Emily

Questions and answers by visitors named Emily

Questions

  1. Why did Quakers and other religious leaders in the North oppose slavery?

    A. They believed it was a sin for one person to own another person. B. They had many African American followers. C. They felt African Americans should be fairly paid for their

  2. How were the lives of children in the middle of the nineteenth century different from previous generations?

    A. They were working in factories or fields. B. They were children of professional parents. C. They were given the opportunity to go to college. D.

  3. What is the biggest volcano in the solar system called?

  4. Which of the following is the best example of how many Pacific islands have adapted to a mix of different ethnic groups?

    A.They have developed national pidgin languages.*** B.They have populations where immigrants make up the majority. C.They practice

  5. A baseball is thrown upwards from a height of 2 meters with an initial velocity of 10 meters per second. Use the fact that -9.8 meters per second squared is constant acceleration due to gravity to answer the following:

    The maximum height of the ball The

  6. A bag contains 6 red marbles, 3 white marbles, and 7 blue marbles. You pick a marble without looking. Find the probability of drawing a white marble.

    Can someone please explain how I would work this out?

  7. As the country has grown and evolved, so too has the Executive Office of the President and the independent agencies. Give FOUR specific examples demonstrating how the evolution of the executive branch has mirrored the evolution of the nation. Include at

  8. A sample of argon gas at STP occupies 56.2 liters. Find the number of moles of argon and the mass in the sample

  9. Given f(x)=2x^2-1, determine the equation of the inverse.

  10. Figure out the 35th derivative for xsinx. You have to do a few derivatives by hand to figure our a pattern and then predict the 35th one

  11. "How many grams of NH3 can be produced from the reaction of 28 g of N2 and 25 g of H2?

    N2 + 3H2 ---> 2NH3 ==> 28 g N2 x (1 mol N2/14.0 g N2) x (2 mol NH3/1 mol N2) x ( 17.0 g NH3/ 1 mol NH3) = 68 g NH3 25 g H2 x ( 1mol H2/2.0 g H2) x (2 mol NH3/3 mol H2) x

  12. Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/s in 2.0 s.

    What is the net force acting on the body?

  13. A 0.294-kg box is placed in contact with a spring of stiffness 3.792×102 N/m. The spring is compressed 1.42×10-1 m from its unstrained length. The spring is then released, the block slides across a frictionless tabletop, and it flies through the air. The

  14. A University of Rochester student decided to depart from Earth after his graduation to find work on Mars. Before building a shuttle, he conducted careful calculations. A model for the velocity of the shuttle, from liftoff at t = 0 s until the solid rocket

  15. The brakes of a truck cause it to slow down by applying a retarding force of 8740 N to the truck over a distance of 1130 m. What is the work done by this force on the truck?

  16. "Buy a Match 6 lottery ticket every day until you win the lottery. (In a Match 6 lottery, a player chooses 6 different numbers from the set {1, 2, 3, ..., 44}. A lottery representative draws 6 different numbers from this set. To win, the player must match

  17. Determine the equation of the parabola with roots 2+sqrt(3) and 2-sqrt(3), and passing through the point (2,5).

  18. A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. An industrial tank of this shape must have a volume of 1600 cubic feet. The hemispherical ends cost twice as much per square foot of surface area as the sides. Find

  19. Below are the functions of y=|x| and y=|x|-5. how are the functions related?

    A. the functions have the same shape. the y-intercept of y=|x| is 0 and the y-intercept of the second function is 5 B. the functions have the same y-intercept. the second function

  20. A particle hangs from a spring and oscillates with a period of 0.2 s.If the mass-spring system remained at rest,

    by how much would the mass stretch it from its normal equilibrium position? The acceleration of gravity is 9.8 m/s^2

  21. An automobile fuel tank is filled to the brim with 45.3 liters (12.1 gallon) of gasoline at 14.5 degrees C. Immediately afterward, the vehicle is parked in the Sun, where the temperature is 34.5 degrees C. How much gasoline (in Liter) overflows from the

  22. A pencil cup with a capacity of 25π in.3 is to be constructed in the shape of a right circular cylinder with an open top. If the material for the side costs 5/8 of the cost of the material for the base, what dimensions should the cup have to minimize the

  23. Q. A farmers in Alberta often deliver wheat to grain elevators using grain truck, which are a type of dump truck.

    A farmer make two trips to a grain elevator. The grain elevator manager measures the combined mass of the farmer's truck and wheat in tonnes

  24. A steel wire in a piano has a length of 0.5000 m and a mass of 3.800 10-3 kg. To what tension must this wire be stretched in order that the fundamental vibration correspond to middle C (fC = 261.6 Hz on the chromatic musical scale)?

  25. In scuba diving, a regulator is used so that the pressure of the air the diver breathes is close to that of the ambient water. A reckless swimmer decides to use a hose sticking out of the surface to breathe underwater while diving in a lake. When the air

  26. a 75 kg person escapes from a burning building by jumping from a window 30 m above a catching net. Acceleration due to gravity is 9.81 m/s^2. Assuming air resistance is simply a constant 96 N force on the person during the fall, determine the person's

  27. Given any right triangle with an acute angle theta, a) Explain why csc theta is always greater than or equal to 1

    b) Explain why cos theta is always less than or equal to 1

  28. An engineer is designing a parabolic arch. The arch must be 15 m high, and 6 m wide at a height of 8 m. a) Determine a quadratic function that satisfies these conditions.

    I've got : 8=a(6-h)^2+15, but i don't know what to do next.

  29. What is B if the graph of the equation 3x=By+2 is perpendicular to the graph of 3y=-2x+4

  30. A cook needs 5 cups of vegetable stock for a soup recipe. How much is this in pints?

    Write your answer as a whole number or a mixed number in simplest form. Include the correct unit in your answer. And the units are, fl oz, C, pt, qt, gal. And you can write

  31. How many milliliters of .100 M HNO3 are needed to neutralize 58.5 mL of .0100 Al(0H)3?

  32. The camera club has 5 members, and the math club has 8 members. There is only one member common to both clubs. In how many ways could a committee of 4 people be formed with at least 1 member from each group?

  33. If log 3=A and log 5=B express

    Log 75 in terms of A and B. (using the Law of Exponents)

  34. "The fourth act opens and ends with Bottom at center stage. What is your opinion of Bottom's character? How might he be the antithesis, or opposite, of Theseus's character?"

    Does anyone know how to answer the last part of the question? I didn't even realize

  35. A gambler offers to let you play the following game: he will roll two (fair) dice. If the sum of the two dice is 7, you will lose $8. If the sum of the two dice is 2, you will lose $7. For any other roll, you will win $4. What is the expected value of this

  36. Points J and K, plotted on the coordinate grid, are two vertices of rectangle JKLM. Rectangle JKLM has an area of 7 square units. Point J is located at (2, 1) and point K is located at (-5,1) each vertex of the rectangle is located at a point that has

  37. at the moment when a shot putter releases a 4kg shot the shot is 1.25 m above the ground and travelling at 7 m/s. it reaches a maxium height of 3.7 m above the ground and then falls to the ground. air resistance is negligible and the shot goes straight up

  38. A lighthouse with a rotating beam is located 500m south of a coastal cliff that runs west to east

    a) determine a relation for the distance from the lighthouse to the point the light strikes the cliff in terms of the angle of rotation x b) determine an exact

  39. The titration of 25.0 mL of an iron(II) solution required 18.0 mL of a 0.265 M solution of dichromate to reach the equivalence point. What is the molarity of the iron(II) solution?

  40. A ladder reaches a height of 16 feet on a wall. If the bottom of the ladder is placed 4 feet away from the wall, what is the slope of the ladde as a positive number?

  41. Why Olympia selected to hold at the ancient Olympic Games?

  42. Find the 6th term of the geometric sequence whose common ratio is 1/3 and whose first term is 7.

  43. Light with a wavelength of 405 nm fell on a strontium surface, and electrons were ejected. If the speed of an ejected electron is 3.49 105 m/s, what energy was expended in removing the electron from the metal? Express the answer in joules (per electron)

  44. Ali did his homework at school with a graphing calculator. He determined that the equation of the line of best fit for some data was y=2.63x-1.29. Once he got home, he realized he had mixed up the independent and dependent variables. Write the correct

  45. If f(x)=x^2-6x+14 and g(x)=-x^2-20x-k, determine the value of k so that there is exactly one point of intersection between the two parabolas.

  46. Is the word 'maths' masculine or feminine?

  47. A buoy oscillates in simple harmonic motion as waves go by. The buoy moves a total of 3.5 feet from its low point to its high point and it returns to its high point every 10 seconds.

    What is the equation that describes this motion if it reaches its high

  48. what is an equivalent expression for 10x+2 using distributive property

  49. Find the missing length. Round to the nearest tenth of necessary.

    It is a right triangle with side a being 8 ft and side b being 21ft what is the length of the 3rd side? A 441 B 22.5 C 64 D 19.4* Am I right and please explain I am a little confused.

  50. A board 5 feet long slides down a wall. At the instant the bottom end is 4 feet from the wall, the other end is moving down the wall at a rate of 2 feet per second. At the moment, how fast is the bottom end sliding along the ground?

  51. Find the area of the region bounded by the curves y = x^(-1/2), y = x^(–2), y = 1, and y = 3.

    a) (1/2)(3)^1/2 + (4/3) b) 2*(3)^1/2 - (8/3) c) (1/2)(3)^1/2 - (32/3) d) 2*(3)^1/2 - (32/3) e) (8/3) - 2*(3)^1/2 So one thing that is throwing me off on this

  52. The colour of some clothing fades overtime when washed. Suppose a pair of jeansfades by 5% with each washing. To the nearest wash, how many washes would it take so that only 25% of the original colour remains in the jeans?

    1. first term = 2. r = 3. tn = 4.

  53. Piston 1 has a diameter of 0.643 cm.

    Piston 2 has a diameter of 4.59 cm. In the absence of friction, determine the force required on piston 1 necessary to support an object, m, with weight 1151 N. (Neglect the height difference between the bottom of the two

  54. Find all the values of x in the interval [0,2π] that satisfy the equation: 8sin(2x)=8cos(x)

  55. For my DT homework I need to do a health and safety poster on a Pillar Drill. I need to find health and safety facts on a Pillar Drill. Please can you help me.

    Thanks

  56. Determine the stopping distances for an automobile with an initial speed of 95km/h and human reaction time of 1.0s:

    (a) for an acceleration a= -5.2m/s^2 (b) for a= -6.7m/s^2

  57. addition of a strong acid would increase the solubility of which of the following salts

    AgCl CaSO4 CdS CaCO3 PbBr2 CaHPO4 Cd(OH)2 AuCl

  58. Cliff has some money he wants to invest for his retirement. He is offered two options:

    1. 10%/a simple interest 2. 5%/a compounded annually Under what conditions should he choose the first option?

  59. The hypotenuse of,c of right triangle ABC is 7.0 m long. A trigonometric ratio for angle A is given for four different triangles. Which one of these triangles has the greatest area? Justify your decision. a)sec A=1.7105 b)cos A=0.7512 c) csc A=2.2703 d)sin

  60. Can someone check my answers please? Thank you :)

    30. What is Earth's rotational speed at (a) Bangor, Maine (latitude 45 degrees N) and (b) Rio de Janeiro, Brazil (latitude 23 degrees S)? (It's given in the problem also that Earth's rotational speed at the

  61. need help with honors english 9 a forces of nature unit test multiple choice questions

  62. In a set of seven numbers, the average of the first four is 15 and the last three is 8. What us the average of all seven numbers?

  63. An astronaut on the moon throws a baseball upward. The astronaut is 6​ ft, 6 in.​ tall, and the initial velocity of the ball is 50 ft per sec. The height s of the ball in feet is given by the equation ​s=-2.7t^2+50t+6.5, where t is the number of

  64. Why did rogue states become more prominent following the Soviet Union’s collapse?

    I know what a rogue state is but I don't know why it is involved with the Soviet Union and their collapse. I also know that it has something to do with the Cold War. Can you

  65. Determine whether each sequence is arithmetic geometric or neither if the sequence is arithmetic give the common difference if geometric give the common ratio 1. 6,18,54,162, 2. 4,10,16,22 3. 1,1,2,3,5,8 4. 625,125,25,5 5. 5,8,13,21,34

  66. A stained glass window has an area of 900 square inches.

    A. Once a window design is made of rectangular pieces that are 5 inches by 3 inches. How many stained glass pieces are used in the window? B. Another window design is made of square stained glass

  67. A snack mix contains toasted oat cereal, pretzels, and nuts in a ratio of 2:2:1 by mass. What mass of each ingredient is needed to make the following amounts of snack mix? a)330g b)210g c)500g d)750g

  68. In the number 45,569, the 5 in the hundreds place is _________________ the 5 to its left.

  69. CLIMATOLOGIST Each year a tree is alive,it adds a layer of growth,called a tree ring,between its core and its bark. A climatologist measures the width of tree rings of a particular tree for different years:

    YEAR: 1900:1910:1920:1930:1940 Width of

  70. Mr.Adams had a coin collection including only nickels, dimes, and quarters He had twice as many dimes as nickels and half as many quarters as he had nickels. If the total face value of his collection was $300.00, how many quarters did the collection

  71. A pendulum clock can be approximated as a simple pendulum of length 1.03 m and keeps accurate time at a location where g = 9.82 m/s2. In a location where g = 9.77 m/s2, what must be the new length of the pendulum, such that the clock continues to keep

  72. A high-speed sander has a disk 5.70 cm in radius that rotates about its axis at a constant rate of 1120 revolutions per minute.

    a.) Determine the angular speed of the disk in radians per second. b.) Determine the linear speed of a point 2.40 cm from the

  73. what is the amount of orange juice, written as a fraction grater than 1, that is used in the recipe?

    1/2 cup frozen strawberries 1/2 cup frozen peaches 1/4 cup vanilla yogurt 1 1/2 cups orange juice

  74. The one who got away

    h t t p : //imgur . c o m /S4filEB

  75. A rotating uniform-density disk of radius 0.6 m is mounted in the vertical plane. The axle is held up by supports that are not shown, and the disk is free to rotate on the nearly frictionless axle. The disk has mass 5.8 kg. A lump of clay with mass 0.5 kg

  76. Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100°C. The molar heat of vaporization of water is 40.6 kj/mol

  77. Find the speed of a point on the rim of a 24cm diameter fly wheel which is turning at 2800 revolutions per minute. Give your answer in meters per second.

  78. The denominator of a fraction is greater than its numerator by 9. If 7 is subtracted from both its numerator and denominator, the new fraction equals 2/3. What is the original fraction?

  79. An athlete whirls a 6.6 kg hammer tied to

    the end of a 1.2 m chain in a horizontal circle. The hammer moves at the rate of 0.432 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain.

  80. According to the Guinness Book of World

    Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Assume the speed quoted is that of the end of the rod. What is the centripetal

  81. A baseball player uses a pitching machine to

    help him improve his batting average. He places the 43.4 kg machine on a frozen pond. The machine fires a 0.0546 kg baseball horizontally at a speed of 44.8 m/s. What is the magnitude of the recoil velocity of

  82. A bicycle has wheels with a diameter of 0.630 m. It accelerates uniformly and the rate of rotation of its wheels increases from 197 rpm to 300 rpm in a time of 22.5 s. Find the linear acceleration of the bicycle

  83. A 29.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 17.00 m. When she is partway down the slide, at a height h2 of 8.00 m, she is moving at a speed of 6.90 m/s. Calculate the mechanical energy lost due to

  84. How many kilocal are required to increase the temperature of 15.6 g of iron from 122 °C to 355 °C? The specific heat of iron is 0.450 J/g °C

  85. A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 214 m, and the car completes the turn in 40.0 s (Figure shows coordinate plane with point A on -y axis point C on

  86. What are the reasons for the olympic games to be largest of all sporting events?

  87. A baseball is hit at a point of 3 feet above ground at a velocity of 100 feet per second and an angle of 45 degrees. The path of the baseball is h(x)= -0.0032(x-156.25)squared+87, where x and h(x) are measured in feet.

    A. what is the baseball's maximium

  88. Which one of the following lines best illustrates personification?

    A. The fog comes on little cat feet B. She floated graceful as a dove C. Spring is a dream unsung D. A narrow wind complains all day

  89. The height of the tide in a given location on a given day is modelled using the sinusoidal function h(t)=5 sin (30(t-5))+7. a) What time is high tide? What time is low tide?

  90. The point (-8,3) lies on the terminal arm of angle theta in standard position. Determine the primary trigonometric ratios for angle theta and calculate the value of theta to the nearest degree.

    Only the sine ratio was positive, and when I used that to

  91. Cliff has some money he wants to invest for his retirement. He is offered two options:

    1. 10%/a simple interest 2. 5%/a compounded annually

  92. Use the related acute angle to state an equivalent expression:

    a) tan 110 degrees b)sin 350 degrees

  93. Determine the 10th term of the sequence 3, 10, 28, 72, 176... State the general term.

  94. For what values of k does the function f(x)=(k+1)x^2+2kx+k-1 have no zeros? One zero? Two zeros?

  95. Given f(x)=7-2(x-1)^2, x>= 1, determine f inverse (5).

  96. A small steel ball bearing with a mass of 28.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.25 m. Calculate the horizontal distance the ball would travel if the same spring

  97. If the measure of angle 1 is 123 degrees, find the measure of <2, <3, <4,<5, <6, <7, <8

  98. What is the apparent size of an object 1 cm long held 80 cm from your eyes?

    ==> When they say "apparent size", they mean the angle from which one object is viewed by, say, a person (or in this case a pair of eyes). I thought I'd be able to find the angle by

  99. I need help identifying verbs in a passive and active voice.

    1. Masai, a people of East Africa, live in kraals, or small villages. (Verb=live, A) 2. The village is surrounded by a thick round fence. (verb=is surrounded, P) 3. The kraal contains about 10 to

  100. When it is 10:00, the hour hand on an analog clock is 300 degrees ahead of the minute hand. How many minutes elapse (to three significant digits) before the minute hand next points in the same direction as the hour hand?

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