Questions Asked on
April 14, 2013

  1. chemistry

    A voltaic cell that uses the reaction Tl3+(aq) + 2 Cr2+(s) ¨ Tl+(aq) + 2 Cr3+(aq) has a measured standard cell potential of +1.19 V. determine E‹red for the reduction of Tl3+(aq) to Tl+(aq).

    asked by sarah
  2. chemistry

    Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing indium and cadmium: This is what I have so far: anode: In(s) --> In^3+ + 3e- cathode: Cd^2+ + 2e- --> Cd (s) Need help writing the

    asked by Lexi
  3. Physics

    A transistor radio operates by means of a 9.0 V battery that supplies it with a 40 mA current. (a) If the cost of the battery is $0.50 and it lasts for 300 h, what is the cost per kWh to operate the radio in this manner? (b) The same radio, by means of a

    asked by Billy
  4. sciology college course

    1. A dad holds five coins in his hand. He tells his son that if he can guess the amount of money he is holding within 5% percentage error he can have the money. The son guesses that he is holding 81 cents. The dad opens his hand and displays 90 cents. Did

    asked by sucker 1
  5. accounting

    The cash payments journal used in this problem has only three special amount columns. Under what circumstances would you recommend that additional special amount columns be added to a cash payments journal?

    asked by Jady
  6. Applied Calculus

    The world population at the beginning of 1990 was 5.3 billion. Assume that the population continues to grow at the rate of approximately 2%/year and find the function Q(t) that expresses the world population (in billions) as a function of time t (in

    asked by Jacob
  7. english

    each of the following sentences as periodic, cumulative, or inverted, and punctuate each correctly. Identify 1. Nowwhen I had-mastered the language of this water and had come to know every trifling feature that bordered the great river as familiarly I knew

    asked by Anonymous
  8. Physics

    A solenoid is 3.2 m long and has 500 turns per meter. What is the cross-sectional area of this solenoid if it stores 0.32 J of energy when it carries a current of 12 A? So I used L = 2*E / I^2; and then I used A = L*l / (uo * N^2) but my answer isn't

    asked by Valerie
  9. Calculus

    A balloon leaves the ground 500 feet away from an observer and rises vertically at the rate of 140 feet per minute. At what rate is the angle of inclination of the observer's line of sight increasing at the instant when the balloon is exactly 500 feet

    asked by Gabby
  10. pre calc

    Find all solutions of the equation 3sin^2 x -7sin x +2 = 0 in the interval [0,2pi). The answer is x_1= ?? and x_2= ?? with x_1

    asked by james
  11. PSYCHOLOGY

    Sara, a life-long ballet student, reports she feels like she does not want to participate in ballet anymore. She also states she is tired and cannot seem to get enough sleep. Bipolar disorder Generalized anxiety disorder Obsessive-Compulsive disorder Major

    asked by CURIOUS GIRL
  12. Math

    From a survey of 100 college students, a marketing research company found that 60 students owned iPods, 50 owned cars, and 20 owned both cars and iPods. (a) How many students owned either a car or an iPod (but not both)? 1 students (b) How many students do

    asked by Denise
  13. physics

    The L-shaped object in the figure below consists of three masses (m1 = 8.90 kg, m2 = 1.16 kg and m3 = 2.40 kg) connected by light rods of length L1 = 1.29 m and L2 = 1.86 m.What torque must be applied to this object to give it an angular acceleration of

    asked by Anonymous
  14. PHYSICS

    A 40 kg child stand on one end of a 70 kg canoe hat is 4 m in length. The boat is initially 3 m from a dock. The child notcies a turtle on a arock near the far en of the canoe so she proceeds to walk to the far ed off the canoe o get the turtle. a)

    asked by y
  15. sciology college course

    A science teacher tells her class that their final project requires the student to measure a specific variable and determine the velocity of a car with no more 2.5% error. Jennifer and johnny work hard and decide the velocity of the car is 34.87 m/s. The

    asked by sucker 1
  16. Physics

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

    asked by Emily
  17. Physics

    A device consists of eight balls each of mass 0.4 kg attached to the ends of low-mass spokes of length 1.8 m, so the radius of rotation of the balls is 0.9 m. The device is mounted in the vertical plane. The axle is held up by supports that are not shown,

    asked by Emily
  18. Chemistry

    Calculate the pH of a buffer solution that contains 0.60 M NaH2PO4, and 0.26 M Na2HPO4.

    asked by Maddie
  19. Physics

    A circuit contains six 270 lamps and a 18.0 heater connected in parallel. The voltage across the circuit is 120 V. (a) What is the current in the circuit when four lamps are turned on? (b) What is the current in the circuit when all lamps are on? (c) What

    asked by Billy
  20. physics

    An elevator has a mass of 500 kg. It may safely carry an additional mass of 1000kg and accelerate upward at 2m/s2. What is the tension in the cable?

    asked by becky
  21. math

    A baseball player swings and hits a pop fly straight up in the air to the catcher. The height of the baseball in meters t seconds after it is hit is given by a quadratic function h(t) = −4.9t^2 + 9.8t + 1. What is the maximum height of the baseball?

    asked by Anonymous
  22. statistics

    Find the standard deviation, Sigma, for the binomial distribution which has the stated values of n and p. Round your answer to the nearest hundredth. n = 639; p = 0.7

    asked by todd
  23. Chemistry

    In which case is heat involved: mixing 100.0-g samples of 90'C water and 80'C water or mixing 100.0-g samples of 60'C water? assume no heat is lost to the environment. please help thanks.

    asked by Perrie E.
  24. physics

    Car A negotiates a curve of 60 m radius at a constant speed of 50 km/h. When A passes the position shown, car B is 30 m from the intersection and is accelerating south toward the intersection at the rate of 1.5 m/s2. Determine the acceleration which A

    asked by nelly
  25. algebra

    nico is saving his money for college he invests some money at 8% and $1300 less than that amount of 5% the investments produced the amount of $195 interest in 1 year how much did he invest at each rate?

    asked by rebecka
  26. Math

    Let R1 and R2 be the remainders when polynomials x^3 + 2x^2 - 5ax - 7 and x^ 3 + ax^2 - 12 x + 6 are divided by ( x + 1 ) and ( x - 2 ) respectively. If 2R1 + R2 = 6, find a. Please work the complete solution.

    asked by Steve
  27. spanish

    que comen las personas en un banquete de quinceanera en peru

    asked by Anonymous
  28. Alg 1

    Completing the square: Which of the following is a solution x^2 + 14x + 112 = 0? If necessary round to the nearest hundredth. x= -0.24 x= -4.24 x= 4.24 no solution I worked it and got neither of the answers. I got x= 0.9 and x=-14.9. Where did I go wrong?

    asked by Jane
  29. U.S/history AP

    A)-Outspken proponent of women's rights and helped the below women organize the seneca falls convention. B)a prominent advocate of women's rights.She organized the seneca falls convention with the person above.Her husband wholeartedly supported her views

    asked by joy
  30. math

    Find all solutions of the equation 3sin^2 x -7sin x +2 = 0 in the interval [0,2\pi). The answer is x_1= ? and x_2= ? with x_1

    asked by tyler
  31. math

    Triangle ADE is inside rectangle ABCD. Point E is half way between points B and C on the rectangle. Since AB is 8 cm and side AD is 7 cm. 1. what is the area of triangle ADE? 2. what is the ratio of the area of the triangle ABE to the area of triangle ADE?

    asked by natalie
  32. finance

    This morning, you purchased a stock that will pay an annual dividend of $1.90 per share next year. You require a 12 percent rate of return and the annual dividend increases at 3.5 percent annually. What will your capital gain be on this stock if you sell

    asked by Xuenan Lin
  33. chemistry

    The escape velocity from earth is 2.5 x10^4 miles per hour. What is this speed in m/s? (1 mile 1609 m)

    asked by Nancy
  34. Biology

    PLEASE HELP!!!! 1. How many millions of years ago did sharks first appear? (Make sure you are looking for animals that only have cartilage skeletons). 2. How many millions of years ago did bony fish (like the perch) first appear? 3. How many millions of

    asked by Kim
  35. algebra

    the elspaso middle school girls basketball team is going from el paso to san antonio for the texa state championship. The trip will be 560 miles. Their bus travels at an average speed 60 miles per hour.

    asked by malik
  36. chem

    If it takes 84.2 min for the concentration of a reactant to drop to 20.0% of its initial value in a first-order reaction, what is the rate constant for the reaction in the units min-1?

    asked by ted
  37. personal finance

    Jo owns 150 shares of Delta General stock. She purchased the stock for $24 a share. She sold the stock for $30 per share. The commissions required to buy and sell her stock cost her $120. Assuming that she received no dividends (income) during the time she

    asked by morgan
  38. Physics

    A satellite circling the earth completes each orbit in 5.10 x 10^3 s. What is the gravitational field strength @ the location of the satellite's orbit?

    asked by Dal
  39. chemistry

    how would you solve the mass of sucrose, C12H22O11, that is needed to make 550ml of a 0.25M solution?

    asked by maggie
  40. physics

    A solid block of mass m2 = 8.3 kg, at rest on a horizontal frictionless surface, is connected to a relaxed spring. The other end of the spring is fixed, and the spring constant is k = 210 N/m. Another solid block of mass m1 = 12.4 kg and speed v1 = 4.9 m/s

    asked by Nicole
  41. Physics

    11-098-satellite_and_junk.jpg A spherical satellite of radius 4.6 m and mass M = 195 kg is originally moving with velocity vsatellite,i = < 3000, 0, 0 > m/s, and is originally rotating with an angular speed ?1 = 2 radians/second, in the direction shown in

    asked by Emily
  42. precalculus

    A model airplane 50 feet above the ground is flying away from an observer. Find the angle of elevation theta of the plane as a function of the distance from the observer to the plane. What is theta when the plane is 300 feet from the observer?

    asked by anonymous
  43. Chemistry #2

    If 100.0 g of water at 90'C is added to 50.0 g of water at 10'C, estimate the final temperature of the water. explain your reasoning. please my last question i really don't get it, :/

    asked by Perrie E.
  44. Physics

    A satellite circling the earth completes each orbit in 5.10 x 10^3 s. What is the gravitational field strength @ the location of the satellite's orbit?

    asked by Dal
  45. pre calculus

    Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))-1 = (f(x))^2 f(x)= ??

    asked by james
  46. Life-orientation

    Ten(10) ways in which water pollution can impact negatively on one's health.

    asked by Koketso
  47. math

    a scale model of a building is 8in.by12in.the scale is 1in.by 15ft.what are the dimensions of the actual building

    asked by Anonymous
  48. Math

    The mean time to complete a certain stat quiz is 25 minutes, with a standard deviation of 5 minutes. Find the probability of a student taking. 1.) less than 15 minutes. 2.) Between 15 and 25 minutes. 3.)more than 25 minutes.

    asked by John
  49. Chemistry

    radioactive sodium chloride is appropriate for diagnosing circulatory problems, but radioactive xenon is helpful in searching for lung problems. Explain why. I understand different elements are used for specific parts of the body but I don't understand

    asked by Sara
  50. pre ap physics

    A) A small cork with an excess charge of +9.0x10^-6 is placed 0.13 m from another cork, which carries a charge of −3.2x10^-6. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10^9 N • m^2/C^2. Answer in

    asked by keely
  51. Science need help ?????///

    An astronomer observes two galaxies, A and B, which have redshifts of: Galaxy A = 0.020 and Galaxy B = 0.010. Which galaxy is closest to us and what is its distance away from us? You may assume that the Hubble constant is H0 = 75 km s–1 Mpc−1 and that

    asked by sam
  52. Histroy

    Once they arrived in the United States, immigrants experienced a life very different from what they imagined. Which was not something that was most immediately part of their experience? (Points : 1) Labor scams Low skilled work Religious tolerance

    asked by John
  53. statistics

    An economist wants to estimate the mean income for the first year of work for college graduates who majored in biology. How many such incomes must be found if the economist wants to be 95% confident that the sample mean is within $500 of the true

    asked by Panther
  54. English

    1. Jenny's family are/is following her. She is taking a walk with her family. 2. Yujin is watering plants with a watering can. Her brother is digging with a trowel. Her father is also watering plants with a watering pot. What is Yujin doing? She is

    asked by rfvv
  55. Maths

    Solve for the value of x: 6log(x^2+1)-x=0

    asked by Seth
  56. U.S/history AP

    he War of 1812- also called the second war of American Independence or by its opponents the derisive (----) . U.S.declared war on Britain because they did not recognize our neutrality and interfered with our freedom of the(-----)shipping My answers are:

    asked by joy
  57. Chemistry

    If the Kb of a weak base is 1.5 × 10^-6, what is the pH of a 0.25 M solution of this base? I found that I need to use the quadratic equation but I'm having difficulties because I come up with taking the square root by zero and that isn't right. Please

    asked by Leah
  58. Life orientation

    What are the 5 factors contributing to the lack of physical fitness and proper nutrition in the adolescents

    asked by Zandile
  59. precalc

    1. A plane is headed at 122 degrees with an air speed of 350mph in a wind that is blowing from 38 degrees. Find the ground speed of the plane and the speed of the wind if the actual flight was at 133 degrees. 2. A plane is heading at 20 degrees at 300mph

    asked by sarah
  60. Physics

    Consider the RL circuit shown in the figure, where R = 5.0 Ω and L = 4.6 H. How much energy is stored in the inductor after the switch has been closed a long time? I would know how to do this if they actually gave me a value for time, but I'm lost now.

    asked by Valerie
  61. Chemistry

    * Fixed Question What is the PH of a buffer made by adding 8.20 grams of sodium acetate(NaCH3CO2) to 500 ml of 0.10 M(molarity) acetic acid(CH3CO2H). Ka for acetic acid is 1.8 x 10^-5.

    asked by Lele
  62. Principal of Math

    a tree casts a shadow 29m long. at the same time the shadow cast b a 61cm tall statue is 82cm long. find the height of the tree. round results to the nearest unit.

    asked by Christine
  63. maths

    a dam holds 13.5 megalitres of wate when full. If water flows from the dam at the rate of 5 litres per second, approximately how long will it take to empty the dam.

    asked by senorita
  64. math

    Marty walks to school 4 days each week. The walk talks 15 minutes. How much time does it take marty to walk to school & home each week. Is this correct? 15×4=60 it takes him an hour each week

    asked by Joe
  65. math

    Given: f(closure(A)) subset of closure(f(A)) Prove: For any closed set A in Y, f^-1(A) is closed in X (AKA f is continuous) X and Y are metric spaces f: X -> Y f^-1 is f inverse. closure(A) = A U limit points of A The first line is Let C be a closed subset

    asked by gemma
  66. calculus

    8). Part 1 of 2: In the solid the base is a circle x^2+y^2=16 and the cross-section perpendicular to the y-axis is a square. Set up a definite integral expressing the volume of the solid. Answer choices: integral from -4 to 4 of 4(16-y^2)dy, integral from

    asked by Sally
  67. Alg 1

    The rectangular has an area of 5400 cm^2. What is the value of w? 5400 = (w)(2w - 30) 5400 = 2w^2 - 30 w 5400 = 2w(w - 15) Now I am stuck. My choices are: -45 cm 45 cm 60 cm 90 cm What do I need to do next to get the correct answer? Thanks.

    asked by Jane
  68. pre calc

    Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A= ??.

    asked by tyler
  69. math

    Suppose you had a slice of pizza that was cut from a 16” pizza. You measure the angle that it was cut at to be 0.6 radians. EXPLAIN how you could find the length of the crust on the slice of pizza. *

    asked by Lynn
  70. Chemistry

    What is the PH of a buffer made by adding 8.20 grams of sodium acetate(NaCH3CO2) to 500 ml of 0.10 M acetic acid(CH3CO2H). Ka for acetic acid is 1.8 x 10^-5.

    asked by Lele
  71. science

    you run 100m in 25's. if you later run the same distance in less time , does your average speed increase or decrease? explain.

    asked by karen
  72. precalculus

    For each of the following determine whether or not it is an identity and prove your result. a. cos(x)sec(x)-sin^2(x)=cos^2(x) b. tan(x+(pi/4))= (tan(x)+1)/(1-tan(x)) c. (cos(x+y))/(cos(x-y))= (1-tan(x)tan(y))/(1+tan(x)tan(y)) d.

    asked by anonymous
  73. anthropology

    Chiefdoms are characterized by all of the following except

    asked by ashley
  74. Physics

    A 100 W lamp is connected to 120 V, and its current is measured. A resistor is added to the lamp to reduce the current to half its original value. (a) What is the potential difference across the lamp? (b) How much resistance was added to the circuit? (c)

    asked by Billy
  75. Biology

    Reptiles and mammals both have a four chambered heart yet reptiles utilize the sun to monitor body temperature while mammals control body temperature internally. What does this mean about the separation of oxygenated (blood that already picked up oxygen

    asked by Kim
  76. BIO

    3. Fish have a two chambered heart called a single loop. discuss the benefits and drawbacks of this system. 4. Amphibians have a three chambered heart. Discuss the importance of the extra chamber in terms of the obvious physical differences that amphibians

    asked by SOMEONE HELP THIS PERSON
  77. Math

    Null factor law and factoriising: 2x^2+7x=0 X(2x+7)=0 X=0 or 2x+7=0. ( the answer in the book was x=-7/2, how? And. X^2-4=2x-4 Is it x^2-4-2x+4=o ??? If so!' how do I continue?

    asked by Sally
  78. science

    Why is it difficult to distinguish between some pure substances and solutions? What methods can overcome this to define if either it is a pure substance or solution?

    asked by Sunny
  79. accounting

    Rushia Company has an available-for-sale investment in the 10%, 10-year bonds of Pear Co. The investment’s carrying value is $3,200,000 at December 31, 2010. On January 9, 2011, Rushia learns that Pear Co. has lost its primary manufacturing facility in

    asked by Andrew
  80. Physics

    On an air track, a 403.0 glider moving to the right at 1.70 collides elastically with a 500.5 glider moving in the opposite direction at 3.00 . 1. Find the velocity of first glider after the collision. 2. Find the velocity of second glider after the

    asked by Wesley
  81. Physics

    Define resistivity and state its units

    asked by Tobi
  82. arithmetic

    play 160 games and won 60% how many games did the team win

    asked by Hipolito
  83. Maths

    The perimeter of a rectangular wall is 56m, there are 4 circular windows with a circumference of 7,54m each, the wall has 2 standard doors. What is the length and the width of the wall?

    asked by Lubeth
  84. Chemistry

    What is the hydronium ion concentration in a solution 0.150M in HNO2 and 0.300M in NaNO2? Ka = 7.24E-4

    asked by Alexis
  85. social studies

    did germany take over sweden in WW2

    asked by noah
  86. math

    A fair coin is tossed 10 times. What is the probability of getting exactly 6 heads?

    asked by Moyer
  87. Chemistry

    I'm having a little trouble determining oxidation numbers for elements in a redox reaction KMnO4+HCl--> MnCl2+Cl2+H2O+KCl So far what I have for the reactants side is: K= +1 Mn= +7 O4= -2 H= +1 Cl= -1 And for the products side I have: Mn= +2 Cl2= -1

    asked by K
  88. Math

    What is 8/9 as a percent, as a decimal, and a decimal rounded to two places?

    asked by Emily
  89. Math

    If alpha and beta are the zeros of the polynomial ax^2 + bx + c then evaluateA. (alpha)^2 / beta + (beta)^2 / alpha B. alpha^2 .beta + alpha.beta^2 C. 1/(alpha)^4 + 1/(beta)^4. Please work the complete solution.

    asked by Steve
  90. Biology

    Fish have a two chambered heart called a single loop. Discuss the benefits and drawbacks of this system.

    asked by Kim
  91. math

    Write an expression for the coefficient of x^997 in (x+1)^1008. Find its value.

    asked by Moyer
  92. chemisty

    how many grams of sucrose must be dissolved in 1.5kg of water ot produce a solution which has a freezing point of -2.40 degrees C?

    asked by Joan
  93. Math

    A dipole of 1 Debye is equal to 3.33 x 10^-30 C m . Show that in atomic units 1 D = 0.39345 au.

    asked by Adam
  94. science help plzzzzzzzzzzzzzzz?

    What is the mean photon energy of.......? During the history of the Universe from the Big Bang to the present day, at some point in time the mean temperature of the Universe was 1 × 10^17 K. What was the mean photon energy at this instant, and which of

    asked by centya
  95. kaplan

    Quixote Consulting dustin larkin ratio sheet

    asked by Anonymous
  96. algebra

    what is the value of the expression 2xsquare+3xy-4ysquare when x=2 and y =4?

    asked by Hipolito
  97. science

    how does convection in the atmosphere create surface ocean currents?

    asked by kandybear6464
  98. Algebra

    Find the equation with the given properties. Express the equation in slope intercept form. Containing points p=(-4,-2) and Q=(-2,1) What is the equation of the line? y=

    asked by Jenn
  99. Math

    A tower stands on a 20 degree slope. From a point 45 m directly up the slope. The angle of elevation of the top of the tower is 10 degrees. How tall is the tower?

    asked by Chelsea
  100. Chemistry

    What volume of 0.105 M(molarity)is needed to completely neutralize 25.0 ml of 0.180 M(molarity)HBr according to the equation: KOH(aq)+ HBr(aq)-> KBr(Aq)+ H2O(L)

    asked by Lele
  101. Physics

    Consider the following circuit. We have R_1=7 Ohms, R_2=17 Ohms, R_3=11 Ohms, V=9 Volts, L=0.09 H. At t=0 the switch is closed. (a)Immediately after the switch is closed, what are currents I_1, I_2, I_3 ? I_1 (b)What are the three currents after the switch

    asked by Phy
  102. english

    ana wants to write a descriptive essay about a place tha is important to her 1-which of these would best help ana prepare to write aboute her plkace a-reading stories about places she has not visited b-closing her eyes, picturing her place and listing

    asked by jake plzzz
  103. Physics

    A coil consists of N=10^5 turns of wire wrapped uniformly around a plastic torus. The inside radius of the torus is r0=0.15 m and the outer radius is r1=0.16 m. Thus, each winding has a diameter d=0.01 m. What is the self-inductance (in H) of this coil?

    asked by Phy
  104. Math

    Find the distance between the points with polar coordinates (3, 120°) and (0.5, 49°)? Is the answer 2.88?

    asked by Athena
  105. Calculus

    The present value of a building in the downtown area is given by the function p(t) = 300,000e^-0.09t+(t)/2 f or 0 _< t _< 10 Find the optimal present value of the building. (Hint: Use a graphing utility to graph the function, P(t), and find the value of t0

    asked by Deeno
  106. Psychology

    I'm doing the classic experiment on "reaction time: male vs. female. " The test involve dropping a ruler and see where the subject catches it. The problem is that If i was the one to drop the ruler, depend on the subject being male or female, it would

    asked by Mina
  107. chemisrty

    how many ml of a .1M HCl are required to react completely with 1 gm mixture of Na2CO3 ?

    asked by swati
  108. Trigonometry

    wheels on a skateboard are 3.63 inches. If the skateboarder is travelling down a hill at 23 miles per hour what is the angular velocity.

    asked by Adrian
  109. Scoence

    Explain why would a bottle that is left overnight with water is crack but a empty bottle would not.

    asked by Jess
  110. Science

    Explain why would a bottle that is left overnight with water is crack but a empty bottle would not.

    asked by Jess
  111. calculus

    10). Find the area of the region bounded by the graph of f(x)=4lnx/x, y=0, x=5.8 11). Find the area of the region bounded by x=y^2-1y, x=0

    asked by Sally
  112. Teaching techniques

    Which learning technique is frequently used in the expository model of teaching?

    asked by Cam
  113. Science

    If rocket had been 10 m above the ground when its horizontal distance from the launchpad was 2m ,wheredo you think rocket would have landed?

    asked by Akhilesh
  114. geometry

    in the diagram below of quadrilateral abcd ac is a diagonal that biscets

    asked by lexi
  115. math

    In right triangle ABC, a = 52 ft and c = 63 ft. Which of the following trig ratios of angle B, would combine the given sides?

    asked by msmith
  116. physics

    An 8.0 Ω resistor and a 4.0 Ω resistor are connected in series with a battery. The potential difference across the 4.0 Ω resistor is measured as 9 V. Find the potential difference across the battery.

    asked by Sara
  117. physics

    A 46.7-g golf ball is driven from the tee with an initial speed of 55.5 m/s and rises to a height of 25.9 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 5.85 m below its

    asked by Anonymous
  118. physics

    A spring is extended 4mm by an applied force of 2.0N. a)What is its spring constant? b)How much would it extend if a load of 150g was suspended from it?

    asked by Tangeni.
  119. physics

    A spring is extended 4mm by an applied force of 2.0N. a)What is its spring constant? b)How much would it extend if a load of 150g was suspended from it?

    asked by Tangeni.
  120. Math

    The minute hand is 12 feet long, but the clock face is 22 feet in diameter. If the minute hand were twice as long, how much farther would it travel every hour?

    asked by Gingercorb
  121. English

    I have to write an Prospectus and Annotated Bibliography essay. But I don't know how to do that, can anyone explain what to do for me?

    asked by Colby
  122. pre calculus

    Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x cos x) = 1/(f(x) f(x)= ???

    asked by james
  123. Find the equation....

    Find the equation with the given properties. Express the equation in slope intercept form. Containing points p=(-4,-2) and Q=(-2,1) What is the equation of the line? y=

    asked by Lauren
  124. HSS

    How the Swahili language came being

    asked by sethabile
  125. L.O

    Ten ways in which floods can impact negatively on one's health?

    asked by Anonymous
  126. math

    marcus scored 23 points in his basketball game on friday and 19 points in his basketball game on saturday.how many points did marcus score in two games

    asked by akiya
  127. English

    1.If she were or was Please explain the rules. 2. When do you use can not and cannot or everyone and every one? Rules?

    asked by Anonymous
  128. Java programming

    – One Dimensional Array Consider this example problem: You are given 7 quiz scores of a student. You are to compute the final quiz score, which is the sum of all scores after subtracting the lowest one. For example, if the scores are 8 7 8.5 9.5 7 5

    asked by noh
  129. pre calculus please help

    Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

    asked by james
  130. Algebra

    Find the distance d(P1,P2) between the points P1 and P2 P1=(-1,5);P2=(2,4) d(P1,P2)=

    asked by Lauren
  131. math

    Will someone please help me solve this problem. Simplify by factoring. ã250 this is a radical sign in front of 250.

    asked by Michael
  132. english

    ms sue can u plzzz check my 1nd answer

    asked by jake plzzz
  133. Java programming

    can anybody help me.. Multidimensional Array Use a two-dimensional array (for example of 3 by 3) to simulate the addition operation of two matrices. Sample output: the first matrix: 1 2 3 1 0 1 1 2 1 the second matrix: 1 1 1 2 2 2 3 3 3 The total of two

    asked by noh
  134. englsih

    Usually, the koi pond is quiet, a lovely place for daydreaming or planning. 22-Nature gives us many gifts, but this one is nice. As i breathe in the sweet air and absorb the appearance of the area, I relax.My senses are keen and filled with a variety of

    asked by jake plzzz
  135. life orientation

    what can thembi do to deal with the unethical behavior

    asked by feli
  136. JAVA PRoblem

    In an Array, how to limit the values that are inputted by the users from the keyboard??

    asked by phyton
  137. college math

    4. Do the indicated operations. A) 3 B) –13 C) 5 D) –11

    asked by rolitha
  138. physics

    A thin steel hoop of weight W and radius r starts from rest at A and rolls down along a circular cylindrical surface of radius a as shown in Fig. G. Determine the angle defining the position of point B where the hoop will begin to slip if the coefficient

    asked by praveen
  139. principals of math

    a triangle drawn on a map has sides of lenghts 7.0 cm, 11 cm, and 15 cm. the shortest of the corresponding real-life distances is 123km. find the longest of the real-life distatnces. round to the nearest unit.

    asked by Christine
  140. sine and cosine

    Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x)(cos x) = (1/f(x)) f(x)= ?

    asked by tyler
  141. college english

    my professor want's us to write an abstract proposal on our reserch topic " Is our food safe to eat?" BUT we did not write our papers yet,so can someone help me how to set it up

    asked by aleksandra
  142. Calculus

    Find the derivative of y = (e^x-e^-x)/2

    asked by Nuru
  143. math

    f(x,y)=square root x^2+y^2

    asked by dino
  144. economics

    Calculate the percentage return on the security if the payoff to the security in one year is $1,000, ... security in one year is $1,000, $1,500, $2,000, or $2,500.

    asked by cheryl
  145. math

    Bill sees that the shadow of a flag pole is about four times as long as his shadow. If Bill if about 5 1/2 feet tall, about how tall is the flag pole?

    asked by Anonymous
  146. Math

    If (Y x 15+20=245), what does Y equal?

    asked by Daniel
  147. math

    y/9=-5/3

    asked by Tina
  148. government

    The "long tail" is a phenomenon related to

    asked by Anonymous
  149. MATH

    Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

    asked by james
  150. arithmetic

    which of the following is the least

    asked by Hipolito
  151. Precalculus

    Solve the equation 2sin^2(theta)+3sin(theta)+1=0 for theta.

    asked by anonymous
  152. calculus

    5). Find the volume of the solid of revolution generated by rotating the graph of y=8 lnx about the y-axis between y=0 and y=16 Answer choices: 238.39pi, 246.39pi, 230.39pi, 214.39pi, 222.39pi 7). Find the area of the region bounded by y=√x-2, y=9, y=0,

    asked by Sally
  153. calculus

    3). The shaded region is bounded by the y-axis and the graphs of y=1+√x, y=2. Find the volume of the solid obtained by rotating this region around the x-axis. Answer choices: 7/6pi, 4/3pi, 11/6pi, 5/3pi, 13/6pi, 5/6pi 4). Find the area of the region

    asked by Sally
  154. algebra

    In the early months of some year, one site added 0.6 million new accounts every day. at this rate, how many days would be needed to add 30 million new accounts?

    asked by nancy
  155. English

    1. He is riding a roller board. 2. He is in the air on the roller board with his arms spread in the picture. 3. Talk with your partner and check the Yes box if your partner likies the activity. If your partner doesn't like the activity, check the no box.

    asked by rfvv
  156. math

    Can a right triangle have sides of length 1, 7, and 5 to the square root of 2? Justify your answer.

    asked by Anonymous
  157. english

    dialect is used to a-stablish setting and character b-describe the atmosphere c-support the main idea d-help readers visualizwe events mi 1st answer is d then a

    asked by Anonymous
  158. Math

    Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))-1 = (f(x))^2 f(x)= ??

    asked by dylan
  159. Math

    What is 5 to the square root of 2?

    asked by Anonymous
  160. math

    Let 2^a = 5 and 2^b = 7. Using exponent rules, solve the equation in terms of a and b. 0.4^x = 343

    asked by emily
  161. english

    if a free verse peom has alliteration does that mean it has rhyme

    asked by jake plzzz
  162. Social studies

    Trace the historical origin of social studies in Russia,USA and Brittin

    asked by Enoch
  163. english

    Her gaze was a laser to his heart this metaphor means that a-grandmother was trying to scare him b-grandmothers stare made him feel guilty c-grandmothers look gave him a heartburn d-grandmother stared directly at his chest 1-c or d

    asked by Anonymous
  164. Chemistry

    What volume of H2(g), stored at 26°C at a pressure of 141 atm, would be needed to run an electric motor drawing a current of 8.4 A for 4.8 h?

    asked by Joe
  165. Biology

    Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?

    asked by Kim
  166. Biology

    Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?

    asked by Kim
  167. english

    irony a-grandma doesnt believe her grandsons story b-schoo lpricipal sees a student break into a locker c-person who reclaims an item from a thief is accused of stealing d-person who loses something doesnt want it back 1-d then c

    asked by Anonymous
  168. Biology

    Amphibians have a three chambered heart. Discuss the importance of the extra chamber in terms of the obvious physical differences that amphibians like frogs have from fish.

    asked by Kim
  169. english

    cavernous means a-small b-huge c-elegant d-confined 1-b

    asked by Anonymous
  170. english

    Her gaze was a laser to his heart this metaphor means that a-grandmother was trying to scare him b-grandmothers stare made him feel guilty c-grandmothers look gave him a heartburn d-grandmother stared directly at his chest 1-b

    asked by Anonymous
  171. psychology

    Perceptions are linked to sensations. what happens when we get overloaded from our senses and how would that overload impact perceptions?

    asked by slomomo
  172. L O

    Recommendations on how to address HIV/AIDS

    asked by Vhugala
  173. math

    given the points A(0,0), B(3,1) and C (1,4) what is the measure of angle ABC I plotted it on a gragh and got 1.46 degress. I am unsure if I am doing this question correctly. Or am I misreading it thanks in advance .

    asked by Rose
  174. physics

    'a weather station monitors a storm using a radar system. the radio wave pulse emitted is received back at the transmitter after 0.34 ms. the wavelength emitted was 5.6 cm and that received after reflection from the storm was 1 billionth of a meter longer.

    asked by mmk
  175. since and cosine please help me!

    Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)(sec^2 x))-1 = (f(x))^2 f(x)= ???

    asked by tyler
  176. social studies

    NEED HELP ON THIS QUESTION Discuss the relation of democracy to globalization. What, in your view, does the future hold in this regard?

    asked by lilly
  177. chemistry

    how do I carry out qualitative analysis on (NH4)2SO4.FESO4.6H20

    asked by john manuel
  178. social studies

    NEED HELP ON THIS QUESTION Globalization can be understood in terms of shifts in a series of domains. Discuss in relation to i) culture and ii) the state. What in your view, does the future hold in this regard?

    asked by lilly
  179. pharmacy math

    which would be the most appropriate measuring device for the following prescription: Give 0.7ml of metoclopramide syrup every six hours answer 1 tsp oral syringe with 1 ml marking I am not sure answer Bob help

    asked by Fai
  180. math

    form the quadratic equations whose roots are(A:5 and -1/3

    asked by pressly.
  181. English

    Posted by rfvv on Sunday, April 14, 2013 at 3:50pm. 1. He is riding a roller board. 2. He is in the air on the roller board with his arms spread in the picture. 3. Talk with your partner and check the Yes box if your partner likies the activity. If your

    asked by rfvv
  182. Math 112 Help please

    How do I break these down to find out which one is the largest without using a calculator their fraction. a. 13,579 + 1/2468 b. 13,579 - 1/2468 c. 13,579 * 1/2468 d. 13,579/ 2468

    asked by Enis
  183. calculus

    Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4

    asked by Liz
  184. Life orientation

    Which institution or organisation involved in supporting or giving redress to substance abuse?

    asked by Vhugala
  185. Parametric Equations

    Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4

    asked by Elyse
  186. accounting

    Hillsborough Co. has an available-for-sale investment in the bonds of Schuyler with a carrying (and fair) value of $ 85,540. Hillsborough determined that due to poor economic prospects for Schuyler, the bonds have decreased in value to $ 59,710. It is

    asked by Andrew
  187. Math

    28a^11b^7/4a^3b

    asked by Gina
  188. MATH

    1 D = 10^-18 statC·cm = 10^-10 esu·Å = 1⁄299,792,458×10^−21 C·m ≈ 3.33564×10^−30 C·m ≈ 1.10048498×1023 ≈ 0.393430307 au A dipole of 1 Debye is equal to 3.33 x 10-30 C m . Show that in atomic units 1 D = 0.39345 au. The above is the

    asked by Taylor
  189. arithmetic

    which of the following is the leas0. 0.015 0.105 or 0.15

    asked by Hipolito
  190. Chemistry

    If the pressure is 10.0 atm, what is the temperature? If a 2.53-L container is filled with 169 g argon

    asked by Tonya
  191. maths

    Hannah has a balls.4/5 is a black balls while the remaining 35 is a red balls.how many more black balls does hannah have...thanks!

    asked by nimie
  192. Chemistry

    The question I am having trouble with is: Scientists originally were uncertain whether the oxygen gas produced during photosynthesis came from CO2, H2O, or from both. How could radioisotope tracers be used to settle that question?

    asked by Madison
  193. Alg 1

    A box shaped like a rectangular prism has a height of 17 in. and a volume of 2720 in^3. The length is 4 inches greater than twice the width. What is the width of the box? Please solve and explain what I need to do. The choices are: -10 8 20 40

    asked by Jane
  194. Math

    Graph y = ½ x^2 – x +3 for 0≤x≤6 Calculate the mid- ordinates for 5 strips between x = 1 and x 6, and hence use the mid-ordinate rule to approximate the area under the curve between x = 1, x = 6 and the x- axis. assuming that the area determined by

    asked by Anonymous
  195. English

    1.If she were or was Please explain the rules. 2. When do you use can not and cannot or everyone and every one? Rules?

    asked by Anonymous
  196. tax accounting

    purchased a bond on August 15, 2012 for $2,100. $200 of the purchase price represented accrued interest. She received $210 in interest income on the bond on December 1, 2012. What is the proper treatment of the $210 interest income for federal income tax

    asked by tim
  197. english plzzzzzzzzz helppppp

    1The people i love the best 2jump into work head first 3without dallying in the shadows 4and swim off with sure strokes aost out of sight 5They seem to become natives of that element 6the black sleek heads of seals bouncing like half-submerged balls 7 i

    asked by jake plzzz
  198. commerce

    identify and describe three environmental health hazards that cause illhealth,crises and disasters

    asked by nobuhle gwegwana
  199. philosphy

    I am to draft a six to eight page paper based upon a life changing decision that I or someone in my community had to make. I am considering writing about returning back to school but I am stuck on how to get started. Can someone please help.

    asked by angela
  200. precalculus

    Solve the equation cos(2x)cos(x)+sin(2x)+sin(x)=1 for all values of x.

    asked by marie darling
  201. physics

    A 22.0 Ω, 11.0 Ω, and 6.00 Ω resistor are connected in parallel to an emf source. A current of 6.00 A is in the 11.0 Ω resistor.What is the potential difference across the source? Answer in units of V

    asked by Sara
  202. math

    three of four numbers have a sum of 22. if the average of the four number is 8, what is the four number

    asked by Hipolito
  203. Quantum/inorganic chemistry

    c. Which of these electron configurations has the 4F term symbol for its ground state? p3 d3 d4 f2 f3

    asked by Adam
  204. Life orientation

    In 10-15 lines critically discuss 5 ways in which the human or enviromental problem impacts on the community

    asked by Shudufhadzo
  205. precalculus

    Find all solutions for the equation 3cos(x)=cot(x). When do I use +2kpi? Is it only when I'm suppose to "find all solutions"? I got sin(x)=1/3. Is that correct?

    asked by marie darling
  206. college math

    5u+2v=-15 3u+v=-8 Im not sure how to do this problem

    asked by carrie
  207. physics grade 12.

    A spring is extended by 4mm when a load of 2.N was applied. a)What is its spring constant? b)How much would it extend if a losd of 150g was suspended from it?

    asked by Tangeni.
  208. english

    free verse poem a-has simple rhyme pattern b-is written in dignified launguage c-is usually a long narrative peom d-doesnt have a regular rhyme scheme 1-d

    asked by jake plzzz
  209. arithmatic

    forty six . two multiply by ten minus square

    asked by Hipolito
  210. arithmatic

    forty six point two multiply by ten minus square

    asked by Hipolito
  211. Math

    cos22.5=1/2 sqrt(A + sqrt B)

    asked by Raquel
  212. french

    caroline apprend a nager elle prend des lecons de

    asked by eric
  213. english

    should religious phares be taken out of money for a reasearch paper

    asked by amber
  214. maths

    whats a number to the power

    asked by Anonymous
  215. statstics

    construct a 90 confidence interval for the population mean ÃŽ¼. assume the population has a normal distribution. A sample if 15 randomly selected math majors has a grade point average of 2.86 with a standard deviation od 0.78. Round to the nearest

    asked by Anonymous
  216. arithmatic

    three of four numbers have a sum of 22. if the average of the four number is 8, what is the four number

    asked by Hipolito
  217. Maths calculus

    Evaluate f'(1) if f(x) =(7x+1)^2

    asked by Shudufhadzo
  218. Life orientation

    Ways in which the lack of physical fitness and proper nutrition impacts ön teens

    asked by Zandile
  219. english plzzzzzzzzz helppppp

    which word comes from a latic word meaning right or law a-lecture b-justice c-level djacket 1-b

    asked by jake plzzz
  220. Physics

    150kg cart is traveling right 3m/s. a 20kg block of coal comes from the cart at 38degrees below the horizontal. The new velocity of the cart with the block is 3.95m/s. What is the initial speed of the coal.

    asked by Frustrated
  221. algebra

    i WAS TRYING TO FIGURE OUT HOW TO GET THE LENGTH OF A SIDE OF A CUBE WHEN THE VOLUME IS 800CM^3

    asked by tara
  222. anatomy

    This structure increases the surface area of the interior wall of the small intestine

    asked by sue
  223. chemistry

    hey guys please help me answer these questions. 1. can a strong acid be diluted. explain in detail 2. can a weak acid be diluted. explain in detail 3. how does your observation of sunlight change when you place two different concentrations of food colored

    asked by sean wilson
  224. math

    Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

    asked by james
  225. algebra

    (3x-2y)square=?

    asked by Hipolito
  226. Conversion Math

    A dipole of 1 Debye is equal to 3.33 x 10^-30 C m . Show that in atomic units 1 D = 0.39345 au.

    asked by Taylor
  227. Chemistry

    how to find the mass of the substance if the only given is the molar mass???

    asked by JJD
  228. Find the distance

    Find the distance d(P1,P2) between the points P1 and P2 P1=(-1,5);P2=(2,4) d(P1,P2)=

    asked by Kayleigh
  229. math

    Will someone please help me with this problem. Simplify by factoring. ã250

    asked by Michael
  230. math

    Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x)(cos x) = (1/f(x)) f(x)= ?

    asked by tyler
  231. pre calc

    C0rr missi0n kill name id real name die

    asked by Anonymous
  232. pre+calc

    C0rr+missi0n+kill+name+id++real+name+die

    asked by Anonymous
  233. cosine and sine HELP!

    Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)(sec^2 x))-1 = (f(x))^2 f(x)= ???

    asked by tyler
  234. english plzzzzzzzzz helppppp

    1-Our small community hasn't never had so many choices of bicycle shops. a-Our small community has hardly never had so many choices of bicycle shops. b-Our small community has never had so many choices of bicycle shops. c-Our small community hasn't hardly

    asked by jake plzzz
  235. Elementary algebra multiple choice

    2x^2+3xy-4y^2= (A) 9x^2-4y^2 (B)9x^2+4y^2 (C)9x^2+4y^2-6xy (D)9x^2+4y^2-12xy

    asked by Hipolito
  236. physics

    Hm0 dug b00b pass taik pay 0ff.blue medcare x x1234567.sead h0sp

    asked by Anonymous
  237. physics

    Hm0 dug b00b pass taik pay 0ff.blue medcare x x1234567.sead h0sp.c0rr c0urt p0lice 0rder uint die c0de c0rr bylay

    asked by Anonymous
  238. Parametric Equations

    Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4

    asked by Liz
  239. Biology

    Dephosphorylation in the transuction process needs: A) protein kinases B) protein phosphatases C) single sugar like glucose D)cabohydrate

    asked by Molly
  240. calculus

    Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4

    asked by Sarah
  241. science

    how does thee sun affect large scale convection in the atmosphere?

    asked by kandybear6464
  242. math

    On an air track, a 403.0 glider moving to the right at 1.70 collides elastically with a 500.5 glider moving in the opposite direction at 3.00 . 1. Find the velocity of first glider after the collision. 2. Find the velocity of second glider after the

    asked by Wesley
  243. probability

    A computer has 12 hard drives. The probability that an individual hard drive fails within one year is .25. What is the probability that the system will have exactly 4 failures in one year?

    asked by Anonymous