1. Math

    Earth orbits the sun in an elliptical pattern. the equation of earths path is (x+2.5)^2/22350.25 + y^2/22344=1 where the measurements represent millions of kilometers. The sun is located at the focus (0,0). In january, earth id located at one vertices

    asked by Milo on October 31, 2018
  2. Math

    Determine whether the statement is true or false. The lines with equation ax+by+c1=0 and bx-ay+c2=0, where a ≠ 0 and b≠ 0, are perpendicular to each other. ______________________________________________ True. The slopes of the lines are m1 and m2

    asked by Kal Jay on October 16, 2016
  3. Math

    A basket of 50 golf balls contains 22 yellow balls. If 8 balls are selected at random from the basket, determine the probability that none of those selected is a yellow ball.

    asked by Jeri on March 3, 2016
  4. Chemistry

    Determine the identity of an unknown solution that formed a yellow precipitate with solution 1, No Reaction with solution 2, No Reaction with solution 3, and a canary yellow solution with solution 4?

    asked by Tiffany on May 1, 2012
  5. matematicas

    in a class of 25 students, 15 play hockeyand 16 play basketball. if there are 4 students who play neither sport, determine the number of students who play both hockey and basketball

    asked by alba on December 6, 2015
  6. Math

    1. What is the intercept (y-intercept) of the function y = 2.5x + 8 2. What is the x-intercept of the function y = 2.5x + 8 3. What is the slope of the function y = 2.5x + 8 4. The sides of a triangle are 6,10, and 12. Using Pythagorean Theorem, determine

    asked by hiya on March 7, 2018
  7. maths

    Michelle is making a scale drawing of a building. The scale for the drawing is 1 inch = 6 feet. The height of the building in the drawing is 7 1/4 inches. Determine the height of the actual building.

    asked by lisa on February 18, 2011
  8. Algebra

    A rectangular museum painting has a uniform width frame around it. The frame is 8 feet high by 10 feet long. If the diagonal of the painting is 10 feet, determine the width of the frame.

    asked by Anonymous on May 11, 2017
  9. Chemistry

    If the time at which a radioactive material decays to half of its original mass is twice the time at which the original mass of the material reduces to 80g.Determine the original mass of the substance .

    asked by Linda on November 14, 2018
  10. Math

    Determine if the number is written in scientific notation. If not, explain; 3 x 100⁻⁶. A. No; it is not written as a power of 10. B. No; the first factor is not a number between 1 and 10. C. Yes; the number is written in scientific notation. I'm almost

    asked by D on March 14, 2018
  11. Physics

    The drawings show three charges that have the same magnitude but different signs. In all cases the distance d between the charges is the same. The magnitude of the charges is |q|= 5.5 µC, and the distance between them is d = 4.3 mm. Determine the

    asked by Don on February 3, 2013
  12. math

    Marco is making a scale drawing of a building. The scale for the drawing is 1 inch = 7 feet. The height of the building in the drawing is 1 foot. Determine the height of the actual building. Someone please help me.

    asked by Becky on June 16, 2010
  13. Pre-calculus-check answers

    Write the polynomial equation of least degree that has the roots: -3i, 3i, i, and -i. Answer: (x+3i)(x-3i)(x-i)(x+i)=x^4+x^3-x^3i+9x^2+9x-9xi-9i 2)Determine if the expression 4m^5-6m^8+m+3 is a polynomial in one variable. If so, state the degree. Answer:

    asked by Lucy on August 23, 2008
  14. Math

    Suppose R is the relation on N where aRb means that a ends in the same digit in which b ends. Determine whether R is an equivalence relation on N. And, Suppose that R and S are equivalence relations on a set A. Prove that the R ¿ S is also an

    asked by Martin on November 18, 2011
  15. physics

    A motorist drives along a straight road at a constant speed of 15.0 m/s. just as she passes a parked police officer,the officer starts to accelerate at 2.00 m/s^2 to overtake her. assuming the officer maintains this acceleration, a) determine the time it

    asked by kevin on January 16, 2011
  16. physics

    A motorist drives along a straight road at a constant speed of 15.0 m/s. just as she passes a parked police officer,the officer starts to accelerate at 2.00 m/s^2 to overtake her. assuming the officer maintains this acceleration, a) determine the time it

    asked by kevin on January 17, 2011
  17. math data management

    a multiple choice quiz has 10 questions. each question has five possible answers.carman is certain that she knows the correct answers for questions 1 and 4. if she guesses the other questions, determine the probability that she gets 60 % on the quiz ? i

    asked by rainy on August 23, 2016
  18. Chemistry

    Determine whether each of the following salts will form a solution that is acidic, basic, or pH-neutral? Al(ClO4)3-Acid LiCl-Neutral KClO2-BAse C6H5NH3NO2-Acid CH3NH3Br-Acid KCl-Neutral NaClO-Base NH4ClO-Acid Fe(ClO4)3-Acid C2H5NH3NO3-Acid Is this right?

    asked by Anonymous on October 23, 2010
  19. Math

    Part C Two days later, Kelly surveyed the same 13 classmates and found that none of them had been given math homework since she last surveyed them. By how much does the mean of Kelly’s second data set change in comparison with the mean of the data set in

    asked by Sherley on February 26, 2018
  20. Chemistry

    The density of iridium is 22400 kg/m3 and the cell volume is 5.66 x 10-23 cm3. Determine the number of atoms in the unit cell. Note: the number of atoms in a unit cell is a whole number. The molar mass of iridium is 192.22. I know that this can either be a

    asked by Sidney Ngo on February 8, 2017
  21. physics

    A bowling ball is rolling along a table with a constant velocity of 0.7 m/s. The table top is 1.1 meters (H) from the ground in height. Determine the horizontal range of the bowling ball as it falls to the floor. In other words, how far from the edge of

    asked by Zach on March 9, 2018
  22. Calculus 2

    Determine whether the series is convergent, absolutely convergent, conditionally convergent, or divergent. On top of the summation sign (∑) is infinity. Under the summation sign is n=2, and right next to it (to the right of ∑ sign) is (n root of

    asked by Sena on April 26, 2015
  23. Chemistry

    Bromine and chlorine gas react to give bromine monochloride (BrCl) according to Br2(g)+Cl2(g)⇌2BrCl(g) Given initial concentrations [Br2]=1.50 mol L-1, [Cl2]=0.90 mol L-1 and [BrCl]=0 and K=7 determine (to two decimal places) the equilibrium

    asked by Amelia on February 26, 2018
  24. Biology

    (This question ties into the previous question I posted about mRNA). Use the Universal triplet code to determine the sequence of amino acids that would be generated for each of the mRNA sequences that you generated in question 2. Remember that the reading

    asked by Danielle on March 22, 2014
  25. physics

    While on a trail, a mountain biker encounters a sandy patch that is 7.1 m long. The speed of the bike entering the patch is 10.1 m/s. If the force exerted by the sand on the bike/biker system (103.8 kg) is 514 N, determine the speed of the biker when

    asked by Kelly on December 10, 2009
  26. maths

    2. A bar of uniform section is 81.4cm long and weighs 4.45 kg. A weight of 12.8 kg is suspended from one end. The bar weight combination is to be suspended from a cable attached at the balance point. a)Determine how far from the weight should the cable be

    asked by david on November 4, 2012
  27. Chemistry

    Bones are mostly calcium phosphate. Calcium chloride reacts with potassium phosphate to form calcium phosphate and potassium chloride. Indicate the physical states or reactants and products a) Write the balanced equation of the information above b)

    asked by mandi on September 26, 2014
  28. chemistry

    Solubility (g/100gH2O) Substance 20∘C 50∘C KCl 34.0 42.6 NaNO3 88.0 114.0 C12H22O11 (sugar) 203.9 260.4 Using the above table, determine whether each of the following solutions will be saturated or unsaturated at 50 ∘C. 1.) Adding 19.7 g KCl to 35.0

    asked by maria on July 17, 2016
  29. Chemistry

    Determine whether each of the following salts will form a solution that is acidic, basic, or pH-neutral? Al(ClO4)3-Acid LiCl-Neutral KClO2-BAse C6H5NH3NO2-Acid CH3NH3Br-Acid KCl-Neutral NaClO-Base NH4ClO-Acid Fe(ClO4)3-Acid C2H5NH3NO3-Acid Is this right?

    asked by Anonymous on October 23, 2010
  30. math

    A projectile is fired directly upward with a muzzle velocity of 860 feet per second from a height of 7 feet above the ground. a. Determine a function for the height of the projectile t seconds after it’s released. b. How long does it take the projectile

    asked by bill on March 7, 2010
  31. precalculus

    Find the inverse of the function below. Graph the function below and the inverse function. Determine the domain, range, and asymptotes of the function below and the inverse function. Please show all of your work. and graph. f(x)=e^-x/2+4

    asked by tonia on November 11, 2011
  32. Math

    Find B when A = 76 degs, a = 34, and b = 21. My ans: 0.5993 degs Determine the area of the triangle in which A = 126 degs, b = 9, and c = 10. My ans: 36.41^2 units? Find a when C = 130 degs, B = 29 degs, and c = 15. My ans: 7.02

    asked by Anonymous on November 1, 2015
  33. Algebra

    A model rocket is launched straight upward from the side of a 256-ft cliff. The initial velocity is 96 ft/sec. The height of the rocket h(t) is given by: h(t) =-16t^2+96t+256 where h(t) is measured in feet and t is the time in seconds. Determine the time

    asked by Lia on January 19, 2017
  34. chem

    25.0 mL of 0.125 M silver nitrate are mixed with 35.0mL of 0.100 M sodium sulfate to give solid silver sulfate. Write the net ionic equation, and determine the mass in grams of silver sulfate produced. I think the net ionic equation is 2Ag(aq) + SO4^-2(aq)

    asked by Lori on December 14, 2010
  35. Statistics

    You are getting ready to take a sample from a large population, and need to determine the appropriate sample size. You are estimating sales at a large chain of department stores. A previous survey from the same population found a standard deviation of $18.

    asked by Devika on July 16, 2012
  36. linear(hw check)

    determine if v1= [ 2 1 0] v2=[ -1 1 3] v3=[ 0 -1 6] spans the vector space of rows with three real entries which has dimension 3. so I wanted to make sure I did this correct. First I created a matrix with v1,v2,v3 as the columns (so for example column 1= 2

    asked by kirsten on March 4, 2015
  37. Statistics

    A survey is taken among customers of a fast-food restaurant to determine preference for hamburger or chicken. Of 200 respondents selected, 75 were children and 125 were adults. 120 preferred hamburger and 80 preferred chicken. 55 of the children preferred

    asked by manpreet on October 22, 2018
  38. math

    I have a graph that shows a ---- kind of 3 line above the solid line for x & y. My assignment is as follows. Whe have graphed the boundary line for the liear inequality. Determine the correct half-plane. y >3 First how do I solve and 2 how do I graph it?

    asked by Diana on June 1, 2007
  39. Quantum mechanics, eigenfunctions!

    Determine if the function sin(x)*e^(ax) where a=constant is an eigenfunction of the operators d/dx and d^2/(dx)^2 Okay. My understanding is that you use the operator and perform its "thing" on the function. In this case, you will have to find the 1st

    asked by Steven on October 8, 2009
  40. Dynamics of rigid bodies

    The car is traveling at a speed of 60 mi/hr as it approaches point A. Beginning at A, the car decelerates at a constant 7ft/sec2 until it gets to point B, after which its constant rate of decrease of speed is 3ft/sec2 as it rounds the interchange ramp.

    asked by Anonymous on March 6, 2017
  41. science

    2. An electric fan having a radius of 0.5 m is running on HIGH. After the LOW button is pressed, the angular speed of the fan decreases to 83.8 rad/s in 17.5 s. the deceleration is 42.0 rad/s2. Determine a) The initial angular speed of the fan b) the

    asked by Jeff on April 11, 2012
  42. physics

    A student with mass (72.0) kg rides on a roller coaster with a vertical loop. At the top of the loop the track has a radius of (23.7) m and the roller coaster moves at speed of (25.9) m/s at the top. Determine the normal force from the seat on the student

    asked by yoalin on March 8, 2017
  43. Mechanics

    A man attempts to support a stack of books horizontally by applying a compressive force of F = 120 N to the ends of the stack with his hands. If each book has a mass of 0.95 kg, determine the greatest number of books that can be supported in the stack. The

    asked by Qusai Nalawala on October 6, 2015
  44. Physics

    A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient

    asked by Ali on March 4, 2014
  45. Physics

    A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient

    asked by Trevor on March 4, 2014
  46. Physics

    A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient

    asked by Pilar on March 5, 2014
  47. Physics

    A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient

    asked by Wendy on March 4, 2014
  48. statistics

    The director of an inner-city hospital believes that the average cost per gunshot injury of patients admitted to the hospital’s emergency room is $18,000. A random sample of 9 gunshot injuries had a mean of $17,213 with a standard deviation of $572.

    asked by Anonymous on August 2, 2011
  49. physics

    The chain is composed, as shown in the figure, E ₁ = 1,8, E ₂ = 1,7, E B ₃ = 1,5, r ₁ = 0,2 Ohm, r ₂ = r ₃ = 0,1 Ohm. Determine the resistance R and the current strength in all parts of the chain, if you know that the third element of the

    asked by lexci on September 26, 2011
  50. Language Help PLZZ

    1. What is the purpose of book response activities? to practice all stages of the writing process to help you determine if you want to be an author to imagine yourself as a character in the book you read to illustrate or demonstrate what you have learned

    asked by YOLO on May 19, 2015
  51. Math

    Five employees at the Wild Fowl Publishing Company each come to work by a different one of five means: car, railroad, subway, and walking. They hold these positions at the company: art director, editor, publisher, receptionist, and secretary. Two of them

    asked by Mike on December 15, 2011
  52. physics

    Question Part Points Submissions Used 1 2 3 3/3 0/2 0/5 3/10 1/10 1/10 Total 3/10 Consider a conical pendulum with a 90.0 kg bob on a 10.0 m wire making an angle of θ = 3.00° with the vertical. (Consider + to be towards the center of the circular path.)

    asked by carlton on October 22, 2011
  53. science

    A beam 6 m long is simply supported at the ends,and carries a uniform distributed load of 1500kg/m (including its own weight ) and three concentrated loads of 1000,2000 and 3000 kg acting respectively at the left quarter point,centre point and right

    asked by Mingle on December 2, 2015
  54. cellbio

    Griffith's experiments along with Avery, MacLeod and McCarty helped to determine the transforming factors of Pneumococcus bacteria. Using heat-killed S-strain bacteria and one particular fraction of the cell lysates, they were able to demonstrate that

    asked by Josh on July 21, 2006
  55. Physics

    An airplane with a speed of 76.8 m/s is climbing upward at an angle of 48° with respect to the horizontal. When the plane's altitude is 560 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly

    asked by Natasha on February 8, 2012
  56. physics

    A beam 6 m long is simply supported at the ends,and carries a uniform distributed load of 1500kg/m (including its own weight ) and three concentrated loads of 1000,2000 and 3000 kg acting respectively at the left quarter point,centre point and right

    asked by Marfo on December 5, 2015
  57. Dynamics

    The propellers of a ship of weight W can produce a propulsive force F0; they produce a force of the same magnitude but of opposite direction when the engines are reversed. Knowing that the ship was proceeding forward at its maximum speed v0 when the

    asked by Dynamics Problems on July 19, 2014
  58. statistics

    Question Details The following data was collected to determine whether or not Monroe County College students work 18 hours per week: 20,22,25,12,30,49,10,30,17,15,0,24,20,22,23,20,25,24,30,12,15,29,0,25,2,40,30,0,33,0,45,30,38,48,0,40,20,0,0,24. a)

    asked by Lajuanda on March 8, 2012
  59. Thermodynamics/ Energy

    Determine the effects of compression ratio on the net work output and the thermal efficiency of the Otto cycle for a maximum cycle temperature of 2000 K. Take the working fluid to be air that is at 100 kPa and 300 K at the beginning of the compression

    asked by Theo on December 8, 2016
  60. FINANCE

    Life for Kids Company, a small producer of plastic swimming toys, wants to determine the most it should pay to purchase a particular ordinary annuity. The annuity consists of cash flows of $700 at the end of each year for 5 years. The firm requires the

    asked by JUNE on March 23, 2010
  61. Marketing Management

    As a market researcher for a cable television company seeking to determine the number of multi-dwelling buildings in a selected neighborhood, your best chance of acquiring this information quickly would be a. census information available on the Internet.

    asked by Shirelyn on July 16, 2007
  62. Dr. Bob

    Okay now can you read my introduction for me please... INTRODUCTION: This report discusses an experiment to study the percent mass of iron determined by the concentration of a colored iron solution from the absorbance of the spectrometer. This lab is

    asked by Suzy on November 19, 2007
  63. Mechanical Vibration

    An engineer wishes to determine the moment of inertia oa a machine part mass 1.2 kilogram about a particular axis (the X-X' axis) through the CM. He locates the CM by suspending the object motionless from several different points around its periphery. He

    asked by Kerwin Jid Lingating on August 13, 2016
  64. Algebra

    The body mass index I can be used to determine an individuals risk for heart disease. An index less than 25 indicates low risk. the formula for body mass index is I=700w/H^. W=weight and H=height, Jeromine is 67 inches tall. What weights will keep his body

    asked by Tom on May 11, 2012
  65. physics

    Vector V1 is 6.29 units long and points along the negative x axis. Vector V2 is 4.23 units long and points at +35.0° to the +x axis. (a) What are the x and y components of each vector? V1x = V1y = V2x = V2y = (b) Determine the sum V1 + V2. Magnitude

    asked by michael on September 30, 2012
  66. UMass

    'The rectangular swimming pool in the figure shown measure 40 feet by 60 feet and is surround by a path of uniform width around the four edges. the perimeter of the rectangular formed by the pool and he surrounding path is 248 feet determine the width of

    asked by roben on October 29, 2014
  67. PHY

    Vector V1 is 9.00 units long and points along the negative x axis. Vector V2 is 4.72 units long and points at +50.0° to the +x axis. (a) What are the x and y components of each vector? V1x = V1y = V2x = V2y = (b) Determine the sum V1 + V2. Magnitude AND

    asked by ami on August 22, 2010
  68. Math

    The distance, "d", to the horizon (= farthest point on the earth still visible) for an object that is "h" miles above the surface of the earth is given the formula d = the square root of 8000h +h^2. Determine how many miles above the surface of the earth

    asked by Anonymous on May 9, 2017
  69. physics homework 8!

    To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 365 N. Neglect any friction between the rope

    asked by Nerdy Nancy on February 8, 2011
  70. Physical Science

    Plse help i need so much help on thes questions i am SO confused 10. What is stucturally diffrent between an atom and an ion? 13. If prontons and neutrons have the same mass wat is the approximate mass of apronton and nuetronin atomic mass units (amu)? 16.

    asked by Amy on September 29, 2008
  71. chem

    When solid calcium is placed in water, it undergoes a vigorous reaction that produces solid calcium oxide, CaO(s) and hydrogen gas. determine the volume of dry hydrogen gas that is produced when 5.00 g of calcium reacts and the gas is collected at 42

    asked by julie on January 12, 2015
  72. Physics GO! (82)

    To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 365 N. Neglect any friction between the rope

    asked by Tiffany on February 7, 2011
  73. math

    I'm not sure how to work this problem out. Find it very confusing and my answer keeps changing. Please help. From an observation tower that overlooks a runway, the angles of depression of point A, on one side of the runway, and point B, on the opposite

    asked by Denisha on August 22, 2011
  74. chemistry

    you are conducting a freezing-point determination in the laboratory by using an aqueous solution of KNO3. The observed freezing point of the solution is -1.15 C. Using a pure water sample, you recorded the freezing point of the pure solvent of the same

    asked by Anonymous on February 17, 2011
  75. Algebra

    Say we want to determine how many people we can invite to a party for a given budget ($ input). We want one snack and one soda for each person. The snack cost is $1 and the soda cost is $1 per can for $2 total. How many people I can invite (the range)

    asked by laura Mills on March 4, 2011
  76. statistics

    Randomly selected students participated in an experiment to test their ability to determine when one minute(or sixty seconds) has passed. Forty students yielded a sample mean of 61.8 seconds. Assuming that o= 11.7 seconds, Construct and interpret a 99%

    asked by anonymous on November 17, 2013
  77. chemistry

    Acid is required for calcium carbonate to fully dissociate. Determine the volume of 6M hydrochloric acid that must be added to dissolve the mass of CaCO3 you calculated in the question above taking into consideration the equations below. CaCO3->Ca+CO2

    asked by Jennifer on October 14, 2015
  78. Chemistry

    A student performed an experiment to determine the molecular weight of a gaseous compound. Using the ideal gas law PV = nRT, and knowing the pressure, temperature, and volume of the vapor, the student calculated the number of moles of gas, n, to be 0.0443

    asked by Ericka on November 15, 2015
  79. Financial Management

    National Telephone and Telegraph Company common stock currently sells for $60 per share. NTT is expected to pay a $4 dividend during the coming year, and the price of the stock is expected to increase to $65 a year from now. Determine the expected

    asked by Tuty on July 20, 2008
  80. gammar

    True/False. Determine if the following sentences employ the correct use of commas and apostrophes. Choose true if the sentence is punctuated correctly or false if it is punctuated incorrectly The infant’s first dextrose stick after delivery was 23;

    asked by kerston on December 11, 2015
  81. composition&communication

    Flat Irons vs. Curling Irons Do you have trouble deciding what heated styling utensil will be best for your hair? Both the curling iron and flat iron offer diversity with their styles, tips, results, damage affects, and amount of time each take for

    asked by Katelynn on November 2, 2012
  82. math

    a city is served by two newspapers-the Tribune and the Daily News. Each Sunday a reader purchases one of the newspapers at a stand. The following transition matrix contains the probabilities of a customers buying a particular newspaper in a week given the

    asked by tracy on November 14, 2014
  83. college (physics thermo)

    A 1.20 mol sample of an ideal diatomic gas at a pressure of 1.20 atm and temperature 380 K undergoes a process in which its pressure increases linearly with temperature. The final temperature and pressure are 680 K and 1.83 atm. (assume 5 active degrees of

    asked by dennis on February 2, 2009
  84. physics

    Interestingly, there have been several studies using cadavers to determine the moment of inertia of human body parts by letting them swing as a pendulum about a joint. In one study, the center of gravity of a 5.0 kg lower leg was found to be 18 cm from the

    asked by zidd on April 13, 2010
  85. Analytical Chem

    Determine [Zn2 ], [CN–], and [HCN] in a saturated solution of Zn(CN)2 with a fixed pH of 2.390. The Ksp for Zn(CN)2 is 3.0 × 10–16. The Ka for HCN is 6.2 × 10–10. I know the following is what needs to be done, but im unsure of how to go about it.

    asked by Anonymous on September 16, 2014
  86. Physics

    1. The water pressure in a kitchen faucet is 3.43 x 10^5 N/m^2. How high above the faucet is the surface of the water in the storage tank? 2. A swimming pool 8.0 m x 15.0 m has a uniform depth of 2.0 m. Determine the total force and the absolute pressure

    asked by Reborn on September 3, 2014
  87. Sophia

    The following formula relates the distance S (in feet) traveled by a vehicle during an emergency stop to the time T (in seconds) it takes to arrive at a complete stop: s(t)=16t^{2} At the scene of an accident, Bill uses skid marks to determine the braking

    asked by Matt on August 12, 2015
  88. Physics

    Directly below on the floor is a stationary 428-Hz source of sound. The microphone vibrates up and down in simple harmonic motion with a period of 2.3 s. The difference between the maximum and minimum sound frequencies detected by the microphone is 2.2 Hz.

    asked by Claire on January 29, 2012
  89. PHYSICS

    The average kinetic energy of an atom in a monatomic ideal gas is given by KE=3/2kT, where k=1.38*10^-23J/K and T is the Kelvin temperature of the gas. Determine the de Broglie wavelength of a helium atom (mass=6.65*10^-27kg) that has the average kinetic

    asked by Elaine on April 29, 2008
  90. Math

    School is planning to purchase a new copy machine. The principal has narrowed the choice to two models. Superfast Deluxe and Quick Copies. He plans to purchase the machine that copies the quickest rate. Use this info to determine which one is faster. Quick

    asked by Tom on November 18, 2013
  91. Physics

    A flat mirror that is 0.85m tall is attached to a wall so that its upper edge is 1.7m above the floor. Use the law of reflection and a ray diagram to determine if this mirror will show a person who is 1.7m tall his or her complete reflection. I don't know

    asked by Ashley on October 1, 2017
  92. chemistry

    When carbon dioxide is heated in a closed container, it decomposes into carbon monoxide and oxygen according to the following equilibrium equation: 2CO2(g) ---> 2CO(g) + O2(g) When 2.0 mol of CO2(g) is placed in a 5.0-L closed container andheated to a

    asked by Thomas on March 30, 2008
  93. Math

    5. The Leaning Tower of Pisa leans toward the south at an angle of 5.5 degrees. One day near noon its shadow was measured to be 84.02m long and the angle of elevation from the tip of the shadow to the following, assume that the Tower is like a pole stuck

    asked by Alicia on January 19, 2011
  94. Pre- Algebra

    1. Grade 7 students were surveyed to determine how many hours a day they spent on various activities. The results are shown in the circle graph below. Find the measure of each central angle in the circle graph. a. Sleeping b. Eating School 25% Sleeping 33%

    asked by #FreeGucci on February 26, 2016
  95. Chemistry

    I had to perform an experiment for the freezing point depression in which we had to determine the frezzing points of water as a pure solvent, sodium chloride, sucrose, and ethylene glycol. We had to work with a partner so I completed the experiment for

    asked by Hannah on February 20, 2012
  96. geometry

    THE FOLLOWING ANGLES ARE COMPLEMENTARY ANGLES. DETERMINE THE MEASURES OF ANGLE 1 AND ANGLE 2. X= ANGLE 1 3x+10= ANGLE 2

    asked by angela on June 27, 2012
  97. Math

    Determine whether the statement is true or false. If the statement is true of false explain why. Can you please help?

    asked by Helen on March 7, 2016
  98. Math

    Determine the value of y so that the line segment with endpoints P(3, y) and Q(-3, -1) is parallel to the line segment with endpoints R(-4, 9) and S(5,6).

    asked by Anonymous on April 22, 2015
  99. Consider the functions

    Consider the functions f(x)= 5x+4/x+3(This is a fraction) and g(x)= 3x-4/5-x(This is a fraction) a)Find f(g(x)) b)Find g(f(x)) c)Determine whether the functions f and g are inverses of each other.

    asked by Kayleigh on April 10, 2013
  100. Calc.

    Determine the interaction of the line of intersection of the planes x + y - z = 1 and 3x + y + z = 3 with the line of intersection of the planes 2x - y + 2z = 4 and 2x + 2y + z = 1.

    asked by Derek on July 10, 2008

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