the velocity? What is the range of the shell? how high will the ball rise

    asked on September 29, 2012
  6. Math

    If 7 1/4 boxes of parts weigh a total of 68 7/8 pounds, what does one box of parts weigh?

    asked on May 30, 2015
  7. Chemistry

    A 100.0 g sample of water at 27.0°C is poured into a 77.4 g sample of water at 89.0°C. What will be the final temperature of the water?

    asked on March 14, 2013
  8. English arts 1 Nouns

    Aaron plans to attend college once he completes this course workbook. im suppose to identify the nouns in the sentence the nouns are Aaron,college,workbook right? im debating on course idk? help lol

    asked on May 3, 2012
  9. Chemistry

    Calculate the pH of (1)0.150M KC2H3O2: (2)0.200M pyridine chloride, C5H5NHCl: and(3) 0.500M NaCl

    asked on February 21, 2011

    1. which of the following elements of comedy are not used by Shakespeare in the merchant of venice? a. a clown like character b.puns c.slapstick d.clever language its either c or d i chose c am i correct? 2.which of the following is not a theme of the

    asked on July 14, 2018
  11. Arithmetic series

    Suppose you are given the arithmetic sequence 3,6,9,...,99.What is the sum of the terms of this sequence?

    asked on July 26, 2018
  12. Math

    The owner of a small business is aiming to increase sales by ₱1000 weekly. If this condition is met, how much should be the sales on the first week to reach exactly ₱75 000 worth of sales in ten weeks? Type your answer without the peso sign.

    asked on July 25, 2018
  13. Physics

    Two men decide to use their cars to pull a truck stuck in mud. They attach ropes and one pulls with a force of 972 N at an angle of 28 degrees with respect to the direction in which the truck is headed, while the other car pulls with a force of 1401 N at

    asked on March 17, 2011
  14. Math

    If there are 600 people in a concert audience, 3/10 are male and 5/6 are older than 10 years of age,how many people in the audience are female

    asked on February 12, 2019
  15. Science

    why would a piece of wood float on water and sink in methylated spirit

    asked on October 23, 2017
  16. Physics

    A 95 kg halfback makes a turn on the football field. The halfback sweeps out a path that is a portion of a circle with a radius og 12 meters. The halfback makes a quarter of a turn around the circle in 2.1 seconds. Determine the speed, acceleration and net

    asked on May 9, 2017
  17. home economics

    mention the types of disposal of fullness?

    asked on February 7, 2013
  18. Science math

    Suppose a laboratory has a 38 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 1104 days? How much polonium is in the sample 1104 days later?

    asked on January 7, 2013
  19. maths

    What is the length of an arc of a circle that subtends 2 1/2 radians at the centre when the radius of the circle is 8cm

    asked on October 17, 2016


    asked on November 19, 2017

    on a partime job you are asked to bring a cylindrical iron rod of legnth 85.8 cm and diameter 2.85 cm from a storage room to a machinist. will you need a cart? (to answer calculate the weight of the rod.)

    asked on July 22, 2016
  22. Chem Uni. Urgent!!!

    Have to find theoretical yield of recrystallization of acetanilide from water. 1 gram of crude product used (85% acetanilide, 14% Sodium chloride and 1% charcoal) I got 0.50 grams of purified product. With percent recovery of : (0.50g/1.00g)* 100% = 50%.

    asked on February 3, 2015
  23. science

    The living plants that are most similar to the first plants to bear gametangia are the _____. a) charophyceans b) seedless vascular plants c) angiosperms d) gymnosperms e) bryophytes

    asked on September 22, 2009
  24. Mathematics

    Hi there, Can someone help me with the question: "Prove that the value of 7sinx +3cos2x cannot be greater than 5/1/24 for all values of x between 0 degrees and 360 degrees" Thanks lots. =) I've already simplified 7sinx + 3cos2x into (2sinx-3)(3sinx+1).

    asked on October 14, 2008
  25. English

    can someone please check my answers. 1.)which of the following lines best demonstrates the tone of ''the nymph's reply to the shepherd'' by sir walter raleigh? a. "the flowers do fade,and wanton fields/to wayward winter reckoning yields;" b." then these

    asked on September 25, 2018
  26. English

    can someone please check my answers 1.) which of the following is the best example of a paradox? a.death be not proud ,though some have called thee/mighty and dreadful. b.though art a slave to fate,chance,kings and desperate men. c.and death shall be no

    asked on September 10, 2018

    1. Which of the following elements of comedy are not used by Shakespeare the merchant of Venice? a.a clown like character b.puns c. slapstick d.clever languuage its either c or d i chose c am i correct? 2.which of the following is not a theme of the

    asked on July 12, 2018
  28. English

    Which Of The Following Descriptions From ''The Mirror'' Is An Example Of Personification? A. The Mirror Is Silver And Exact. B. The Candles And Moon Are Liars. C.The Opposite Wall Is Pink With Speckles. D.A Women's Face Replaces Darkness. This Is From

    asked on March 18, 2018
  29. Math

    Name the point with the given coordinates (4,-2).

    asked on March 5, 2017
  30. math

    if 4.5 pounds of cherries cost $10, what is the unit price per pound

    asked on November 10, 2015
  31. math

    A student is attempting to factor a polynomial. Sample mathematical work is shown below. Which statement best applies to the sample mathematical work? Given 3x + 6, the factors of the first term are 3 and x, and the factors of the second term are 1, 2, 3,

    asked on September 22, 2014
  32. Physics

    A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

    asked on November 19, 2012
  33. Data Management

    A box contains 14 yellow, 6 green, 10 purple, and 12 red candies jumbled together. What is the expected number of red candies among 5 candies poured from the box?

    asked on May 2, 2012
  34. ecology


    asked on September 6, 2008
  35. chemistry

    Match the correct mole ratio to the substances in the reactions below. carbon monoxide to iron in the reaction: Fe2O3 + CO ==> Fe + CO2 water to manganeese(II) chloride in the reaction: HCl + MnO2 ==> H2O + MnCl2 + Cl2 sodium to oxygen in the reaction: Na

    asked on February 29, 2008
  36. English

    to marguerite-continued by matthew arnold poem yes in the sea of life enisled,with echoing straits between us thrown,dotting the shoreless watery wild,we mortals live alone.the islands feel the enclasping flow,and then their endless bounds they know.but

    asked on March 22, 2019
  37. English

    london by william blake poem i wander through each chartered street, near where the chartered thames does flow, and mark in every face i meet marks of weakness,marks of every cry of every man,inevery infant's cry of fear,in every voice,in very

    asked on March 19, 2019
  38. English

    can someone who is knowledgeable in english literature please check my answers thank you. 1.)which of the following phrases from ''the rear-guard'' is an oxymoron? a.''blackening wound'' b.''stinking place'' c.''rosy gloom'' d.''unanswering heap'' i chose

    asked on March 17, 2019

    Which Of The Following Lines Best Demonstrates The Tone Of The Nymph's Reply To The Shepherd By Sir Walter Raleigh? a.the flowers do fade and wanton fields/to wayward winter reckoning yields. b.then these delights my mind might move/to live with thee and

    asked on July 12, 2018
  40. math

    Use scalar multiplication to find the coordinates of the vertices of each figure for a dilation centered at the origin with the given scale factor. Parallelogram JKLM with J(−4, 3), K(−4, 7), L(2, 7), M(2, 3); r = 5 Thank you!

    asked on February 25, 2018
  41. Chemistry

    What is the concentration of a monoprotic weak Acid if its pH is 5.50 and its Ka= 5.7 x 10^-10?

    asked on July 28, 2016
  42. Chemistry

    a solution of HCL is approximately 0.1M and has to be standardized . 1.234g Na2CO3 are dissolved to make 100ml of solution. 20mL of this solution are titrated with the HCL solution, requiring 31.3mL for the second equivalence point. what is the exact

    asked on January 9, 2015
  43. Physics 221

    An object starts from rest at the origin and moves along the x axis with a constant acceleration of 4m/s^2. Its average velocity as it goes from x=2m to x=8m is: A. 1m/s B. 2m/s C. 3m/s D. 5m/s E. 6m/s An object is released from rest and falls a distance H

    asked on August 26, 2007
  44. chemistry

    calculate the percentage of sulphur in sodium thiosulphate, Na2S2O2

    asked on November 13, 2019
  45. Math

    A craft shop buys stuffed animals with a list price of $8,000. If the wholesaler offers trade discounts of 25/25/25, find the net price factor.

    asked on October 17, 2019
  46. English

    to marguerite-continued by matthew arnold poem yes in the sea of life enisled,with echoing straits between us thrown,dotting the shoreless watery wild,we mortals live alone.the islands feel the enclasping flow,and then their endless bounds they know.but

    asked on March 20, 2019
  47. English

    can someone please check my answers 1.what is the best way to figure out a poem's theme? a.look for a line in which the poet states the theme directly. b.infer the theme from details,images,and symbols. c.analyze the rhyme scheme and meter of the poem.

    asked on December 5, 2018
  48. math

    A segment with endpoints C(-3, 3)and D(7, 3) is the diameter of a circle. a. What is the center of the circle? b. What is the length of the radius? c. What is the circumference of the circle? d. What is the equation of the circle?

    asked on March 21, 2018
  49. Chemistry

    how many molecules of sulphuric acid is needed to neutralize 5ml of potassium bicarbonate (iv)acid when calcium is heated at temperature 200 calcius using nickel as catalyst

    asked on January 6, 2018
  50. Math

    If two fair dice are​ rolled, find the probability that the sum of the dice is 6​, given that the sum is greater than 3.

    asked on September 22, 2016
  51. math

    Cynthia has a bag of jellybeans. There are two red jellybeans, one yellow jellybean, and two black jellybeans in her bag. Cynthia grabs two jellybeans and gives them to her friend, Pedro, and he eats them. What is the probability that she gives him two red

    asked on May 3, 2016
  52. math

    two boats p and q are at points whose position vector are 4i+8j and 4i+3j respectively. both of the boats are moving at a constant velocity of p is 4i+j and q is 2i+5j. find the position vectors of p&q and pq after t hours, and hence express the distance

    asked on February 6, 2016
  53. Programming

    using c++ write a program that accepts the unit weight of a bag of coffee in pounds and the number of bags sold and display the number of bags sold ,the weight per bag price per pound sales tax and total price of the sale.the unit of a bag of coffee is

    asked on October 7, 2015
  54. Physics

    how much does a 2 lietr bottle of soda pop weigh in pounds? assume that the pop has the density ofg water,namely 1 kg\lietr and that the weight of the bottle itself is negligible?

    asked on July 14, 2014
  55. calculus

    The question is: tan(arcsinx)= I know that inverse of sin is 1/sqrt(1-x^2) however this question still confuses me. The outcome is x/sqrt(1-x^2), how did the tan create the additional x ?

    asked on October 16, 2013
  56. chemistry

    85.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452 My answer

    asked on March 26, 2013
  57. math

    A student completed 44% on a test. He completed 22 question. Then how many questions are on the test

    asked on December 17, 2012
  58. English-metaphors

    Is this quote a metaphor? "That's a bright direction, there's a glowing there." In context it seems like a metaphor since the direction she is looking in is not actually bright or glowing. there was a lot of text for the question but I thought it e too

    asked on February 20, 2012
  59. Math

    Jim Gray invested $8,500 four times a year in an annuity due at All-Star Investments for a period of 3 years at an interest rate of 12% compounded quarterly. Using the ordinary annuity table , calculate the total value of the annuity due at the end of the

    asked on December 3, 2011
  60. Physics

    An infinite thread of charge density lamda lies along Z axis. The potential difference between the points A(4,3,4) and B (3,4,0)is?

    asked on March 21, 2011
  61. Chemistry

    Calculate the pH of (1)0.150M KC2H3O2: (2)0.200M pyridine chloride, C5H5NHCl: and(3) 0.500M NaCl

    asked on February 21, 2011
  62. University Physics

    Determine an equation for the total force needed to drag a box at constant speed across a surface with coefficient of kinetic friction uk when the force is applied at an angle theta.

    asked on February 12, 2011
  63. Calculus

    We're doing optimization problems and this is one that I am having trouble with: Suppose a business can sell x gadgets for p=250-0.01x dollars apiece, and it costs the business c(x)= 100+25x dollars to produce x gadgets. Determine the production level and

    asked on May 3, 2009
  64. biology

    what is the the equation for photosynthesis?

    asked on August 4, 2008
  65. History

    What aspects of european society did the church dominate from 1100 to 1300?

    asked on October 20, 2007
  66. Physics 221

    1. throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration might be: A. positive and negative, respectively B. negative and positive, respectively C. negativa and negative,

    asked on August 26, 2007
  67. algebra

    A system of equations consisting of a linear equation and a quadratic equation ____ has two solutions. a. always b. sometimes c. never ** The solutions given by the quadratic formula are ____ integers. a. always b. sometimes ** c. never Can someone check

    asked on April 23, 2020
  68. Math

    Calculate: The first term of a linear sequence is 5 and the common difference is 3, find the 15th term of the sequence

    asked on December 27, 2019
  69. Mathematics

    Solve, if the first term of an Ap is equal to one half of the common difference d, find the 8 term of the Ap

    asked on November 11, 2019
  70. Internet safety

    What is one purpose of fair use laws

    asked on October 29, 2019
  71. Math

    Zahir Antiques purchases merchandise having an invoice price of $12,900. The terms of sale are 3/15, n/30. What is the cash discount if the bill is paid by the 15th day? I have no idea how to do this:(

    asked on September 20, 2019
  72. English

    can someone please check my answers 1.)what is the best way to figure out a poem's theme? a.look for a line in which the poet states the theme directly b.infer the theme from details,images,and symbols c.analyze the rhyme scheme and meter of the poem d.use

    asked on March 25, 2019
  73. Algebra

    Find the unknown digit to make the sentence true 2.48>2.4__ 1>2.463 5.723

    asked on October 1, 2018
  74. English

    1.)my first question is which of the quotes from henry's speech represents an appeal to the head? a. '' we are apt to shut our eyes against a painful truth, and listen to the song of that siren, till she transforms us into beasts.'' b.''has great Britain

    asked on March 10, 2018
  75. science

    The temperature in the room is rising because the explosion is releasing _____ energy into the air, increasing the speed of the air molecules in the room.

    asked on March 5, 2018
  76. chem

    The dibasic compound B (pKb1 = 4.00, pKb2 = 8.00) was titrated with 1.00 M HCl. The initial solution of B was 0.100 M and had a volume of 100.0 mL. Find the pH at the following volumes of acid added and make a graph of pH versus Va; Va=0, 1, 5, 9, 10, 11,

    asked on January 22, 2018
  77. math


    asked on December 21, 2017
  78. Math

    figure RSTU is a rectangle. if m of angle SUT = 3x + 6 and m of angle RUS = 5x - 4, find m of angle SUT

    asked on December 2, 2016
  79. maths

    A shape ABCDE is made up of an isosceles triangle and a rectangle. The perimeter of ABCDE is 46cm. 1) what is the length of AB?

    asked on November 6, 2016
  80. maths

    Three numbers add up to 180. The second number is twice the first, and the third number is three times the first. WHAT IS EACH NUMBER?

    asked on November 3, 2016
  81. math

    the number has 5 digits the value of the largest digit is 90,000 the value of the thousands place is the same value in every place the sum of the hundreds place and the tens place is 7 the value of the smallest value is 4 97,774

    asked on October 25, 2016
  82. math

    the sum of two numbers is 25. the second number is 5 more than the other one. find the numbers.

    asked on July 23, 2016
  83. math

    the product of three numbers is 315.if two of the numbers are 7 and 9 .what is the third number?

    asked on July 20, 2016
  84. physics

    a uniform rod 100cm long and weighing 50N is supported in a horizontal position on a fulcrum with weights 80N and 100N suspended from its end. compute the position of a fulcrum.draw the illustration.

    asked on July 4, 2016
  85. Physics

    A circuit employs a silicon solar cell to detect flashes of light lasting 0.25 s. The smallest current the circuit can detect reliably is 0.32 μA . Assuming that all photons reaching the solar cell give their energy to a charge carrier, what is the

    asked on May 6, 2016
  86. trigonometry

    Nikki bought a triangular lot whose sides are 9 meters, 12 meters, and 15 meters long. if it cost her 3500 pesos per square meter, how much did she pay for the lot?

    asked on December 28, 2015
  87. math

    according to information from NASA, the space shuttle has a capacity of about 500,000 gallons of fuel. Write three numbers that could represent the space shuttle's actual fuel capacity? I don't understand the question.

    asked on November 11, 2015
  88. Math

    Which of the following is equal to the expression below?

    asked on October 28, 2015
  89. math

    A merchant purchased a number of coats, each at the same price, for a total of $720. He sold them at $40 each, thus realizing a profit equal to his cost of 8 coats. How many did he buy

    asked on October 15, 2015
  90. American Government

    The fourth branch of government refers to

    asked on May 25, 2015
  91. auto repair technician

    Is there anyone taking the automobile technician course in penn foster wanting to team up to study together. I'm having trouble with exam #004846

    asked on August 19, 2014
  92. Chem

    How many grams of water could have its temperature raised from 25 ºC (room temperature) to 100 ºC (the boiling point of water) by the amount of energy released in the formation of 4.0 mol of H2 from hydrogen atoms? The bond energy of H2 is 435 kJ/mol.

    asked on July 1, 2014
  93. chemistry

    please help! how do i find the molecular mass of C3H5O2 molecular mass of 292 g.

    asked on March 25, 2014
  94. Math

    A dog ate 48 bones. The other dog ate 47 bones. How much bones did both dogs eat?

    asked on February 6, 2014
  95. College Physics

    1. In a region of two-dimensional space, there are three fixed charges: +1 mC at (0, 0), −2 mC at (18 mm, -3 mm), and +3 mC at (-8 mm, 12 mm). What is the net force on the −2-mC charge? Find the magnitude and direction (counterclockwise from the

    asked on July 9, 2013
  96. English/Literature

    I have to write an essay, but I just need help with coming up with some ideas. In the essay, I have to compare/contrast the plays "Ajax" OR "Electra" (both are by Sophocles) with the "Iliad" (by Homer). I CANNOT mention similarities/differences in plot

    asked on October 23, 2012
  97. English

    Combine each pair of sentences use and,but,or, to join the two predicates The total suprised us. The total pleased us.

    asked on September 17, 2012
  98. Maths

    The sum of the 2digits of a 2 digit number is 15. If th number formed by reversing the digits is less than the orginal number by 27.Find the orginal number

    asked on May 8, 2012
  99. Algebra2

    The area of a rectangular field is x^2-x-72 m^2. The length of the field is x+8 m. What is the width of the field in meters?

    asked on April 5, 2012
  100. Trigonometry

    Add and subtract as indicated. Then simplify your answer if possible. Leave answer in terms of sin(θ) and/or cos(θ). (Remember to enter trigonometric powers such as sin2(x) as (sin(x))2.) 1/sin-sin=

    asked on January 30, 2012


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