Questions Asked on
September 5, 2011

  1. physics

    A bike first accelerates from 0.0 m/s to 5.0 m/s in 4.5 s, then continues at this constant speed for another 4.5 s. What is the total distance traveled by the bike?

    asked by lindsey
  2. Physics

    Your friend has slipped and fallen. To help her up, you pull with a force F, as the drawing shows. The vertical component of this force is 140 newtons, and the horizontal component is 145 newtons. _____N and the angle

    asked by Dwight
  3. physics

    A rock is thrown vertically upward with a speed of 14.0 m/s from the roof of a building that is 50.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? in s What is the speed of the rock just

    asked by student
  4. Math

    A turtle is at the bottom of a 12 foot well. Each day it crawls up 3 feet, but each night it slips back 2 feet. After how many days will the turtle reach the top of the well? ANSWER: The turtle will reach the top of the well after [ ] days... Thanks

    asked by Jenna
  5. world history

    Which civilizations were likely to have contact with each other?Why? _answer: Indus valley and Shang because they are close geographically B)Between which lines of latitude did early civilizations develop? Why? _Between lines of 20N and 40N. Because at

    asked by mike
  6. math

    my ones digit is 5 more than my tens digit. i am greater than 25 and less than 35

    asked by dalton
  7. physics

    Karen shouts across a canyon and hears an echo 3.1 s later. How wide is the canyon? The speed of sound is 343 m/s. Answer in units of m

    asked by Lilli
  8. Physics

    Suppose that a NASCAR race car is moving to the right with a constant velocity of +92 m/s. What is the average acceleration of the car? (b) Twelve seconds later, the car is halfway around the track and traveling in the opposite direction with the same

    asked by Kyle
  9. Physics

    a novice pilot sets a plane's controls, thinking the plane will fly at 2.5X10^2 km/h to the north. if the wind blows at 75 km/h toward the southeast, what is the planes's resultant velocity?

    asked by Amanda
  10. chemistry

    Prepare 500mL of a 0.200 M acetate buffer at pH 4.90 using only pure acetic acid, 3M NaOH, and water. 1) Add acetic acid to ~400mL of water in a 500 mL beaker. How many grams of acetic acid are needed? 2)Add 3 M NaOH solution until pH is 4.90. What volume

    asked by Ryn
  11. Chemistry II

    Liquid sodium can be used as a heat transfer fluid. It's vapor pressure is 40.0 torr @ 633 degrees C and 400.0 torr @ 823 degreees C. Calculate it's heat vaporization.

    asked by Keith
  12. mathematics

    if sinA+sinB=x and cosA-cosB=y then find tan[(A-B)/2]

    asked by diviya
  13. Physics

    A helicopter is lifting off from the ground and is moving vertically upward. The graph shows its vertical velocity vy versus time. How high is the helicopter after 12.0 s have elapsed?

    asked by Kyle
  14. Chemistry

    Need help solving this problem. A 0.188g sample of unknown metal, X (s), produced 71.4ml of hydrogen gas when reacted with HCl according to the equation: X(s)+2HCl(aq)--> XCl2(aq)+H2(g) The gas was collected over water at 23 degrees C. The levels of water

    asked by Louis
  15. Phyiscs

    A stone falls from a railroad overpass which is 36 ft high into the path of a train which is approaching the overpass with a uniform speed. If the stone falls when the train is 50 ft away from the overpass and the stone hits the ground just as the train

    asked by Stone
  16. physics

    A passenger on a stopped bus notices that rain is falling vertically just outside the window. When the bus moves with constant velocity, the passenger observes that the falling raindrops are now making an angle of 18 with respect to the vertical. What is

    asked by cassie
  17. Chemistry

    how many C2H4 molecules are contained in 45.8 mg C2H4 when the molar mass of C2H4 is 28.05g/mol

    asked by Thomissa
  18. Managerial accounting

    The marketing department of Jessi Corporation has submitted the following sales forecast for the upcoming fiscal year (all sales are on account): 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Units to be produced 12,000 14,000 13,000 11,000 The selling

    asked by kim
  19. Physics

    A parachutist descending at a speed of 19.6 m/s loses a shoe at an altitude of 41.6 m. What is the velocity of the shoe just before it hits the ground? The acceleration of gravity is 9.81 m/s2. Answer in units of m/s

    asked by Bethany
  20. chemistry

    How many cubic centimeters of olive oil have the same mass as 1.30 L of gasoline? Olive oil 0.92g/mL, gasoline 0.66g/mL

    asked by Sammy67
  21. Chemistry

    In the manufacturing of computer chips, cylinders of silicon are cut into thin wafers that are 2.80 inches in diameter and have a mass of 2.00g of silicon. How thick (mm) is each wafer if silicon has a density of 2.33g/cm^3? (The volume of a cylinder is

    asked by Jennifer
  22. Physical Science

    A race car goes around a level, circular track with a diameter of 1km at a constant speed of 90 km/h. What is the centripital acceleration?

    asked by Jill
  23. AP Chemistry

    The formulas for ethanol and ammonium nitrate are C2H5OH and NH4NO3. In what respects are these formulas and compounds different? Am I supposed to say that there are different elements that make up the compounds?

    asked by Jen
  24. math

    A stone is tossed vertically into the air from ground level with an initial velocity of 15 m/s. Its height at time t is h(t)=15t-4.9t^2. Compute the stone's average velocity over the time interval [0.5, 2.5]. It says the answer is .3, but I keep getting

    asked by terra
  25. Spanish-Please check

    Hi, did I do these correctly? Thank you- 1. ¿Qué te gusta hacer? Me gusta nadar y andar en patineta. 2. ¿Te gustan los deportes? Sí, me gustan los deportes. 3. ¿Qué comida te gusta comer? Me gusta hamburguesa y unas papas fritas o la paella. Could I

    asked by Jackson
  26. Math

    A drawer contains 22 black socks, 22 white socks, 22 blue socks, and 22 brown socks. If the light is off and Matt reaches into the drawer to get his socks, what is the minimum number of socks he must pull out in order to be sure that he has a matching

    asked by Bianca
  27. science

    The radius of the Iron atom is 124 pm. How many of these will span a distance of 50.5 m..

    asked by megan
  28. Physics

    A child traveling 5m/s on a sled passes her younger brother.if her average acceleration on the sledding hill is 2m/s,how fast is she traveling when she passes her older brother 4s later.

    asked by rally
  29. physics

    An airport has runways only 132 m long. A small plane must reach a ground speed of 40 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport? Answer in units of m/s2

    asked by carissa
  30. Science

    Most enzymes in the human body work best at 37 degrees Celsius, Imagine scientists have discovered an enzyme in the body that works best a t 39 degrees Celsius, what processes or functions might this enzyme be involved in?

    asked by Bryce
  31. Chemistry

    I'm going crazy please help me out part 1 of 2 Determine the mass of anhydrous copper(II) sulfate that must be used to prepare 250 mL of 2.01 M CuSO4(aq). Which i found to be 80.204g part 2 of 2 Determine the mass of CuSO4.5H2O that must be used to prepare

    asked by ninzyy
  32. Spanish 1-Please check someone

    Hi, did I do these correctly? Thank you- 1. ¿Qué te gusta hacer? Me gusta nadar y andar en patineta. 2. ¿Te gustan los deportes? Sí, me gustan los deportes. 3. ¿Qué comida te gusta comer? Me gusta hanburuesa y unas papas fritas o la paella. Could I

    asked by Jackson
  33. physics

    the two crates 40-kg and 60-kg are to be accelerated upward to a ship at the rate of 0.30-m/s2 determine the tension in each rope ?

    asked by Lord
  34. U.S history 8th grade

    who was the founder of roanoke island? that is the last question on my U.S history worksheet!!!!!

    asked by sammie
  35. chemistry

    Determine how much heat is evolved or absorbed when 40.0 g of lithium iodide completely dissolves in water.

    asked by Sara
  36. Physics

    From t = 0 to t = 5.00 min, a man stands still, and from t = 5.00 min to t = 10.0 min, he walks briskly in a straight line at a constant speed of 2.3 m/s. (a) What is his average velocity vavg in the interval 2.000 min to 7.90 min? I found this to be 1.15

    asked by Natalie
  37. math 5th grade

    What are the multiplication combinations for 180?

    asked by andy
  38. General Chemistry

    A 0.1358g zinc metal reacts completely with Dil HCL to produce 52.20ml of H2(g) at 22.0 degrees Celsius. The hydrogen gas is collected over water at 22.0 degree Celsius and a barometric pressure of 755 mm Hg. The water vapor pressure at 22.0 degrees

    asked by Kathy
  39. Biology

    Sponge bob notices that his pal Gary is suffering form slimotosis , which occurs when the shell develops a nasty slime and gives off a horrible odor. His friend Patrick tells him that rubbing seaweed on the shell is the perfect cure, while Sandy says that

    asked by Aja
  40. Prob and Stats

    The Roper Organization conducted identical surveys 5 years apart. One question asked of women was Are most men basically kind, gentle, and thoughtful? The earlier survey revealed that, of the 3,000 women surveyed, 2,010 said that they were. The later

    asked by Dave
  41. Physics

    Police find skid marks 66 m long on the highway showing where the car made an emergency stop. Assuming that the acceleration was -10 m/s2 (about the maximum for dry pavement), how fast was the car going?

    asked by Katie
  42. MATH

    FIND EACH ESTIMATE: 1) A RARE TRUFFLE ONCE SOLD FO $13.20 FOR A 0.44 OZ CAN. APPROXIMATELY HOW MUCH WOULD 1LB OF THIS TRUFFLE COST? 2) THE LENGTH OF THE LONGEST LOAF OF BREAD MEASURED 1,405 FT 1 3/4 IN. IT WAS CUT INTO SLICES 1/2 IN. THICK. HOW MANY SLICES

    asked by MARCO
  43. AP Physics

    A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 3.80 m to the north, 1.90 m northeast, and 1.10 m at 30.0° west of south. Starting at the same initial point, an expert golfer could make the hole in what

    asked by Lola
  44. Physics

    A particle starts from xi = 10 m at t0 = 0 and moves with the velocity graph shown in the graph below. Sorry for no graph it's at 12 m/s when time is zero. Moves down consistently so that it is 8 at 1 4 at 2 0 at 3 and negative 2 at 4. (a) What is the

    asked by Kaitlyn
  45. Math

    Find a formula and graph the function: A ferris wheel is 20 meters in diameter and boarded in the six oclock position from a platform that is 4 meters above the ground. The wheel completes one full revolution every 2 minutes. At t=0 you are in the twelve

    asked by Alex
  46. english

    Facetious remarks often communicate serious ideas. An example is this comment by Mark Twain: "One of the most striking differences between a cat and a lie is that a cat has only nine lives." What is the serious meaning behind that remark? What might be the

    asked by Clement
  47. MATH

    POINTS A, B, AND C ARE COLLINEAR. IF AB=7AM AND BC =13CM WHAT IS AC ANSWER

    asked by BIAO
  48. math

    A cuboid has a square base of side 18cm.The height of the cuboid is 10.4cm.Find its volume

    asked by kimi
  49. physics

    two boys on ice skates hold a rope between them. One is heavier than the other. The light weight boy pulls on the rope. how will they move and who will move faster?

    asked by neil
  50. physics

    Given that the electric potential is 7.0×10^−2 V higher outside the cell than inside the cell, and that the cell membrane is 0.10 thick, calculate the work that must be done (in joules) to move one sodium ion from inside the cell to outside.

    asked by nikki
  51. physics

    mercury has a density of 1.36x10^4 kg/m. what is the density of mercury in units f g/cm?

    asked by amira
  52. AgBio1

    Evidence shows that hippos and whales are closely related organisms. How might evolution and adaptation account for similarities and differences between them.? PLEASE HELP :o

    asked by Kiersten
  53. Chemistry

    The label on a 1-pint bottle of mineral water lists the following components. If the density is the same as pure water and you drink 3 bottles of water in one day, how many milligrams of each component will you obtain? calcium 28 ppm

    asked by Jennifer
  54. physics

    he speed of light in a vacuum is about 3.00 108 m/s how many kilometers a pulse from a laser beam travels in exactly 3.9 hours.

    asked by Anonymous
  55. Chemistry

    Answer check: I got 1.66 x 10^3 g O2 A steel cylinder contains 98.0 moles of oxygen gas at a temperature of 38 degrees C and a pressure of 740 torr. After some of the oxygen gas has been used, the pressure is reduced to 332 toor at a temperature of 24

    asked by Lola
  56. Physics

    A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before

    asked by Caylee
  57. MATH

    POINTS A,B,AND CARE COLLINEAR .IF AB=7CM AND=13CM, WHAT IS AC'S ANSWERS

    asked by BIAO
  58. English

    Can you please check these sentences I corrected myself on the basis of your suggestions? 1) On that particular night, unlike the preceding seven nights, the narrator opened the door with greater caution than the nights before. 2) However, he made a noise

    asked by Henry2
  59. Physics

    A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before

    asked by Caylee
  60. Physics

    A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before

    asked by Caylee
  61. Math

    Find the rectangular coordinates of (7, 30°)

    asked by McKenzie
  62. Pre-Calculus/Trig Check please and help

    Could someone please check the first one and help me with the second one. I'm stuck-Thank you 1.What are theroots of the following polynomial equation? (x+2i)(x-5)(x-2i)(x+8) = 0 I think the roots are -2i,5,2i,-8-you take out the roots as opposites of what

    asked by Tabitha
  63. physics

    Jen sit on chair , the angle of lower leg 30 degree lenhg 40 cm. calculater center of mass

    asked by Anonymous
  64. statistics

    the breaking strength of a cable known to be normally distributed with a mean of 4000kg and a standard deviation of 25kg.The manufacture prefers that at least 95% of its products meet a strength requirement of 4050 kg.Is this requirement being met? If not,

    asked by shruti
  65. BIOLOGY D:

    Many medications used to treat human illnesses are based on substances found in other organisms. How might a decrease in biodiversity affect medical discoveries and treatments.? :o

    asked by Kiersten
  66. College statistics

    Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students.

    asked by Ashley
  67. English

    Is it posssible to be too scrupulous about following rules? Describe a situation in which someone, perhaps an authority figure, was more concerned with the rules than with the welfare of the people involved. Do you agree or disagree with that person's

    asked by Clement
  68. General Chemistry

    Answer Check... A 3.00L sample of gas was collected over water at 45 degrees Celsius. The wet gas exerts pressure of 1.50atm. When dried the sample occupies 1.80L and exerts a pressure of 1.77 atm at 80.0 degrees Celsius. What is the vapor pressure of

    asked by Kathy
  69. Math

    a set of building block includes various shapes and colors. If 10% of the blocks are cubes, then 40% of the cube blocks are red the what % of the blocks are red cubes?

    asked by Ti
  70. biology

    What are the associated organelles and structures of information storage and transferal?

    asked by michael
  71. stastistics

    Historically, 5 percent of a mail-order firm’s repeat charge-account customers have an incorrect current address in the firm’s computer database. (a) What is the probability that none of the next 12 repeat customers who call will have an incorrect

    asked by bee
  72. Chemistry

    An equilibrium mixture of propanoic acid, CH3CH2COOH and its conjugate base has a pH of 4.87. What form predominates after H3O+ is removed?

    asked by Ada
  73. Physics

    An average family of four uses roughly 1600 liters (about 400 gallons) of water per day. (One liter = 1000 cm3.) How much depth would a lake lose per year if it uniformly covered an area of 90 square kilometers and supplied a local town with a population

    asked by Wing
  74. Physics

    A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before

    asked by Caylee
  75. Science

    How are these related? reractant, product, and chemical reaction

    asked by Bryce
  76. Physics

    The x vector component of a displacement vector has a magnitude of 104 m and points along the negative x axis. The y vector component has a magnitude of 185 m and points along the negative y axis. (a) Find the magnitude of . ________m (b) Find the

    asked by Dwight
  77. Math

    Write the rectangular equation in polar form. (x – 4)2 + y2 = 16

    asked by Tim
  78. Math

    how do you convert 1000 milligrams to grams ?

    asked by Janae
  79. General Chemistry

    Answer Check Please... A compund contains only hydrogen and nitrogen and is 12.6% hydrogen by mass. A gaseous sample of the compound has desity of 0.925g/L at 690 torr and 110 degrees Celsius. What is the molecular formula of the compound? My Empirical

    asked by Kathy
  80. Subjects

    so on this website only teachers answer student's qs. or other students can answer other student's qs i'm just asking this site is really helpful :) :) :) these teachers are really helpful :)

    asked by Gen
  81. physics

    You walk 20 meters to the bus stop, but you notice you forgot your homework you run 20 meters back home. With homework in hand you walk 20 meters to the bus. What are your distance and displacement?

    asked by Anonymous
  82. chemistry

    a sample of waterunder study was found to boil at 102c at normal temperature and pressure.is the water pure?will the water freeze at 0c. comment

    asked by anson
  83. geometry

    Suppose line PQ has endpoints P(2,3) and Q(8,-9). Find the coordinates of R and S so that R lies between P and S and line PR is congruent with Line RS which is congruent with line SQ

    asked by Jeremy
  84. Math

    what kind of math journals, essays, & projects you guys do in 7th grade math??? i'm really curious i saw the grading policy 2 my skool website here is the grading policy for math DISTRICT GRADING POLICY MATHEMATICS -70% FORMAL ASSESSMENTS (Tests, Quizzes)

    asked by Lily
  85. geometry

    line l bisects xy at M and divides xy into equal parts .name a pair of congruent lines

    asked by Anonymous
  86. math

    f(x) = 64 + 27cos(2pi/365(x+145)) what would be the period i tried by solving 2pi/(2pi/365) period = 365 but this doesn't seem right

    asked by Amy
  87. Math

    rays pq and qr are perpendicular. point s lies in the interior of

    asked by Matthew
  88. Calculus

    Please help me calculate these integrals. Suppose that Int 0->1 f(t)dt=11 . Calculate each of the following. A. int0->0.25 f(4t)dt= B. int0->0.25 f(1−4t)dt= C. int0.25->0.375 f(3−8t)dt=

    asked by Cady
  89. Physics

    A 90 kg skydiver moving at terminal speed falls 76 m in 1.03 s. What power in kW is the skydiver expending on the air?

    asked by Heather
  90. algebra

    the sides of a triangle are in the ratio 3:4:5.what is the length of each side if the perimeter of the triangle is 78cm?

    asked by briana
  91. Statisitics

    As a marketing analyst, you are responsible for estimating the level of sales associated with different marketing mix allocation scenarios. You have historical sales data, as well as promotional response data, for each of the elements of the marketing mix.

    asked by GG
  92. Seismology

    How much is the rate of seismic wave energy with distance?

    asked by Bubble
  93. English

    I tried to summarize briefly Scotland's history. Can you please have a look at it? Which form is correct: in 9th century/in the ninth century? 6th century (AD): 500-599 (is it correct?) 9th century (AD): 800-899 10th century: 900-999 1) The first

    asked by Henry2
  94. Statistics

    Consider the following multiple regression results. Using a= .05 as the significance level, identify all statistically significant predictors. In a relative sense, which variable has the strongest impact? What is the interpretation of the “constant”

    asked by GG
  95. English

    I have a research paper proposal due Wednesday, but no idea so far on how to begin. Is anybody there to help me?

    asked by achut dahal
  96. algebra

    simplify z-(2z-[3z-(4z-5z)-6z0-7z]-8z

    asked by babygirl
  97. maths

    the plane has seats for 420 passengers 15% of the seats are empty how many passangers are on the plane?

    asked by teemo
  98. math

    A farmer walks into a store and heads for the counter. On the counter is a basket of hard-boiled eggs. The farmer says to the cashier,"I'll take half of your eggs plus half an egg." The next day he walks in the store and says to the cashier,"I'll take half

    asked by Audrey
  99. social studies

    i need help with a U.S history question, how would i describe Roanoke? its an 8th grade U.S history question i need it FAST!!!

    asked by sam
  100. Algebra

    To pass a course you need an average score of 60 or more. If your scores are 66, 72, 90, 49, and 59, find the minimum score that you can get on the 6th and last exam to pass the course.

    asked by Melissa
  101. Physics

    In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the

    asked by Cecille
  102. algebra

    solve using the multiplication principle -3a

    asked by babygirl
  103. physics

    If a speeding car slams into a brick wall and comes to rest, how will the impulse that acts on it compare with gradually slowing down and coming to rest?

    asked by Allison
  104. ahemistry

    a sample of waterunder study was found to boil at 102c at normal temperature and pressure.is the water pure?will the water freeze at 0c. comment

    asked by anson
  105. algebra

    solve the equation and state if it an identity ( all real numbers) or a contradiction(no solution) 5x+6+6x=10x+6+y

    asked by babygirl
  106. calculus

    Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y, y=4sin(x), y=e^(7x), x=0, x=pi/2

    asked by mon
  107. math

    Mr Ahmad starts work at 11.40 on Tuesday.He works for 12h45min.When does Mr Ahmad finish his work?Express your answer usering the 24-hour clock

    asked by kimi
  108. Calculus

    Salary Contracy - A union contract guarantees a 10% salary increase yearly for 3 years. For a current salary of $28.00, the salary S (in thousands of dollars) for the next 3 years is given by... S(t)= 28.00, 0

    asked by CeeCee
  109. math213

    In each of the following, order decimals from least to greatest a.24,9419, 24.942, 24,94189, 24.94199 b.-34.25, -34.251, -34.205, -34.2519

    asked by Aisha
  110. Bussiness

    I have to find an article (magazine, newspaper, online) from a respected source of business / news content that addresses the impact of global trade on the global, U.S., or local economy. For printed articles, please scan and post as a PDF file. For online

    asked by Alice
  111. calculus 2

    find the volume of the solid obtained by revolving the region bounded by the graphs of y=2+4x-x^2 and y=2 about the line y=2.

    asked by hadia
  112. trig

    Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) I got 2pi/3 could someone tell me if that is right? And if not, could someone please explain how to get the answer.

    asked by Charles
  113. Subjects

    What's Content Support 7c ???? it says it in my schedule i'm going into the 7th grade this week plzzz answer also wat do u do ????? plzz answer plzzz i kno it's a helping class but do you learn the same thing in ur regular class ????? plzzz answer

    asked by Jenny
  114. statistics

    a pouch contains 97 green beads 72 red beads and 7 yellow beads. how many blue beads should be added so that the probability of drawing a red bead is 3/10 ?

    asked by laura
  115. Computer

    Do you guys know anything about making A website on wordpress my brother is asking this qs. plzz Thank You :)

    asked by Gen
  116. math

    Could you use only the millions period to order 462,409,524 463,409,524 and 463,562,391

    asked by Reina
  117. Physics

    A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before

    asked by Caylee
  118. statistics

    the breaking strength of a cable known to be normally distributed with a mean of 4000kg and a standard deviation of 25kg.The manufacture prefers that at least 95% of its products meet a strength requirement of 4050 kg.Is this requirement being met? If not,

    asked by shruti
  119. AgBio1

    Examples of Biotechnology? Risks and Benefits??? Thanks!:D

    asked by Kiersten
  120. Chemistry

    A mixture of He and CO2 in a flask at 45.0°C exerts a pressure of 955 torr. All of the CO2 is removed and is found to weigh 0.879 g. The pressure drops to 555 torr after the removal of CO2. What is the mass of He?

    asked by Kathy
  121. algebra

    1. solve using multipication principle -3a

    asked by babygirl
  122. Challenger institution of technology

    An airplane of mass 2800 Kg has just lifted off the runway. It is gaining altitude at a constant 2.3 M/s while the horizontal component of its velocity is increasing at a rate of 0.86 M/s2. Assume g= 9.81 M/s2. (a) Find the direction of the force exerted

    asked by John
  123. Psychology

    What are the stages of language production? Which one of these stages is the most crucial? Why? This is what I have thus far: Language production refers to the process involved in creating and expressing meaning through language. The four stages in

    asked by Linda
  124. accounting

    If you notice that your accounts receivable days outstanding has doubled in the first 6 months. Do you give someone a bonus or put hin or her on probation? Why?

    asked by pj
  125. MATH

    A farmer walks into a store and heads for the counter. On the counter is a basket of hard-boiled eggs. The farmer says to the cashier,"I'll take half of your eggs plus half an egg." The next day he walks in the store and says to the cashier,"I'll take half

    asked by Audrey
  126. English

    What do you do at the school's newspaper???? What kind of jobs do they assign???? Any artictles ideas ???? You i'm joining the school's newspaper cause i luv writing a lot :) plzz answer these question that will be very helpful & nice if you guys answer

    asked by Gen
  127. Computer

    What do you do at computer club (school club) ???? i'm just asking cause i'm also joining that club this yr check the school's website & no club info. just school adviser & what day of the meeting & rm # Thank You :) HAPPY LABOR DAY EVERYBODY !!!!! :)

    asked by Gen
  128. Algebra

    60 = (66+72+90+49+59+x)/6 Solve for x.

    asked by Melissa
  129. algebra

    solve the equation if it an identity(all real numbers) or a contradiction(no solution) so state 5x+6+6x=10x+6+y

    asked by babygirl
  130. statistics

    the breaking strength of a cable known to be normally distributed with a mean of 4000kg and a standard deviation of 25kg.The manufacture prefers that at least 95% of its products meet a strength requirement of 4050 kg.Is this requirement being met? If not,

    asked by shruti
  131. Math

    A ball is thrown off a cliff from a ht of 180 ft above sea level. The ht s of the ball above sea water level at time t is s(t)=-16t2+32t+180. When will the ball strike the water?

    asked by Milly
  132. physics

    If a stone is thrown upward at 29.7 m/s, what will be its velocity at a height of 12 meters?

    asked by Anonymous
  133. Math !!!!!!!!

    Ok i have a Summer Math Assignment & i really need help on this qs. it's part B of the qs. so i'll show you the whole thing Part 2. Extended Reponse Qs. (2 points each) Answer each qs.. Show all Work Qs. 5 Adrian correctly solved two equations in math

    asked by Gen
  134. chemistry

    What is empericle formul

    asked by Msafiry
  135. anatomy & physiology

    the portion of the nervous system that controls involuntary activities is a subdivision of the _______ nervous system? a) sympathetic b) central c)peripheral d) parasympathetic

    asked by AB
  136. History

    How did the social unrest of the 1960s take root in the 1950s?

    asked by Mary
  137. Physics

    When would instantaneous speed be the same as average speed? would it be when the speed is constant? when the position changes linearly with time or would it be in the limit when the time interval goes to zero? I thought it would be when the speed is

    asked by Katie
  138. Physics

    what is the volume of an object whos density is 2.2 g/cm^3 and has a mass of 50 g?

    asked by Erin
  139. English

    Can you check these last two sentences, please? 1)The old man’s eye was open, which made the narrator angry. However, he kept still and said nothing. 2) When he wakes up he can see the size of his prison and realizes that the pit is about half the size

    asked by Henry2
  140. chippewa

    FIND the ESTIMATE: 1) A RARE TRUFFLE ONCE SOLD FO $13.20 FOR A 0.44 OZ CAN. APPROXIMATELY HOW MUCH WOULD 1LB OF THIS TRUFFLE COST?

    asked by MAtt
  141. Math

    A video recorder costs $259 and Ann pays 25 down on da purchase price. If Ann makes 6 equal payments after da down payment, wat must she pay each month?

    asked by Sam
  142. Physics

    When would instantaneous speed be the same as average speed? would it be when the speed is constant? when the position changes linearly with time or would it be in the limit when the time interval goes to zero? I thought it would be when the speed is

    asked by Katie
  143. American History

    3. In dissent, Justice Harlan wrote the "real meaning" of the railcar segregation law was to suggest that "colored citizens are so inferior and degraded that they cannot be allowed to sit in the public coaches occupied by white citizens." How might we

    asked by Elizabeth
  144. math

    I am getting so confused with my math problems... Can you help me please?... The question is - Rounded to the nearest ten I am 800. I am not odd. All of my places have a value greater than 0. The number in my ones place is 1 less than the number in my tens

    asked by Jay
  145. science

    design an expirament to test if the price of the gasoline affects the mileage in my car. find the dependent variable.

    asked by julia
  146. English

    I forgot to include these last statements. Thank you. 1) Macduff confesses to Macbeth that he was torn from his mother's womb by a surgeon before he was due to be born. 2) Macbeth believes that the witches played (have played?) with him since their

    asked by Henry2
  147. Math

    I'm in Calculus AP and we are learning about limits. I'm having trouble with finding limits algebraically. So here's a sample that you can use to help explain this to me. Find the limit of lim x (arrow to the right) 1 x-1/x(squared)-1. Please help!

    asked by Michael
  148. Physics

    In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the

    asked by Cecille
  149. Science economic

    Cesium 138 has a half life equal to 32.2 minutes. how long will it take for 2/4 of this sample to decay

    asked by christine
  150. physics

    What is speed with direction known as

    asked by Akhilesh
  151. English

    I left out these other sentences. Thank you very much. 1) After the death of Elizabeth I of England, Mary Stuart’s son, James IV of Scotland, became James I of England. In this way the two countries were united for the first time. 2) In 1707 Scotland

    asked by Henry2
  152. Social Psychology

    The ways in which our self-perception is impacted by outside forces, some positive ways can be based on high academic achievement at school, positive results on the job that lead to affirmation from supervisors or even promotions, as well as even positive

    asked by Sharon
  153. Algebra

    x is directly proportional to y and is inversely proportional to the cube of z.

    asked by Rose
  154. calculus

    Find so that the following function is continuous on any interval: f(x)=kx 0

    asked by Anonymous
  155. English

    Can you please check these statements on Macbeth? Thank you. 1) Macbeth doesn't feel safe because he is obsessed with the witches' prophecy about Banquo. He is worried that Banquo's son will take his place. He decides to have Banquo and his son killed. 2)

    asked by Henry2
  156. Physics

    A car moving with a constant acceleration covers the distance between two points 80 m apart in 8.0 s. Its velocity as it passes the second point is 14 m/s.How far behind the first point was the car at rest?

    asked by Katie
  157. Maths

    May I please have help with this Calculate the following numbers into scientific notation 2500 nm – 7 pm

    asked by Anonymous
  158. Algebra

    Tell whether the sum is positive, negative, or zero. Explain n is positive and m is negative. n + (-m) is ?

    asked by Betty
  159. Math, Sci, S.S., English

    What's Content Support 7c ???? it says it in my schedule i'm going into the 7th grade this week (wednesday) plzzz answer also wat do u do ????? plzz answer plzzz

    asked by Gen
  160. PreCal

    Find the distance between P1(3, –195°) and P2(–4, –94°) on the polar plane. Round your answer to the nearest thousandth.

    asked by Jack
  161. Science

    Why does an ion have an electrical charge?

    asked by Sami
  162. English

    I left out a few more sentences I wrote on castles. I need a synonym for "ways, way" and a revision of sentence 2. Thank you very much. 1) Castles came to Britain with the Norman-French invaders. Indeed, castles were a key part of their way of controlling

    asked by Henry2
  163. Math

    invested 2000 gains 0.2 every odd numbered month final value after first month? i've tried solving this with a formula, but every formula i come up with is wrong. Could someone tell me how to solve this and plug in the right numbers into a formula?

    asked by Amy
  164. biology

    What happens to denatured enzyme? Explain the reason with the help of the lock and key model. -i can explain for the denatured enzyme but how can i expalin it in term of the lock and key model....

    asked by unni
  165. English

    I wanted to know of the various alternatives are possible? In question 5 I just wanted to know how I can calculate time before and after the birth of Christ. Thank you. 1)The Roman Emperor Hadrian had a wall built to keep the Scottish out. (to defend Roman

    asked by Henry2
  166. english

    this is what i got as a answer i was wondering if it is correct #1- It's borrowing to much language and just switching a couple of words so its still plagiarizing. Each of the following exercises shows the original source, and then a student’s sentence

    asked by mary
  167. Geometry

    The area of a rectangle is 54 centimeters squared. The side lengths are 2x+1 and x+2. What is the measure of each side

    asked by Edith
  168. Information Technology

    Hi! I am actually asked to create a cipher using NETBEANS to encrypt and decrypt messages.I have NEVER touched NETBEANS before and I am looking for someone to give me some information on how to run this cipher and the JAVA codes that should be generated in

    asked by Sivashen
  169. Algebra

    How do I graph how to raph -y>=4/3 (greater than or equal to) I don't understand what to do when the y is negative Any help would be greatly appreciated :)

    asked by Linda
  170. physics

    I'm suppose to draw velocity time and acceleration time graph for a rocket that is launched vertically into the air and falls back down to its initial height. We are to assume that x axis is up. So would I draw an curved figure like a downward parabola or

    asked by Jennifer
  171. Calculus

    What is the inverse function of.... f(x) = x^3 - 1 Whats the easiest way to solve this? Can I solve for 'x' first... Then switch 'x' and 'y'. Or do I have to switch 'x' and 'y' from the start?

    asked by Kathy
  172. math

    how do you get the answer for .33 divided by .375?

    asked by sunnie
  173. math

    what is z cube 3 plus z squared minus 7z-7 divide z squared minus 3z minus 4

    asked by candi
  174. geometry

    The base of a triangle is (x + 16)inches and its height is (x + 9) inches. If the area is 130 square inches,

    asked by Anonymous
  175. English

    I'm posting sentence 3 again for you to check. I'm includinga few other sentences. 1) Macbeth starts to be haunted by Banquo’s ghost. At the feast he becomes pale because he sees Banquo’s ghost sitting at his place. 2) The fifth act opens with the

    asked by Henry2
  176. Subjects

    What is National Jr Honor Socity ????? How do you get chosen ???? What do you REALLY do in it ??????? Also can you give me a pertange (srry i miss that i mean %) chart on grades plzz like wat 80 to 89 is that a B & a 3 ????? PLZZZZZ ANSWER !!!! :) :) :)

    asked by Gen
  177. immunolory

    what are mediators cells

    asked by yr
  178. Math !

    This is a good paragraph (i'll xplain) On the Line below, explain how you determined the type the type of quardrilateral ploted on the grid. (i follow the directions all i had to do is plotted the point which i got a trapazid) I determined the type of

    asked by Gen
  179. aging

    what type of government programs are avaliable in Japan also what are some societal views of the elderly in Japan? any sources would be helpful that i could look at thanks

    asked by Alice
  180. Chemistry

    What are the differences between "wet gases" and "dry gases?" Wet gas - contains H2O whereas Dry gas - does not contain H2O? Dry gas only contain Hydrogen?

    asked by Lee
  181. Legal Studies

    Hi beautiful people! I need help finding statistics on the rates of incarciration/fines or other punishments for person convicted of victimless crime in Australia. Preferably Queensland. This is urgent, I simply cannot find the information and I would

    asked by Em
  182. english

    Is this a run on or complete sentence? The desert is very hot during the day, the temperature in the desert may drop below freezing at night.

    asked by Kelly
  183. Spanish 1-Please check

    How do you say the class of economics and the class of anatomy in Spanish. I think it is la clase de economis y la clase anatomis. Accent should be over both (i's)

    asked by Shannon
  184. Subjects

    can you get castlelearning for free or i have ti make an accont on my school website i will be having one (teachers will assign students to go on it gave them the username & password) i'm just asking it is for free lik you don't have to make an accont or

    asked by Genny
  185. ag bio 1

    examples of how structure and function are related in an organism

    asked by Kiersten
  186. Subjects

    What points, or grades averge in order to pass the 7th grade ??? i'm just asking so that way i can know

    asked by Gen
  187. pre-calculus

    Find the intercepts of the graph of x^2 + y^2 + 4xy - 2x + 7y = 8

    asked by Amber
  188. algebra

    60 = (66+72+90+49+59+x)/6 Solve for x.

    asked by Melissa
  189. Botany

    Think of this example of an ecosystem: A large tree with grasshoppers, caterpillars and other animals eating the leaves, birds eating the leaf eaters, snakes eating birds and a hawk eating snakes. An energy pyramid that counts the number of organisms at

    asked by Joshue
  190. Science

    3) What is the net force needed to accelerate a 5800g object 6.2 ms-2 ? (make sure you have the correct units)

    asked by Anonymous
  191. TU

    what is the interest of $25,000, invested for 7yrs at 7% interest compounded

    asked by CC
  192. Algebra

    Tell whether the sum is positive, negative, or zero. Explain n is positive and m is negative. n + (-m) is ?

    asked by Betty
  193. math

    finding the average in a a cosine graph. would the average be the the middle of the y-axis for the graph? for example, for y = cos x would the average be 0

    asked by Amy
  194. algebra

    where do the brackets go 2 x 3 to the 3rd power + 4 to = 4374

    asked by greg
  195. Business Law

    Case study: A former employee enters his employer's place of business claiming that the company owes him $500 dollars in back wages. He argues with the manager, who then orders him off the premises. He refuses to leave, so the manager tells some other

    asked by Nieci
  196. English

    How do i find the theme of a book/movie?

    asked by Sam
  197. MATH help

    sketch + describe graph of the curve parametrized by: x=1-3cos^(2)t y=-2+4sin^(2)t -infinity less than t less than infinity how would i go about solving this. i know that usually i can solve for t and than plug that in. But for this, i tried using cos^2 +

    asked by Amy
  198. math (please help)

    f(x)=-(x-1/2)^2(x+1) How to find the y-intercept of the function?

    asked by Kate
  199. Subjects

    Will i get a lot of homework in middle skoo ????? here r my classes Math F.A.C.S. Art Sci English Content Support 7c Gym Social Studies also if i did what to do ???? need tips ???? plzzz answer

    asked by Jenny
  200. algebra

    solve 17/35=-x

    asked by babygirl
  201. algebra

    4(2x-y)+2(y+3x)

    asked by Anonymous
  202. English

    is bullying is the main theme for The Skin I'm In ??? if it not the only one then r they any other theme for it

    asked by Jess
  203. com/156

    some red flag that indicate you should avoid particular souces

    asked by Anonymous
  204. math

    for piecewise functions do I connect all the functions? Ex: f(x): 2+x x less than or equal to -3 f(x): x^2 -3 less than x less than 1 f(x): 6 1 less than or equal to x I graphed this but I don't know where to connect the lines between f(x):2+x and f(x):

    asked by Amy
  205. science

    You have 10 ml of a 1:10,000 solution of hydrogen peroxide (H2O2). What is the molar concentration of the solution?

    asked by Marcus
  206. math

    Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. Determine n(A) n(B) P(A) P(B) P(A|B) P(B|A)

    asked by Anonymous
  207. math

    I have a few other problems that I can't seem to understand... Question: Rounded to the nearest ten. I am 12,750. I am a multiple of 2. I use only 4 different number's in my 5 places... :-o

    asked by Jay
  208. chemestry

    what effect over the density of a soda will have the next changes: 1)fresh soda used (not flat) 2)diet soda accidentally dilluted with distilled water 3) regular soda accidentally dilluted with distilled water electronic balance always measures too high.

    asked by Pat Rick
  209. Math

    How do you make the answer 10 using the numbers from either set only once in any order? set 1) 5, 6, 2 set 2) 3, 4, 6

    asked by Judy
  210. MATH

    invested 2000 gains 0.2 every odd numbered month gains 0.15 every even numbered month write function for n months? i've tried solving this with a formula, but every formula i come up with is wrong. Could someone tell me how to solve this and plug in the

    asked by Amy
  211. Science

    Can you give me a list of science fair topics something that relates art (lik markers blah blah blah) i want to do something kool this year for the sci fair plzzzz answer plzzz

    asked by Gen
  212. AgBio1

    how is a biosphere and ecosystem related? :o

    asked by Kiersten
  213. biology

    I need to describe the processes of fatty acid oxidation and synthesis in animal tissues, pointing out their similarities and differences. Please! I don't need an answer that is just copied and pasted from another website... Thanks,

    asked by steve
  214. Math please help!

    invested 2000 gains 0.2 every odd numbered month gains 0.15 every even numbered month write function for n months? i've tried solving this with a formula, but every formula i come up with is wrong. Could someone tell me how to solve this and plug in the

    asked by Amy
  215. algebra

    what is 2/9 times b/9

    asked by jasmyn
  216. astronomy

    what good has astronomy produced?

    asked by Varia
  217. math

    4[2(3+5)+10}

    asked by jami
  218. Math

    How do you make the answer 10 using the numbers from either set only once in any order? set 1) 5, 6, 2 set 2) 3, 4, 6

    asked by Judy
  219. algebra

    2(x-1) is greater than or = to (2x-9) whats the answer?

    asked by CP
  220. metric measurement

    2,400cm = what in meters

    asked by Heather