Posts by zachary

Total # Posts: 134

  1. Physics

    A concave spherical mirror has a radius of curvature of 29.4 cm . The object distance is 5.7 cm .Scale: 10 cm = Find the magnitude of the image distance. Answer in units of cm. 2- Find the magnification.
  2. physics

    Calculate the position of the image when an object is placed 0.492 m from the mirror. Answer in units of m.
  3. physics

    A concave mirror has a radius of curvature of 1.61 m. Calculate the position of the image produced when an object is placed 2.66 m from the mirror. Answer in units of m.
  4. physics

    An excited atom emits a photon of a certain frequency. Then two photons of this frequency fly towards the atom. Which of the following is likely to happen next? 1. An atom will emit another photon of the same frequency. 2. The atom will absorb one of the photons and will ...
  5. Math

    A charity raffle offers a first prize of $1,000,000, a second place prize of $100,000 and a third place prize of $10,000. A total of 500 000 tickets will be sold. What price should be charged for a ticket in order for the charity to make a 60% profit on this raffle?
  6. Math

    In its Flip Your Lid contest, a coffee chain offers prizes of 50 000 free coffees, each worth $1.50; two new TVs, each worth $1200; a snowmobile worth $15 000; and a sports car worth $35 000. A total of 1 000 000 promotional coffee cups have been printed for this contest. ...
  7. physics

    Two workers are sliding 450 kg crate across the floor. One worker pushes forward on the crate with a force of 380 N while the other pulls in the same direction with a force of 380 N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a ...
  8. Physics

    Consider the motion of the two projectiles fired at t = 0. Their initial speeds are both v0 but they are fired with different initial angles ?1 and ?2 with respect to the horizontal. What is the ratio of the times of the flights?
  9. Chemistry

    Consider the Unbalanced Reaction: Al2O3(s) + CO(g) ? Al(s) + CO2(g) Estimate ?G at 298 K if 7.1 moles of Al2O3(s) is reacted.
  10. Physics

    Alice is going on a picnic and is aware that it will be easier to carry the picnic basket if it balances at the center where the handle is attached. She has placed a 2.15-kg container of potato salad at one end and a 0.750-kg package of hot dogs at the other end of a 52.0-cm ...
  11. lego robotics

    WHY DID THEY NOT LET ME IN!!!!!?????
  12. Math

    Jan and Susan went to the movies.it was 2 hours and 18 minutes long.it ended at 6:00.what time what time did it start
  13. Math

    1. Find the horizontal change and the vertical change for the translation P(4,-4) (-4,7) A. Right 8; up 11 B. Left 8; down 11 C. Right 8; down 11•• D. Left 8; up 11 2. The point c(x,y) is reflected over the x-axis. Use arrow notations to describe the original point ...
  14. Math

    The point (3,-1) is translated to the left 4 units and up 1 unit.write a rule to describe the translation.what are the coordinates of the image point? A) (x,y)->(x+4,y+1);(7,-2) B) (x,y)->(x-4,y-1);(-1,0) C) (x,y)->(x+4,y-1);(7,0) D) (x,y)->(x-4,y+1);(-1,0) •...
  15. Language

    In which sentence is the meaning of the word astonish expressed? A. Marley says that nothing will surprise Scrooge, given all that he has seen.•• B. Christmas present asks Scrooge to touch his robe. C. Fred's wife expressed her pleasure at the amount of laughter ...
  16. Language

    in which line is the opposite of the word audible best expressed? " Spirit tell me if Tiny Tim will live" " Save your Breath Mr. Scrooge. You can't be...... heard"•• "I'll drink to his health for your sake..... But not for his sake&...
  17. Language

    In which of those lines is the meaning of the word intercede best expressed? A. The attacker between the goal and goalie. B. In court cases, attorney intercede on their client's behalf.•• C. If you don't agree with someone you should try to Intercede. D. In ...
  18. Math

    3. Determine which ordered pair is a solution of y = –5x + 10. (1 point) (–15, 5)•• (2, 0) (–1, –5) (3, 25) Correct my answers
  19. math

    Mimi's market sold 24 heads of lettuce one morning. That afternoon 2/7 of the remaining heads of lettuce were sold. The number of heads left is now 1/2 of the number the market had at the beginning of the day. How many heads of lettuce were there at the beginning of the ...
  20. Math

    Explain how u can write 35% as a sum of 2 benchmarks percents or as multiple of a percent? PLEASE TELL ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:)
  21. Math

    $480
  22. math

    3×50=150
  23. ENGLISH

    I have not winced nor cried aloud.--sight
  24. ENGLISH

    give me 5 lines that sensory images please. I can't identify
  25. ENGLISH

    Please help me to pick out 6 lines from the poem Invictus of William Ernest Henley that used sensory images and identify the sense used for each line.I also need to pick out one line that used onomatopoeia. I only Have one answer Black as the pit from pole to pole--sight
  26. science

    Is it bad to shave the pubic hair? Why or why not? How does shaving affects the growth of pubic hair?
  27. english

    I don't have nothing to see
  28. english

    Black as the pit from pole to pole-sight
  29. Computer

    Our professor wants us to get more likes on our facebook account. Can anyone tell how?
  30. Computer

    I tried some of these but they don't work.
  31. Computer

    Our professor wants us to get more likes on our facebook account. Can anyone tell how?
  32. ENGLISH

    Thanks a lot Writeacher. This website is really a blessing for us--students and anyone who wants to learn.
  33. ENGLISH

    1.feel 2.nod 3.look 4.explain 5.offer
  34. ENGLISH

    1. made them feel 2.noticed the witness nod 3.saw his players 4.let her students 5.heard the officers offer
  35. ENGLISH

    Here are my answers 1.make them feel the need 2.noticed the witness nod 3.saw his players look 4.let her students explain 5.heard the officers offer
  36. ENGLISH

    CHOOSE THE BARE INFINITIVE IN EACH SENTENCE. 1.make them feel the need to rise and give you a hand. 2.The judge noticed the witness nod his head with approval. 3.The coach saw his players look at one another with enthusiasm. 4.The teacher let her students explain their ideas. ...
  37. ENGLISH

    okay thanks. 2.disorganized 6.amazing 11.frozen
  38. ENGLISH

    Can you give me your final answers writeacher, please? Thanks a lot
  39. ENGLISH

    1.ringing 2. meeting 3.speeding 4.boiled 5.wrinkled 6.told 7. sliced 8.Clashing 9.winning 10.challenging 11. warmed 12.injured 13.Recycled 14.terrifying 15.used
  40. ENGLISH

    IDENTIFY THE PARTICIPLE IN EACH SENTENCE. 1.No one answered the ringing phone. 2.The meeting, noisy and disorganized, was a waste of time. 3.The speeding car almost crashed. 4.A boiled egg has fewer calories then a hamburger. 5.She wore a wrinkled blouse. 6.Grandmother told us...
  41. Social Studies

    how does the work of geographers in government differ from those in the busines world
  42. Calculus Help and Check

    both answers are wrong correct answer = $170,000
  43. Chemistry

    How exactly do you get pH from Ka?
  44. Chemistry

    The following questions refer to the following acids and bases. A) Hydrazoic acid HN3 Ka = 1.9 x 10^-5 B) Hydrofluoric acid HF Ka = 6.8 x 10 ^-4 C) Nitrous Acid HNO2 Ka = 4.5 x 10^-4 D) Phenol C6H5OH Ka = 1.3 x 10^-10 E) Aniline C6H5NH2 Ka = 4.3 x 10^-10 1) which compound is ...
  45. Strayer

    Which of the following units could be associated with a vector quantity
  46. Science check answer quick!

    1) Earth's gravity acts on people inside a space station orbiting the earth. 2) It applies to any two objects at any location. 3) the entire earth, located one earth radius away 4) 2.8 days 5) 200 N 6) 1.67 x 10^-9 N 7) 7.70 km/s I just took this quiz. These are the answers.
  47. Social Studies (History)

    When searching for evidence to support a claim, what are important things to remember? Please explain your response.
  48. Check my answers please- Physics

    1. A force that makes the net force on an object zero. 2. It is equal in magnitude and opposite in direction. 3. An moving object in equilibrium continues at a constant velocity. 4. 5N 5. 8.5N 6. 24N 7. 90N
  49. Physics

    1. A force that makes the net force on an object zero. 2. It is equal in magnitude and opposite in direction. 3. An moving object in equilibrium continues at a constant velocity.
  50. physics

    A certain LCD projector contains a single thin lens. An object 23.5 mm high is to be projected so that its image fills a screen 1.87 m high. The object-to-screen distance is 3.05 m. (a) Determine the focal length of the projection lens. mm (b) How far from the object should ...
  51. urgent urgent algebra / precalculas

    1. Given a function,H(x)explain how to find the components f(X)AND g(x) such that f(g(x)) = H(x) 2. let H(x)=(2x+5)^4 find the function f and , so that f(g(X))=H(x)
  52. urgent urgent algebra / precalculas

    For # 1, im getting stuck on this problem i don't understand this 1.4 = e ^ (0.03k) Now take the natural logarithm of both sides to solve for , ln 1.4 = ln e ^ (0.03k) ln 1.4 = 0.03k * ln e Recall that ln e = 1. ln 1.4 = 0.03 k Solve for k. Then try part b. For # 2, y = 3...
  53. urgent urgent algebra / precalculas

    rewrite each in exponential expression as a logarithmic expression log, x=4 log 5=2 log b=x
  54. urgent urgent algebra

    rewrite each in exponential expression as a logarithmic expression a)log,x=4 b)log 5=2 c)log ,8=x
  55. algebra URGENT HELP

    cohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the bloodstream...
  56. urgent urgent algebra / precalculas

    lcohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the ...
  57. urgent urgent algebra / precalculas

    Alcohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the ...
  58. urgent urgent algebra

    find the composite function fog f(X) = 1/X-5,g(x)-6/x question 2 find inverse, domain range and asymatotes of each function f(x)=3+e^4-x can some one help me please been stuck on these for 2 days need help solving thank you
  59. algebra URGENT HELP

    7x-6 greater than or equal to -3x^2 reduced and written in interval notation
  60. algebra URGENT HELP

    x+14/x-8 ≥ 1 solve and write solution in interval notation
  61. algebra URGENT HELP

    analyze the graph of the following function solve R(x)=x(x-16)^2 /(x+11) solve the following inequality write solution in interval notation x+14/x-8 less than or equal to 1
  62. algebra URGENT HELP

    form a polynomial whose degree and zeros are given. don't expand a) degree 3,zeros,-2,0,4 b)degree 4,zeros, -2 multiplicity 3,1 multiplicity 1 solutions a)p(x)= x(x+2)(x-4) B)p(x) =(x+2)^3(x-1)
  63. algebra URGENT HELP

    A)p(x)= x(x+2)(x-4) b)p(x)=(x+2)^3(x-1)
  64. algebra

    p(X)= X(X+2)(X-4) P(X)=(X+2)^3(X-1)
  65. algebra

    solve A)p(x)= x(x+2)(x-4) b)p(x)=(x+2)^3(x-1)
  66. college algebra

    given the following polynomial find the zero and multiply of each were the graph touches the x axis number of turning points fx =(x-4)(x^2-25)
  67. college algebra

    y=x^2+2x+8
  68. college algebra

    Given the following quadratic equation, find;? a. the vertex b. the axis of symmetry c. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function. y= -x^2+2x+8
  69. help college algebra

    given the following piecewise function f(x) = -x+1 for x<0 -1 for 0<x<3 -2x for x>3 find the domain find the range find the intercept d) is f continuous on it domain if not sate where f is dicontinous
  70. college algebra

    given the function fx=x^3+x a) find the rate of change between the two stated values for x: 1 to 2 B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)
  71. algebra

    what are the intercepts of y=2x+2
  72. math

    solve for x 75=13^x
  73. Math

    Rearrange this equation to isolate c. a=b((1/c)-(1-d))
  74. college chem

    Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?
  75. urgent urgent urgent

    what is the chemical make up of actin and myocin
  76. urgent urgent urgent

    A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. •Explain the chemical process that occurred ...
  77. urgent urgent urgent

    A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. explain the process the muscle go through
  78. chemstry

    the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement
  79. chemistry urgent urgent

    ... the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement.
  80. Math

    Emily wants to make a rectangular model with a height of one connecting cube. She wants to make the model in exactly 2 different ways. How many connecting cubes could Emily use to make the model in only two ways
  81. chemstry

    Classify six kinds of amino acids according to the functions that they serve in the human body, stating an example for each class.
  82. chemistry urgent urgent

    thank you
  83. chemistry urgent urgent

    Discuss, in detail, the role played by DNA and RNA in genetic diseases. What are the breakthroughs, if any, in the treatment/management of genetic diseases?
  84. chemistry urgent urgent

    the managing director of a company on wall street thrives on a diet of fruit jam,bread,pasta,and coffee.she exercises intermittently.one day she desides to go to her primary healthcare provider for a check up the provider recommends that she takes the benedicts test assume ...
  85. chemistry

    A freshman is currently enjoying the Arts Studio program she is pursuing at a well-known university. In her free time, she likes to skate, take salsa dance lessons, and cook. She particularly enjoys pickling and decides to pickle olives over a leisurely weekend. According to ...
  86. chemistry urgent urgent

    do compare the differentes
  87. chemistry urgent urgent

    Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?
  88. Chemistry: Dr. Bob, can you check my work?

    The first one was correct! I just used the incorrect number of sig figs. Thank you so much!
  89. Chemistry: Dr. Bob, can you check my work?

    Okay. I'll try both. 825mL - 712= 113. You have to convert mL to L in order to use the PV = nRT correct? if so,113mL=.113L P(.1130) = 1.47 moles CO2 * .0821 * 303 K .1130P=36.57 P = 323.6 atm -OR- 825-85.4 = 739.6 mL = .7396L .7369P=1.47(.0821)(303) .7369P=36.57 P=49.6atm
  90. Chemistry: Dr. Bob, can you check my work?

    In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a ...
  91. Chemistry

    I'm still not sure which volume to use though. would it be 825 mL, 825mL - 85.4 mL, or 712 mL?
  92. Chemistry

    Sorry, I made a mistake. 85.4 mL = .0854 L. .0854 L * .79 g/cm3 = .0675g. .0675/46(MM of C2H5OH) = .0147 moles ethanol. .0147 moles ethanol = .0147 moles CO2.
  93. Chemistry

    I found the moles of CO2 and I got 1.47. 85.4 L ethanol * .79 g/cm3 = 67.5g ethanol. 67.5/(12+12+5+16+1)= 1.47 moles ethanol. 1.47 moles C2H5OH *(2 moles C2H5OH/ 2 moles CO2) = 1.47 moles CO2. What do I use for the volume? do I use the volume of the bottle, the volume of the ...
  94. Chemistry

    In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a ...
  95. History

    Can you give me an idea of what to write for a veteran card
  96. History

    Write a thank you veteran card
  97. college algebra

    given the following rational, find the horizontal asympotes the vertical asymptotes if any and the oblique asymptotes if any f(x)=x^2-x-2 over 2x^2-x-10
  98. college algebra

    given the folowing quadratic equations find the vertex the axis of symmetry the intercept the domain the range the interval where the function is increasing andthe interval where the function is decreasing graph the function y=X^2+4x
  99. college algebra

    given function f(X)=X^3+3x findthe rate of change between the two stated values for x:1 to 2 find the equation of a secant line (1,f(1)and(2,f(2))
  100. college algebra

    graph the following function using transformations, be sure to graph all of the stages on one grph, state the domain and range y= x^2 +12x
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