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Tammy

Questions and answers by visitors named Tammy

Questions

  1. A wheel with rotational inertia I is mounted on a fixed, fricitonless axle. The angular speed w of the wheel is inccreased from zero to w_f in a time interval T.

    1: What is the average net torque on the wheel during the time interval, T? a) w_f/T b)w_f/T^2

  2. An ideal massless spring is fixed to the wall at one end. A block of mass M attached to the other end of the spring oscillates with amplitude A on a frictionless, horizontal surface. The maximum speed of the block is V_m. The force constant of the spring

  3. Emily spent 1/2 of her money at the grocery store. Then, she spent 1/2 of what was left at the baker. Next she spent 1/2 of what was left on a cd. She spent the remaining $6.00 on lunch. How much money did she start with ?

  4. When a block slides a certain distance down an incline the work done by gravity is 300 J. What is the work done by gravity if this block slides the same distance up the incline?

    a) 300 J b) zero c) -300 J d) It cannot be determined without knowing the

  6. A spring has a force constant of 100N/m and an unstretched lenght of .07 m. One end is attached to a post that is free to rotate in the center of a smooth table. The other end is attatched to a 1 kg disc moving in uniform circular motion on the table,

  7. The denominator of a fraction is 3 more than twice the numerator. If both the numerator and denominator are decreased by 7 and the simplified result is 7/19 find the original fraction

  8. benzopinacol and benzopinacolone diferences

    Because benzopinacol and benzopinacolone have nearly identical melting points, describe (without using spectroscopic methods) how you might prove that samples of the two compounds are different.

  9. What are two reasons why the crude product in most reactions is not pure?

  11. A bike wheel rotates uniformly through 2 revolutions in 3 seconds.

    a) what is the period of the wheel's rotation? T=3rev/2s=1.5s b) what is the frequency of the wheel's rotation? (in Hertz) f=1/T =1/1.5 =.666Hz c) what is the angular speed of the

  12. Xavier can swim at a constant speed of 5/3 meters/second. What is tge ratio of meters to the number of seconds?

  13. How you can quickly calculate the mean of the following test scores without adding the numbers.

    76,73,78,75

  14. What did the baby buzzard say when it saw

    an orange in the nest I got misspelled jumbo

  16. consider the reaction at 298K. 2H2S(eq) + SO2-----3S(s) + 2H2O (g). Calculate Grxn under these conditions. PH2S=2atm Pso2 =1.5 atm PH2O + 0.01atm

  17. You are given the choice of $4,000 in extra taxable income per year or a tax-exempt medical policy. The medical policy costs $300 per month. Your tax rate is 25%. Considering financial factors only, should you take the cash or the medical policy?

  18. Marlon has 4 baseball cards, Jake has 4 baseball cards and Sam has 3 baseball cards. Can you write a multiplication sentence to find how many baseball cards they have altogether? Explain.

  19. I'm trying to double check my answers. These are the answers I believe to be correct. Please let me know if I am right or wrong. Thank you.

    . Networking has (Points : 1) a) Increased in importance b) Rely upon electronic communication c) Rely upon personal

  21. How many carbon atoms are there in a diamond (pure carbon) with a mass of 50 ?

  22. When BaCl2-H2O (s) is dried in an oven, it loses gaseious water:

    BaCl2-H2O <--> BaCl2(s) + H2O (g) enthalpy change - 63.11 kJ/mol at 25 degrees C entropy change - +148 J/(K-mol) at 25 degrees C Calculate the vapor pressure of gaseous H2O above BaCl2-H2O at

  23. A railroad flatcar of weight W can roll without friction along astraight horizontal track. Initially, a man of weight w is standing on the car, which is moving to the right with speed v_0. What is the change in velocity of the car if the man runs to the

  24. Can the numbers 24, 32, 40 be the lengths of the three sides of a right triangle?

  26. Does anybody else find it odd that 29 of a group of 32 questions below

    were from somebody called "social studies" under the subject heading of "social studies". Sure looks like the bot, or AI whatever it calls itself, is once again generating its own

  27. Wonder why the bot has not answered the last 4 math questions .

  28. "gooddog" has asked 14 questions in the last 16 minutes under the subject

    of "Social Studies", with an immediate reply by the bot. This is not humanly possible. Why have we now resorted to the bot also asking the questions? Testing to see if there are

  29. What is the significance of 42.

  31. Just counted the last 15 math questions below this answered by the bot

    It got 2 of them right. this is inexcusable, fortunately most were corrected by Damon and oobleck.

  32. I have just checked 8 consecutive answers by the bot to your questions

    and they are all wrong.

  33. I am going to take a break

    It is very hard to keep up with correcting all the wrong answers the bot is giving for these simple math questions. Please somebody else take over, I'm going to bed , it's about 2:30 am here in Brisbane.

  34. In a recent year, 17.7% of all registered doctors were female. If there were 59,400 female registered doctors that year, what was the total number of registered doctors?

  36. A man whose mass is 10kg stands on a spring weighing machine inside an elevator.what's the reading of the weighing machine when the elevator starts to ascend with an acceleration 2m\s

  37. A home theater system uses two units of electricity in three hours .How many units will it use in 9 hours ?Give your answer to the nearest whole number

  38. 2 * 4 / 2 +3 = 10

  39. Weight(n)=mass (kg)*gravity(m/s^2)

    Nolan pushes a 500 kg wheelbarrow.What is the weight of the wheelbarrow? A.After he dumps the wheelbarrow,it weighs only 200 N.What its mass?

  41. random sample of size 36 is taken from a population with mean 50 and standard deviation 5. Find P( x¯ < 51.5).

  42. Suppose an essay requires the use of five scholarly articles but the body paragraphs must be discussed in the form of a literature review, can someone explain how this would be done?

    Do I just discuss the articles that I will be using for the research

  43. A bullet of mass m=0.05kg embeds itself in a block of mass M=1.2kg, which attached to a spring of force constant k=245N/m. If the initial speed of the bullet v0=1.32m/s, find the maximum compression of the spring

  44. A stream of water exits from the bottom of a can and lands in a second can. The top of the second can is 0.50m below the hole in the first can, which has water in it to a depth of 0.150m. Find the distance D.

  46. A 0.500kg block of metal with an initial temperature of 30 degrees C is dropped into a container holding 1.12kg of water at 20.0 degrees C. If the final temperature of the block-water system is 20.4 degrees C, what is the specific heat of the metal? Assume

  47. Water discharges from a horizontal, cylindrical pipe at the rate of 5.00x10^-3 m^3/s. At a point in the pipe where the cross-section is 1.000x10^-3 m^2, the absolute pressure is 1.60x10^5 Pa. What is the pipe radius at a constriction if the pressure there

  48. A block with mass of 5.0kg is suspended from an ideal spring having negligible mass and stretches the spring 0.20m to its equilibrium position.

    A) What is the force constant of the spring? B) The spring is then stretched 0.80m from its equilibrium position

  49. Two chunks of ice are sliding on a frictionless frozen pond. Chunk A, with a mass ma= 5.0 kg, moves with initial velocity va1= 2.0 m/s parallel to the x-axis. It collides with chunk b, which has a mass mb= 3.0 kg and is initially at rest. After the

  51. A baseball is thrown from the rood of a 27.5m tall building with an initial velocity of magnitude 16.0m/s and directed at an angle of 37 degrees above the horizontal.

    A) Using energy methods and ignoring air resistance, calculate the speed of the ball just

  52. If 20% of the individuals in a population have sickle-cell anemia, according to the Hardy Weinberg equation, what proportion of the population should be sickle-cell carriers?

  53. Por or Para

    Tiene que terminar este proyecto (para) manana. Salio de la oficina (por) su casa. Are these sentences correct? Thanks

  54. What is the relationship between the point (4,7) and the vector (4,7)? Illustrate with a sketch.

  55. The line for the dunking machine was twice as long as the cake walk line. The line for the cake walk was half the length of the line for the hoop shoot. If there were 18 people in line for the hoop shoot, how many people were in the line for the dunking

  56. I need help solving systems using elimination 3 * -3y equals - 3 2x minus y equals -5 how do I do this do not know algebra

  57. What volume in liter will be occupied by 162.3 g of carbon monoxide at 273k and 760 torr?

  58. On a map scale is shown is 1 inch equals 5 miles. If an island is 2.5 in.² on the map what is the actual area of the island

  59. A ball is thrown straight up at 13.0 m/s near the edge of a 30.0-meter high cliff. The ball lands at the bottom of the cliff. a) What is the acceleration of the ball just after it is thrown (magnitude and direction)? b) What is the acceleration of the ball

  60. Human blood contains glucose at a typical concentration of 0.100% (W/V). At this concentration, how many grams of glucose would be found in one liter of human blood?

  61. Fred has 3 times as many dimes as quarters. How many dimes does he have if the value of all the coins is $3.85?

  62. Write the ionic equation for dissolution and the Ksp expression for PbC12.

  63. Let f(x)= -3x+4 and g(x)= -x^2 +4x+1. Find and simplify

    g(k)

  64. Give an example of a function from everyday life.(fill in blanks):______ depends on_____, so _____is a function of _______.

  65. Simplify each expression.

    Sqrt of 128m^3n^5/sqrt of 81mn^7

  66. Among the solubility rules previously discussed is the statement: Carbonates, phosphates, borates, and arsenates—except those of the ammonium ion and the alkali metals—are insoluble.

    (a) Write the expression for the equilibrium constant for the reaction

  67. If driving 50 mph how fast would the person 1 mile behind them have drive to catch up with them

  68. I have a rebus puzzle it says THRU in bold print and AND in regular print

    THRU AND PLEASE HELP! !

  69. Write the equation for the reaction of iron and oxygen.

    Label the oxidizing reagent, the reducing agent, the reduced element, and the oxidized element.

  70. The midpoint of the line segment from P1 to P2 is (-1,3) if P1 is (-5,2) what is P2

  71. Write the formula for the total cost of renting a full-sized car when the unlimited mileage charge is added.

  72. In the production of carbon disulfide (CS2), carbon (C) and sulfur dioxide (SO2) are reacted. If 8.00 g of sulfur dioxide reacts, how many moles of carbon dioxide are produced?

  73. A 20 foot piece of rope will be cut into as many 3 and 1\2 foot section as possible. how much rope will be left over?

  74. How many joules of heat are removed to completely covert 70.0 grams of water to ice at zero Celcius?

  75. How many moles of gas must be forced into a 5.0 L tire to give it a gauge pressure of 33.6 psi at 28 ∘C? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.8 psi so that the total pressure in the tire is 48.4

  76. 50 lbs of oats @$2 a pound

    = how much

  77. how to write a balanced equation for the following reactions with amounts of released or absorbed heat expressed in numbers within the equation 1 mole of methane with O2 yields CO2 and H2O and releases 213 kcal of heat

  78. what is the altitude which you'll find 99% of the atmosphere's mass? Assume P=1 atm, atmosphere T=290 K and the atmosphere is mostly N2.

  79. 1/b (2b-10)=17

  80. My math calculator prompted me with this question 6E-7.

    My answer to this question is 0.00000007

  81. I'm doing a lab for Le Chatelier's Principle. I'm concerned that all my answers sound very similar. Can someone help me and let me know if my answers are making sense?

    ~Thanks 1.) How is the reaction Zn(OH)2 <=> Zn^+2 + 2OH- affected by adding OH- I think

  82. A newspaper carrier has %5.75 in change. He has ten more quarters than dimes but two times as many nickles as quarters. how many coins of each type does he have?

  83. Compute Brianna's estimated tax payment for the third quarter. She is self-employed and she expects to earn $84,400 this year. Her estimated income tax rate is 22%. For self-employed persons, social security tax is 12.4% of wages up to $106,800, and

  84. Using the dating method, calculate the discount date and the net date. Unless otherwise specified, the net date is 20 days after the discount date: The date of invoice is April 6th, Terms of sale is 2/10, EOM. What is the Discount date? What is the Net

  85. jody has a rectangular piece of fabric 7/8 yard long and 4/5 yard wide. What is the area of the piece of fabric

  86. When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced.

    CaCO3(s)+2HCl(aq)=CaCl2(aq)+H2O(l)+CO2(g) How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate are combined with

  87. Given the following chemical equation, determine how many grams of N2 are produced by 8.58 g of H2O2 and 5.62 g of N2H4.

    2H2O2(l)+N2H4(l)=4H2O(g)+N2(g)

  88. Explain how a defendant may be processed through The Missouri judicial system.

    I have searched the internet and I can not information on this.

  89. •When should a status offense become a delinquent act?

  90. In October, a HARDWARE STORE purchased snow shovels for $8 each. The original markup was 50% based on the selling price. In December, the store had a sale and marked down the shovels by 20%. By January 1, the sale was over and the shovels were marked up

  91. The height of a certain species of a tree are normally distributed with a mean of 30ft and stand dev of 4ft. If a random sample of 16 of these trees is taken, what is the probability that the sample mean is less than 32fy?

  92. how many mL of 1M HCL is used to make:

    100mL of 0.1M hcl 250Ml OF 0.5M hcl 10Ml OF 0.01m hcl

  93. List five numbers for which the sample mean is 30 and not all numbers are equal and would have a mean of 30 but all numbers are equal

  94. Solve the compound inequality graph solution 6x-4<-34 or3x+10>10

  95. Solve the inequality graph solution 5r+4<5

  96. Solve the equation or formula for the indicated variable S=5rTf foRT answers are T=s/5-r,, T=25r/s,, T=r2-5s,, T=s/5r2

  97. Need Help Writing he body of my essay. approximately 550 to 750 words

  98. In a respresentative study,a sample of n = 100 adolescents with a history of group participation is given a standardized self-esteem questionnaire. For the general po;ulation of adolescents, scores on this questionnaire form a normal distribution with a

  99. How does the phrase "send the base to the basement". refer to the change of base formula?

  100. Which of the following was Eisenhower's most significant legislative achievement?

    A. The Highway Act of 1956 B. The establishment of modern Republicanism C. The extension of Social Security benefits D. Increasing the minimum wage

  101. A radio-controlled car increases its kinetic energy from 8 J to 10 J over a distance of 6 m. What was the average net force on the car during this interval?

  102. A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.8 N acts on it for a distance of 0.5 m?

  103. What is the kinetic energy of a 1100 kg sports car traveling down the road with a speed of 22 m/s?

  104. A man travels 7km due north,then 10km due east.find the resultant displacement.

  105. A man built a house costing 9 times as much as the lot on which it was built. If the lot cost $5, 000 less than 1/6 the cost of the house, what was the cost of each?

  106. The length of the shadow of a building is 2 feet more than 2/3 the height of the building and it is also 12 feet less than the height. How high is the building?

  107. A basketball team won 16 games, or 4 less than

    2/3 of the games they played. Find the number of games they played.

  108. The cost, y, of renting a canoe can be shown by y+12x + 30 where x is the time in hours. Identify the y intercept as an ordered pair and explain what it means in terms of the problem.

  109. You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 5 and a population standard deviation 2 and a sample size of 4. Machine 2 has a sample mean of 10 and a population standard deviation of 2 with a

  110. You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 15 and a sample standard deviation 6 and a sample size of 18. Machine 2 has a sample mean of 12 and a sample standard deviation of 6 with a

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