Questions Asked on
December 4, 2012

  1. physics

    Water falls from a height of 84 m. Assuming that all the energy is converted into heat, the rise in temperature of water will be (4200 J/(kg °C) and g=10 m/s2)?

    asked by Salem
  2. Physics

    If the coefficient of kinetic friction between a 35 kg crate and the floor is 0.30, what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if μk is zero?

    asked by Henry
  3. Economics

    PROBLEM SOLVING 1: "ANDREA'S SOFTWARE BUSINESS" I. Complete the following table: DO THE MATH Data Number of Programs Total Fixed Costs Total Variable Costs Total Costs Marginal Costs Average Fixed Costs Average Variable Costs Average Total Costs 0 $60 $0

    asked by Timithy
  4. Math

    Peter has 1200 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area?

    asked by Jane
  5. math

    One pipe fills a storage pool in 20 hours. A second pipe fills the same pool in 15 hours. when a third pipe is added and all three are used to fill the pool , it takes only 6 hours. Find how long it takes the third pipe todo the job.

    asked by sam
  6. PHYSICS - PLEASE HELP

    Converting sunlight to electricity with solar cells has an efficiency of 15%. It's possible to achieve a higher efficiency (though currently at higher cost) by using concentrated sunlight as the hot reservoir of a heat engine. Each dish in the figure

    asked by Anonymous
  7. Chemistry 2

    How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NICl2 for 60.0 minutes. Show all work. Please help!

    asked by Ashley
  8. maths --plse help me..

    if tangent to the curve y=2sinx +sin2x are drawn at p(x=60degree) then find the area of the quadrilateral formed by the tangent the normal at P and the coordinate axis

    asked by Anamika
  9. math

    In 6 hours,an experienced cook prepares enough pies to supply a local restaurant's daily order. Another cook prepares the same number of pies in 7 hours. Together with a third cook, they prepare the pies in 2 hours. Find how long it takes the third cook to

    asked by sam
  10. Chemistry - Lewis Dots

    Draw the molecule by placing atoms on the grid and connecting them with bonds. Do not identify the charge on each of these species. Include all lone pairs of electrons. H3COCH3 Draw the ion by placing atoms on the grid and connecting them with bonds. Do

    asked by Amy
  11. Problem Solving: Writing to Explain

    Look at the numbers 13, 15, 19, 25,.... Describe the pattern and how can you find the next tow numbers.

    asked by Vershawn
  12. chemistry

    A magic number is the name given to certain numbers of protons or neutrons that have a high correlation to stability in nuclei. Magic # of protons: 2,8,20,28,50,82 Magic # of neutrons: 2,8,20,38,50,82,126, 184 Using general trends, predict the stability of

    asked by michelle
  13. Physics

    An elevator lifts a total mass of 1.1 x 10^3 kg, a distance of 40 m in 12.5s. How much power does the elevator demonstrate?

    asked by Taylor
  14. math

    In 2 minutes, a conveyor belt moves 300 pounds of recyclable aluminum from the delivery truck to a storage area. A smaller belt moves the same quantity of cans the same distance in 6 minutes. If both belts are used, find how long it takes to move the cans

    asked by David
  15. Physics

    A 46% efficient device uses chemical energy to generate 570J of electric energy. 1. How much chemical energy is used? 2. A second device uses twice as much energy to generate half as much electric energy. What is its efficiency?

    asked by Anonymous
  16. chemistry

    How do I determine the mass (in g) of a sucrose solution that contains 12g of sucrose and is 4.1% sucrose by mass?

    asked by What?
  17. chemistry

    How do I calculate the freezing point of 11.3g FeCl3 in 155g water? I know how to calculate i and m but how do you find Kf?

    asked by Farah Massardi
  18. Math

    Diana has 520 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum area?

    asked by Cathy
  19. Physics

    A radio station uses broadcasting at 600 kHz. What is the wavelength of the signals emitted by the station (speed of light c=3×108 m/s)

    asked by Salem
  20. Chemistry Lab

    I need help with the third part The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please

    asked by Terry
  21. Physics

    Dry ice is frozen carbon dioxide. If you have 1.4kg of dry ice, what volume will it occupy if you heat it enough to turn it into a gas at a temperature of 20 degrees Celsius? (answer is in m^3)

    asked by Anonymous
  22. social studies

    Which of the following is not a response to the Stamp Act?

    asked by kid
  23. Chemistry

    The normal boiling point of bromine (Br2) is 58.8°C, and its molar enthalpy of vaporization is ΔHvap = 29.6 kJ/mol. Calculate the value of ΔS when 1.00 mol of Br2(l) is vaporized at 58.8°C.?

    asked by Josh G.
  24. chemistry

    For a particular redox reaction NO is oxidized to NO3^– and Cu^2+ is reduced to Cu. Complete and balance the equation for this reaction in basic solution: NO + Cu^2+ --> NO3^- + Cu^+ help. thanks.

    asked by dr. bob rocks
  25. Physics

    21) A 46 kg skater is standing still in front of a wall. By pushing against the wall she propels herself backward with a velocity of – 1.2 m /s. Her hands are in contact with the wall for 0.8 s. Ignore friction and wind resistance • Find the magnitude

    asked by Bill
  26. Chemistry 3A

    a 325ml sample of air is at 720 torr and 30.0 degrees Celsius. what volume will this gas occupy at 800 torr and 75.0 degrees Celsius.

    asked by Gurjot
  27. trigonometry

    how do i simplify (secx - cosx) / sinx? i tried splitting the numerator up so that i had (secx / sinx) - (cosx / sinx) and then i changed sec x to 1/ cosx so that i had ((1/cosx)/ sinx) - (cos x / sinx) after that i get stuck

    asked by v
  28. Math could you help this is kinda hard and urgent

    The diagonals of a trapezoid are perpendicular and have lengths 8 and 10. Find the length of the median of the trapezoid. I tried figuring this out... by the way i got median times height is 40 and also notice that we are talking about the diagonals not

    asked by Knights
  29. chemistry

    for the reaction 3C2H2=> C6H6 at 25 C, the standard enthalpy change is -631 KJ and the standard entropy change is -430 J/K. calculate the standard free energy change at 25 C. show all work!

    asked by ashley
  30. PLEASE HELP geometry trapezoid problem please help

    The diagonals of a trapezoid are perpendicular and have lengths 8 and 10. Find the length of the median of the trapezoid. I don't get it... i got as far as the area is 40, and m (median) times the height is 40 as well... please help!

    asked by Knights
  31. accounting

    a firm expects to sell 25000 units of its products at $11.00 p/unit. pretax income is predicted to be $60,000. if the variable cost p/unit are $5.00, total fixed cost must be?

    asked by manuel
  32. maths

    Find a30 -a20 for the AP a, a+d, a+2d, a+3d........

    asked by Meenakshi
  33. chemistry

    what is the most soluble salt of the following set? a) AgCN with Ksp=6.0 x 10^-17 b) Al(OH)3 with Ksp = 1.9x10^-33 c) Fe(OH)3 with Ksp = 2.6 x 10^-39 d) Sn(OH)2 with Ksp = 1.6 x 10^-19

    asked by ashley
  34. Chemistry

    How do I solve the following: 500ml .4M aluminum nitrate solution contains ______moles of aluminum ions and _______moles of nitrate ions. I am helping my fiance and we don't know how to calculate this.

    asked by Abram
  35. Physics

    What is the ratio of the wavelength of visible light of wavelength600 nm to that of an FM radio wave of frequency 100 MHz? c = 2.998x 108 m/s

    asked by Amy
  36. physicss

    A child sits on a swing supported by ropes of length 3.0 m. With what frequency will she need to apply the driving force to maintain swinging?

    asked by jad
  37. math VERY URGENT

    Mrs. Black has one begonia plant. If she buys two begonia plants each year for every one she has, how many will she have in four years? Please explain the answer.

    asked by Anonymous
  38. Chemistry 3A

    A volume of 122mL of argon, Ar, is collected at 50 degrees Celsius and 758 torr. What does this sample weigh?

    asked by Gurjot
  39. math

    An airplane flew 1500 miles in 2.5 hours. How many kilometers is this per hour

    asked by mike
  40. Chemistry 3A

    in a lab experiment, 133mL of gas was collected over water at 24 degrees Celsius and 742 torr. Calculate the volume that the dry gas would occupy at STP.

    asked by Gurjot
  41. math

    graph the inequality... y > –5x + 3 I need help to know how to graph this - unsure how and I have to choose between 4 graphs that are shaded....

    asked by Deborah
  42. Physic

    A box with a weight of 22N falls through the air with a wind resistance of 14N, what is the mass of the box and the acceleration of the box?

    asked by Mac
  43. math

    The quotient of a number and 3, minus 1, equals 5/3. Find the number.

    asked by sam
  44. Math

    a merry-go-round has a radius of 20 ft has a duration per ride of 15 revolutions. How far does a person travel who rides on the merry-go-round? (use 3.14 for pi)

    asked by Mitchell
  45. Math

    Emma receives $7750 and invests it in an account that earns 4% interest compounded continuously. What is the total amount of her investment after 5 years?

    asked by Student09
  46. math

    A pilot can fly an MD-11 2160 miles with the wind in the same time she can fly 1920 miles against the wind. If the speed of the wind is 30 mph, find the speed of the plane in still air.( Source: Air Transport Association of America)

    asked by val
  47. physics

    A 9.0 m uniform beam is hinged to a vertical wall and held horizontally by a 5.0 m cable attached to the wall 4.0 m above the hinge, as shown below. The metal of the cable has test strength of 1.00 KN (kilo-Newton), which is the maximum tension magnitude T

    asked by toby
  48. Physics

    A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 1.9m/s. What is the initial height of the bob?

    asked by Enno
  49. physics

    A long, straight wire lies on a horizontal table and carries a current of 3.05 µA. In a vacuum, a proton moves parallel to the wire (opposite the current) with a constant speed of 3.00 104 m/s at a distance d above the wire. Ignoring the magnetic field

    asked by Anonymous
  50. Chemistry 3A

    how do i calculate the density of sulfur dioxide, SO2, at STP.

    asked by Gurjot
  51. Physics

    A force of 310 N is applied horizontally to a crate in order to displace the crate 45.0 m across a level floor at a constant velocity. As a result of this work, the crate's internal energy is increased by an amount equal to 12 percent of the crate's

    asked by Casey
  52. Social Studies

    What percentage of the world's earthquakes and active volcanoes occur on the "Ring of Fire"? 1) *10% 2) *20% 3) *50% 4) *80% My Answer. Is It Correct? Please Be Honest. #4: 80% The name of Earth's single, huge continent from over 250 million years ago is

    asked by !!!!Please Answer Ms.Sue The Real One!!!!
  53. Physics

    A race car travels 110 m/s around a circular track of radius 197 m. The track is banked at 22 degrees from the horizontal with a friction constant of 0.14. What is the magnitude of the resultant force on the 2800 kg driver and his car of the car does not

    asked by Tim
  54. social studies

    Despite temperatures of more than 5,000º F, Earth's inner core is solid because of _____________________. a layer of ice just above it. the fact that Earth rotates so quickly. a thickness of over 1,000 miles. great pressure from the layers around it.

    asked by Sammy, !!!Please Answer!!
  55. Physics

    An elevator and its load have a combined mass of 1550 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 11 m/s, is brought to rest with constant acceleration in a distance of 38 m.

    asked by Trent
  56. Chemistry 3A

    a quantity of oxygen occupies a volume of 19.2L at STP. How many moles of oxygen are present?

    asked by Gurjot
  57. Physics

    A force of 40 N is required to start a 5 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? (b) If the 40 N force continues, the box accelerates at 0.70 m/s2. What is the

    asked by Harry
  58. accounting

    management anticipates fixed cost of $72,500 and variable cost equal to 40% of sales. what will pretax income equal if sales are $325,000?

    asked by manuel
  59. math

    an observer in a lighthouse 300 ft above sea level observes 2 ships directly offshore. The angles of depression to the ships are 3 degrees and 4.5 degrees. How far apart are the two ships?

    asked by Anonymous
  60. math

    A jet plane traveling at 500 mph overtakes a propeller plane traveling at 200 mph that had a 2-hour head start. How far from the starting point are the plains?

    asked by justin
  61. Geometry

    if EF = 2x + 7 and GH = 5x + 1, What is EF?

    asked by Anonymous
  62. Chemistry 3A

    the pressure of hydrogen gas in a constant volume cylinder is 4.25atm at 0 degrees celsius. what will the pressure be if the temp. is raised to 80 degress celsius? Also do we have to first convert celsius to kelvin?

    asked by Gurjot
  63. physics

    A small child has a wagon with a mass f 10 kilograms (KG). The child pulls on the wagon with a force of 2 newtons (N). What is the acceleration of the wagon?

    asked by Bri
  64. Chemistry 3A

    a sample of gas occupies 500ml at STP. what volume will the gas occupy at 85.0 degrees Celsius

    asked by Gurjot
  65. Math

    A car dealer will sell you the $16,650 car of your dreams for $3,290 down and payments of $331.97 per month for 48 months. What is the APR? (Round your answer to the nearest tenth of a percent.)

    asked by Kim
  66. Algbra

    A car dealer will sell you the $16,650 car of your dreams for $3,290 down and payments of $331.97 per month for 48 months. What is the APR? (Round your answer to the nearest tenth of a percent.) I keep getting the wrong answer. I get 26.1

    asked by Sarah
  67. maths-probability

    A person writes letter to 6 friends and addresses the corresponding envelopes. In how many ways the letter be placed in envelops so that--- (i) Atleast 2 of them are in wrong envelop (ii) All the letters are in wrong envelop

    asked by suheil
  68. PHYSICS - PLEASE HELP!!

    An "energy bar" contains 19g of carbohydrates. If the energy bar was his only fuel, how far could a 68kg person walk at 5km/hr ?

    asked by Anonymous
  69. physics

    A uniform rod of length b stands vertically upright on a rough floor and then tips over. What is the rod's angular velocity when it hits the floor?

    asked by tanti
  70. physics

    A 2.40 kg block is in equilibrium on an incline of 36.3 degrees. The acceleration of gravity is 9.81 m/s2 . What is Fn of the incline on the block? Answer in units of N

    asked by Anonymous
  71. Physics URGENT!!!

    A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 59 dB by an observer 14 km away. (a) What (b) What intensity level of the horns sound is observed by someone waiting at an intersection 46 m from the train?

    asked by Tia
  72. A train sounds its horn as it approaches an inters

    A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 53 dB by an observer 11 km away. (a) What is the average power generated by the horn?

    asked by Anonymous
  73. math

    Three times the reciprocal of a number equals 9 times the reciprocal of 6. Find the number.

    asked by David
  74. Chemistry - Photons

    Water is exposed to infrared radiation of wavelength 2.5×10−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.5 g of water by 2.5 K? -------------------------- I tried

    asked by Amy
  75. math

    a scale model of a car is 10 in long. The actual car is 15 ft long. What is the scale of the model?

    asked by boy
  76. math

    Find the numerator for the equivalent fraction. 4/9 = ? / 63

    asked by Anonymous
  77. science

    Which example describes a method of relative dating? A. using fossils to determine the oldest rock layer in a canyon B. using radioactive isotopes to calculate the age of a rock C. measuring the depth of tree bark D. examining historical records to

    asked by dominique
  78. 7th grade math Ms. Sue please

    Sometimes people say, "Give 110% of your effort." Isit possible to get 110%? Is there ever a situation where you might have a percent over 110%? If no, explain why. If yes, Give a scenario where 110% is used. Please help Ms. sue! I have NO IDEA how to

    asked by Delilah
  79. Physics

    A car of mass 1200kg starts from rest, accelerates uniformly to a speed of 4.0 meters per second in 2.0 seconds and continues moving at this constant speed in a horizontal straight line for an additional 10 seconds. the brakes are then applied and the car

    asked by Ken
  80. Chem Lab Help

    I wanted to know if any one has done the Determination of ASA Content of Tablets Lab Report. I need help doing the post lab questions

    asked by Latica
  81. Math

    Given θ = arcsin (tan45°) find the exact degree measure of θ without usiing calculator.

    asked by TRIGONOMETRY
  82. Math

    Find the amount of interest and the monthly payment for the loan. Purchase a living room set for $3,600 at 12% add-on interest for 2 years. (Round your monthly payment to the nearest cent.) $_____ interest $_____ per month

    asked by Ms Jackie
  83. English

    For english class, I have to read a biography/autobiography of an author and then read two of the author's books that have been influenced by their real life. I chose F. Scott Fitzgerald as my author. I want to read The Great Gatsby as one of the books,

    asked by Ceci
  84. math

    A pilot can travel 400 miles with the wind in the same amount of time as 336 miles against the wind. Find the speed of the wind if the pilot's speed in still air is 230 miles per hour.

    asked by justin
  85. physics

    show that none of the principal moments of inertia can exceed the sum of the other two Please help me thank you

    asked by rhea
  86. science

    the frequency of a source is 20KHz. THE FREQUENCIES OF SOUND WAVE PRODUCED BY IT IN WATER AND AIR WILL BE.

    asked by sita
  87. physics

    A bathysphere used for deep sea exploration has a radius of 1.60 m and a mass of 1.20 104 kg. In order to dive, the sphere takes on mass in the form of sea water. Determine the mass the bathysphere must take on so that it can descend at a constant speed of

    asked by sjust
  88. physics

    A thin, light horizontal string is wrapped around the rim of a 4.00-kg solid uniform disk that is 30.0 cm in diameter. A box is connected to the right end of the string and moves to the right along the ground horizontally with no friction. The box is

    asked by toby
  89. math

    on 3 tests you earned grades of 88%,94%,and 90%. Each test was worth 150points. The final exam is worth 250 points. How many points do u need on the final exam to earn 93% of the total points on tests? What percent do you need on the final?

    asked by Brandon
  90. maths

    A Toy is in the form of a hemisphere surmounted by a right circular cone of the same base radius as that of the hemisphere .If the radius of base of the cone is 21 cm and its volume is 2/3 of the volume of hemisphere calculate the height of cine and

    asked by simran
  91. english

    What grammatical structure is the italicized portion of the sentence? Although her personality had not changed at all, Megan looked quite different. First part is italicized!

    asked by RayRay
  92. Chemistry105

    1. (a) What is the molarity of a solution prepared by dissolving 4.315 g of NaOH in water to exactly 100 mL in a graduated flask? (Na = 23.0; O = 16.0' H = 1.0 amu). (b) What volume of the above solution is required to neutralize exactly 25.00 mL of 0.1500

    asked by Mira
  93. UG-LEGON

    EXPLAIN WHY NA2CO3 AGAINST HCL TITRATION USING PHENOLPHTHALEIN INDICATOR DOES NOT UNDERGO COMPLETION BUT STOPS AT NAHCO3 STAGE

    asked by AMPOFO
  94. PHYSICS URGENT! PLEASE FRICTION CASE 2

    A 13 kg box is at rest on a level floor. The coefficient of static friction µS = 0.9 and the coefficient of kinetic friction µK = 0.8. Audrey is applying a 140 N push at an angle (=20°) as shown in Figure 1. C) What is the magnitude of FNormal on box

    asked by Sophia
  95. Chemistry 3A

    A 425mL volume of hydrogen chloride gas, HCL, is collected at 25 degrees Celsius and 720 torr. what volume will it occupy?

    asked by Gurjot
  96. pcc

    Explain which of the following aqueous solutions has the strongest ion-dipole attractions: 0.3 M FeBr3, 0.6 M CaCl2, 0.5 M Ba(NO3)2, 0.2 M (NH4)2SO4, 0.9 M KOH.

    asked by Amsterdam
  97. algebra

    a large group of students want to go to the movies. if the students take 3 vans and 1 car they can transport 22 people. if they take 2 vans and 4 cars. they can transport 28 people.write and solve a system of equations to find the number of people that can

    asked by kayla
  98. math

    Consider G. Thumb, the leading salesperson for the Moe D. Lawn Landscaping Company. Thumb turned in the following summary of clients contacted for the week of October 23–28. Date No. of Clients Oct. 23 11 Oct. 24 8 Oct. 25 11 Oct. 26 15 Oct. 27 11 Oct.

    asked by Debin
  99. Physics HW, Please Help

    A seasoned mini golfer is trying to make par on a tricky hole #5. The golfer can complete the hole by hitting the ball from the flat section it lays on, up a 45° ramp launching the ball into the hole which is d = 1.60 m away from the end of the ramp. If

    asked by Michael
  100. algebra-NOW PLEASE

    A boat is traveling in a river with a current that has a speed of 1.5 km/h. In one hour, the boat can travel twice the distance downstream as it can travel upstream. What is the boat's speed in still water?

    asked by Alex
  101. Chemistry

    Under constant pressure, a small basketball pump is filled with helium, He, gas; the helium is then forced out of a small aperture in 2 seconds. The same pump is filled with hydrogen bromide, HBr, gas. Under the same pressure, how long will it take to

    asked by Kitty
  102. chemistry

    what is the nickel ion concentration in a solution prepared by mixing 337ml of 0.430M nickel nitrate with 387ml of 0.251M sodium hydroxide?

    asked by sa
  103. Physics

    A 0.8 m diameter tank is filled with water to a depth of 2.2 m and is open to the atmosphere at the top. The water drains through a 1.0 cm diameter pipe at the bottom; that pipe then joins a 1.5 cm diameter pipe open to the atmosphere, as shown in Fig.

    asked by Drake
  104. chemistry

    What is the molarity of a sulfuric acid solution if 30.00mL of H2SO4 is required to neutralize 0.840g of sodium hydrogen carbonate? H2SO4(aq) + NaHCO3(aq) → Na2SO4(aq) + H2O(l)+ CO 2(aq)

    asked by shane
  105. math

    Which ordered pair is a solution of the inequality? y ¡Ý 4x ¨C 5 A(3, 4) B(2, 1) C(3, 0) D(1, 1) I think it is C?

    asked by Deborah
  106. Chemistry

    Why does I2 have a higher boiling point than F2? And why does NH3 have a higher boiling point than PH3?

    asked by Jeremy
  107. Physics

    A 155 N force is applied to the end of a 40 cm wrench at a angle of 45 degrees to the handle. What is the torque?

    asked by Kayla
  108. accounting

    a product sells for $200.00 p/unit and its variable cost p/unit are $130 the fixed cost are $420,000. if the firm wants to earn $35,000 pretax income, how many units must be sold?

    asked by manuel
  109. Physics

    A physics student wants to build a spring gun that when aimed horizontally will give a 35.0- g ball an initial acceleration of 'g' by releasing a spring that has been compressed 18.0 cm. What is the velocity of the ball as it emerges from the gun?

    asked by Courtney
  110. Science

    A car traveled at an average speed of 60 mph for two hours. How far did it travel? A. 30 miles B. 60 miles C. 120 miles D. 150 miles

    asked by Layla
  111. Calculus

    A trough is triangular in cross section, an isosceles triangle with sides of 12 inches, and a top of 10 inches. The trough is 40 inches long. How fast is the depth changing if you are pumping one cubic foot per minute into the trough? I am having a hard

    asked by Reggie
  112. calculus

    INTEGRATION BY PARTS... 1) e^5t sin 3t dt 2) xe^3x dx 3) x sec^2 x dx **anybody can help me for this question?

    asked by kchik
  113. math

    What is the range of this data? 17,23,5,13,12

    asked by Anonymous
  114. Algbra

    Marsha must have surgery and she does not have the $2,700 cash necessary for the operation. Talking to an administrator at the hospital, she finds that it will accept MasterCard, VISA, and Discover credit cards. All of these credit cards have an APR of

    asked by Sarah
  115. Math

    Jordan starts at his home and bikes along a country road. He bikes at a constant speed. Twenty minutes later he passes Stephanie's house; he knows he is 2 kilometers away from his home. Another one of his friends, Jacob lives 4 kilometers further down the

    asked by Jessica
  116. math-urgent

    Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:

    asked by sandy
  117. precalculus

    A pilot flies in a straight path for 2 h 30 min. She then makes a course correction, heading 7 degrees to the right of her original course, and flies 3h in the new direction. If she maintains a constant speed of 695 mi/h, how far is she from her starting

    asked by amaa
  118. Math

    Consider the following test scores obtained by a class. Test score 90 80 70 60 50 Frequency 1 4 11 6 2 Find the standard deviation (rounded to the nearest hundredth). -------------------------------- I've posted this question earlier and I'm still getting

    asked by Debin
  119. Chemistry

    7.40 g of liquid methanol, CH3OH, are placed in an empty 20.0 L container at 45.0°C. What will be the pressure in the container when equilibrium is established? Assume the temperature remains constant and the volume of any liquid is negligible. The vapor

    asked by Mark
  120. algebra

    Completely factor the following expressions. Please show work/explain t^2+4tv+4v2 4x^2-8x-12+6x 144-9p^2 5c^2-24cd-5d^2 w^2-17w+42 256z^2-4-192z^2+3 2a^2c^3-14bc^3+32c^3d^2 35g^2+6g-9 3j^3-51j^2+210j

    asked by Amanda
  121. Math

    I'm doing a bunch of practice finals and I don't know how to approach this problem. Find a vector a such that a is orthogonal to < 1, 5, 2 > and has length equal to 6. If I want to find a vector that is orthogonal to , I must take the cross product?

    asked by A.
  122. Physics- Please Help, soooo lost!

    Two pipes of equal length are each open at one end. Each has a fundamental frequency of 715 Hz at 300 K. In one pipe the air temperature is increased to 313 K. If the two pipes are sounded together, what beat frequency results?

    asked by Mary
  123. Math

    What is the slope of the line y = 2x + 1 ?

    asked by Jaslene
  124. Algebra

    Write a linear equation to model the situation. You borrow $70 from your brother. To repay the loan, you pay $7 per week.

    asked by Ann
  125. 5th grade Math

    Jessica and her moter return from shopping with 14 pckages. THey park the car in the parking lot, which is 120 meters away from their house. Then they make several trips to bring the packages into their house. Jessica's mother can carry 3 packages at a

    asked by Anonymous
  126. english

    What grammatical structure is the italicized portion of the sentence? Although her personality had not changed at all, Megan looked quite different.

    asked by RayRay
  127. Math (trigonometric identities)

    I was given 21 questions for homework and I can't get the last few no matter how hard and how many times I try. 17. Sinx-1/sinx+1 = -cos^2x/(sinx+1)^2 18. Sin^4x + 2sin^2xcos^2x + cos^4x = 1 19. 4/cos^2x - 5 = 4tan^2x - 1 20. Cosx - sinx - cos^3x/Cosx =

    asked by Kim
  128. physics

    A 5kg mass was lifted 365cm, how much work was done against gravity?

    asked by Jennifer
  129. maths --Surface area and all that..

    A toy is in the shape of a right circular cylinder with hemisphere on one end and a cone on the other . The height and radius of the cylindrical part are 13 cm and 5 cm respectively. The radius of the hemispherical and conical parts are the same as that of

    asked by manraj
  130. Chemistry

    Given the following equation: 2CH3CO2H + Ca(OH)2 --> Ca(CH3CO2)2 +H2O If you start with 30 ml of a 5% solution of acetic acid, how much of a .1M Ca(OH)2 solution would it take to completely neutralize the acid? I'm not quite sure how to start? Should I

    asked by Christie
  131. physics

    A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 53 dB by an observer 11 km away. (a) What is the average power generated by the horn?

    asked by Anonymous
  132. grammar

    Franklin Roosevelt said that December 7, 1941, was "A date which will live in infamy."

    asked by Earl
  133. Pre-Calc

    A box is formed by cutting squares out of the corners of a flat piece of metal, and folding the sides up. What size cuts should I make to a 14in. by 20in. piece to get a volume of 270in cubed?

    asked by YKWCH
  134. Social Studies

    what is one freedom that American democracy has today that was clearly not recognized in the Roman Empire

    asked by Dalton
  135. Science

    How can I compare the terms rotation and revolution by creating a Venn diagram? How does the diagram look like?

    asked by Louise
  136. correlation and regression

    the data given below has y = 3x-5 for its regression equation. find the standard error of estimate

    asked by reta
  137. Chemistry 3A

    what volume would 10.5 g of nitrogen gas, N2, occupy at 200 K and 2.02 atm?

    asked by Gurjot
  138. chemistry

    which of the structures are impossible ,give the numbers of bonds that various atoms can form? (a)CH3CH3 CH3 (b)CH3CH=CH2CH2CH3 (c)CH3NHCH3 (d)CH3CCl=CCH2CH3 (e)(CH3)3 CHCH(CH3)2 (f)CH3CHO

    asked by anie
  139. English

    Hello all. I speak very little of english. My teacher emailed me this and I wan't to make sure I understand correctly. [The final exam will only cover material since the midterm.] this means that final exam will ONLY cover what we learned after midterm??

    asked by Shabihi
  140. math

    Supppose two trains leave Holbrook, Arizona, at the same time, traveling in opposite directions. One train travels 10 mph faster than the other. In 3.5 hours, the trains are 322 miles apart. Find the speed of each train.

    asked by justin
  141. Math

    Consider the following test scores obtained by a class. Test score 90 80 70 60 50 Frequency 1 4 11 6 2 Find the standard deviation (rounded to the nearest hundredth).

    asked by Debin
  142. math

    Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:

    asked by sandy
  143. Physics

    A plant hangs from a 1.9 cm diameter suction cup affixed to a smooth horizontal surface (there's a figure but it's pretty simple, a plant in a plant pot hanging from a couple wires, but what seems to matter is the suction cup part). (a) What is the maximum

    asked by Brian
  144. chemistry

    Which of the changes will form more CaCO3 (more moles CaCO3)? CO2 + Ca(OH)2=CaCO3 +H2O delta H =-113kJ Write and explain if amount CaCO3 decrease, no change or increase with regards to the following situations: a) Increase volume at constant temperature.

    asked by Akira 8
  145. Basic Engineering2. Materials Science

    Boron is used to dope 1 kg of germanium (Ge). How much boron (B) is required to establish a charge carrier density of 3.091e7/cm^3. One mole of germanium has a volume of 13.57 cm^3 and weighs 72.61 gram. Give answer in grams of boron? I have no idea how to

    asked by Ray
  146. physics

    A coal-fired electrical generating plant has an efficiency of 38%. The temperature of the steam leaving the boiler is 550 °C. What percentage of the maximum possible efficiency does this plant obtain? (Assume the temperature of the environment is 20 °C)

    asked by Salem
  147. social studies

    what is the question to usa studies weekly 9

    asked by katie
  148. Programming

    Create a program that determine the shipping cost for an order based on the following table: From $0.00 $20.00 $50.00 $75.00 To $19.99 $49.99 $79.99 $1000.00 Price $2.95 $3.95 $4.95 Free

    asked by Anonymous
  149. Chemistry

    Is the bond in the molecular orbital energy level diagram of Li2 stable?

    asked by Jeremy
  150. English - ms. sue

    ms. sue i want to be clear on two more questions. about this man sitting on the step with suitcase, that be because he be leaving somewhere, but i not get why he be mentioned? to escape from bad neighbourhood? also i not get what recrimination mean. to

    asked by Mohammad
  151. physics

    A box slides down a 33.3 ◦ ramp with an acceleration of 1.07 m/s 2 . The acceleration of gravity is 9.8 m/s 2 . Determine the coefficient of kinetic friction

    asked by Anonymous
  152. MATH

    Expand f(x)=ln (1+x/1-x) in a Taylor Series about x=0. You must express your answer using summation notation. ---This is what I tried to do--- So I was thinking of taking the derivative of ln(1+x/1-x) and get 2/x^2-1 And then use the identity 1/1-x= sum

    asked by A.
  153. math-urgent please help

    Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:

    asked by barry
  154. Physics

    A 10 ohm resistor and a 20 ohm resistor are connected in parallel. What is the equivalent resistance of this setup?

    asked by Anonymous
  155. Calculus

    When an electronics store prices a certain brand of stereos at p hundred dollars per set, it is found that q sets will be sold each month, where q2 + 2 p2 = 41. a. Find the elasticity of demand for the stereos using implicit differentiation. b. For a unit

    asked by jacob
  156. Physics Please Help me!

    The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is

    asked by Sarah
  157. maths

    A villager Itwaari has a plot of land of the shape of a quadrilateral. The Gram Panchayat of the village decided to take over some portion of his plot from one of the corners to construct a Health Centre. Itwaari agrees to the above proposal with the

    asked by manpreet
  158. Physics - Unit Conversion

    I am trying to calculate heat transfer between two objects. The units are as follows: mass: grams specific heat: cal/gm degree celsius temperature: degree celcius My numbers aren't working out and I know how to do the problem. So, what's the deal with the

    asked by Brenda
  159. maths --plse help me..

    A toy is in the shape of a right circular cylinder with hemisphere on one end and a cone on the other . The height and radius of the cylindrical part are 13 cm and 5 cm respectively. The radius of the hemispherical and conical parts are the same as that of

    asked by sarika
  160. Programming Languages (Computer Logic and Design)

    Create a program that determine the shipping cost for an order based on the following table: From $0.00 $20.00 $50.00 $75.00 To $19.99 $49.99 $79.99 $1000.00 Price $2.95 $3.95 $4.95 Free

    asked by Anonymous
  161. calculus

    find an equation for the line with the given properties. express the equation in slope-intercept form. containing the pointsP=(-1,1)& Q= (1,-2) What is the equation of the line? y= Find the the equation of a line that is perpendicular to the line y=1/2x+4

    asked by spazed out
  162. math

    funtion table input output 1 1 2 2 3 4 4 9 5 25 6 7 8 9

    asked by dn
  163. Physics

    A rock dropped into a pond produces a wave that takes 14.6 s to reach the opposite shore,21.1 m away. The distance between consecutive crests of the wave is 5.3 m. What is the frequency of the wave?

    asked by Priscilla
  164. English

    Read the sentences Then rewrite each possessive noun correcting its use of the apostrophe Moms' purse is on the hall table Mom's The witnesses's testimony convicted him witnesses' The original solo designers' plans are the best designer's? Two womens'

    asked by Jerald
  165. Physics

    A person exerts a force of 12.0 N on the end of a door 65.0 cm wide. What is the magnitude of the torque (in newton-meters) if the force is exerted perpendicularly to the door?

    asked by Tori
  166. math

    Currently, the Toyota Corolla is the best selling car in the world. Suppose that during a test drive of two Corollas, one car travels 224 miles in the same time that the second car travels 175 miles. If the speed of the firstvcar is 14 miles per hour

    asked by val
  167. Calculus

    Consider a manufacturer whose total cost of producing x items is given by c(x)=10000+5x+1/9x^2. a. What is the average cost function A(x)= c(x)/x? b. How many items should the manufacturer produce in order to minimize average cost? c. What is the smallest

    asked by joshua
  168. trigonmetry

    find all solutions for tan^2 theta -4 = 0 i got theta = arctan 2 is that correct? and if it is how would i write it as a solution?

    asked by v
  169. physics

    Your friend says his remote control car travels at a velocity of 1.5 m/s. What is wrong with that statement

    asked by jai
  170. Physics

    A 4 ohm resistor and 10 ohm resistor are connected in series. If this circuit is connected to a 12 V battery, how much current will flow through the circuit?

    asked by Bill
  171. math

    Suppose that you must order concrete for a sidewalk that is to be 58 ft by 3 ft to a depth of 6 in. How much concrete is required? (Answer to the nearest 1/2 cubic yard.) my answe is 11.5 and is wrong.ugh

    asked by Debin
  172. HSM/220 - HUMAN SERVICES ADMIN: SO YOU WANT TO HEL

    in 200 to 300 words, the advantages and disadvantages of each of the following organizational structures: · Departmentalization · Matrix organizations · The project team · The collegial model

    asked by domanique
  173. French

    Qu'est-ce que tu utilises quand il fait chaud? Qu'est-ce que tu n'utilises pas si tu as froid? Quand il fait froid, qu'est-ce qu'il y a sur ton lit? Où sont tes livres? Où sont tes vêtements? Qu'est-ce qu'il y a sur les fenêtres? Où est-ce que tu te

    asked by Roscoe
  174. Math

    The difference between my digits is 7. When you divide me by the sum of my digits, the quotient is the sum of my digits. That makes me a perfect you know what! Which number am I?

    asked by Joshua
  175. Math

    What does the line y = -3x - 3 look like? horizontal vertical slanted right upwards slanted right downwards

    asked by Estella
  176. math

    Currently, the Toyota Corolla is the best selling car in the world. Suppose that during a test drive of two Corollas, one car travels 224 miles in the same time that the second car travels 175 miles. If the speed of the first car is 14 miles per hour

    asked by val
  177. English

    Read each phrase. On the line rewrite the phrase to correct the mistake. Use correct;y a possessive indefinite pronoun or a possessive personal pronoun everyones' share in the prize everyone's my's role in the winnings my each ones part in the success

    asked by Jerald
  178. english

    Is the following question correct It took a lot of planning, time, and energy to lay the track for the trans-continental railroad.

    asked by mom
  179. math

    Suppose a 60,000 martgage is to be amortized at 7.5% interest. Find the total amount of interest that would be paid for each term a) 10 years b) 30 years

    asked by Andrzej
  180. chemistry

    For the hydrogen atom where Rh=2.18*10^-18 J, the wavelength of the transition from the ground state to the n=3 state is_____?

    asked by chironjit
  181. maths

    E is the mid-point of median AD of the triangle ABC and BE is produced to meet AC at F. Show that AF = 1 1/2 AC

    asked by manpreet
  182. Science

    In one or two sentences, summarize what happens during each of the two stages of cellular respiration?

    asked by Anonymous
  183. Physics- PLEASE HELP

    The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is

    asked by Sarah
  184. geometry

    a cylinder is inscribed in a rectangular solid with a base length that is 10 inches and width that is 10 inches and a height of 16 inches. what is the radius of the cylinder?

    asked by miks
  185. TRIGONOMETRY

    Write the following trigonometric expression as an algebraic expression in x free of trigonometric or inverse trigonometric functions sin(cos^-1 x) -1≤x≤1

    asked by Matthew
  186. math

    Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:

    asked by sandy
  187. physics

    A coil spring is extended by 4.4 cm when it supports a 1.00- N weight. If an identical spring is joined to the end of the first one, what is the extension of the combined spring when it supports the same 1.00- N weight? Assume the spring masses to be

    asked by Courtney
  188. Calculus

    Find the parametric equations for the line of intersection of the planes x+y+z=3 and x-y+2z=2 I took the cross product of the 2 equations and got 3i-j-2k I then set z=0 and got x=5/2 and y=1/2. I got: x=5/2 +3t y=1/2-t z=-2t However, the answers are

    asked by Mackenzie
  189. Science

    What object(s) are located between the orbits of Mars and Jupiter

    asked by Navpreet
  190. maths

    there are 8 oranges in a box and 8 kids are waiting to get one. Each kid is given 1 orange, yet there is one orange left in the box, how?

    asked by khan
  191. physics

    A 2.00 kg frictionless block is attached to a horizontal spring as shown. At t = 0, the position x = 0.225 m, and the velocity is 4.25 m/s toward the right in the positive x direction. Position x as a function of t is: x = A*cos(ωt ) , where A is the

    asked by toby
  192. Lit

    Southern Road by Sterling Brown What do you think Sterling Brown means when he mentions the chain gang?

    asked by Emi
  193. Fractions

    What if u have 71/10 and u have to Chang that in to a mixed number

    asked by Joe
  194. math

    you have an unfortunate brush with the law and you are required to spend some time in the penitentiary. (Naturally you have brought your math 30 course notes with you for a bit of light bedtime reading. You also hope to enlighten your fellow inmates with

    asked by barry
  195. Science

    Write a paragraph explaining why a color-blind man who has three daughters and one son with normal color vision might have two grandsons who are color-blind. Use the terms in the vocabulary box in your answer. Underline each term. genotype recessive

    asked by Bobby
  196. math

    On three tests you earned grades of 88%,94% and 90%. Each test was worth 150 points. The final exam is worth 250 pts. How many pts do you need on the final exam to earn 93% of the total points on tests? What percent do you need on the final?

    asked by annonymous
  197. Calculus

    Find the parametric equations for the line of intersection of the planes x+y+z=3 and x-y+2z=2 I took the cross product of the 2 equations and got 3i-j-2k I then set z=0 and got x=5/2 and y=1/2. I got: x=5/2 +3t y=1/2-t z=-2t However, the answers are

    asked by Mackenzie
  198. French

    Qu'est-ce que tu utilises quand il fait chaud? Qu'est-ce que tu n'utilises pas si tu as froid? Quand il fait froid, qu'est-ce qu'il y a sur ton lit? Où sont tes livres? Où sont tes vêtements? Qu'est-ce qu'il y a sur les fenêtres? Où est-ce que tu te

    asked by Roscoe
  199. Math

    I am a perfect square that is 11 more than a perfect square and 13 less than a perfect square. Which number am I?

    asked by Joshua
  200. Biology

    Hi there, Internal membranes play important roles in protein production and processing except they do NOT a. anchor ribosomes in place. b. transport substances. c. contain the hereditary information for the protein. d. modify proteins to go into vesicles.

    asked by Batman
  201. math

    How can i subtract 3/4 by 1/8? Pleae explain answer.

    asked by Anonymous
  202. Trigonometry

    Please check if i did right! 2. Choose the point that lies on the curve r = 2 – 3 sin θ. A. (-5, 3π/2)

    asked by Carlos
  203. Science

    A garden contains 20 different species of plants. Five of these plants are ferns. What percent of the garden is made up of ferns?

    asked by Gio
  204. physics

    A 5.00 kg particle moving along the x-axis at an initial velocity of 4.5 m/s. what is the initial kinetic energy of the particle?

    asked by Anonymous
  205. Chemistry

    The fictitious compound, arrhenium fluoride ( ), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x10-3 M-1s-1. What is the initial rate of reaction in a reactor filled

    asked by lisa
  206. Science

    What objects are located between the orbits of Mars And Jupiter? :I

    asked by Navpreet
  207. Stat

    What particular measure of correlation would be most appropriate for use with two variables measured at an ordinallevel?

    asked by Rolando
  208. calculus

    Plot the points and determine the slope of the line containing them. (-7,-4)(8,-4)

    asked by Heather
  209. calculus

    If (a,-12) is a point on the graph of y=x^2+7x, what is a? please show work

    asked by Heather
  210. chemistry

    When relatively small amounts of magnesium burn, the fires are extinguished using commercially available dry powder. a)Why might this fire rekindle days later as someone tries to remove the residue with water? b)What chemical process is involved here?

    asked by Cameron
  211. Math

    What does the line -4x + 3y = -7 look like? horizontal vertical slanted right upwards slanted right downwards

    asked by Jaslene
  212. English

    Read each phrase. Write the possessive form of each item on the line the barking of the dog the dog's barking the game of my family my family's game the car of my mom my mom's car the office of my aunt my aunt's office the computer of my brother my

    asked by Jerald
  213. ALGBRA

    Consider the following test scores obtained by a class. Test score 90 80 70 60 50 Frequency 1 4 11 6 2 Find the standard deviation (rounded to the nearest hundredth). -------------------------------- I've posted this question earlier and I'm still getting

    asked by Debin
  214. Chemistry

    The fictitious compound, arrhenium fluoride ( ), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x10-3 M-1s-1. What is the initial rate of reaction in a reactor filled

    asked by Help
  215. math

    convert 50 miles per hour in feetvper second(round to the nearest whole.)

    asked by justin
  216. Statistics

    I need to know how to find the probability that z0 is greater than or equal to 2.40 using my TI-83+. The answer is .008200, but I don't know how to get that using my calculator. The only reason I know the answer is because it is an example from my

    asked by Chris
  217. Algebra

    Please show me step by step if possible: Find dimensions of a rectanglar rug whose perimeter is 28 ft and whose area is 45 ft². The length (longer side) equal ___ft and width (shorter side) equal ____ft.

    asked by sandy
  218. math

    You have found a summer job manning a lighthouse off the northern coast of Vancouver Island. It is a lonely job and you feel the need for some mental stimulation. In your position, 40 m above sea level, you observe two sailboats in line with the

    asked by matt
  219. Math

    Danny invested$5,000 into his savings account for college when he was 13 years old. If the account earns 2.5% interest every year, how much interest will danny have earned on his investment and how much money will danny have for college by the time that he

    asked by Mackenna
  220. Alegebra 1

    (1,3) (-3,-5)

    asked by Christian
  221. Physics- Elena please help!

    The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is

    asked by Sarah
  222. statistics

    What is the z-score for a test score of 440 in which the test has a normal distribution of N(400, 50)?

    asked by Angie
  223. maths --plse help me..

    A villager Itwaari has a plot of land of the shape of a quadrilateral. The Gram Panchayat of the village decided to take over some portion of his plot from one of the corners to construct a Health Centre. Itwaari agrees to the above proposal with the

    asked by swati
  224. Physics- PLEASE HELP

    The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is

    asked by Sarah
  225. Science

    Which property can be used to help identify an unknown substance? Specific Heat combustion temperature Tyndall effect

    asked by Cassie:)
  226. Trigonometry

    QUESTIONS IM STUCK ON 6. Change -4√2 - 4√2 to trigonometric form A. 32 cis 135° B. 8 cis 225° C. 8 cis 45° D. 32 cis 45° 7. Simplify (2 cis 100°)7. A. 2 cis 700° B. 128 cis 280° C. 128 cis 340° D. 2 cis 340° 9. Simplify 12(cos52° + i

    asked by Erick
  227. french

    how to make "nous allons en classe pendant le week-end" negative

    asked by R
  228. maths - binomial theorem

    Write and proof binomial theorem for rational indices?

    asked by simmi
  229. Physics

    Continuously running exhaust hoods in a university chemistry building keep the inside air pressure slightly lower than outside. A student notices that a 175 N force is necessary to start opening a 1.2 m by 2.3 m door. The door is hinged on one of its 2.3 m

    asked by Constance
  230. Geometry

    Forest rangers use degree measure to identify directions and locate critical spots such as fires. A forest ranger at tower A observes smoke at a bearing of 149 degrees (clockwise from the north) while another forest ranger at tower B observes the same

    asked by Libby
  231. math

    Refer to the following list of closing costs for purchase of a $ 175,000 house requiring a 20% down payment and find each requested amount. Title insurance premium $ 240 Document recording fee 30 Loan fee ( two points) ….. Appraisal fee 225 Prorated

    asked by Andrzej
  232. math

    A small block of mass 0.8kg is placed at the top of a 4m plane, when it is released, it take 3.5 seconds to slide to the bottom. Determine the coefficient of friction, stating assumptions made.

    asked by Anonymous
  233. Math

    Please show your solution and how you did it. Thank you so much. 1.If x and y are positive numbers such that x^y=y^x and y =2012x, what is x? 2. What powers of two prime numbers will give a product of 1000...000(this sign --> { below the 1000...000 and

    asked by Aliza
  234. university physics

    A cryogenic storage container holds liquid helium, which boils at 4.20 K. Suppose a student painted the outer shell of the container black, turning it into a pseudo-blackbody, and that the shell has an effective area of 0.615 m2 and is at 3.01·102 K. a)

    asked by jane
  235. Organic chemistry

    please help me with these what are the functional group(s) in Lexiva (Fosamprenavir Calcium)? i only know that it has an amine group but i'm not sure if there is another group!!! and how can i relate Lexiva to chemistry?(ideas please)

    asked by leena
  236. math

    The final exam is worth 250 points. How many points do yu need on the exam to earn 93% of the total points ? What percent do yu need on the final?

    asked by annonymous
  237. Plane and Solid Geometry

    A piece of wood whose ends are square was cut from a cylindrical piece of wood which was cut from the same pieces of wood whose ends are squares 10 centimeter by 10 centimeter and length 20 centimeter. Find the volume of wood(smallest volume) with the

    asked by Jannie Lou
  238. math

    •You and three (3) of your friends were in the same advance placement high school chemistry class in high school. All four (4) of you decided to take the same chemistry class together at the local university along with 21 other students. On the first

    asked by jacque
  239. calculus

    find the distance d (P_1 & P_2) between points P_1 and P_1. P_1=(-3,3) P_2=(1,5) Find the midpoint of the line segment joining the points P_1 and P_2. P_1=(1,1) P_2=(-3,3) Please show all work

    asked by spazed out
  240. geomerty HELP PLEASE!

    Using vectors, show that the centroid of a regular pyramid with a rectangular base lies on the altitude to the base and is 4/5 of the altitude's length from the vertex.

    asked by Delia
  241. Marine Park.

    How many liters of Rainbow Juice can be made with 600 milliliters of fruit juice?

    asked by Aaliyah
  242. Science

    Which planet has the strongest winds in the solar system and the Great Dark Spot?

    asked by Navpreet
  243. College Algebra

    Solve the logarithmic equation for x. log(base 3)(x+6) - log(base 3)(x+1)=1 urgent! help!

    asked by Patrick:)
  244. chemisty

    12.00 liters of oxygen gas is under a pressure of 20 mm Hg. If the volume of this gas is decreased to 2.00 liters at constant temperature, what will the new pressure be? I believe this is Boyle's law and the answer should be 120 mm Hg, but according the

    asked by Jo
  245. Science

    Are dwarf planets located in the Kuiper Belt?

    asked by Navpreet
  246. math

    Suppose a 60,000 martgage is to be amortized at 7.5% interest. Find the total amount of interest that would be paid for each term a) 10 years b) 30 years.

    asked by Andrzej
  247. Algebra

    A car rental company charges $24 per day plus $0.75 per mile driven. a) Let C = total cost; D = number of days and M = number of miles b) Write the equation for the total cost in terms of C, D and M c) Use the equation to determine the total cost for a

    asked by Randy
  248. math

    Refer to the following list of closing costs for purchase of a $ 175,000 house requiring a 20% down payment and find each requested amount. Title insurance premium $ 240 Document recording fee 30 Loan fee ( two points) ….. Appraisal fee 225 Prorated

    asked by Andrzej
  249. english

    Is this correct Having laid on the riverbank all day, the young vacationers missed their meals.

    asked by mom
  250. math

    find the horizontal asymptote of f(x)= 8x/2x^2+1

    asked by azmeena
  251. Math

    Please help i really need help!! Celine wants to know the width of the pond. She drew the diagram shown below and labeled it with the measurements she made. How wide is the pond? thnx!! :)

    asked by Anonymous
  252. Physics

    A typical photo-voltaic cell delivers 4.2×10^−3W of electric energy when illuminated with 0.15W of light energy. What is the efficiency of the cell?

    asked by Anonymous
  253. Chemistry

    In order for a cell potential to be a standard cell potential, the concentration of all ions in solution must be ________ M, the partial pressures of all gaseous species must be _______ atm, and the temperature must be ________ K. I need help with the

    asked by Ashley
  254. english

    his expression showed how highly he valued his own opinions and scored the view of the others. smug?

    asked by ashleigh
  255. psychology

    what is the study called where the same people are tested repeatedly at different ages?

    asked by chris
  256. Math

    The amount of a monthly electric bill (B, measured in $) depends on the amount of electricity used that month (E, measured in kWh). A typical public utility charges $0.12 per kWh for the first 300 kWh used, $0.17 per kWh for the next 600 kWh used, and

    asked by alice
  257. history

    1. How did the ‘ruling class’ change after the American Revolution? 2. How did the ‘ruling class’ change after the Haitian Revolution? 3. How did the ‘ruling class’ change after the French Revolution?

    asked by lauren
  258. Algebra

    Evaluate (4p+q)raised to the second for p=5 and q=-4. Express the answer as a fraction.

    asked by tmouery
  259. Language Arts

    Which sentence is the gerund used as an appositive? (1 point) Catering is a great way to show off your talent as a cook. The best part of catering is making a special occasion a tasty event. The girl has a new job, catering. Mr. Lane gives all of his time

    asked by C0L0RS
  260. Chemistry?HELP

    Is carbon graphite or a diamond harder to break or scratch and why. You must use an explanation of molecular geometry, intermolecular and intramolecular forces to answer this question. I'm confused...

    asked by Lisa
  261. Physics

    Determine the fuel needed to safely land a spacecraft. Start at y = 100km. Landing is y = 0km. Vy < 25 m/sec is a safe landing speed. g = -1.354 m/s^2 Acceleration due to thrust (where fuel used is 100 kgs*Ay-thrust Amax = 30 m/s^2 Amin = 5 m/s^2 What I

    asked by Mike
  262. math

    Find the exanct real number of sec^-1√2, w/out calculator.

    asked by Yester
  263. Math

    I am a whole number. I am greater than 50. Half of me is less than 30. My digit add up to 9. What number am I?

    asked by Leyton
  264. Spanish

    What is the difference between a preterite and imperfec.

    asked by Roscoe
  265. dynamics of rigid bodies

    prove that the weight of an object on the moon is approximately one-sixth of its weight on earth

    asked by Anonymous
  266. Civ/Hum

    How is Modernity reflected in the movie Metropolis

    asked by Michele
  267. Algebra URGENT

    Write an equation that is in slop-intercept form of the line that passes through the points: (-1/2, -1) and (3, 5/2).

    asked by Ann
  268. Algebra URGENT

    Write an equation of a line perpendicular to y=2x+3 and passes through (3,4).

    asked by Ann
  269. Science

    What is Pluto mainly composed of?

    asked by Navpreet
  270. physics

    For a helium atom containing two protons, two neutrons and two electrons: A)Calculate the first energy levels(n=1,2,3,4,5)(answers (-54.4eV, -6.04eV, -3.4eV, -2.176eV) b)Calculate the frequency in Hz of a proton emitted from n=2 to n=1 (answer 9.86x

    asked by chanty
  271. Biostats

    What statistical method(s) a researcher can use to determine if the mean body mass index of the population is the same for three groups of subjects (group i=diet restriction; group 2=exercise; group 3=none).

    asked by Mary
  272. reading

    can somebody help me with this homework . i need to make a poem with 6 words it was to rhyme . 1.-toil 2.-tilled 3.-bramble 4.-nectar 5.-thickets 6.-burrows

    asked by Gigi
  273. Please HELP Calculus

    set up an integral to find the volume of an equilateral tetrahedron.

    asked by Amy
  274. language arts

    can some one give me a sentence with the word ingratitude

    asked by gigi
  275. college chemistry

    what is the specific heat of a substance that required 800 joules of heat to raise the temperature of 50 grams of it from 20 degrees Celsius to 30 degrees Celsius?

    asked by airy
  276. 5th grade math

    Jason ate lunch at Virginia’s Diner. If his meal cost him $11.00, and he wants to leave Virginia a 15% tip, how much money should Jason leave for the total bill? A. $11.50 B. $12.00 C. $12.36 D. $12.50 E. $12.65 how do you do this?

    asked by lisa
  277. science

    Assume that the hereditary information carried in genes and DNA is responsible many differences observed in humans and other living things. How could just four different bases in DNA strands be responsible for the almost endless variety found in nature?

    asked by tammy
  278. college algebra

    Can someone please help me find the x-intercepts and y-intecepts of this equation. I have the radius, and center but I can't seem to get the intercepts. x^2+y^2=16x-18y+145=25 Please show work. Thanks!!

    asked by confused
  279. maths

    If ax^2 + bx + c = 0 If a,b,c E R. Find the condition that this equation would have atleast one root in [0,2].

    asked by sapna
  280. Chemistry

    In order for a cell potential to be a standard cell potential, the concentration of all ions in solution must be ________ M, the partial pressures of all gaseous species must be _______ atm, and the temperature must be ________ K. I need help with the

    asked by Ashley
  281. 2 Math Questions?

    1. Paul collects baseball cards. He has 10 outfielders, 7 pitchers, 3 managers, and 5 infielders. If he grabs a card at random, what is the probability that he will grab an outfielder card? a. 144 b. 216 c. 8 d. 72 2. If Hank flips one coin and rolls two

    asked by Shaquandala B.
  282. Calculus

    integral (4x^2-3x+2)/(4x^2-4x+3) dx

    asked by Anonymous
  283. Biology

    Hemoglobin is physiologically designed to deliver more Oxygen to exercising tissues than to resting tissues. Discuss three pieces of evidence that support this argument.

    asked by Jane
  284. Math 5th grade

    9K=414

    asked by Ishu
  285. Biology

    Why are alveoli so numerous (why not just a single large air sac for gas exchange)?

    asked by Anonymous
  286. advanced math

    find the real solutions. 3+ the square root of (2x+2)=x

    asked by kristina
  287. Algebra

    The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 167 and a variance of 4. The material is considered defective if the breaking strength is less than 163 pounds. What is the probability that a single,

    asked by Lost!!
  288. math

    On Wednesday, the low temperature was 56derees F and the high temperature was 72.What is the difference between the two temperature?

    asked by marthin
  289. Physics- PLEASE HELP

    The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is

    asked by Sarah
  290. Algebra

    Please show me step by step if possible: Find dimensions of a rectanglar rug whose perimeter is 28 ft and whose area is 45 ft². The length (longer side) equal ___ft and width (shorter side) equal ____ft.

    asked by sandy
  291. English - ms. sue

    thanks ms. sue for help with questions witht that story but i still need some help with few questions. it ask why the story be written in present tense? and is it good choice made by writer?

    asked by Mohammad
  292. Math

    Ben has 8 1/2. Pizzas to serve. How many pizza 1/4 pizza sized serving does he have??

    asked by Sofia
  293. calculus

    The midppoint of the line segment from P_1 to P_2 is (-5,4). If P_1=(-2,2), what is P_2? For the given equation list the intercepts and test for symmetry. 49x^2+y^2=49 Please show work

    asked by spazed out
  294. Math

    jen and heather went to lunch. When the bill came, Jen discovered that she has only $8.00. Luckily, heather had enough money to pay the other part, or 3/5 of the total bill. How much did Heather Pay?

    asked by Anonymous
  295. Marine Park.

    How many ML of fruit juice are in a 1/2 liter bottle

    asked by Aaliyah
  296. physics

    The SI unit of energy can be expresses as what?

    asked by elaine
  297. Math

    Find all solution of the trigonometric equation 3cosθ-√3=0 for θ in degrees.

    asked by Daisy
  298. Math

    Find all real solution of the equation sin^2x = -2+2cosx

    asked by Daisy
  299. Math

    I am divisible by four factors in addition to 1 and myself. I am 7 less than a number with a square array. I am less than 24. Which number am I?

    asked by Joshua
  300. Physics

    What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?

    asked by Adam
  301. Physics[CONCEPT- NO MATH]

    F = G(m1 x m2)/(d)^2 If you double the mass of one object and double the distance between the center of the two objects what happens to the force? If you double the mass of each object and double the distance between them what happens to the force?

    asked by Michael
  302. Calculus

    I can do the Ferris Wheel type. This one I can not solve. A light is attached to a 13 inch radius bicycle tire, at a point 8 inches from the center. If Harvey rides the bike at 15 mph, how fast is the light moving up and down at its fastest?

    asked by Reggie
  303. Biostats

    What statistical methods a researcher can use to determine if weights of the children in pounds are normally distributed or not?

    asked by Mary
  304. math

    If the diameter of a circle is half of a yard then its radius is how many inches?

    asked by noah
  305. chemistry

    12.00 liters of oxygen gas is under a pressure of 20 mm Hg. If the volume of this gas is decreased to 2.00 liters at constant temperature, what will the new pressure be? I believe this is Boyle's law and the answer should be 120 mm Hg, but according the

    asked by Jo
  306. math

    Mrs. Black has one begonia plant. If she buys two begonia plants each year for every one she has, how many will she have in four years? Please explain the answer.

    asked by Anonymous
  307. Algebra

    Do anyone know what the domain and vertical asymptote is for: f(x)=4 ln(x)

    asked by sandy
  308. math

    what is 1/7 + 2/4 in simplest form

    asked by destiny
  309. math

    what is 3/5 divided by 3/2

    asked by Anonymous
  310. maths-probability

    if a cube of 10 X 10 X 10 is slices into 1 X 1 X 1 cubes and then rearranged as earlier.if the outer most layer of cubes fall, how many cubes fall and how much are left....?

    asked by Meenakshi
  311. math

    a pitcher throws a baseball has a mass of 0.15kg. If the momentum of the ball is 5.9kg m/s what is the balls speed?

    asked by Anonymous
  312. maths --plse help me..

    A villager Itwaari has a plot of land of the shape of a quadrilateral. The Gram Panchayat of the village decided to take over some portion of his plot from one of the corners to construct a Health Centre. Itwaari agrees to the above proposal with the

    asked by sarika
  313. Arrays and an Expanded Algortim

    26 x 22

    asked by Mommy
  314. maths -profit and loss

    The profit on a certain item is 20%. If the CP is increased by Rs 50 and SP is increased by Rs 30 then the profit 5 reduces by 3 1/3%. Find the original CP and SP.

    asked by Meenakshi
  315. physical

    if there are x,y and z are three piston what is the area of piston y and how much force is exerted in the condition of friction is zero.

    asked by Anonymous
  316. Math - Please help

    The population standard deviation of people who shop online is 3.1. If you want to be 75% confident that the sample mean is within 10% of the population mean, how many people must be surveyed?

    asked by Alley
  317. Math

    One of my factors is 5 more than another of my factors. My digits add up to 6. I am less than 50. Which number am I?

    asked by Joshua
  318. Math

    When you add the number of rows in my array to the number in each row, you get 15. My digits add up to 9. Which number am I?

    asked by Joshua
  319. Science

    How are Jupiter and Saturn similar?

    asked by Navpreet
  320. hsm

    How do you adapt your communication approach from one individual to the next

    asked by karen
  321. english

    Is the following question correct? Set the salt and pepper on the table.

    asked by mom
  322. Social Studies 8

    The president was pressured to declare war on Great Britain by the....? Barbary pirates. Prophet. War Hawks. Peace Doves. I want to say either Barbary Pirates or Prophet (mostly Prophet), but I honestly have no idea.

    asked by L0vleyLayna
  323. math

    Assuming that the temperature has to be below freezing in order for it to snow, if the probability of the temperature being below freezing tomorrow is 85%, and the probability of there being precipitation tomorrow is 25%, what is the probability that it

    asked by bob
  324. ib english

    I need help writing an essay on the hysteria and how it relates to the red scare communism hysteria.

    asked by jimmy
  325. debate

    why would a capitalist society, in general, cause war?

    asked by Samantha
  326. calculus

    INTEGRATION USING PARTIAL FRACTIONS a) 4x^2-3x+2 / x^3-x^2-2x dx b) x^2 / (x+1)(x+1)^2 dx c) 3-3x / 2x^2+6x dx d) x^2+2x-1 / (x^2+1)(x-1) dx ##anybody can help me for this question?

    asked by kchik
  327. Science

    Hurry!!!!!!!!!!!!!!!!!!!!!!!!!!!! Which of the following is a speed, not a velocity? A. 35 m/s east B. –35 m/s C. 35 m/s D. 35 m/s south

    asked by Layla
  328. precalculus

    how do i change this into a standard ellipse equation 2x^2 + y^2= 3 , like i know i divide both side by 16 and get (2/3)x^2 +y^2 / 3= 1 but i don't know what to do with that 2/3 in front of the x

    asked by v
  329. Math -Ms. Sue please help

    Graph the inequality... y>-5x+3 All it shows is 4 graphs that are shaded - and I have to choose one...they are all dotted..can you help me please...

    asked by Deborah
  330. English

    Read the sentences Each sentence contains a word group that can be written as a contraction. Write the contractions We are going to the museum on Saturday We're Who is giving the report Who's They will never leave the decision to us They'll He is never

    asked by Jerald
  331. Chem

    Arrange the different types of forces in order of increasing energy. Covelant, Hydrogen bonding, Ion Dipole, Dipole-Dipole, Induced Dipole, and Ionic Bonding

    asked by Jay
  332. english

    Is this correct The white hen has laid the greatest number of eggs.

    asked by mom
  333. Physics

    Aluminum has a resistivity of 2.7*10-8 Ùm. What would be the resistance of 100 m of aluminum wire with a cross-sectional area of 2*10-4 m2?

    asked by Anonymous
  334. Science

    In one or two sentences, summarize what happens during each of the two stages of cellular respiration?

    asked by Anonymous
  335. university physics

    A copper sheet of thickness 2.19 mm is bonded to a steel sheet of thickness 1.13 mm. The outside surface of the copper sheet is held at a temperature of 100.0°C and the steel sheet at 25.7°C. a) Determine the temperature (in °C) of the copper-steel

    asked by jane
  336. math

    Write 2x^2+6x-5 in the form of a(x+h)^2 +k where a,h,k, are real numbers.(using completing the squares)

    asked by Lindsay
  337. math

    1/3 * 2 =

    asked by Himza
  338. Math HELP!

    1. Paul collects baseball cards. He has 10 outfielders, 7 pitchers, 3 managers, and 5 infielders. If he grabs a card at random, what is the probability that he will grab an outfielder card? a. 144 b. 216 c. 8 d. 72 2. If Hank flips one coin and rolls two

    asked by JJ.
  339. strayer

    Determine the comparable interest rate for a $50,000 loan when the quoted information is 12.1% + 0.5 pt + $200. (Round your answer to two decimal places.)

    asked by deidre
  340. Math

    If you count backward from me to divide me by 8, the sixth number you reach is 48. Which number am I?

    asked by Joshua
  341. algebra2

    how do you find out the vertex when graphing inequalities of quadratics in equations like this y

    asked by jake
  342. math

    A Caribbean cruise is offered if the average quarterly sales for just the 3rd and 4th quarters is $120,000, what is the 4th quarter? How do you divide two quarters to get the average? Thank you in advance. Edna

    asked by Edna
  343. maths

    35% of 20

    asked by HELPME!!!!!!!!!
  344. english

    Is the following sentence correct Lsy your clothes out at night, and you will have a head start in the morning.

    asked by mom
  345. language arts

    can some one give me a sentence with idolize.

    asked by gigi
  346. Physics HELP!

    I have NO idea how to do this! any help is great! A car of maass 1330kg is traveling at 28m/s. The driverapplies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car. From this i can see that it

    asked by Maggie
  347. math

    explian in writing how waould you use a number line to round 148 to the nerst ten

    asked by amber
  348. math

    solve each inequalitiy y+ (-5) > -6

    asked by kyle
  349. Math

    60 tried out for the play 0.7 were chosen what fraction were not chosen ?

    asked by Anonymous
  350. maths-geometry

    how can we prove that parallelogram has parallel sides??

    asked by Anamika
  351. Trig

    cos x cot = csc - sin

    asked by Alycia
  352. English - ms. sue

    ms. sue in morning you plase take a look at my old post? yesterday?

    asked by Mohammad
  353. math 6th grade

    what does y=x

    asked by sally
  354. simple math

    how do i write out 17260 million 1,726,000? is that write or 17,260,000

    asked by anne
  355. Maths

    what is 0.1 of 240

    asked by HELPME!!!!!!!!!
  356. math

    What is 1 1/2 x 3?

    asked by Anonymous
  357. math

    65 oz= how many lb explain please

    asked by alinna