Questions Asked on
February 21, 2011

  1. physics

    Archer pulls her bow string back 0.4 m by exerting a force that increases uniformly from zero to 230 N. What is the equivalent spring constant of the bow? This is what I did: F = kx 230 N = k(0.4 m) 575 = K My question is this: Is the answer just 575 or is

    asked by Nabil
  2. Math-Statistics

    It appears that people who are mildly obese are less active than leaner people. One study looked at the average number of minutes per day that people spend standing or walking. Among mildly obese people, minutes of activity varied according to the N(373,

    asked by Kerry
  3. Chemistry

    Calculate the pH of (1)0.150M KC2H3O2: (2)0.200M pyridine chloride, C5H5NHCl: and(3) 0.500M NaCl

    asked by Joshua
  4. Physics

    How do you solve this problem? A ball on the end of a string is revolved at a uniform rate in a vertical circle radius of 72.0 cm, as shown in figure. If its speed is 4.00m/s and its mass is .300 kg. Calculate the tension in the string when the ball is a)

    asked by Emily Grossman
  5. Chemistry

    How many mL of a 10.0% by volume stock solution of HCl must be diluted with enough water to make 300.mL of a 1.5% by volume solution?

    asked by Kelli
  6. Physics

    During a baseball game, a batter hits a pop-up to a fielder 82 m away. The acceleration of gravity is 9.8 m/s2 . If the ball remains in the air for 6.9 s, how high does it rise? Answer in units of m.

    asked by Aditya
  7. world history

    How did the Renaissance contribute to the Age of Exploration? by emphasizing the importance of converting people to Christianity by awakening a spirit of discovery and innovation in Europe by fostering a belief in the importance of working as a group by

    asked by Tom
  8. Calculus - Functions?

    #1. A cubic polynomial function f is defined by f(x) = 4x^3 +ax^2 + bx + k where a, b and k are constants. The function f has a local minimum at x = -1, and the graph of f has a point of inflection at x= -2 a.) Find the values of a and b #2. Let h be a

    asked by Amy
  9. World Geography

    Which statements describe the European Union (EU)? 1) Citizens of EU nations can live, work, or study in any member nation. 2) Passports must be presented by citizens when traveling between EU nations. 3) Tariffs between member nations were ended in 1968.

    asked by kadi
  10. Art

    Hi- I have to do an Art analysis on 'Diamond Dust Shoes' by Andy Warhol, and am a bit stuck on the part "what do you think the artist was trying to say?" I am in yr 8, and was wondering if anyone had any suggestions :) Thank you!

    asked by Catherine
  11. Physics-Optics

    A point source of light illuminates an aperture 4.00m away. A 18.0 cm -wide bright patch of light appears on a screen 2.00m behind the aperture. I have been trying to use the equation w=(2*wavelength*distance)/aperature width. However, I am not given

    asked by Jessica
  12. Math, Stats

    the probability is 0.6 that a person shopping at a certian store will spend less than $20. For group of size 19, find the mean number who spend less then $20.

    asked by Olivia
  13. Physics

    How to solve/ work this problem? If a curve with a radius of 88m is perfectly banked for a car traveling 75 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 95km/h?

    asked by Emily Grossman
  14. chemistry

    How many grams of solid KOH are needed to prepare 100.mL of a 1.7 M solution?

    asked by Kelli
  15. Physics

    Please, help me with this problem... im a bit confused abt solving it.. In a tank of volume V=7.5 L, temperature T=300 K, there is a mix gases: n1=0.1 mole of oxygen, n2=0.2 mole of nitrogen, n3=0.3 mole of carbon dioxide. Considering the gases ideal,

    asked by Gyuzal
  16. physics

    A string is tightly stretched between the point A-G at point C it's lightly pinch and point B it's plucked, at points DEF are light folded tissue paper the segments A to BB to CC to DD to E and EG are all equal in length, what happen to the tissue paper

    asked by Catherine
  17. Math

    A department store is holding a drawing to give free shopping sprees to two lucky customers. There are 15 customers who have entered the drawing: 4 live in the town of Gaston, 6 live in Pike, and 5 live in Wells. In the drawing, the first customer will be

    asked by Rachal
  18. Chemistry

    Calculate the pH of (1)0.150M KC2H3O2: (2)0.200M pyridine chloride, C5H5NHCl: and(3) 0.500M NaCl

    asked by Joshua
  19. history

    How did the Vietnam War, and the domestic opposition to it, come to dominate American politics in the 1960s?

    asked by carol
  20. psychology

    explain the relationship between learning and memory.

    asked by tanya bush
  21. chemistry

    A particular kind of emergency breathing apparatus-often placed in mines, caves, or other places where oxygen might become depleted or where the air might become poisoned-works via the following chemical reaction: 4KO2(s)+2CO2(g)--> 2K2CO3(s)+3O2(g) Notice

    asked by Jake
  22. Chemistry

    The intravenous dosage of mannitol is 1.5g/kg, administered as a 15% mv solution. How many ml of the solution should be administered to a person with a body mass of 85kg?

    asked by Mike
  23. Physics

    A lower block is being pulled to the right across a wooden table and it is 5kg and the block on top of it weighs 2 Kg. The friction between the table and the lower block is reduces the total acceleration to be 1.5 m/s2. Friction keeps the upper block

    asked by Paige
  24. chemistry

    Combustion analysis of 1.200 gram of an unknown compound containing carbon, hydrogen, and oxygen. What is the empirical formula of the compound?

    asked by Anonymous
  25. english 101

    review the concept of fallacies and suggest ways to avoid fallacies in your expository essay on healthy eating.

    asked by sarah
  26. Pyschology

    what does this mean? psychology is uniquely qualified to help intervene? I also would like you to comment on what are at least two key ways psychology is uniquely qualified to help intervene.

    asked by Lee
  27. Stats

    If the true population standard deviation was known to be 3, then approximately what minimum sample size would you need in an SRS (simple random sample) if you want a confidence interval for the margin of error of .5 or less?

    asked by Anonymous
  28. Math, Stats

    the probability is 0.6 that a person shopping at a certian store will spend less than $20. For group of size 19, find the mean number who spend less then $20.

    asked by Olivia
  29. Physics

    "An alpha particle (a helium nucleus) is traveling along the positive x-axis at 1 250 m/s when it enters a cylindrical tube of radius 0.500 m centered on the x axis. Inside the tube is a uniform electric field of 4.50 X 10^-4 N/C pointing in the negative y

    asked by Anonymous
  30. Chemistry-help needed

    Can we use an ACS/AR grade chemical for UV spectrophotometric analysis? Or is it a must to use a chemical that is specially designated (SpectrAR grade) for UV analysis?

    asked by candy
  31. physics

    1.A stone fired straight upwards from the top a 50m high bridge fall into water below it 12seconds later.what was its initial velocity? how high above the bridge did it go?

    asked by Hope katanga
  32. geometry

    Two cyclists set off at the same time from a point o .Cyclist p head east with a velocity of 20km/hr. Cyclist Q heads with a velocity of 16km/h .After 45 min they both stop calculate a) the distance they have each travelled in 45 min . b) the distance ox

    asked by reshma
  33. math

    Write the integer that is represented by a point midway between -76 and 76 on the number line. Choose a nonzero integer for n to show that –n can be evaluated as a positive number. Scoring in Golf. A golfer played 8 rounds on a tournament course with the

    asked by Anonymous
  34. science

    The following is current scientific evidence supporting the nebular theory on the formation of the solar system.' a the composition of the inner and outer planets, current observations of star formation, and the motion of the solar system b current

    asked by Anonymous
  35. calculus

    Consider the graph of y2 = x(4 − x)2 (see figure). Find the volumes of the solids that are generated when the loop of this graph is revolved about each of the following

    asked by ben
  36. Physics

    A 5 kg block is attached via a rope to a dangle 2kg mass. Consider the case without friction. What angle would the ramp be for the 5kg block to experience zero acceleration?

    asked by Paige
  37. physics

    Estimate the speed of the parachutist descending at the constant velocity with open parachute. Assume the area of the parachute, A = 30 m^2, mass of a person, m = 100 kg, and density of air, roh = 1 kg/m^3. Enter the answer limited to the second decimal

    asked by Anonymous
  38. Calculus for Business students

    A hospital performs 3 types of operations. The first type takes 30 minutes, and they charge $700 for it. The second type takes 1 hour, and they charge $1050 for it. The third operation takes 2 hours, and they charge $1400 for it. The hospital can schedule

    asked by Sarah
  39. chemistry

    A particular kind of emergency breathing apparatus-often placed in mines, caves, or other places where oxygen might become depleted or where the air might become poisoned-works via the following chemical reaction: 4KO2(s)+2CO2(g)--> 2K2CO3(s)+3O2(g) Notice

    asked by Jake
  40. Calculus Please Help

    Given the numerical values shown for the function f(x), find approximate values for the derivative of f(x) at each of the x-values given. x= 0 1 2 3 4 5 6 7 8 f(x)= 13 15 16 17 17 14 11 9 7 f'(x)= 2 1 1 1 0 -3 -3 -2 -2 What seems to be the greatest rate of

    asked by Celine
  41. medicla terminology

    what are the benefits and disadvantages of using medical terminology in medical office management?

    asked by Anela
  42. Math

    Penny has been hired to paint 5 bulletin boards at her school. To calculate the amount of surface she needs to paint, she multiplies the length of one side of one bulletin board by itself and then multiplies the product by 5. Based on Penny's calculations,

    asked by Emelie
  43. math

    5000 to the power of 5

    asked by super
  44. physics gr 12

    A flower pot is dropped from the balconey of an apartment 28.5 metres above the ground. At a time of 1 second after the pot is dropped a ball is thrown vertically downwards from the balconey one story below 26 metres above the ground. The initial velocity

    asked by just wondering
  45. General Chemistry

    Methanol is produced as the sole product of the combination of carbon monoxide gas and hydrogen gas. If 3.12X103 kg of methanol are actually produced, what is the precent yield if you start with 430.0 kg of hydrogen gas?

    asked by Samm
  46. econ

    Suppose Jean Splicer, an investor, buys $100,000 of shares of stock in a diversified bundle of Bio-tech firms and exactly one year later sells those shares for $108,000. If the value of the CPI at the date of Jean's purchase was 160, and rose by the sale

    asked by john
  47. US History

    Why was control of the seas so important for the Allies and the Axis?

    asked by Kaylee
  48. Physics

    A 5 kg block is being pulled to the right with a 20 N force. This causes the block to slide along the table with an acceleration of 2 m/s2. What is the coefficient of kinetic friction between the block and table?

    asked by Paige
  49. Anthropology

    Why is there a conflict between evolutionists and creationists?

    asked by Alex L.
  50. physical

    I hv been try to do but...calcu the GPE of a roller coaster car points B is 5m/C 3,2m nd C 9,8 also D...

    asked by Zanele
  51. Algebra

    The $75 cost for a party was to be shared equally by all of those attending. Since five more people attended than was expected, the price per person dropped by 50 cents. How many people attended the party?

    asked by Andrew
  52. statistics

    Ms. Kim Mooney in 1989 as part of completing her dissertation at UNH. The dataset was collected to assist in exploring the relationship between the “effect of social stress on blood pressure.” This was investigated by collecting data at six different

    asked by Jamar
  53. Social studies

    Pro and Cons b/w a principal and the president

    asked by Gloria
  54. physics

    A book on a shelf 2.0 meters above the floor has a mass of 1.5 kilograms. What is the gravitational potential energy of the book?

    asked by Sadie
  55. geometry

    The rectangular label will completely cover the lateral surface of the can using as little paper as possible. If the can has a height of 8 cm and a diameter of 7 cm, then what are the width and length (to the nearest centimeter) of the label?

    asked by Emma
  56. Physics

    A car travels around a circular track (4 km diameter). Its tires have frictional coefficients: mS = 0.3 & mK = 0.2. If the track is flat, how fast can the car travel around the track and still maintain control?

    asked by Paige
  57. Physics

    Three weights are attached to the corners of an equilateral triangle (side length 10 cm) made from stiff but very light wire. Measured from the bottom left corner, what is the center of mass of this object if M1 = 0.1 kg, M2 = 0.2 kg, and M3 = 0.3 kg?

    asked by Paige
  58. Physics

    A block is sitting on a ramp. The block feels a force of friction sufficient to keep it from sliding down the ramp, which makes an angle of 30 degrees w.r.t. horizontal. What is the minimum coefficient of static friction between the block & ramp?

    asked by Paige
  59. Physics

    A 5 kg block is being pulled to the right by a rope which is attached to a dangling 2 kg mass. The coefficient of kinetic friction between the mass & table is 0.1 What is the tension in the rope?

    asked by Paige
  60. Physics

    The gravitational force between two objects is proportional to what

    asked by Paige
  61. Math Trivia

    1) A school has 1-- closed lockers. Larry comes into the school and "toggles" every second locker, then Fred toggles every 3rd, Bob every 4th, etc, up to Zoe who toggles every 100th locker. After all this"toggling" how many lockers are open? 2) If you take

    asked by Josh
  62. Physics

    The gravitational constant for Earth is gE = 9.8m/s2. The gravitational constant for the planet Mongo is 20 m/s2. If an object has a mass of 10 kg on earth, what is its mass on Mongo?

    asked by Paige
  63. Pre-cal/Trig

    (tan/(1+sec)) + ((1+sec)/tan) = 2csc (Show all work please.)

    asked by Katherine
  64. Physics

    The gravitational constant for Earth is gE = 9.8m/s2. The gravitational constant for the planet Mongo is 20 m/s2. If an object has a weight of 10 lbs on earth, what is its weight on Mongo?

    asked by Paige
  65. maths

    Can anyone help with te following please The total volume V(x)cm^3of a container is given by V(x)=4(x+ãx(8-x)) (

    asked by Claire
  66. precalculus

    Hi does anyone know how to solve this equation into parabola form? thanks x^2 + 2xy +3y^2 = 9

    asked by jane
  67. english 101

    how do you plan to support this thesis on healthy eating

    asked by pat
  68. Elements of University Composition and Communicati

    Each of the following sentences has one grammatical error. The errors are in one of the following four categories: subject–verb agreement, run-on sentence, verb form and tense, or sentence fragment. Read each of the sentences and write the type of error

    asked by Meaghan
  69. Advertising-HELP

    I need an advertisement which hasn't been banned yet, but that you think should be banned. I don't really pay attention to ads, so I don't know which ones should be banned. I actually have to write a complaint letter on one. Advertising-HELP - Kate,

    asked by Celina
  70. physics

    A 3.3 kg brick is falling at a rate of 35.1 m/s toward the earth at a current height of 14 m. What is the total mechanical energy of the brick?

    asked by Anonymous
  71. MATH

    In Jessica's art class, the ratio of girls to boys is 3:2. If there are 25 students in the class, how many more girls are there than boys?

    asked by Anonymous
  72. Physics

    How do you solve this problem? How fast (in rpm) must a centrifuge rotate if a particle 9.00cm from the axis of rotation is to experience an acceleration of 115,000 g's?

    asked by Emily Grossman
  73. Math

    4a-1-2a = 5+3(2a-6)

    asked by Anono.
  74. Math

    4a-1-2a = 5+3(2a-6)

    asked by Anono.
  75. heart

    how long does it take to design, test, and get FDA approval of an artificial heart valve?

    asked by Allie
  76. Math

    Suppose that the number of bacteria in a certain population increases according to an exponential growth model. A sample of 2600 bacteria selected from this population reached the size of 2873 bacteria in two and a half hours. Find the continuous growth

    asked by Rachal
  77. pre algebra

    how do you solve 10(-2x+1)=19(x+1)

    asked by Amber shall
  78. pre algebra

    how do you solve 10(-2x+1)=19(x+1)

    asked by Amber shall
  79. pre algebra

    how do you solve 10(-2x+1)=19(x+1)

    asked by Amber shall
  80. Science

    What type of plate boundary is located at the Juan de !@#$%^&a plate and Washington state on the north American plate?

    asked by Bob
  81. Algebra 2

    I am having trouble with my last two word problems on a homework assignment. For some reason I just can not get word problems and get frusterated. I hope someone can help. Alan was able to rent a moving van for $99 with unlimited mileage or $49 plus .80

    asked by Monica
  82. Physics

    What thrust does a 350 model rocket need in order to have a vertical acceleration of 14.0 on the Earth?

    asked by Mike aloe
  83. English

    I need to know which alternatives (?) sound best. Thank you. 1) Describe what living and working conditions for slaves in 19-th century America were like. Refer then to when slave trade was banned from US (or the United States or America). 2)Describe the

    asked by Mike
  84. Socialogy

    a. How can social stratification possibly lead to prejudice and/or discrimination towards others? b. Compare and contrast prejudice and discrimination in at least three different ways. c. How can the three sociological perspectives (i.e., social

    asked by Candie
  85. World cultures

    What are the five main regions of Africa? I looked it up but, all of them say south, north, central, west, and east Africa

    asked by Valeria
  86. physics

    A boy travels in a boat at angle of 30 degrees to the river bank.if he travels 250m before reaching the opposite,calculate the width of the river

    asked by Matika
  87. Chemistry

    You have a stock solution of 14.4 M NH3. how many mililiters of this solution should you dilute to make 1050mL of .220 M NH3 answer 16.o mL Question if you take a 10.5mL portion of the stock solution and dilute it to a total volume of .600L, what will be

    asked by Natalie
  88. Math

    14-x=-8x+42

    asked by Anono.
  89. Math

    14-x=-8x+42

    asked by Anono.
  90. College Algebra

    A farmer wants to build a rectangular fence using the side of his barn as one side. He has 200 yards of fencing available. Find the maximum possible area he can enclose with the fence.

    asked by Anonymous
  91. math

    Write and solve the number sentences she could use. Ms. Cloudcover, the TV weatherperson, noted that Sunday’s temperature was 12, much warmer than the -7 on Friday and the -2 on Saturday. She remembered that Thursday’s temperature was 0 and checked to

    asked by Anonymous
  92. Physics

    Please help ~ Two blocks are arranged at the ends of a massless string as 3.21 kg (box hanging from table) 4.96 kg (box on table). The system starts from rest. When the 3.21 kg mass has fallen through 0.4 m, its downward speed is 1.27 m/s. The acceleration

    asked by CR
  93. math

    What is the expanded form for 17,500 mph

    asked by Dalida
  94. english

    Please explain usage of " ATLEAST "in degrees of comparision.

    asked by soumya
  95. Algrebra

    How do you write the rule for: y=3x+4 for x=8

    asked by Amanda
  96. Algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. x + 10y = 41 x + 9y = 37

    asked by Betty
  97. Kinesiology

    Assume that a muscle is having a force of 300N is pulling at an angle of 75 degrees. What are the components of the force both the trigonometric method and graphic method.

    asked by Jon
  98. math

    Having trouble with these pairs of numbers (20,21,29) - (28,45,53) I am supposed to develop a Pythagorean triple. Here is that I am supposed to use which is a formula that can be used to generate infinite number of generating Pythagorean triples is: a =

    asked by Dave
  99. science

    what is a dependent varible

    asked by Anonymous
  100. precalc

    If is vector a ia 7 units long, the magnitude of vector b is 10 units and the cosine of the angle between the two vectors is -0.3 when they are placed tail-to-tail, what does the inner product of vector a and vector b equal?

    asked by anna
  101. Physics

    How to solve/work problem? Two objects attract each other gravitationally with a force of 2.5 * 10^-10 N when they are .25m apart. Their total mass is 4.0kg. Find their individual masses.

    asked by Emily Grossman
  102. Chemistry

    Ni+2 + SCN- Ni(SCN)+ A reaction flask initially contains .0006 Ni+2 and .00002 M SCN-. AFter equilibrium is reached, it is found that the concentration of Ni(SCN)+ is 6.0x10^-6 M. Complete an ICE box table.

    asked by kappie
  103. Cost acconting

    (underapplied or overapplied overhead) At the end of 2010, jackson tank company's accounts showed a 66,000 credit balance in Manufacturing Overhead control. In addition, the company ahd the following account balances: Work in process inventory 384,000

    asked by Anonymous
  104. chemistry

    how many moles of gas are contained in a 50.0L cylinder at a pressure of 100.0 atm and a pressure of 35 C?

    asked by donna
  105. health

    what are 9 parts of the female and male reproductive system that are either exactly the same of similar

    asked by Anonymous
  106. Physics

    A 100.0 W light bulb hangs from the ceiling. What is the visible light intensity on the floor, 2.1 m directly below the bulb, if 10% of its output is visible light? So I am attempting to use: I= Power/area however, I don't have a radius. I know 10% of 100

    asked by Lynn
  107. English

    I am writing a paper and am wondering what the proper way is to write a sentence from a different language and then to put a translation. For example: My aunt said, "mune pani joveche" (I want water). Would that be the right way to write it?

    asked by Skibba
  108. Calculus

    find the derivative of 4x(lnx+ln9)-9x+e

    asked by Sophie
  109. Physics please help urgent!!

    a collision between two pucks on an air-hockey table. Puck A has a mass of 0.025 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.060 kg and is initially at rest. The collision is not

    asked by Anonymous
  110. algebra

    The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, and 140 points in the second half of the course. If a student earns 81% in the

    asked by peg
  111. algabra

    Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard from, as^2+bx+c=0 the solutions are (-3,1)

    asked by Mary
  112. Statistics

    A sociologist is testing the null hypothesis that the percentage of school superintendents who earn an annual salary of more than $150,000 is greater than or equal to 50%. The sociologist conducts a poll of 1100 randomly selected superintendents and finds

    asked by Rina
  113. abnormal psychology

    Rani is a member of a tribe of Indians in the rain forest of south america.The tribe's witch doctor believes that Rani is possessed by the spirit of a demon wolf and in order to be cured he must undergo an exorcism.Which type of explanation of

    asked by vedrana
  114. chemistry

    Calculate the pH in a 0.00500 solution of NaOH.

    asked by JC
  115. physics

    A 10-kg duffle bag is undergoing a vertical acceleration of 0.65 m/s2 (positive for up, negative for down), while its owner is holding it with an upward force. What is the magnitude of this force?

    asked by sabeen
  116. Math SOmeone please please help

    Find the derivative of the function. g(u) = (5+u^2)^5(3-9u^2)^8 Could someone please explain the steps that would lead me to the answer? I'm completely stuck.

    asked by Anonymous
  117. chem

    Complete the table below: Answer the following for a body centered unit cell. (Hint: Helpful information can be found by going to the "Lattice" menu, choosing "Cubic", and then choosing "Body-Centered" in the Crystalline Solids program.) Crystalline Solids

    asked by brian
  118. physics

    A physics professor lifts her 8.2-kg briefcase at constant speed with an upward force. Find the magnitude of her force. answer in newtons.

    asked by khan
  119. statistics

    Suppose a basketball player, Player A made 80% of her free throws last season and that she continues to shoot free throws at the same rate. Assume that free throw attempts are independent. Let the random variable X be the number of free throws that player

    asked by Alex
  120. trigonometry (MathMate)

    MathMate i would really appreciate if you can show me where the logarithms can be used.I know they are unnecessary and I already found the answer without them but i still have to show my work using logarithms and they just confuse me. I also have most

    asked by anon
  121. Chemistry

    For the weak acid HX, what is the pH of a 0.10 M solution if the acid is 4.0% ionized?

    asked by JC
  122. calculus

    equation of the tangent line to the curve y = 2x²-x+10 at the point (-1,13)

    asked by Anonymous
  123. math

    gcf of 8/2

    asked by samria
  124. trigonometry

    1. Finde the area of the following tringles: (use Logarithms) A) a=12.7, b=21.5, c=28.6. i'm not of the answer i got. i got 127.6 if you got something different can you show me how you did while using logarithms.

    asked by anon
  125. Physics

    In the figure below, two blocks are connected over a pulley. The mass of block A is 12 kg, and the coefficient of kinetic friction between A and the incline is 0.22. Angle θ is 30°. Block A slides down the incline at constant speed. What is the mass of

    asked by Ben
  126. physical science

    If 22 grams of water are saturated at 75 degrees celsius with potassium nitrate and then cooled to 40 degrees celsius, how much will precipitate?

    asked by chris
  127. business

    4. List at least three steps that make-up a workable plan and explain why each is important.

    asked by candy
  128. Math

    4a-1-2a = 5+3(2a-6) AND 3(10+4y) = 6+6y

    asked by Anono.
  129. Calc

    If the substitution u=x^2 + 1 is made, then the integral from 0 to 2 of [(x^3)/(x^2 + 1)]dx = ? Thank you for your help!

    asked by Erica
  130. physics

    to find velocity v? c=3*10^8 0.99=(1-v^2/c^2)^1/2

    asked by vera
  131. economics

    where can I find current gross domestic product percentages to consumption, investment, defense and foreign trade for Germany & Switzerland for the past five years so I may analyze the info

    asked by Eileen
  132. chemistry

    assume the diameer of a neutral helium atom is 1.40 x 10 to the second power pm. suppose that we could line up helium atoms side by side in contact with one another. how many atoms would it take to make the distance from end to end 9.00cm

    asked by Anonymous
  133. physics

    Micah and Will watched a skater skate at a steady speed around a oval rink.Micah said the skater had no acceleration.Will said that the skater was accelerating.Who is right?Explain your reasoning.Be sure to describe how the skater's motion and velocity

    asked by dadelissa
  134. physics

    A transverse wave, frequency 15.0 Hz, travels along a string. Distance between a crest and an adjacent trough is 3.50m. What is its wavelength?

    asked by Taira
  135. Calc

    Let f(x) = x^3 - 7x^2 + 25x - 39 and let g be the inverse function of f. What is the value of g'(0)?

    asked by Erica
  136. Math

    Ues the Gaussian elimination to find complete solution to the equation or show that none exist 5x+12y+z=10 2x+5y+2z=-1 x+2y+-3z=5

    asked by Tonya
  137. trigonometry

    how can i find the anti-logarithm of this number. 5.07843058944 it should be 59477.5 can show me how.

    asked by anon
  138. algebra 2

    A electrician charges $50 for the first half-hour of work and $30 each hour for additional time. Stoney Point High School budgeted $200 to repair the refrigeration system. What length of service call with the budget not be exceeded?

    asked by Monica
  139. English

    It contains 15% sulphates and 30% chlorides. Is this sentence grammatically correct?

    asked by Abirami
  140. physics

    Calculate the impulse that must be imparted to stop a 5.0kg object traveling at 8.0 m/s? If the object came to a stop in 10 s, what is the magnitude of the stopping force?

    asked by anonymous
  141. Chemistry 11

    Calculate the number of moles of Carbon in 27.6g C4H9OH.

    asked by Lorraine
  142. Calc

    If n is a positive integer, find the limit as n approaches +∞ of 1/n(sin (π/n) + sin (2π)/n + ... + sin (nπ)/n)

    asked by Erica
  143. Physics

    ‎1. A 3kg body moving towards the east with a speed of 5 m/s collides with a 2kg ball originally at rest. After the collision the 3kg body moves in a direction of 25 degrees N of E. If the collision is perfectly elastic Find: a) the magnitude and

    asked by Sean
  144. Science

    A liquid has a volume of 100mL. It is placed into a different container and its volume is 1L. What can you conclude about how this liquid changed?Explain.

    asked by Callie
  145. trigo

    in a right triangle XYZ where right angle at angle X, if z= 14 and angle Y = 27.7 degree. Find angle Z, side x and side y.

    asked by sheosono
  146. physics

    the coefficient of restitution between the ball and the floor is 0.60 If the ball is drop from rest at the height of 6.6 m from the floor. Find a) what is the maximum height will the ball attain after the first bounce. b) how much kinetic energy is lost

    asked by robert
  147. physics

    thanks for solving my question pasted on dated 18.02.2011 at 10.20.pm.2nd question. a wt lifter lifts a wt of one kg against force of gravity through a distance of .8 mtr. how much cals he will burnt from the food he had taken.

    asked by ajmer singh sidhu ludhiana
  148. Math

    what is 210-x=100 ?

    asked by Jazmine
  149. GEOMETRY

    The present height of the pyramid of Khafre in Egypt is 137m.An engineer surveying pyramid measures an angle of elevation of 33degrees from a point X to the top of the pyramid. Calculate the distance from X to the cenre of the base of the pyramid at Y

    asked by reshma
  150. Reading

    I didn't read a book for reading and i need to do a clue map stating the clue and what suspect it lead to.. help! the book is Nancy Drew and the Mystery of the Glowing Eye.

    asked by Sam
  151. literature-help me PLEASE?

    how does Eudora Welty use dialogue to establish characters and character relationship in A Visit of Charity?

    asked by Vivian
  152. English

    Can you please check if these sentences are possible? Thank you. 1) Refer then to the episodes which lead to the abolition of slavery. 2)Lord Henry is a symbol of hedonistic and decadent upper classes, despising the Victorian virtues of work and morals,

    asked by Mike
  153. math

    Calculate the answers |-3-|-7-7|| Does |n+m| = |n|+|m| for all integers na and m? If so, give some examples. If not, give a counterexample. The Weathertalk Analysis Problem. Read the following story about the TV weatherperson and identify as many places as

    asked by bubba
  154. geometry

    if ac = 2x + 13 and db =4x - 1, what is db

    asked by Steven
  155. Networking

    I need to design a fully switched network for a 3-story retail building. Management on second floor (36 workstations), Sales on the 1st floor (20 workstations) and warehouse in the basement (35 workstations). My SOW and Network diagrams must consist of the

    asked by Trish
  156. math

    Simplify as indicated. State at least one property of multiplication or division that would prove your simplification process correct. a. –(n + 4), to eliminate the parentheses b. 6(-s), to eliminate the parentheses c. 8(24 – n), to eliminate the

    asked by makenzie
  157. algebra

    You are planning to spend no less than $6,000 and no more than $10,000 on your landscaping project. Write an inequality that demonstrates how much money you will are willing to spend on the project.

    asked by Carly
  158. math

    Simplify as indicated. State at least one property of multiplication or division that would prove your simplification process correct. a. –(n + 4), to eliminate the parentheses b. 6(-s), to eliminate the parentheses c. 8(24 – n), to eliminate the

    asked by makenzie
  159. math please help

    multiplying a number by 6/4 is the same as dividing it by? is it 3/2 or 4/3

    asked by hunter
  160. Smartphone Help

    This is an assignment in which I have to list down Requirements, advantages, and disadvantages of a smartphone. These are the requirements needed. -send and receive phone calls -send and receive texts -on screen keyboard or physical keyboard -can tether a

    asked by Anonymous
  161. art

    Explore the daguerreotype process at The Metropolitan Museum of Art website: In your opinion, what is the most significant difference between the daguerreotype process and modern photography? How do early and modern photos differ in the creative process of

    asked by bubba
  162. math

    if today is tuesday and i first bent over backwords 563 days ago, then on which day did I first bend over backwords? sat,wed, tues or friday?

    asked by hunter
  163. Math

    To find out hw much inches are in 9.5 feet, do I do 12 times 9.5? I would do that because there is 12 in. in a foot.

    asked by Julia
  164. Math

    What is a reasonable estimate of the perimeter of the base that is a square with all 4 sides 143.5 meters,

    asked by Hannah
  165. Physics

    Use the relationship power = current voltage to find out how much current is drawn by a 1350 watt hair dryer when it operates on 120 volts. Then use Ohm's law to find the resistance of the hair dryer.

    asked by John
  166. french

    ok my assignment is find a french music video and put speach bubbles in the video and also explain the meaning of the video. ok my music video is "Juste Une Photo de Toi" and i got the speech bubbles working but i don't know what the video mean. here what

    asked by neeedhelpp
  167. math

    what fraction of a week is 7 seconds A) 1/24 B)1/1440 C) 1/3600 D) 1/86400

    asked by hunter
  168. Science

    Ok, so I'm doing a project on the Earth's layers, and I just have a question on the model. DOES IT HAVE TO BE 3-D? If it is, I'm dead meat.

    asked by Catherine
  169. abnormal psychology

    Which one of the following is an essential feature of the impulse-control disorders? A)Ability to control the impulse B)Pride after committing the impulsive act C)Sense of calm prior to committing the act D)Pleasure after acting on the impulse Is D correct

    asked by vedrana
  170. Advertising-HELP

    I need an advertisement which hasn't been banned yet, but that you think should be banned. I don't really pay attention to ads, so I don't know which ones should be banned. I actually have to write a complaint letter on one.

    asked by Celina
  171. French

    If you're writing a sentence in French with two verbs, the first being l'imparfait, would the second one be in the infinitive? For example "Le peuple prehistoriques était intelligente parce que ils pouvaient ériger les monuments sans des machines" ? Is

    asked by Gabrielle
  172. English

    I urgently need you to check these sentences. Thank you. 1) Describe what living and working conditions for slaves in 19-th century (after 1810) America were like. Refer then to when slave trade was banned from US. 2) The vast majority of African Americans

    asked by Mike
  173. Life orientation

    Identify 5 practices in contravention of the basic conditions of employment act?

    asked by Robert
  174. english

    do you have a section on writing a research paper in mla format

    asked by henry
  175. Physics

    How long will it take a 1080 W motor to lift a 330kg piano to a sixth-story window 16.0m above?

    asked by John
  176. Math

    If the sides of a triangle are x, x+5, 2x+5. For what values of "x" would the triangle have a perimeter of at least 72?

    asked by Janelle
  177. US History

    Glorification of war in theory would be that it can change society, and make people better. but what would it be in Practice:??

    asked by Holly J.
  178. Physics

    How long will it take a 1080 W motor to lift a 330kg piano to a sixth-story window 16.0m above?

    asked by John
  179. English

    I included only 4 sentences for you to check. Thank you. 1) Refer then to the episodes which lead to the abolition of slavery. 2) He provides us with several epigrams –short and clever amusing sentences – which express his idea in a clever and amusing

    asked by Mike
  180. physics

    A snowboarder of mass 74.4 kg (including gear and clothing), starting with a speed of 5.0 m/s, slides down a slope at an angle è = 37.1° with the horizontal. The coefficient of kinetic friction is 0.116. What is the net work done on the snowboarder in

    asked by Anonymous
  181. Physics

    How long will it take a 1080 W motor to lift a 330kg piano to a sixth-story window 16.0m above?

    asked by John
  182. chemistry

    for our lab, we are given the molarity of ClO-. We are then supposed to use beer's law to determine the molarity of the dye that was used to make the solution with. For the dye, use the first absorbance value, Ao, and calculate the initial concentration of

    asked by Anonymouse one
  183. Elementary Statistics

    WHAT ARE THE BOUNDARIES OF 77.5 OUNCES?

    asked by Tee
  184. history

    How and why did the American economy soar from 1950 to 1970?

    asked by carol
  185. physics

    1. A solid copper cylinder hangs at the bottom of a steel wire of negligible mass. The top end of the wire is fixed. When the wire is struck, it emits sound with a fundamental frequency of 300 Hz. The copper cylinder is then submerged in water so that half

    asked by vijay krishna
  186. math

    A 4-story house of cards requires 24 cards. How many cards are required to build a 98 story house of cards?

    asked by john
  187. trig

    Suppose that q is in standard position and the given point is on the terminal side of q. Give the exact value of the indicated trig function for q.

    asked by Anonymous
  188. math

    What is the area of a circle with d=22?

    asked by Teresa
  189. ELA

    Can you check if this essay has some corrections that need do be fixed: Imagine you're talking on your telephone or even sending an email to your friend and the government is listening to your conversation or what you’ve written to your friends. Does

    asked by Sumaiya
  190. math

    What is the area for each circle? 1. d = 22mm 2. d = 17m

    asked by Teresa
  191. Cuban culture

    I tried googling this and I can't find anything. What makes Batidos (Cuban milkshake) special in Cuba?

    asked by Lala
  192. math

    The mean radius of the Earth is 6.37 x 106 meters (m). Assuming the earth can be modeled as a perfect sphere a. In cubic meters (m3 ) what is the volume of the Earth? b. In meters (m) what is Earth’s circumference? c. If the mean density is 5.515g/cm3,

    asked by Rocio Aguilera
  193. calculus

    y = log7(x^2 - 6x - 2) this is base seven is the answer 2x-6/(x^2-6x-2)

    asked by jessica
  194. Geography check

    The Zambezi River runs through the easternmost part of this country...is it Zambia?

    asked by Alyonka
  195. physics

    A high diver leaves the end of a 5.0 m high diving board and strikes the water 1.4 s later, 2.8 m beyond the end of the board. Considering the diver as a particle, determine the following. (a) her initial velocity, v0 1 m/s 2° 3 (b) the maximum height

    asked by Anonymous
  196. Numerical Analysis

    Using the bisection method, Newton’s method, and the secant method, find the largest positive root correct to three decimal places of x3 − 5x + 3 = 0. (All roots are in [−3,+3].)

    asked by Roy
  197. Kinesiology

    Assume that a muscle is having a force of 300N is pulling at an angle of 75 degrees. What are the components of the force both the trigonometric method and graphic method.

    asked by Jon
  198. Biology

    Can Someone please trace a molecule of O2 in extreme detail from the air to the a muscle cell in the left calf?

    asked by Anonymus
  199. Math

    how many positive three-digit numbers are there that have no digits repeating?

    asked by Sid
  200. grammar

    What is the adverb in the sentence I finally finished the report

    asked by Anonymous
  201. math

    2/x+3 = o solve for x. Is this where I go: 2= 0 x+3=0?

    asked by Jam
  202. intermediate algebra

    Select the set of equations that represents the following situation: Mike invested $706 for one year. He invested part of it at 5% and the rest at 3%. At the end of the year he earned $28.00 in interest. How much did Mike invest at each rate of interest?

    asked by joel
  203. algebra

    addition method:3x-5y=-2 and 5y-2x=-2 how would I solve it since they are not together?

    asked by m
  204. algebra

    Write the equation in y=mx+b form. Find the equation of the line that passes through the points (8,-15) and (-2,5) I am unable to get this answer!

    asked by Jam
  205. SmartPhone Help

    Blackberry torch 9800: Present three alternative choices from three different carriers and three different manufacturers. All must have the requirements listed below. Phone Name/Carrier Blackberry Torch 9800(I have no idea what is meant by Carrier) These

    asked by Anonymous
  206. calculus

    Can someone tell me how to do this type of problem? A particle moves along the curve y=sqrt(1+x^3). As it reaches the point (2,3) the y coorindate is increasing at a rate os 4cm/s. How fast is the x coordinate of the point changing at that instant?

    asked by Susie
  207. Math

    A room is in the shape of a right triangle. The hypotenuse is 8 meters longer than the short leg and the long leg is 4 meters longer than the short leg. Find the length of each side. (ok, now how can it be done if I change each side to cm and km, then ft

    asked by Julie
  208. math

    shad is 3ft from a lamppost that is 12 ft high. shad is 5 1/2 ft tall. how long is shad's shadow?

    asked by kourtney
  209. Algebra 1

    Two lines L1 and L2, are perpendicular. The equation of L1 is 3x-y=2. L2 passes through (-5, -1)

    asked by Jocelyne
  210. Geometry

    A wheelchair ramp has a rise from the ground of 1 gilt. The ramp has a length of fourteen feet. To the nearest angle the ramp makes the sidewalk

    asked by Sam
  211. science

    what is an explanation for the relationship between currents and the brightness of a light bulb??

    asked by andy
  212. algebra

    Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -3x + 6y = -3 / -6x + 4y = -10

    asked by Jackster
  213. chemistry

    write a balanced equation between sodium and water. if 1.2g of sodium reacted with water, calcul;ate the volume of gas produced at s.t.p. how many molecules of the gas are produced at s.t.p.

    asked by danny boay
  214. calculus

    Are y=log(x+1) and y=10^x-1 symmetric about the line y = x ?

    asked by Lynn
  215. chemistry

    what is 2.5% vapor expressed in parts per million?

    asked by Anonymous
  216. science/chem

    Hund's rule states that each orbital in a sublevel will contain one electron before another electron will fill an orbital? Why?

    asked by missy
  217. phy

    It is a lab question. For a standard stove top element, theoretically determine how long it will take to cool down toroom temperature from the high setting. Compare to experimental values. We have to used conduction, radition and convection

    asked by ami
  218. Chemistry

    What mass of Cr(OH)3 would be produced if 500ml of 0.250M KOH were added to a solution of CrCl3. I need to understand how to set this up, not just get the answer. I have the balanced equation figured out.

    asked by Angela
  219. Geometry-7th grade

    The diagonals of a rhombus ABCD intersect at point E. If the sides of BC is equal to x + 9 and side DC is equal to 5x-2, find x. How would I set this up-Please give me some direction

    asked by BethAnne
  220. History

    If you could summarize the fighting in the Soviet Union between 1941 and 1944 into one sentence what would you say??

    asked by Abby
  221. Science-math

    Calculate the density of 25 Grams at a volume of 10 millimeters

    asked by Naz
  222. science/chem

    Why do the d and f block elements have only 2 valence electrons?

    asked by missy
  223. Science-math

    Calculate the density of 25 Grams at a volume of 10 millimeters

    asked by Naz
  224. math

    Does anyone know how can I apply the Pythagorean Theorem to real world situations.

    asked by Dave
  225. Physics

    A parallel-plate capacitor is constructed from two circular metal plates or radius R. The plates are separated by a distance of 1.2mm. 1. What radius must the plates have if the capacitance of this capacitor is 1.1 uF? 2. If the separation between the

    asked by Jon
  226. math

    What is the area of each circle? 1. d = 42 2. d = 17

    asked by Teresa
  227. Science-math

    Calculate the density of 25 Grams at a volume of 10 millimeters

    asked by Naz
  228. Physics

    If the angle of incidence is 30 degrees, what is the angle of reflection?

    asked by jack
  229. English

    Finsh the sentence. The teenager spoke with the URBANE refinement of a person who..

    asked by Taylor
  230. statistics

    57, 61, 57, 57, 58, 57, 61 What is the mean My answer 408/7=58.285=58.286 answer is 58.286

    asked by Debbie
  231. Geoscience

    can you help me write out a geological time scale of an area located within stone mountain Georgia? I need a description of the area, how the rock transformed and was dated, picture of a map that has the longitude and latitude of the area picked, the

    asked by Robin
  232. Computer class

    how do I design a program using a flowchart, the program needs to compute state and county sales tax? It is suppose to compute it once the user enters amount of purchase

    asked by Tanya
  233. com 150

    pick out 3 professions or well-known companies that would highly benefit from having a employee who is well -trained in the art of expository writing.

    asked by celena
  234. United States 1700s

    How did the colonists across colonial boundaries become more aware of and interconnected with each other during this period 1700-1776? kind of like which events of closeness lead to the declaration of independence?

    asked by mike
  235. English

    I really hope you can have a look at my sentences. I forgot to include these last ones. 1)Describe the details of Winston Smith's life as they appear in the opening (?) to George Orwell's 1984? 2) Why can Orwell's 1984 be considered as an anti-utopian

    asked by Mike
  236. math

    Francisco has $2000. He invested part at 7% and the rest at 12%. If his annual return was $215, how much did he invest at each rate?

    asked by Jessica
  237. Advertising

    Is there any advertisment which you think should be banned?

    asked by Celina
  238. algebra

    Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -5x – 7y = 25.5 -2x + 10y = -9

    asked by Jackster
  239. Physics

    The two blocks in the figure are connected by a massless rope that passes over a pulley. The pulley is 17 in diameter and has a mass of 1.9 . As the pulley turns, friction at the axle exerts a torque of magnitude 0.40 . If the blocks are released from

    asked by Saif sidd
  240. Planning Your Carrer

    Why is it helpful to use "occupational clusters" in thinking about a career?

    asked by DestinyLashea
  241. physics

    1) a loaded cart with a mass of 96 kg sits at reat atop a 40 degree inclined plane that measures 20.5m long. accidentally the cart starts so to roll down the inclined plane with a frictional force of 5550N working against it for the intire 20.5m.

    asked by shelly
  242. physics

    A communications satellite is in a synchronous orbit that is 3.00 107 m directly above the equator. The satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by a distance of 3.10 106 m.

    asked by Anonymous
  243. English - Native speakers

    I got a little confuse by possessive s The rule goes that all regular plurals get the ending s' f.e. my parents' house So then it is my brother's house in singular and my brothers' house in plural?

    asked by tee
  244. physics

    Planet A and planet B are in circular orbits around a distant star. Planet A is 8.0 times farther from the star than is planet B .What is the ratio of their speeds ?

    asked by cool
  245. abnormal psychology

    Rani is a member of a tribe of Indians in the rain forest of south america.The tribe's witch doctor believes that Rani is possessed by the spirit of a demon wolf and in order to be cured he must undergo an exorcism.Which type of explanation of

    asked by vedrana
  246. math

    A cylinder has a diameter of 80 cm and a length of 45 cm. Another cylinder has the same volume but is 80cm long. What is the diameter of the longer cylinder?

    asked by priya
  247. FRENCH

    COuld you please tell me if Ive translated these French words and phrases right? Est-ce qu(e) - Phrase introducing a question Ne Quitte pas - Wait a minute? Maintenant - Now Il y a des defiles et beaucoup de bals: -There are some parades and many dances Ce

    asked by Joanna
  248. spanish

    congigating esta

    asked by Anonymous
  249. Physics

    I'm trying to help my 7th grader with homework and I don't know this stuff. How do you figure word problems based on newton's 2nd law. one problem is: What is the acceleration of a ball if a force of 20N is applied to the 8kg ball?

    asked by Denise
  250. physics

    When your car is moving at 3.33 m/s and car has a mass of 860 kg, how much translational kinetic energy does it have?

    asked by olga
  251. physics

    Some special vehicles have spinning disks (flywheels) to store energy while they roll downhill. They use that stored energy to lift themselves uphill later on. Their flywheels have relatively small rotational masses but spin at enormous angular speeds. How

    asked by olga