Popular questions and responses by Paige
  1. Chemistry

    A sheet of aluminum foil has a total area of 1.000 ft squared and a mass of 3.636 grams. What is the thickness of the foil in millimeters? (Density of Aluminum is 2.699 grams/cm cubed.)

    asked on September 12, 2008
  2. math

    Generate the first five terms in the sequence using the explicit formula. cn= 12n – 11 (1 point)

    asked on February 26, 2013
  3. Physics

    What is the age in years of a bone in which the ratio 14C/ 12C is measured to be 2.3×10^−13?

    asked on December 6, 2011
  4. Physics

    Zinc has a work function of 4.30 ev . A 4.50eV photon strikes the surface and an electron is emitted. What is the maximum possible speed of the electron?

    asked on November 28, 2011
  5. Physics

    Problem 19.33 Two light bulbs are 1.0 m apart. Part A - From what distance can these light bulbs be marginally resolved by a small telescope with a 3.0cm -diameter objective lens? Assume that the lens is limited only by diffraction and wavelenght = 600nm .

    asked on November 5, 2011
  6. American History

    Which best explains why the unemployment rate changed dramatically by 1942? A.US mobilization for World War II created new jobs producing weapons. B.Americans fled to Canada during the Great Depression, causing a decrease in the unemployment rate. C.The US

    asked on May 11, 2020
  7. Chemistry

    Describe the subatomic structure of the nucleus, including the structure of each nucleon. Draw a picture. Describe the forces that hold the nucleus together and draw them on your diagram. Explain how beta emission works.

    asked on May 24, 2013
  8. Math

    The present value of the money in your savings account is $420, and you're receiving 3% annual interest compounded monthly. What is the future value in two months?

    asked on May 4, 2012
  9. Maths - Probability

    Tickets numbered 1 to 1000 were sold in a raffle for which there was one prize. Mr Kahn bought all the tickets containing at least one '3' because '3' was his lucky number. What was the probability of Mr Kahn winning?

    asked on December 4, 2010
  10. math

    The back of Dante's property is a creek. Dante would like to enclose a rectangular area, using the creek as one side and fencing for the other three sides, to create a corral. If there is 200 feet of fencing available, what is the maximum possible area of

    asked on October 31, 2019
  11. Physics

    What is the age in years of a bone in which the ratio 14C/ 12C is measured to be 2.3×10^−13?

    asked on December 6, 2011
  12. Physics

    Problem 17.26 A thin film of (MgF2) n= 1.38 coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500nm and 625nm . Part A - What is the thinnest film for which this can occur?

    asked on November 6, 2011
  13. Physics

    Problem 21.40 A pair of 10uF capacitors in a high-power laser are charged to 1.7kV. Paige Nieuwenhuis Part A - What charge is stored in each capacitor? Express your answer using two significant figures. Part B - How much energy is stored in each capacitor?

    asked on September 13, 2011
  14. Math

    The record for the Boston Marathon's wheelchair division is one hour 18 minutes and 27 seconds A) The Boston Marathon is 26.2 miles long what was the average speed of the record winner of the wheelchair division round to the nearest hundredth B) at this

    asked on August 31, 2015
  15. Calc 2

    Find a Cartesian equation for the polar curve y = 5tan(theta)sec(theta). I think I got it but I just wanted to double check. Thanks in advance!

    asked on April 18, 2011
  16. math

    twice the product of 3 and -2 added to the product of -7 and 5

    asked on May 23, 2018
  17. physics

    A block is attached to a horizontal spring and set in simple harmonic motion, as shown in the figure. At what point in the motion is the speed of the block at its maximum? The position of the block when the spring is relaxed is marked by x = 0, and the

    asked on April 11, 2014
  18. physics

    Bird bones have air pockets in them to reduce their weight–this also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone in air and in water and finds its mass is 43.0 g

    asked on April 10, 2014
  19. math

    Explain how to factor 5x^2 - 125.

    asked on May 15, 2013
  20. calculus

    Determine the values of x, if any, at which each function is discontinuous. At each number where f is discontinuous, state the condition(s) for continuity that are violated. f(x) = x+5 if x0

    asked on January 27, 2013
  21. physics

    The three charges shown in Figure P16.17 are at the vertices of an isosceles triangle. If q = 16.0 10-9 C, calculate the electric potential at the midpoint of the base. V Figure P16.17

    asked on May 15, 2012
  22. physics

    The speed of an electron is known to be between 3.0×10^6 m/s and 3.3×10^6 m/s . Estimate the uncertainty in its position.

    asked on November 26, 2011
  23. Math

    The area of the trapezoid student election sign is 5 square ft find two possible values for each base

    asked on February 3, 2020
  24. Criminal Justice

    This is my final exam for connections academy in the subject criminal justice: 1.which is not legal requirements for the issuance of a search warrant? a. The suspect must grant permission for the search b.the investigator must file an affidavit with the

    asked on April 29, 2019
  25. Science

    Describe the flow of blood in the human body, including through each four chambers of the heart.Explain how the blood changes as it moves through various locations of the body

    asked on February 9, 2016
  26. algebra

    Adult tickets to a play cost $2.25 each and student tickets cost $1.75 each. Suppose there are twice as many student tickets sold as adult tickets. If the income from the play was $1,150, how many of each type of ticket were sold?

    asked on September 9, 2014
  27. Calculus

    Determine the values of x, if any, at which each function is discontinuous. At each number where f is discontinuous, state the condition(s) for continuity that are violated. f(x)= x+5 if x is less than or =0 -x^2+5 if x>0

    asked on January 27, 2013
  28. math

    h worked the following problem incorrectly. Part 1) In which line was the mistake made? Part 2) Show your work and give the correct answer? Line 1 40 ÷ 5(3 − 1) − 4 Line 2 40 ÷ 5(2) − 4 Line 3 40 ÷ 10 − 4 Line 4 4 − 4 Line 5 0

    asked on March 21, 2012
  29. Government--Please Check

    In the case McCulloch v. Maryland, the Supreme Court held that _____. My answer1.)the Necessary and Proper Clause gave the federal government broad rights not mentioned in the Constitution 2.)federal government could not create a national bank 3.)the Bill

    asked on March 13, 2012
  30. Physics

    How do you find the acceleration of an object on a velocity-time graph if the acceleration of the object is at t = 5 s in m/s2?

    asked on January 29, 2012
  31. Physics

    Sally travels by car from one city to another. She drives for 40.2 min at 80.0 km/h, 12.0 min at 105 km/h, and 45.0 min at 40.0 km/h. She spends 13.7 min eating lunch and buying gas. (a) Determine the total distance traveled in km. (b) Determine the

    asked on January 26, 2012
  32. phyics

    Calculate (in MeV ) the binding energy per nucleon for 40 Ca .

    asked on December 5, 2011
  33. physics

    Problem 17.8 Light from a sodium lamp (wavelength = 598) illuminates two narrow slits. The fringe spacing on a screen 150 cm behind the slits is 4.0 mm . Part A - What is the spacing (in mm ) between the two slits? Express your answer using two significant

    asked on November 8, 2011
  34. Physics

    Problem 17.8 Light from a sodium lamp (wavelenght = 589) illuminates two narrow slits. The fringe spacing on a screen 150 cm behind the slits is 4.0 mm . Part A - What is the spacing (in mm ) between the two slits? Express your answer using two significant

    asked on November 7, 2011
  35. physics

    Problem 25.49 A 1.40-m-diameter MRI solenoid with a length of 2.80 m has a magnetic field of 2.50 T along its axis. Part A - If the current is turned off in a time of 1.2 s, what is the emf in one turn of the solenoid's windings? Express your answer using

    asked on October 9, 2011
  36. Physics

    A parallel-plate capacitor consists of two square plates 18 Cm on a side, spaced 0.50 mm apart with only air between them. What is the maximum energy that can be stored by the capacitor?

    asked on September 12, 2011
  37. Physics Class

    A crowbar is used to wrench open a wooden crate. The crowbar is situated so that a point 8 cm from the end digging into the box acts as a pivot point. The crobar is gripped on the other side, 29 cm away from the pivot. If the person exerts a force of 110

    asked on April 28, 2011
  38. physics

    If you shout across a canyon and hear an echo 3.6 s later, how wide is the canyon?

    asked on April 27, 2010
  39. Physic

    What determines whether an object is a net emitter or a net absorber of radiant energy? Wood is a better insulator than glass. Yet fiberglass is commonly used as an insulator in wooden buildings. Explain.

    asked on January 30, 2008
  40. English

    write either for or against the topic a single sex school is better than a mixed school

    asked on November 6, 2019
  41. math

    A Dish TV satellite dish is the shape of a paraboloid. The dish is 42 inches wide, and 10 inches deep. How many inches should the receiver be located from the vertex for optimal reception? (round to the nearest thousandth)

    asked on October 21, 2019
  42. English

    In Red Badge of Courage - “Maturity is reached by the road of experience” is an example of what? • exposition • theme*** • characterization

    asked on December 22, 2018
  43. calculus

    Use define integrals to calculate the area under the graph of y=tanx between x=a to x=b. (hint: write tangent in the form of sinx/cosx) How would you do this?

    asked on November 4, 2018
  44. chemistry

    Oxygen gas and aqueous benzoic acid react to form carbon dioxide gas and water gas. Determine the mass of water in grams if 5.43×104 milligrams of oxygen reacts with an excess of benzoic acid. I balanced the equation to 2C7H6O2+15O2=14CO2+6H2O

    asked on October 30, 2016
  45. Math

    A pizza parlor has 13 different toppings available for its pizzas, and 2 of these toppings are pepperoni and anchovies. If a customer picks 2 toppings at random, find the probability that neither topping is anchovies.

    asked on October 18, 2016
  46. Chemistry (equilibrium)

    C2H6(g) C2H2(g) + 2 H2(g) The ΔH° for the reaction above is +312 kJ. The system is initially at equilibrium. In which direction will the reaction shift in each of the following situations? e) The temperature is decreased. g) He is added at constant

    asked on September 10, 2016
  47. Algebra

    what is the value of c so that x^2+13x+c is a perfect square trinomial I need HELP ASAP!!!

    asked on April 15, 2016
  48. Algebra

    23. what is the value of c so that x^2+13x+c is a perfect square trinomial I need HELP ASAP!!!

    asked on April 15, 2016
  49. Math dimensional anaylsis

    To make a banner for a football game: 9 yard banner can be made in 3 hours. What is the rate of work in feet per minute?

    asked on August 18, 2015
  50. Maths

    How to find an angle using measurements

    asked on April 5, 2015
  51. Physics

    PHYS1111_HMWK02_Vectors_and_2DKinematics » Eddie the Eagle Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 62.2 m horizontally

    asked on February 2, 2015
  52. Physics

    A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. The ball leaves her club at an angle of 37.0° above the ground, with a speed of 31.1 m/s. Find the time that the ball is in the air

    asked on February 2, 2015
  53. physics

    Which of the following statements about a system in resonance is true A.The energy of the system is always increasing. B.The greater the damping the larger the amplitude of the oscillations C.The driving force is always in the direction of the velocity.

    asked on April 16, 2014
  54. science

    a 1.0 kg metal head of a geology hammer strikes a solid rock with a speed of 3.9 m/s. assuming all the energy was retained by the hammer head, how much will its temperature increase?

    asked on April 8, 2014
  55. science

    Please help!!!! Explain how mutations in DNA may affect the traits of an individual

    asked on November 22, 2013
  56. chemistry

    Is CO2 a product of an acid/base reaction?

    asked on November 12, 2013
  57. Math

    Quentin has 18 unit cubes. How many different rectangular prisms can he build if he uses all of the cubes.

    asked on March 19, 2013
  58. calculus

    Find the values of x for which each function is continuous. 1.) f(x)= 2x+1/x^2+x-2 2.) f(x)= x if x is less than or =1 = 2x-1 if x>1

    asked on January 27, 2013
  59. physics

    You are explaining to a friend why the crew of the International Space Station feels weightless while orbiting the Earth. Your friend responds that he thought gravity was just a lot weaker up there. Show that it isn’t so by calculating the acceleration

    asked on October 23, 2012
  60. math

    Write the equation of the quadratic function with roots -2 and 4 and a vertex at (1, 9).

    asked on October 23, 2012
  61. AP Physics

    Consider the vectors A = 2.00 i + 7.00 j and B = 3.00 i - 2.00 j. (a) Sketch the vector sum C = A + B and the vector subtraction D = A - B. (b) Find analytical solutions for C and D first in terms of unit vectors and then in terms of polar coordinates,

    asked on August 30, 2012
  62. physics

    A 350g glass beaker contains 500g of water at a temperature of 10.0°C. If 400g of ethyl alcohol at 35°C is subsequently poured into the beaker and the water and alcohol mixture is thoroughly stirred, what is its equilibrium temperature?

    asked on March 22, 2012
  63. PHysics

    The tip of a helicoptor rotor blade can reach speeds of roughly 300 mph (130 m/s). It takes about 30 seconds to get them up to speed and they have a typical radius of 20 feet (6 m). What is the average angular acceleration of the rotor blades as they get

    asked on April 6, 2011
  64. Physics

    A lower block is being pulled to the right across a wooden table and it is 5kg and the block on top of it weighs 2 Kg. The friction between the table and the lower block is reduces the total acceleration to be 1.5 m/s2. Friction keeps the upper block

    asked on February 21, 2011
  65. Trig

    tan 75 (show all work please)

    asked on February 18, 2011
  66. Math

    Solve. 3p-1=5(p-1)-2(7-2p)

    asked on January 17, 2011
  67. geometry

    If AC = 20 centimeters, and BC = 16 centimeters, what does AB equal?

    asked on January 13, 2011
  68. physics

    if a super dense material with a refractive index of 1.76 x10^7 what is the speed of light in this material

    asked on April 14, 2010
  69. Chemistry

    What are the characteristics of a perfect flame for a bunsen burner??

    asked on October 13, 2009
  70. Georgraphy

    Why Is London so Big & Why is is where it is? Is it something to do with the river? London has a very long history and therefore is difficult to describe in such a condensed space. Go here and click on the different links to read about London in the

    asked on January 4, 2007
  71. Food Education

    How is Sodium used in the body? I need to know this for some Food Tech reaserch. Thanks. Thank you for using the Jiskha Homework Help Forum. The body uses sodium to regulate blood pressure and blood volume. Sodium is also critical for the functioning of

    asked on November 19, 2006
  72. Math

    A six sided die is rolled once what is the probability that the number rolled down is even number greater than two

    asked on February 27, 2020
  73. geography

    MULTIPLE CHOICE QUESTION Which of the following would NOT be expected to occur as a result of "smart" development versus sprawl? Decreased household costs Increased land consumption Fewer vehicle miles traveled per household Decreased respiratory

    asked on December 12, 2019
  74. math

    A fireplace arch is to be constructed in the form of a semiellipse. The opening is to have a height of 3 feet at the center and a width of 8 feet along the base. The contractor cuts a string of a certain length and nails each end of the string along the

    asked on October 21, 2019
  75. History

    What impact did the Columbian exchange have on the imperialism?

    asked on July 3, 2019
  76. Calculus: Differentiation

    I am having trouble solving these. Could you explain how to do these 3 questions, step by step? That would be helpful! 1. Differentiate y=sin ^-1 (x^2) at x=0.5 . Round to 3 decimal points. 3. Differentiate y= (x^2 +1) tan ^-1 (x) at x=1 7. Differentiate

    asked on December 6, 2018
  77. Calculus

    1. Using midpoint method, estimate the area under the graph of y= sqrt x between x = 0 to x = 1, using 4 rectangles. 3. A soccer ball is kicked straight up into the air from the ground with an initial velocity of 200 ft/s. The velocity of the ball at any

    asked on November 2, 2018
  78. calc

    Find the normal equation to the curve LaTeX: xy\:+\:2x\:-\:y\:=\:0xy+2x−y=0 that are parallel to the line -4x - 2y = 10.

    asked on October 11, 2018
  79. physics

    1.) If the penny is at a radius of 6.00 cm spinning at a speed of 3.50 rad/sec. What is the centripetal acceleration of the penny in m/s2? Enter your answer to three significant figures.

    asked on October 8, 2018
  80. Calc

    1.) differentiate: y=sin (3x/2) + cos (3 x/2) 6.) If 3x3 - 3y3 = 48, find y" at point x = 2.

    asked on September 30, 2018
  81. Chemistry

    1.) It takes 2.085x10^1 mL of 1.30x10^-1 M NaOH to titrate 2.9660x10^-1 grams of solid monoprotic acid (HX). What is the molar mass of this acid. Express in scientific not. w/ 3 sig figs. Here is my work, but I'm not sure if it's right. Please check.

    asked on June 11, 2018
  82. Chemistry

    Mass of metal=45.00 grams Initial temp= 20.0 degrees Celcius Final temp= 87.0 degrees Celcius 4.184 J/g-specific heat of H2O The metal was heated up from initial temp to final temp. What would be the metal's highest temperature? The specific heat of the

    asked on June 7, 2018
  83. Chemistry

    Quantum numbers arise naturally from the mathematics used to describe the possible states of an electron in an atom. The four quantum numbers, the principal quantum number (n), the angular momentum quantum number (ℓ), the magnetic quantum number (mℓ),

    asked on June 7, 2018
  84. Calc

    The position of an object moving along a line is given by the function s left parenthesis t right parenthesis equals negative 4.9 t squared plus 31 t plus 15. Find the average velocity of the object over the following intervals. ​(a) left bracket 0 comma

    asked on May 25, 2018
  85. geography

    Find the surface area of the cylinder in terms of pie. 14 cm diameter and 18 cm for the height. π = the number pi (3.1416...) r = radius is not the correct way to do this problem any help would be great. answer are 350cm^2 i think this is correct however

    asked on March 30, 2018
  86. Geography

    How do I find the daily rotation of a tire. My tire size diameter is 25 I travel 160 miles per week not sure where to go next

    asked on March 19, 2018
  87. Geometry

    I have to angles and a side how do I do this Angle 1: 90 degrees Angle 2: 63 degrees Side 1: 5 mm I know angles need to add up to 180 so 90 +63=153 180-153=27 so the angle is 27 How do I figure out the sides? I have 5mm to start I am really not sure I

    asked on February 22, 2018
  88. Chemistry

    You have a 2.0 M solution of HNO3. To what volume in mL would you dilute 500.0 mL to achieve a pH of 4.00?

    asked on February 5, 2018
  89. Chemistry

    How many moles of calcium hydroxide are needed to neutralize 250.0 mL of hydrochloric acid with a pH of 6.000?

    asked on February 5, 2018
  90. Math

    3. x(5,-8) Go down 5, left 7, and down 6 more quadrant:_________;point:x(___,____) Plz help

    asked on January 22, 2018
  91. Science

    Margarito's class is running sprints. Each student has to run to a wall 100 yards away, slap it, then run back to the starting line. It takes Margarito 53 seconds to run from the starting line to the wall and back again. What was Margarito's average speed?

    asked on January 10, 2018
  92. math

    it cost 660 dollars to put on the school play. how many tickets must be sold at 6 dollars piece in order to make a profit?

    asked on January 7, 2018
  93. math

    it cost 660 to put on the school play. how many tickets must be sold at 6 piece in order to make a profit?

    asked on January 7, 2018
  94. Math

    Help I need a 4 word problems. Each word problem should have 1 multiplication,1 Division, one addition and one subtraction and we need one variable. PLEASE HELP

    asked on January 4, 2018
  95. Social Studies

    How does physical geography affect the distribution of goods?

    asked on January 2, 2018
  96. Math

    Meredith worked 5 hours on Tuesday and 7 hours on Friday. Her total gross pay for the week was 72 dollars. How much does Meredith earn in 1 hour? a. Write an equation to represent the situation and solve the equation algebraically.

    asked on December 10, 2017
  97. Chemistry

    A 12.0 L sample of hydrogen gas has a pressure of 27.0 atm. What volume would this gas occupy at 3.70 atm? Assume ideal behavior.

    asked on April 17, 2017
  98. stats

    The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping (USA Today, November 11, 2009). Assume that the number of hours a worker spends doing

    asked on March 28, 2017
  99. Language arts

    What does "SCS,F,S,SCV,CD,CX"?

    asked on March 22, 2017
  100. History World

    Were tanks used by the British in World War I? I think to break the stalemate by successfully conquering No Man Land is that correct?

    asked on March 20, 2017


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