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  1. Science- physics

    An iron anchor weighs 250 pounds in air and has a weight density of 480 lbs/ft3. If it is immersed in sea water that has a weight density of 64 lbs/ft3, how much force would be required to lift it while immersed? I know the answer is 217 pounds but I need

  2. Probability

    A salesperson contacts eight potential customers per day. From past experience, we know that the probability of a potentail customer making a purchase is 0.10. a) What is the probability the salesperson will make at least two sales in a day? -Do you use

  3. chemistry

    What is the balanced formula for Solid iron 3 oxide reacts with hydrogen gas to form solid iron and liquid water?

  5. physics

    To stretch a certain spring by 2.00 cm from its equilibrium position requires 9.50 J of work. a. What is the force constant of this spring? b. What was the maximum force required to stretch it by that distance?

  6. Science

    We know that this block is in vertical equilibrium, so ΣFup=ΣFdown . Based on the figure above and using the quantities indicated in this figure, please specify the expressions for ΣFup and ΣFdown : Explicitly indicate multiplication with a * symbol.

  7. science

    Four students were studying acceleration in Science class. Each student wrote down a statement about acceleration. The students statements are below. Student 1 When the velocity of an object changes, the object is accelerating. Student 2 Acceleration

  8. Math

    Solving Linear Equations Unit Test A) Are the steps to solve the equation 3y−4=29 for y the same as solving the equation −4z+3=−21? Explain.(1 point) -The steps are not the same. To solve for y, add 4 to both sides, and then multiply both sides by 3.

  10. chemistry

    Given reaction 2NH3(g) + 3Cl2(g) → N2(g) + 6HCl(g), you react 5.0 L of NH3 with 5.0 L of Cl2 measured at the same conditions in a closed container. Calculate the ratio of pressures in the container (Pfinal/Pinitial). 0.75 1.00 1.50 1.33 None of these

  11. geometry

    Points $F$, $E$, and $D$ are on the sides $\overline{AB}$, $\overline{AC}$, and $\overline{BC}$, respectively, of right $\triangle ABC$ such that $AFDE$ is a square. If $AB = 12$ and $AC = 8$, then what is $AF$?

  12. physics

    a string is wound a wheel of radius 20cm. how large is the angle through which the wheel must turn to unwind 30cm of the string.

  13. college algebra help******

    You intercepted the following message from Boris and Natasha. 25 19 19 30 41 17 15 26 27 41 15 28 18 41 18 29 41 34 22 19 41 27 15 34 22 You do not now the encoding or decoding function but from previous work with Boris and Natasha you know their encoding

  15. English Check please

    The High School Step Team Karla’s cousin Jade urged her to join the step team. “This afternoon you should definitely try out!” Jade suggested after the final bell rang. “I know she wants the best for me,” Karla thought to herself, “but I’m

  16. physics

    A man walks 5 m at 37 degree north of east then 10 m at 60 degree west of north.? calculate the magnitude and direction of his displacement.

  17. English- Miss Sue

    1.Revise the following sentences so that the subject and verb of each sentence identify key actors and actions: •The dedication of professors to multiculturalism is crucial to encouraging students of all races to succeed. •Currently, the percentage of

  18. physics

    A river flows due east at 1.50 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 9.2 m/s due north relative to the water. (a) What is the velocity of the boat as viewed by an observer on the shore?

  20. physics

    An airplane starts from rest at the end of a runway and accelerates at a constant rate. In the first second, the airplane travels 1.11 m. What is the speed of the airplane at the end of the second second?

  21. CHEM

    At constant pressure, which of these systems do work on the surroundings? Check all that apply. 2A (g) + B(s) --> 3C(g) 2A (g) +2B (g) -->5C(g) A(g)+ B(g) --> C(g) A (s) +2B(g)--> C(g)

  22. physics

    A particle, starting from point A in the drawing at a height h0 = 3.2 m, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height hf = 4.1 m above the floor before falling back

  23. Physics

    Two uncharged metal spheres, spaced 20.0 cm apart, have a capacitance of 28.0 pF. How much work would it take to move 14.0 nC of charge from one sphere to the other? *Please report answer in Joules.

  25. physics

    You throw a 20-N rock vertically into the air from ground level. You observe that when it is 15.0 m above the ground, it is travelling at 25.0 m/s upward. Use the work-energy theorem to find a) its speed just as it left the ground; b) its maximum height.

  26. mathematics

    How many ways are there to split 12 people into 4 groups with 3 people in each group?

  27. physics

    A propeller blade has a length of 2.42 m and, starting from rest, the tip of the blade has a tangential acceleration of 2.73 m/s2. What is the magnitude of the total acceleration of the blade, in m/s2, 0.97 s after the blade starts rotating?

  28. Math

    Which statement is true? 1.22/1527/19 *3.15/25>22/44 4.30/25

  30. Language arts

    Which lines from White Fang would be the best to include in a character analysis about the main character, White Fang? i need help with this test Writing & Analysis of Characterization Quiz

  31. AP Statistics

    A family has two cats named Gordo and Flaco. Gordo weighs 15 pounds and Flaco weighs 8 pounds. A cat’s weight is classified as unhealthy if the weight is located in the top 5% or bottom 5% of all cat weights. The distribution of cat weights is

  32. stats

    Which of the following can be reasonably modeled by a normal distribution? The favorite colors of students in a kindergarten class A The heights of tomato plants that were all planted on the same day B The percent of employees from a company who attended a

  33. History

    1. Which of the following is not one of the three branches of the federal government? A. constitutional Branch*** B. executive branch C. judicial branch D. legislative branch 2. Which of these jobs is in the executive branch? A. Chief Justice B.

  35. social studies

    What was the primary puporse of the Silk Road?

  36. Algebra

    Identify the mapping diagram that represents the given relation and determine whether the relation is a function. {(–3, –6), (–1, –6), (5, –6), (8, –6)} It won't let me update the pictures, but I think it might be a function, but I'm not 100%

  37. English 9th grade

    1. Which of the following best describes science fiction? Answer:C The characters often face problems related to future tech advancements. 2. A literary analysis should contain a Answer: A thoughtful interpretation of a work 3. Which sentence below is

  38. Social Studies

    How did the location of the Gobi and Taklamakan Deserts, the Himalaya Mountains, and the Pacific Ocean impact early settlement in China? A. It meant early peoples had to trade along the Chang River. B. It meant early peoples had to develop into a seafaring

  40. Math

    Find the value(s) of a making v =6ai−3j parallel to w =a^2i+9j . a=

  41. Chemistry

    copper(II) nitrate and barium sulfide Express your answer as a complete ionic equation and a net ionic equation.

  42. Properties of Addition with Whole Numbers

    Name the property illustrated 7 + 8 = 8 + 7

  43. math

    You purchase a computer for $875.00 plus 5% sales tax. You decide to finance it through the store's 0% program for 12 months. The terms state you pay nothing until the 12 months are over. When you receive the bill, you forget to pay it and are assessed a

  45. Algebra 2

    What point in the feasible region maximizes the objective function ? (3 points) Constraints {x>0 {y>0 {-x+3>y {y

  46. Math (Stats)

    In order to predict y-values using the equation of a regression line, what must be true about the correlation coefficient of the variables? A. The correlation between variables must be an x-value of a point on the graph. B. The correlation between

  47. History please help

    1. Why was it important for Lincoln to wait to issue the Emancipation Proclamation It could have caused revolts in the north It was important to have popular support beforehand It could have ended the rebellion before Union victory It may have caused

  48. Chemistry

    According to the quantum-mechanical model for the hydrogen atom, which of the following transitions would produce light with longer wavelength: 3p to 2s or 4p to 2s? A) The 3p to 2s transition would produce light with longer wavelength. B) The 4p to 2s

  50. Chemistry

    1) How does the atomic radius change from left to right across a period in the periodic table? A) It tends to decrease*** B)It tends to increase C) It first increases, then decreases D) It first decreases, then increases 2) What is the charge of a cation?

  51. problem solving

    Sandra is eight yrs younger than her brother mike. six yrs ago mike was three times old of Sandra. how old is mike? how old is Sandra?

  52. Chemistry

    An enzyme has velocities of 0.11 nmol/min at a substrate concentration of 1 μM, 0.34 nmol/min at a substrate concentration of 5 μM, and 0.45 nmol/min at a substrate concentration of 10 μM. What is the Vmax for the enzyme if the KM is 5 × 10–6 M? A.

  53. social studies HELP PLSS

    1. Which of the following was the provision in the treaty of paris 1763? A.All french land in north america was being given to england B.All french land in north america was being given to spain C.All french land west of mississippi & louisiana were to be

  55. geometry

    ray EC bisects angle BED, The measure of angle AEB equals 11x minus 12.and The measure of angle CED equals 4x plus 1.. Find measure of angle AEC.

  56. chemistry

    The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn(s) + 2Cl2(g) --> SnCl4(l) ΔH°rxn = -511.3 kJ/mol

  57. Math

    1. Write the ratio in the simplest form. 50:10 (a) 25:5 (b) 10:2 (C) 5:1* (D) 1:5 2. Solve the following proportion. p/6=7/8 (a) p=5.25 (b) p=8 (c) p=10.5* (d) p=42 3. Chris's uncle has a model car. The model is 6 inches long and 3 inches wide. The actual

  58. English

    10. In “Orphans Give Indian Couple Will to Live,” the Paramesvarans are offended by the term orphans because a. they feel they are now the parents to these children*** b. the government will not let the children be adopted by them c. Mr. Paramesvaran

  60. MATH

    1. Which of these numbers can be classified as both real and rational? 1/2 -1.016879413894 Square root: 5 0.89089908999 2.Which is both a real number and an integer? Square root 7 0.15 -15 1/3 3. What is an example of an irrational number? Sqre root:

  61. Machines and humans?

    What are some conflicts between humans and machines that have arisen in the past? So I already said that machines can put humans out of work- but any other ideas? any sites I could read up on something like this?

  62. Calculus

    Sketch the vector field F⃗ (r⃗ )=2r⃗ in the plane, where r⃗ =⟨x,y⟩. Select all that apply. A.All the vectors point away from the origin. B. The vectors increase in length as you move away from the origin. C. All the vectors point toward the

  63. geometry

    What is the value of x? Justify each step. AC=32 2x 6x+8 .__________________._________________. A B C Drawing not to scale AB + BC = AC a.segment addition postulate 2x + 6x + 8 =32 b.substitution 8x + 8 = 32 c.simplification 8x = 24 d.addition property of

  65. Physics

    An green hoop with mass mh = 2.4 kg and radius Rh = 0.14 m hangs from a string that goes over a blue solid disk pulley with mass md = 2.2 kg and radius Rd = 0.1 m. The other end of the string is attached to a massless axel through the center of an orange

  66. science

    1) a pea plant with yellow seeds is crossed with a pea plant with green seeds. all of the offsprings have yellow seeds. the allele for yellow sees is a. Dominate because all offspring have yellow seeds. b. Recessive because all of the offsprings have

  67. Math

    1.)which two sq roots are used to estimate 5? a.)1 & 2 b.)2 & 4 ****** c.)4 & 9 d.)9 & 16 2.)which two sq roots are used to estimate 43? a.)25 & 36 b.)36 & 49***** c.)49 & 64 d.)25 & 64 3.)an estimate for the sq root of -66 is? a.)-6 b.)-7 c.)-8***** d.)-9

  68. Chemistry

    Calculate ΔG° for the following reaction at 298 K.? A+B --> 2D ΔH° = 775.0 kJ ΔS°=296.0 J/K C --> D ΔH° = 446.0 kJ ΔS°=-218.0 J/K A+B --> 2C ΔG° = ? kJ I know I am suppose to reverse the (C --> D) and add a coefficient of 2 to both the enthalpy

  70. english

    6.Read the following excerpt from "The Middle Passage" by Olauduh Equaino. Immediately another quite dejected fellow who on account of his illness was suffered to be out of irons also followed their example and i believe many more would soon have done the

  71. Chemistry

    For the following chemical reaction... HCN (aq) + KOH (aq)----> H2O (l) + KCN (aq) write the net ionic equation, including the phases

  72. Physics

    An aluminum bar has the desired length when at 10 degrees Celsius. How much stress is required to keep it at this length if the temperature increases to 33 degrees Celsius?

  73. 7th grade math Ms.Sue please!

    Use cross products to see if each pair of ratios forms a proportion. Replace each box with = or ≠. 1. 7/5 ? 15/10 = ≠ 2. 6/8 ? 15/20 = ≠ Solve each problem. 3. 2/3 = 1.2/x x = 18 x = 1.8 x = 0.2 x = 10 4. 4/5 equals 8/x plus 2 x = 4 x = 9.5 x = 2 x =

  75. 7th grade math Ms.Sue please check my answers

    1. Mac’s farm has a total of 18 horses and 27 cows. What is the ratio of horses to cows in simplest form? (1 point) 6 over 9 18 over 27 2 over 3 three over two 2. A class has 27 students. Fifteen are boys and the rest are girls. What is the ratio of

  76. algebra

    Which set represents a Pythagorean triple? 27, 38, 42 33, 44, 55 35, 38, 42 68, 72, 81 Which number completes the Pythagorean triple: 12, 16, ____? 18 20 22 24 A base ball diamond is square. The distance from home plate to first base is 90 feet. In feet,

  77. Physics

    A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 130 N at an angle of 30.0° above the horizontal. The box has a mass of 24.0 kg, and the coefficient of kinetic friction

  78. Chemistry

    A 15.5 mL sample of 0.215 M KOH solution requires 21.2 mL of acetic acid in a titration experiment. Calculate the molarity of the acetic acid solution. Please show all steps, I don't understand this.

  80. Chemistry

    will a red blood cell undergo crenation, hemolysis, or no change in each of the following solutions? 1% (m/v) glucose 2% (m/v) NaCl 5% (m/v) NaCl .1% (m/v)NaCl

  81. Chemistry

    write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water

  82. chemistry final-urgent

    Choose the element with the highest ionization energy element: Na, Mg, Al, P, S In my book: ionization energy increase from left to right and bottom to top. Na

  83. Chemisty.....Help =))

    What is the molarity of ZnCl2 that forms when 30.0g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL . (please explain step by step I have no clue!) Zn(s) + CuCl2(aq) --> ZnCl2(aq)+ Cu(s)

  85. Physics

    Now assume that the pitcher in Part D throws a 0.145-kg baseball parallel to the ground with a speed of 32 m/s in the +x direction. The batter then hits the ball so it goes directly back to the pitcher along the same straight line. What is the ball's

  86. Algebra

    Why is it necessary for the encoding function to be one-to-one?

  87. Chemistry

    What volume of 0.300 M Na3PO4 is required to precipitate all the lead(II) ions from 140.0 mL of 0.400 M Pb(NO3)2? I desperately need help with this, I cannot figure it out, my mind is bleeding.

  88. Physics

    A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the drive steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N. a) What is the magnitude of the force of the car on the truck? b) what is the

  90. Statistics 250

    In a normal distribution, what z-score value separates the highest 90% of the scores from the rest of the distribution? a)z = -1.28 b)z = 1.28 c)z = -0.13 d)z = 0.13

  91. Physics.

    The figure below shows an arrangement of 15 identical disks that have been glued together in a rod-like shape of length L = 1.4500 m and (total) mass M = 135.000 g. The arrangement can rotate about a perpendicular axis through its central disk at point O.

  92. Physics

    A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-fourth its original speed. What is the mass of the second ball?

  93. Chemistry II

    C4H4 (g) + 2 H2 (g) --> C4H8 (g) Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341

  95. physics

    a marble is dropped from the top of a skyscraper. Is the work done by earths gravitational force on the marble equal to, smaller than or larger them that done by the marbles gravitational force on earth? Why? newtons 3rd law: force on marble due to earths

  96. chemistry

    What will be the final temperature of the water in an insulated container as the result of passing 5.00 g of steam [H2O(g)] at 100.0°C into 195.0 g of water at 20.0°C? (?H°vap = 40.6 kJ/mol H2O) The best way to do these problems is to make the heat

  97. science

    Which of the following accurately describes an object that is accelerating? A car slows down to turn a corner. A bike moving backwards at 3 meters/second. A ball sitting motionless on the floor. An airplane moving at 500 km/hr.

  98. Number Theory and Fractions Unit Test

    1. find the digit that makes 2,440 divisible by 9 a 6 b 8~ my answer c 5 d 7

  100. mathematics

    At a birthday party, 5 boys and 3 girls are seated around a table. How many different arrangements are possible if b a boy named Alex, and a girl named Beth are not seated next to each other?

  101. mathematics

    How many ways are there to split 12 people into 4 groups with 3 people in each group?

  102. Check LA Answers

    What is etymology? (1 point) the pronunciation of a word the spelling of a word the history of a word the part of speech of a word*** What do etymological patterns help readers do?(1 point) define words pronounce words*** organize words spell words What is

  103. Language arts pls check my answer

    Where is the part of speech located in a dictionary entry?(1 point) a. in the numbered definitions that follow the entry word b. before the entry word c. after the pronunciation d. in parentheses after the entry word i think the answer is c. after the

  105. mathematics

    Dan, Ben, and Mark are friends. Together, along with two of their classmates, they bought movie tickets that were all in one row. How many different ways can everybody sit if Dan, Ben, and Mark want to sit together?

  106. ELA Practice: Expectations Unit Review Practice

    1. Read the poem. Drip drop, plip plop like a shower faucet Rain pours from the sky our noses pressed flat against the window The sky is an aquarium Which line from the poem contains a metaphor? A. Drip drop, plip plop B. like a shower faucet C. against

  107. Math

    Using the information given below write the equation of the hyperbola: The transverse axis of the hyperbola lies on the line y=–3 and has length 6; the conjugate axis lies on the line x=2 and has length 8.

  108. Language Arts

    What are context clues?(1 point) a statement about what the reader thinks will happen in a text a conclusion about ideas that is not stated directly in a text*** the facts and information that support an idea or analysis hints that point to the meaning of

  110. Social Studies

    1.) Hip-hop began as a musical style in the United States decades ago. The Japanese have since developed their own version of hip-hop. This is an example of A.) Migration B.) Acculturation C.) Assimilation D.) Cultural Diffusion 2.) Which of the following

  111. Science

    1.)​CaCO3→CO2​+CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. What is the total mass of the products?(1 point) A.)10 grams B.)15 grams C.)60 grams

  112. science

    Light waves are traveling through glass. If the wavelength of some part of the light wave is 4 x 10-7 m and the frequency of that light is 5 x 1014 Hz, what is the speed of light through the glass? 8 x 10-22 m/s 1 x 107 m/s 1.25 x 1021 m/s 2 x 108 m/s

  113. English

    An effective thesis statement should be _[blank]_. Which option best completes the sentence? -short and simple -focused and specific -long and complex -general and universal

  115. Science

    In the picture below, a boy is trying to pull a dog on a leash, but the dog and the boy are moving in the same direction. Which of the following best describes the forces in this situation? * 1 point A The forces are balanced, and the net force is zero. B

  116. Calculus, math

    Consider the function below. (If an answer does not exist, enter DNE.) f(x) = e^arctan(7x) I did the problem but I have mistakes on some items. I think the ff. are right: Vertical Asymptote: x = DNE Horizontal Asymptote: y = e^-(pi/2), e^(pi/2) Interval

  117. Social studies

    Drag and drop the events that occurred in Ancient Rome in order from top to bottom. The Emperor Constantine came to power and united the empire. A stable empire under Augustus led to a period of peace. The city of Rome was attacked by Germanic tribes.

  118. history

    Which titan is correctly matched with his industry? A. J. Pierpont Morgan > Oil B. Andrew Carnegie > Steel ** C. John D. Rockefeller > Banking D. John Sherman > Oil

  120. Chemistry

    Enter the balanced complete ionic equation for HCl(aq)+K2CO3(aq)→H2O(l)+CO2(g)+KCl(aq) Would it be: 2H+(aq) + 2Cl^-(aq) + 2K^+(aq) + CO3^2-(aq) => H2O(l) + CO2(g) + 2KCl(aq)? Thanks

  121. Math

    Which of the following is a statistical question? A. How many floors are in the Empire State Building? B. How many states are in the United States of America? C. How tall is the Washington Monument in Washington, D.C.? D. How old was each U.S. President

  122. Math

    Which of the following is a statistical question? A. How many floors does the empire state building have? B. How many states are there in the United States? C. How tall is the Washington monument in Washington DC? D. How old was each US president when he

  123. Global Studies

    Q: Which statement best illustrates how American Indians were affected by British colonization? A: A. Trading partnerships led to peaceful co-existence between American Indians and British B. American Indians converted to Christianity resulting in

  125. algebra 2

    The graph of g(x) is the graph of f (x)= x^2 shifted 4 units left, vertically stretched by a factor of 3, then shifted 5 units up. What is the function rule for g(x)?