Questions Asked on
September 7, 2012

  1. chemistry

    the diameter of a helium atom is about 1*10^2pm.suppose that we could line up helium atoms side by side in contact with one another. aproximately how maney atoms would it take to make the distance from end to end 1cm ?

    asked by whitney
  2. Geometry

    Write these definitions using the classify and differentiate method to fill in the blanks: a. An octagon is __________ that ___________. b. A concave polygon is __________ that ___________. c. A 20-gon, also called an icosagon, is __________ that

    asked by Astrid
  3. physics

    In an action movie, the villain is rescued from the ocean by grabbing onto a ladder hanging from a helicopter. He is so intent on gripping the ladder that he lets go of his briefcase full of counterfeit money when he is 126.4 m above the water. If the

    asked by Nathan
  4. math

    The table shows the median home prices in Florida. What is the equation of a trend line that models a relationship between time and home prices? Use the equation to predict the median home price in 2020. Year 1940 1950 1960 1970 1980 1990 2000 Median

    asked by nay
  5. math

    The distance between city A and city B is 500 miles. On a certain wall map, this is represented by a length of 2.3 feet. On the map, how many feet would there be between city C and city D, two cities that are actually 800 miles apart? On the map, city C

    asked by Kelly
  6. physics

    Electrons move through a certain electrical circuit at an average speed of 1.7 x 10-2 m/s. How long (in minutes) does it take an electron to traverse a 1.8 -m light bulb filament coil?

    asked by Redgy22
  7. Programming in Python

    A customer in a store is purchasing five items. Design a program in python that asks for the price of each item, and then displays the subtotal of the sale, the amount of the sales tax , and the total. Assume the sales tax is 6 percent.

    asked by Mona
  8. chemistry

    an aluminum cylinder is 10.0 cm in length and has a radius of .25 cm. if the mass of a single atom of aluminum is 4.48X10^-23 calculate the number of aluminum atoms present in the cylinder. the density of aluminum is 2.70 g/cm^3 Please answer quickly.

    asked by Krista
  9. english

    The statement below represents which genre from the early american and colonial period. I want to explain origins of the natural world and its processes. the poetry of anne bradstreet the oral tradition of native americans the journals of william bradford

    asked by kevin
  10. Maths

    whats the probability of gatting a matching pair of socks if there are 8 gree and 10 blue

    asked by callum
  11. math

    how many 4 number combinations can there be from 0-99 without repeating a number?

    asked by Hanna
  12. physics

    The highest George can suck water up a very long straw is 2.0m What is the lowest pressure he can maintain in his mouth? Express to two sig figs

    asked by george
  13. physics

    Assume that a small sugar cube has sides 1 cm long. If you had a box containing 1 mol of cubes and lined them up side by side, how long would the line be (1 mol = 6.02 x 10^23)?

    asked by Mark
  14. Economics

    Suppose the U.S government decides that the incomes of dairy farmers should be maintained at a level that allows the traditional family dairy farm to survive. It therefore implements a price floor of $1 per pint by buying surplus milk until the market

    asked by Cecilia
  15. world history

    What were the 3 primary causes for the Roman Revolution?

    asked by anonymous
  16. algebra

    Calvin invested $7500 for one year, part 12% annual interest and the rest at 10% annual interest. His total interest for the year was $890. How much money did he invest at 12%?

    asked by Briana
  17. CHEMISTRY

    What is the wavelength in meters for light having a frequency of 2.40 X 10ˆ12 sˆ-1? What portion of the electromagnetic spectrum does this belong?

    asked by Kimberly
  18. Chemistry

    A vinegar sample is found to have a density of 1.006 {\rm{ g/mL}} and to contain 4.2\% acetic acid by mass.How many grams of acetic acid are present in 1.20L of this vinegar?

    asked by Roxy
  19. physics

    A lead bullet with a mass of 0.05 kg traveling at 188 m/s strikes an armor plate and comes to a stop. If all the energy is converted to heat and absorbed by the bullet, what is the temperature change?

    asked by Anonymous
  20. physics

    Spherical particles of a protein of density 1.4 g/cm3 are shaken up in a solution of 20°C water. The solution is allowed to stand for 1.0 h. If the depth of water in the tube is 4.0 cm, find the radius of the largest particles that remain in solution at

    asked by Bah
  21. algebra

    HELP! Please Calvin invested $7500 for one year, part 12% annual interest and the rest at 10% annual interest. His total interest for the year was $890. How much money did he invest at 12%? Show work.

    asked by Briana
  22. spanish

    Write a conversation between two friends. One friend invites the other to do an activity (something from this unit) and the other friend agrees to do the activity. Then a third friend joins them and they invite that friend who has to decline because he has

    asked by SATA
  23. physics

    A racing car reaches a speed of 40 m/s. At this instant, it begins a uniform negative acceleration, using a parachute and a braking system, and comes to rest 5.0 s later. (a) Determine the acceleration of the car. (b) How far does the car travel after

    asked by Tamera
  24. chemistry

    potassium chlorate will decompose to produce potassium chloride and oxygen gas . if you begin with 45 kg of potassium chlorate, how many liters of oxygen gas measured at stp might you expect to produce from this reaction

    asked by sam
  25. Chemistry

    A lead atom has a mass of 3.4x10^-9g. How many lead atoms are in a cube of lead that has a volume of 2.00cm^3 if the density of lead is 11.3g/cm^3?

    asked by Hope
  26. heat transfer

    Explain the concept of critical thickness of insulation with expression

    asked by paper kro
  27. math

    How to write the ration as a fraction in lowest terms. Compare in hours. 22 hours to 3 days. The ratio is __.

    asked by Kelly
  28. physics

    A tennis ball with a speed of 6.0 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 4.0 m/s. If the ball is in contact with the wall for 0.012 s, what is the average acceleration

    asked by Tamera
  29. college physics

    A 2000kg van and a 1500 kg car both travelling at 40ms^-1 in opposite directions collide head on and lock together. what are their speed and direction immediately after the collision?

    asked by Mariam
  30. Physics

    What length of #22 B&S gauge copper wire is needed to make a resistance of 500 ohms? This is what I came up with but don't think it is correct. looked up diameter for #22 gauge wire = .643 mm and converted to m 6.46 * 10^-4. Used Eq. A = (pi)(d^2)/4 => A =

    asked by Kevin
  31. Physics

    When the sun is 30.4 degrees above the horizon, you measure the shadow of a tree to be 52.9 meters long. How tall is the tree?

    asked by Nathan
  32. world geography

    Where on Earth? which of the 12 northern eurasian cities will be the home of your company's newest restaurant? hint: use information from an atlas and al almanac to eliminate all but one city

    asked by christina
  33. Physics

    A woman and her dog are out for a morning run to the river, which is located 4.56 km away. The woman runs at 3.27 m/s in a straight line. The dog is unleashed and runs back and forth at 5.23 m/s between his owner and the river, until she reaches the river.

    asked by Redgy22
  34. accounting

    1. Sharon Kent is a realtor. She organized her business, called SK Realty, as a corporation on April 1, 2011. Sharon started the business by depositing $105,000 in cash into the business bank account and issued herself common stock. Consider the following

    asked by Anonymous
  35. math

    An electrician cuts a 26ft piece of wire into two pieces. One piece is 4ft longer than the other. How long are the pieces? What is the length of the shorter piece?__ft

    asked by Kelly
  36. math

    The sum of the measures of the angles of any triangle is 180 degrees. In triangle abc, angles a and b have the same measure, while the measure of angle c is 78 degrees larger than each of a and b. What are the measures of the three angles? angle a is

    asked by Kelly
  37. math

    Write the ratio as a fraction in lowest terms. compare in inches. 3ft to 31 inches. The ratio is__.

    asked by Kelly
  38. Computers

    If a floptical disk doesn't have a write-protection notch, how is write-protection accomplished?

    asked by lilith
  39. physics

    A certain car is capable of accelerating at a rate of + 0.80 m/s2. How long does it take for this car to go from a speed of 15 mi/h to a speed of 75 mi/h?

    asked by Tamera
  40. Math

    Two particles X and Y joined by a rigit rod of negligible mass, move along a smooth horizontal plane. Particle X has mass 7.7kg and is pushed by an external force Fx of magnitude 73.01N. Particle Y has mass 5.68kg and is pulled along the plane by an

    asked by Anonymous
  41. college physics

    in a pinball machine, a force of 24 N is used to compress a spring a distance of 0.080m. a. What is the potential energy stored in the spring? b. What is the maximum speed tha it van produve in a ball of mass 0.15kg?

    asked by Mariam
  42. chemistry 104

    if a person uses 670 kcal on a long walk, calculate the energy used for the walk in kiljoules

    asked by Anonymous
  43. Chemistry

    Suppose you have two 100- graduated cylinders. In each cylinder there is 37.0 of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 1.2 on each side.After you carefully lower each cube into the water of its own

    asked by Hailey
  44. chemistry

    what volume of water should be added to 300ml of HNO3 0.25M to obtain HNO3 0.2M?

    asked by gaby
  45. economics

    You have been hired by a local used car dealer to help in their pricing of used cars. (Hey, it’s temporary thing, just to help you earn some extra cash.) They want to know whether the prices of the cars they sell are more influenced by the age of the car

    asked by Rey
  46. math

    A pipe is 42 inches long. It is to be cut into three pieces such that the longest is four times as long as the shortest and the middle-size piece is six inches longer than the shortest. How long is the middle-sized piece?

    asked by Anonymous
  47. algebra

    If you could please help show me the steps so i can continue on with my assignment i would be very appreciative: Problem 9 - p/4 = 5

    asked by May
  48. Math

    Any help would be appreciated! What is 38.896/5.1 + 509.15 to the correct number of significant figures? 516.78 What is (154+8446.1)/54 to the correct number of significant figures? 159.261 Thanks!

    asked by l
  49. Math

    Odd number between 411 and 423 with sum of 12

    asked by Angel
  50. algebra

    Could someone please check my work. what is the slope of the line that passes through the given points?(2,12( and (6,11) -1/4 (my choice) 1/4 4 -4 My work: 11-12/6-2=-1/4 what is the slope of the line that passes through the given points? undefined( my

    asked by brandon
  51. law/421

    what challenges to you face in protecting your intellectual property for any state based business? then how does that change for a nationally based business? then how does that change for an international business?

    asked by at
  52. Physics

    To make a large-scale representation of a hydrogen atom in its ground state, you start with a super ball (D=4.00 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron? R=____km

    asked by Natalie Delgado
  53. physics

    4. A rat named Littleguy runs in a treadmill (a wire wheel) with a diameter d =8.00 inches. In 5.00 minutes, Littleguy makes the treadmill rotate 2.80 x 10² times. If the rat were running along the ground, how far would he have run? What was his average

    asked by Arthur
  54. physics

    A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive x-axis. What is the initial velocity in the x-direction? Two sigfigs Remember...no units...but it would be in m/s

    asked by mark
  55. health

    While taking medications, people with HIV ________. A. Can transmit HIV infection to others through unprotected sex B. Cannot transmit HIV to others through unprotected sex C. Cannot transmit HIV to others through needle sharing D. All of the above

    asked by Anonymous
  56. Geometry

    In the triangle ABC, the measure of angle A=(5x+3)degrees, the measure of angle B=(8x-2)degrees, and the measure of angle C=(5x-1) degrees. Find the measure of each angle.

    asked by Shelby
  57. math

    Jose lives on the side of a mountain and the elevation of his residence is 1145 feet above sea level. His brother lives in a deep valley the is 20 feet below seal level. What is the difference in altitudes of the locations occupied by the two brothers?

    asked by Anonymous
  58. algebra

    I don't understand this question How would you explain to your friend why the quotient of x*6 and x^2 is x^6 Remember your friend is questioning the rule, so you just cannot say it is the rule.

    asked by logan
  59. Calculus

    Hello, I just wanted to verify if my work was good. Calculate the following integral by parts: ∫ upper limit is 1/5 and lower limit is 1/10. of 10sin^-1 (5x)dx so first I named the variables: u = 10 sin^-1 (5x) du = 50 / sqr(1-25x^2) dv = dx v = x so we

    asked by Robert
  60. physics

    A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive x-axis. What is the initial velocity in the y-direction? Two sigfigs Remember...no units...but it would be in m/s

    asked by mark
  61. physics

    A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive x-axis. What is the velocity of the ball at its maximum height?

    asked by mark
  62. math

    Show that ( a1/3 - b1/3) ( a2/3 +a1/3 * b1/3 + b2/3 )?

    asked by TUHITUHI
  63. physics

    which natural phenomenon can describe light as a wave?

    asked by Andrea
  64. Math/Excel

    I'm not sure what two excel functions to use that will give the correct answer and how to copy the information to each cell and the values stay the same. 2. A home loan is to be repaid by a series of equal monthly payments over many years. Prepare a

    asked by Angie
  65. DBM 381

    Create a detailed ERD using the Entities and Attributes document provided with the Service Request. Create a Microsoft® Access® database using the ERD created above. You do not need to include keys and relationships at this point. Include the following:

    asked by Minnie
  66. 7th Grade Help

    what is the largest cause of weathering and erosion? weathering water sand trees

    asked by completeidiot
  67. math/Finance

    Sheila Spinney borrowed $32,500 at 7.5% simple interest for 180 days on January 7. The bank later sold the note at an 8% discount on March 2. Find the proceeds to the bank. I do not know what formula to use.

    asked by Janine
  68. Chemistry

    I am doing a experiment with ice and i have to discuss the accuracy and precise of an uncertainy measure. How to express that answer.

    asked by Barb
  69. CHEMISTRY

    What is the energy of a photon with a frequency of 3.5 X 10ˆ15 sˆ-1 in J/photon? In J/mol?

    asked by Kimberly
  70. algebra

    f(x)= 1/x-2 Plug in 1 for x. I keep getting -1 but the book says the answer is 3. Please help. Thanks

    asked by Molly
  71. Science conversions

    How do I convert 2.3 J/proton to J/mol?

    asked by Kimberly
  72. Theory to Practice

    Which of the following is an obstacle to learning for a beginning learner? A.Knowledge of what elements of the movement to focus on B. Chronic indifference characteristic between birth and age three C. Shorter time to monitor perceptual input from the

    asked by mary
  73. physics

    To make a large-scale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.74 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?

    asked by arcos15
  74. physics

    To make a large-scale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.74 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?

    asked by arcos15
  75. Physics

    To make a large-scale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.78 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?

    asked by serin130
  76. Science

    To make a large-scale representation of a hydrogen atom in its ground state, you start with a super ball (D=3.78 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron?

    asked by phylh
  77. Science

    In a tidal barrage scheme, the area of sea-water behind the barrage is 30km^2, tidal depth is 10m and the density of sea water is 1030kgm^-3. a. What energy is possible available from this scheme in one cycle of ebb and flow???

    asked by Mariam
  78. math

    Laura insured her car for $12,000. When it was damaged she got $8,000 from the insurance company. What percentage of the insured amount did Laura get

    asked by caqthy
  79. physics

    A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive x-axis. After flying through the air, the ball lands with a velocity of m/s at an angle of degrees above the x-axis

    asked by mark
  80. college algebra

    How do you solve f(x)=square root of 2x+1 using the difference quotient? I need to see the steps.

    asked by Anonymous
  81. Algebra....HELP!!

    Solve the elimination method 7a + 6b = 3 -7a +b = 25 The solution of the system is?

    asked by Theresa
  82. math

    Find the slope of the line that passes through the pair of points. (If the slope of the line is undefined, enter UNDEFINED.) (-f + 6, m - 6) and (f + 6, -m)

    asked by Honey
  83. earth science

    What are 10 facts about hurricane Isaac?

    asked by jamie
  84. ALGEBRA 2

    What is the slope of the line that passes through the given points? (6, 2) and (7, 4)

    asked by nay
  85. Diff Eq

    If y(t)=3e^(t^2)is known to be the solution of the initial value problem y'+p(t)y=0, y(0)=y_0, what must the function p(t) and the constant y_0 be?

    asked by Joe
  86. math

    What are the step to help solve for 5r+30/20= 3r-36/3

    asked by Kelly
  87. physiology/ anatomy

    I'm doing a lab about osmosis/ diffusion. We put a 2 molar solution of NaCl into a dialysis bag and submerse the bag in water, weighing the bag after 15 minute increments for an hour. I need help explaining why the weight of the bag would fluctuate (EX. 6

    asked by kira
  88. geometry

    Given letters gb and gf how do you write a mathematical to compare their measures?

    asked by Brittany
  89. Biology

    characteristics of life

    asked by Anonymous
  90. history

    I need help with six dialouge questions for jesus or abraham would anyone help me please its due monday? Example: Budda,what would you say is the most notable difference between Buddism and Hinduism?

    asked by ashley
  91. Physical Science

    find the potential energy of a 3kg block that is on a roof top 10m above the floor.

    asked by Anonymous
  92. SCIENCE

    When you drop a bowling ball & a tennis ball they hit the floor at the same time but when they hit the floor they have the same what? A. speed B. force C. momentum D. all of the above. I think it is D but I can't find anywhere what they have the same.

    asked by SUE
  93. Spelling

    What spelling pattern is in long a and long I words?

    asked by Tami
  94. mr sus

    In studying, reading, and listening, using the information you have learned in some way is important because:

    asked by hk
  95. Math

    What's the Rule Input Output 0 1 1 3 2 7 3 11 4 15 What's the rule? o 5 1 13 2 21 3 29 4 37

    asked by DeWayne
  96. Math

    Let p>q>0 with p+q = 1 and a = q/p < 1. Let X_n denote the random walk with transitions X_{n+1} = CASE 1: X_n + 1 with probability p and CASE 2: X_n - 1 with probability q. For i ≥ 0, we set u_i = P(X_n = 0 for some n ≥ 0|X_0 = i). Give the

    asked by W
  97. chemistry

    Can someone help me to check my answer and the way I solve this problem is right or wrong? Determine the energy required to turn a Na metal atom into a gas phase ion (Na+ (g)). Ionization energy of Na(g) 499 kJ/mol Electron affinity of O(g)for2e- 603

    asked by Jenny
  98. sceienc

    how to draw use case for hospital management

    asked by meme
  99. Math

    If x = xo and x = x1 are both vector solution of Ax=b, then x1 - xo is in the Null Space of A. True or False?

    asked by Anonymous
  100. math

    If planet I is 31.8 million miles from the sun than planet II, then planet III is 25.6 million miles father from the sun than planet I. When the total of the distances for these three planets from the sun is 200.2 million miles, how far away from the sun

    asked by Kelly
  101. math

    Find an equation of the vertical line that passes through (23, 6).

    asked by Honey
  102. math

    two numbers the exact answer is between 6*7381

    asked by kaylene
  103. ACCT

    ow are intangible assets handled on a typical corporate tax return? Are they "amortized" in the same manner? If it is different, why do you think it is that way?

    asked by CHASE
  104. science

    Lithium fluoride has a Ksp of 1.84 x 10-3. If 1.5 g are dissolved, what will be the percent ionization?

    asked by anna
  105. Comunication Skills

    You speakers of Castilian Spanish and Cantonese Chinese may be especially vulnerable to environmental influences in the mainstream classroom because of their: A. oral traditions b. linguistic environments c. cultural histor d. dialectal dominance

    asked by Monique
  106. Algebra 2

    solve the equation : 5x-2(3-x)=-(4-x) show how you got the answer!!!

    asked by Shaka
  107. math

    If 5 sweaters cost $39.40, how much would 8 sweaters cost? The cost is $__.

    asked by Kelly