Questions Asked on
January 12, 2015

  1. chemistry

    Write a balanced equation, ionic equation and the net ionic equation for the following: A) Li2SO4 + Sr(NO3)3 ---> B) H2SO4 + Na2CO3 --->

    asked by Mindu
  2. MATH

    1. The population of a city increases by 4000 people each year. In 2025, the population is projected to be 450,000 people. What is an equation that gives the city's population p (in thousands of people) x years after 2010? A) p=4x+450 B)p-450=4(x-5)

    asked by SkatingDJ
  3. english

    MUSICIANS wrestle everywhere: All day, among the crowded air, I hear the silver strife; And—waking long before the dawn— Such transport breaks upon the town5 I think it that “new life!" It is not bird, it has no nest; Nor band, in brass and scarlet

    asked by 2phoneeeeee
  4. physics

    Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 160,000 kg and a velocity of 0.300 m/s, and the second having a mass of 115,000 kg and a velocity of

    asked by Anonymous
  5. Physics

    A particle with a mass of 1.55 kg is acted on by a force Fx acting in the x-direction. If the magnitude of the force varies in time as shown in the figure below, determine the following.

    asked by Anonymous
  6. Health

    the muscular system is essential because it allows our bones to

    asked by Elizabeth
  7. Math

    [Key: /= a fraction bar] Olga ran 5 kilometers in 37 minutes. Which could Olga use to determine m, the number of minutes she would take to run 25 kilometers at this rate? A. 37/5 = 25/m B. 5/m = 25/37 C. 37/5 = m/25 D. 5/m = 37/25

    asked by Mo
  8. Science

    True or False: Tides are caused by the force of inertia from the sun and moon acting on earth.

    asked by Vanessa Skellington
  9. Physics

    A mass of 0.55 kg attached to a vertical spring stretches the spring 36 cm from its original equilibrium position. The acceleration of gravity is 9.81 m/s2 . What is the spring constant? Answer in units of N/m.

    asked by Sean
  10. algebra

    determine whether 447 is a term of each sequence(s) If so, whitch term is it ? A.t(n)=5n-3 B.t(n)=24-5 C.t(n)=-6+3(n-1) D.t(n)=14-3n E.t(n)= -8-7(n-1)

    asked by KAESHAA
  11. AP Physics

    A dart gun vertically launches a 25g dart 50 cm high. Determine the minimum energy stored in the spring when the dart gun was loaded. What would the qualitative bar graph and energy flow diagrams look like?

    asked by AnnWarren
  12. Physics

    Determine the magnitude of the gravitational force Mars would exert on man if he was on the surface of Mars. The mass of the man is 69.0kg . The mass of the Mars is 6.42×1023kg and its radius is 3396 km.

    asked by Katie
  13. solid mensuration

    in the pyramid shown in the figure , AB=9 in ., BC= 12in ,and BD= 5 in . the three face angle at B are each 90 degree . calculate the three face angles at A and the total surface of the solid.

    asked by jAN
  14. Please check my Calculus

    1. Given f(x)=-6/x, choose the correct statement A. The graph of f is concave upward on the interval (negative infinity, 0) B. The graph of f is concave downward on the interval (negative infinity, 0) C. The graph of f is concave upward on the interval

    asked by Anonymous
  15. Math

    Q. Sidney flew in an airplane five times during her vacation. The flights overaged 2 hours 28 minutes long. The lengths of her first four flights were 2 hours 10 minutes,3 hours 20 minutes,1 hour 15 minutes,and 2 hours 40 minutes. What was the length of

    asked by Destinee
  16. math

    The ratio of rock music to total discs that Ellen owns is 25/40. Paul has 50 rock music discs. The ratio of rock music to total discs in his collection is equivalent to the ratio of rock music to total discs in Ellen's collection. how many discs do they

    asked by kymy
  17. Math

    The marsh family took a vacation that covered a total distance of 1356 miles. The return trip was 284 miles shorter than the first part of the trip. How long was the return trip? My answer is 1356-284= 1072

    asked by Kennedy
  18. math

    Karen collects local and foreign coins. of the coins in her collection, 1/4 are foreign coins. Of the foreign coins,2/5 are from mexico What fraction of the collections are foreign coins that are not from mexico?

    asked by allie
  19. please help me in math

    The two-way table shows the number of people whose hobbies are reading or solving puzzles and who either ride a motorcycle or don’t ride a motorcycle. Among people whose hobby is reading, what is the relative frequency of not riding a motorcycle? Express

    asked by Aspen
  20. english

    It had been there when the midwife had announced, ‘You’ve a boy.’ The hat was there when his wife had their second little joy. Why does the author MOST likely choose the words, ‘their second little joy’? A)They had twin boys. B)It expresses that

    asked by 2phoneeeeee
  21. Physics

    As shown in the figure below, cars #1 and #2 are sliding across a horizontal frictionless surface. The cars are equipped with a coupling arrangement similar to the one on railroad cars. Car #1 overtakes car #2 and they have a totally inelastic collision

    asked by Anonymous
  22. Math

    Brenda's School is selling tickets to a spring musical. On the first day of ticket sales the school sold 3 senior citizen tickets and 9 child tickets for a total of $75. The school took in $67 on the second day by selling 8 senior citizen tickets and 5

    asked by M
  23. English

    Which adjective best describes the community's attitude toward Mari Djata's inability to walk in Sundiata? A. fearful B. indifferent C. sympathetic D. mocking B?

    asked by Jhon
  24. physics

    A woman measures the angle of elevation from her current location to a mountaintop to be 12.0°. After walking 1.10 km closer to the mountain on level ground, she measures the angle again and finds it to be 14.0°. What is the height of the mountain?

    asked by Brittani
  25. physics

    1. While strolling along on unknown planet, an astronaut decides to throw a hammer and a feather upwards at 5.0 m/s. They both return to the point of release in 3.0 s. What is the acceleration due to gravity on Planet X. 2. Marii jumps straight upward at

    asked by chen
  26. Math

    Michelle has a starting balance on a gift card for $300. She buys several dresses at $40 a piece. After her purchases she has $140 left on the gift card. How many dresses did she buy?

    asked by abby
  27. Statistics

    The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home page grew by 17% during the past 12 months. It has been estimated that the current average length of a visit to the library's

    asked by Jenny
  28. english

    Burned down to the ground, nothing left but the floor Which stylistic device does the author use in line 10 ? A)alliteration B)assonance C)personification D)repetition D? It’d seen a child die—Depression--a war, Which stylistic or literary device is

    asked by 2phoneeeeee
  29. clothing an textiles

    six ways in which control fullness in a garment explain any two methods

    asked by Anonymous
  30. Physics-Check

    In a marathon race, one runner is moving at 5.0 m/s passes a second runner moving at 4.5. What is the distance between the runners 10 minutes after the one runner has passed the other? 5m?

    asked by Lucina
  31. samoana high school

    phoebe physics pulls a wagon with a force of 80 N. a) what is the net force of friction between the wagon and the ground is 12 N. b) if she uses 80 N to pull the wagon through a med puddle, and the net force on the wagon is 38 N, what friction force asts

    asked by davina
  32. Maths

    a missile guidance system has five fail-safe components. the probability of each failing is 0.05. find these probabilities. a) Exactly 2 will fail b) More than 2 will fail c) All will fail. d) Compare the answer for parts a, b, c, and explain why these

    asked by saima
  33. Math

    The formula W = 35.74 + 0.6215T - 35.75V^4/25 + 0.4275TV^4/25 relates the wind chill temperature W to the air temperature T in degrees Fahrenheit and the wind speed V in miles per hour. Use a calculator to find the wind chill to the nearest degree when the

    asked by Anonymous
  34. history

    Question 2 (04.05 MC) Using the map and your knowledge of U.S. history, what do the details of the Rocky Mountains suggest about the Lewis and Clark expedition? The group made a grave mistake in not turning back in Missouri. The group really could have

    asked by Taylor
  35. Currently doing Math,life science,geography and ph

    I am thinking of changing physical science and do business with math,life science,business and geography what career can i pursue?

    asked by Tumi
  36. ENGLISH - GRAMMAR ????

    Are these correct? Brow - countable noun Zoo - countable Poverty - uncountable Doctor - countable cook - countable Prize - uncountable Fair - countable Town - countable Toast - uncountable Beach - uncountable Room - countable

    asked by Niya -
  37. Math

    artaud noticed that if he takes the opposite of his age and adds 40 he gets the number 28. how old is artaud?

    asked by Abby
  38. us history

    which of the following describes the main reason the Spanish conquistadors needed native american slaves? A: they needed help to find gold and send it back to Spain B: the native american slaves aided them with their tobacco crops C: the Spanish wanted to

    asked by stephanie
  39. chemistry

    The molarity of a kool-aid packet is 0.365M. How many grams of sucrose (C12H22O11) are in 200mL of the kool-aid drink? --- I know that the molar mass is 342.29648 g/mol kool-aid. I'm not sure on how to find the grams of the solute.

    asked by student01561
  40. Maths Mechanics

    A plane flies due north at 300km/h but a crosswind blows north-west at 40km/h. Find the resultant velocity of the plane. Once I have drawn I diagram it is often okay, but it is the initial steps that I struggle with.

    asked by Chloe
  41. physics

    An 85-kg jogger is heading due east at a speed of 2.0 m/s. A 55-kg jogger is heading 22° north of east at a speed of 2.7 m/s. Find the magnitude and direction of the sum of momenta of the two joggers.

    asked by Anonymous
  42. Chemistry

    2C2H2(g) + 3O2(g) 4CO(g) + 2H2O(g) What is delta G° for this reaction in J/mol? (T = 298.17 K)

    asked by Jon
  43. math

    The main span of a suspension bridge is the roadway between the bridge's towers. The main span of the Walt Whitman Bridge in Philadelphia is 2000 feet long. This is 600 feet longer than two-fifths of the length of the main span of the George Washington

    asked by Kennedy
  44. AP Physics

    A ball has an initial velocity of 3 m/s. If there is no friction, what is the highest it could roll? What would the qualitative bar graphs and energy flow diagram look like?

    asked by AnnWarren
  45. Math

    if x erasers have a weight of 80 grams, what is the total weight of 50 erasers?

    asked by Alexa
  46. Chemistry

    As a purity check for industrial diamonds, a 22 - carat diamond (1 carat = 0.2g) is heated to 63 degrees C and immersed in 26g of water in a constant pressure calorimeter. The initial temperature of the water is 23 degrees C. Calculate the ΔT of the water

    asked by Jon
  47. Please check my Calculus

    1. Find all points of inflection: f(x)=1/12x^4-2x^2+15 A. (2, 0) B. (2, 0), (-2, 0) C. (0, 15) D. (2, 25/3), (-2, 25/3) E. none of these I got D. I found the second derivative and equaled it to 0 and solved for x. I plugged the x values in to get my

    asked by Anonymous
  48. chem/math

    A car traveling with a constant speed travels 150km in 7200s. What is the speed of the car?

    asked by candice
  49. Math

    A total of 10,000 is invested into two funds paying 7.5% and 9% simple interest. The combined annual income for the two funds is $849. Determine how much is invested at each rate

    asked by Anonymous
  50. Math

    if x erasers have a weight of 80 grams, what is the total weight of 50 erasers?

    asked by Anonymous
  51. statistics

    The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?

    asked by Michael
  52. Please check my Caclulus

    1. Find all intervals on which the graph of y=(x^2+1)/x^2 is concave upward. A. (negative infinity, infinity) B. (negative infinity, -1) U (1, infinity) C. (negative infinity, 0) U (0, infinity) D. (1, infinity) E. none of these I got C. I found the second

    asked by Anonymous
  53. Maths

    College Education and Business world success R. H. Bruskin Associates Market Research found that 40% of American do not think that having a college education is important to succeed in the business world. if a random sample of five Americans is selected,

    asked by saima
  54. math

    what is 8/100, 3/5, 7/10 least to greatest

    asked by danielle
  55. Chemistry

    When a chemist burns ammonia according to the reaction below she finds that the reaction releases heat. (It is exothermic.) 4NH3(g) + 3O2(g) 2N2(g) + 6H2O(g) The enthalpy of the reaction DH = -1267 kJ. What is the enthalpy change (in kJ) when 7 grams of

    asked by Devin
  56. physics

    an airplane is flying at 300 m/s(672 mi/h).How much time must elapse before a clock in the airplane and one on the ground differ by 1.00 s?

    asked by habtamu.amogne
  57. Science please help

    Some of the water flows over the dam and is converted to energy, some water evaporates into the air. What spheres does the water, or hydrosphere interact with this example? a. Geosphere and atmosphere B. Atmosphere and biosphere C. Crysophere and

    asked by Steph
  58. math

    The temperature drops 5F each hour for 4 hours. Use en integer to express the total drop in temperature.

    asked by tanishia
  59. Chemistry

    In an acid base titration 32.5 mL of sodium hydroxide, NaOH, were neutralized by 17.6 mL of 0.180 mol/L sulfuric acid, H2SO4. Calculate the concentration of the sodium hydroxide.

    asked by Rose
  60. Science

    What is the main method of heat transfer from the core to the crust of earth? A. Conduction B. Convection C. Radiation

    asked by Steph
  61. physics

    hummingbirds beat their wings 1500 times in 30seconds calculate frequency and the period

    asked by noah
  62. Algebra

    The Badys and their maid, Alice, took a trip to Hawaii for their summer vacation. The travel agent told Ike that the trip would cost $210 for each child plus another $315 per adult. According to Ike Bady’s credit card receipt, the trip cost a total of

    asked by Anonymous
  63. maths

    Driving to work alone. It is reported that 77% of workers aged 16 and over drive to work alone. Choose 8 workers at random. Find the probability that a) All drive to work alone b) More than one-half drive to work alone c) Exactly 3 drive to work alon

    asked by saima
  64. Engkish

    Brow - countable noun Zoo - countable Poverty - uncountable Doctor - countable cook - countable rize - uncountable Fair - countable town - countable toast - uncountable Beach - uncountable Room - countable

    asked by Niya -
  65. Physics

    A block initially at rest, slides down from the top of an inclined plane 30degrees above the horizontal. The plane is 100feet long and frictionless. what distance will it travel on a frictionless horizontal surface at the foot of the plane 6seconds after

    asked by Albert
  66. physics

    A 2.50 g bullet, traveling at a speed of 485 m/s, strikes the wooden block of a ballistic pendulum, such as that in the figure below. The block has a mass of 275 g.

    asked by Anonymous
  67. To: Linda mogale

    I deleted your post because you included a phone number. Please do not post personally identifiable information on Jiskha, You should do what YOU want to do for a career.

    asked by Ms. Sue
  68. Math

    A rectangle is 26 meters long and 18 meters wide.What is the length of the diagonal of the rectangle to the nearest meter? equation: A2 + B2= C2 I don't know where to put the numbers, but I think the answer may be 32. Thank you for any help!

    asked by Matt
  69. Science

    If a certain spring stretches 9.76811 cm when a load of 17.9936 N is suspended from it, how much will the spring stretch if it is cut in half and 65.8458 N is suspended from it? Answer in units of cm.

    asked by Gabe
  70. Statistics

    If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours

    asked by Michael
  71. physics

    A 51.5-kg skater is traveling due east at a speed of 2.70 m/s. A 69.5-kg skater is moving due south at a speed of 7.50 m/s. They collide and hold on to each other after the collision, managing to move off at an angle θ south of east, with a speed of vf.

    asked by Anonymous
  72. Calculus

    suppose a car is decelerating at a constant rate of 5 m/s^2 (i.e. its acceleration is -5m/s^2) . If the car has an initial velocity of 25m/s, how far does the car travel before coming to a full stop?

    asked by Satesh Gobin
  73. statistics

    Can you explain how to do this problem The following is a list of 11 measurements: 72, 28, 56, -47, -36, -41, 21, -31, -56, 41, -54 . Suppose that these 11 measurements are respectively labeled x1, x2,...x11 . (Thus,72 is labeled x1 ,28 is labeled x2 and

    asked by mary ann
  74. Math

    Equation: t=5(logP/log0.5) P is the percentage of caffiene in the bloodstream related to t, time elapsed in hours Suppose you drink a cup of coffee at 9:00 a.m. What percentage of the caffiene will remain in your body at noon?

    asked by Zoe
  75. science

    A 5-kg cat accelerates at a rate of 2 m/s. What is the net force acting on the cat? a. 10 N b. 7 N c. 3 N d. 2.5 N

    asked by Eden S.
  76. Chemistry

    2Mg(s) + O2(g) 2MgO(s) If 9.92 g of Mg reacts with 8.52 g of O2. How many grams of MgO could be produced? I am just very confused and need an answer so that I can look back on how you got there . . .

    asked by Ellen
  77. Geometry

    If a central angle of 90 degrees defines an arc on circle R that has the same length as the arc on circle W defined by a 60-degree central angle, what is the ratio of the area of circle R to the area of circle W? Express your answer as a common fraction.

    asked by kylefreedman
  78. physics

    how much heat is needed to raise the temperature of 5kg of silver from 20 degrees C to 96 decgrees C?

    asked by patrick
  79. chemistry am i right

    Balance and complete equation H2SO4 + Na2CO3 ---> Na2SO4 + H2O + CO2

    asked by Amily
  80. Please check my Calculus

    1. Find all points of inflection of the function f(x)=x^4-6x^3 A. (0, 0) B. (0, 0), (9/2, -2187/16) C. (3, -81) D. (0, 0), 3, -81) E. none of these I got D. I found the second derivative and solved for x and plugged values into original function to get

    asked by Anonymous
  81. science

    the area drained by a river and its tributaries is called its

    asked by kayla
  82. english

    In the following sentence identify the appositive or appositive phrase and the noun or pronoun renamed by the appositive. Mr. Murray, the Scoutmaster, likes to hike. Appositive: Noun or pronoun renamed:

    asked by Danielle
  83. Math

    Out of 18 students at dance camp, 6 are boys. What is the ratio of girls to students at the dance camp, in simplest form.

    asked by Amy
  84. chemistry

    A 0.248 M ZnCO3 solution is made from 21.4 g of solute? What is the volume of the solution?

    asked by Mariah
  85. Math

    A scientist is monitoring the temperature of a holding tank containing fish to be released into a river. In one 12-h period, the highest temperature was 10.4°C and the lowest temperature was 7.6°C. Write an absolute value equation that can be used to

    asked by Alex
  86. Chemistry

    if 50 grams of sodium hydroxide mixed with 25 grams of hydrochloric acid how many grams of salt can be formed?

    asked by Anonymous
  87. English

    Which poetic line contains both paradox and consonance? One summer day, all day I drove it hard How long it might last, how young it might be Ay, look, and he'll smile thy gloom away At least to know the worst is sweet

    asked by Mariah
  88. math

    The temperature outside was 3 degrees Fahrenheit at midnight. During the next hour the temperature fell 7 degrees. What was the temperature at 1 A.M. Can u explain to me how to do it please

    asked by micheal
  89. maths

    A solid cube with an edge 10 cm is melted to from two equal cubes. Find the ratio of the edge of the smaller cube to the edge of the bigger cube ?

    asked by dk
  90. chemistry

    The ionic equation and net ionic equation and balance equation: A) Ca(OH)2 + HNO3 --> B) H2SO4 + Na2CO3 --->

    asked by Fiona
  91. Math

    Suppose you purchase 3 identical T-shirts and a hat. The hat costs $19.75 and you spend $56.50 in all. How much does each T-shirt cost? My answer 56.50- 19.75= 36.75 36.75/3=12.25 each

    asked by Kennedy
  92. physics

    A golf ball strikes a hard, smooth floor at an angle of θ = 26.4° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, and its speed is 45 m/s just before and after striking the floor. What is the magnitude of the

    asked by Anonymous
  93. Math stem question

    The main span of a suspension bridge is the roadway between the bridge's towers. The main span of the Walt Whitman Bridge in Philadelphia is 2000 feet long. This is 600 feet longer than two-fifths of the length of the main span of the George Washington

    asked by Kennedy
  94. math

    A checkerboard is 10 inches long on each side.What is the length of the diagonal from one corner to another? I know, I will need to use the equation... A2+B2=C2....but I don't know where to put the numbers. Thank you for the help!

    asked by lizzie
  95. Civics

    In the United States, which level of government has the highest authority? State *** County City National

    asked by jeje
  96. Chemistry

    A skillet made of Iron (Fe) weighing 1.8 kg is heated on a stove to a temperature of 202 degrees C. If the skillet is removed from the stove and allowed to cool to room temperature (21 degrees C), how much heat must be removed from the skillet. The

    asked by Jon
  97. Please check my Calculus

    1. Find the value(s) of c guaranteed by Rolle’s Theorem for f(x)=x^2+3x on [0, 2] A. c=-3/2 B. c=0, 3 C. Rolle’s Theorem doesn’t apply as f is not continuous on [0, 2] D. Rolle’s Theorem doesn’t apply as f(0) does not equal f(2) E. None of these

    asked by Anonymous
  98. History

    I'm doing the 5 W's (Who, What, When, Why, Where) and How for the Embargo Act but I'm having trouble finds the How part.

    asked by Amy
  99. math

    The scale balanced when n+20=80 Suppose the left side becomes n+3 How can I change the right side so that n+3=____ is equivalent to n+20=80 How can I change the right side to get an equivalent equation my choices are A. Add blank to the right side B.

    asked by Hannah
  100. science

    i need help with more questions in the packet heres my question the poisonous gas hydrogen sulfide, H2S, can be neutralized with a base such as sodium hydroxide, NaOH. THE unbalanced equation for this reaction follows: NaOH(aq)+H2S(g)→Na2S(aq)+H2O(l) a

    asked by maddy
  101. math/algebra

    Mr. Jenkins is going to buy museum tickets for a class trip. The museum director quotes him the following prices: • 20 tickets cost a total of $250. • 30 tickets cost a total of $375. • 50 tickets cost a total of $625. a. Based on these prices, is

    asked by Anonymous
  102. trigo

    two points A and B are 562 meter apart on a level stretch of road leading to a hill . the angle of elevation from A is 26degree 30minutes, and angle of elevation from B is 36degee 40minutes. how high is the hill ?

    asked by jilline
  103. math

    A cuboid measures 6cm long, 5cm wide and 4cm high. What is the total length of the edges in centimeters?

    asked by king
  104. ap chemistry

    how do you find the mass of dehydrated sample? mass of crucible and cover- 30.95 g mass of hydrated sample, crucible, and cover- 32.75 g mass of hydrated sample-? mass of dehydrated sample, crucible and cover- 1st weighing-32.47 g mass of dehydrated

    asked by LK
  105. chemistry

    What mass of precipitate is formed when 0.750 L of 2.50 mol/L CaCl2 reacts with 650 mL of 1.75 mol/L AgNO3

    asked by Greg
  106. Science

    Explain the motion of a baseball and the forces acting upon it as it leaves the pitcher’s hand and travels toward the batter at home plate. Identify the term applied to this type of motion.

    asked by Jenny
  107. Civics

    The U.S. federal and state governments are similar because both levels of government have the power to declare war on a nation collect taxes from citizens trade with foreign countries *** print currency and control banks

    asked by jeje
  108. Please check my Calculus

    1. Find all critical values for f(x)=(9-x^2)^⅗ A. 0 B. 3 C. -3,3 D. -3, 0, 3 E. none of these I got D. I found the derivative and solved for critical numbers. 2. Find all intervals on which the graph of f(x)=(x-1)/(x+3) is concave upward A. (negative

    asked by Anonymous
  109. Physics

    A 4.00-g bullet is moving horizontally with a velocity vector v = 348 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air

    asked by Anonymous
  110. Chemistry

    Calculate the total heat (in Joules) needed to convert 1.602 x 101 grams of ice at -1.383oC to liquid water at 8.554 x 101oC. Melting point at 1 atm 0.0oC Cwater(s) = 2.09 J/goC Cwater(l) = 4.18 J/goC delta Hofus = 6.02 kJ/mol

    asked by Devin
  111. physics

    A student in the laboratory connects a 13 Ω resistor, a 24 Ω resistor, and a 41 Ω resistor in parallel and then connects the arrangement to a 43 V dc source. What is the current? What is the power? (in watts)

    asked by Lo
  112. Chemistry

    HAve to find a formula to work out the energy required to thermally decompose water into hydrogen and oxygen.

    asked by Big
  113. Pre-Cal

    A wire 360 inches long is cut into two pieces. One piece is formed into a square and the other into a circle. If the two figures have the same area, what are the lengths of the two pieces of wire (to the nearest tenth of an inch)?

    asked by Jake
  114. Chemistry

    Calculate the heat transferred when a 23 g of iron nail is cooled from 67oC to 20oC. The specific heat of iron is 0.45 J/goC.

    asked by Jon
  115. Physic- help on direction (Not that good at Englis

    Galileo figured out the equation that describes the behavior of a pendulum. If you square both sides of the equation, you will find that the slope of the line is related to the acceleration due to gravity (g). Specifically, slope = 4PI^2/g. Use your data

    asked by Tara
  116. chemistry

    i have a homework packet that i am struggling with can you please help me my first question is i have to finish the following equation to balance it out my question is 3Fe3O4+blankAl→blankAl2O3+blankFe now i tried and i got 3Fe3O4+2A=2Al2O3+2Fe i don't

    asked by maddy
  117. physics

    A 0.580-kg ball is dropped from rest at a point 1.60 m above the floor. The ball rebounds straight upward to a height of 0.650 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?

    asked by Anonymous
  118. Statistics

    Did you ever buy an incandescent light bulb that failed (either burned out or did not work) the first time you turned the switch on? When you put a new light bulb into a light fixture, you expect it to light and most of the time it does. Consider 8-packs

    asked by Jenny
  119. science

    i need help with a packet that im struggling with my questions are write the total number of atoms present for the following questions: a. 4SO2 now i tried and got 8O'S and 1S b. 8O2 i tried and got 16 all together c. 3Al2(SO4)3 i tried and got 6Al, 3S,

    asked by maddy
  120. Math

    Trail Max is sold and 1 pound bags Mary will buy some trail mix and repackage it so that each of the 15 members of the biking club gets one 2/5 pound bag how many 1 pound bags of Trail mix should mary buy to have enough without leftovers

    asked by andera
  121. Socials Studies

    Toussaint Louverture was immortalized in sonnet by the British poet Wordsworth

    asked by Jack
  122. physics

    The student’s body is 22% percent efficient; that is, for every 22 J that are converted to mechanical energy, 100 J of chemical energy are expended, with 78 J going into thermal energy. How much chemical energy is expended by the student during the

    asked by allan
  123. DrBob222 my previous question

    You asked me to show my work for one of my questions a few minutes ago and i need you to verify my work because you said my answer was wrong

    asked by Sandy
  124. Physics

    An automobile has a mass of 2000 kg and a velocity of +12 m/s. It makes a rear-end collision with a stationary car whose mass is 1850 kg. The cars lock bumpers and skid off together with the wheels locked.

    asked by Anonymous
  125. history

    uncramble dropifthegoits

    asked by angelina cornolo
  126. chemistry

    The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of

    asked by Anonymous
  127. chemistry

    In an acid base titration,25.0 ml of nitric acid, HNO3, were neautralized by 28.0 mL of 0.209 mol/L calcium hydroxide, Ca(OH)2. What is the concentration of the nitric acid?

    asked by Mindu
  128. Calculus

    suppose a car is decelerating at a constant rate of 5 m/s^2 (i.e. its acceleration is -5m/s^2) . If the car has an initial velocity of 25m/s, how far does the car travel before coming to a full stop? So do I try to integrate the acceleration to find the

    asked by Satesh Gobin
  129. physics

    The acceleration of a particle which moves along the x axis is given by a=4x+5x^(3/2) The particle has speed of 2m/s when x=1m x is in meters a is in m/s^2 evaluate the velocity when x = 8m I know that I need to use kinematic eqn 3 adr = vdv then take the

    asked by Anonymous
  130. Science

    Describe genetic engineering on a cellular level. In other words, what exactly takes place during genetic engineering that inserts a trait into an organism that did not have that trait before? Give an example.

    asked by Pat
  131. physics

    A cargo plane is moving with a horizontal velocity of vx = +230 m/s at a height of y = 840 m above level ground as shown in the figure below when it releases a package. Ignoring air resistance, how much time will it take the package to reach the ground?

    asked by mathew
  132. math

    You plan to visit two different zoos but cannot decide which two to visit. On a piece of paper,you write the name of each zoo in the table. Then you select the names of two zoos at random. Are your selections independent or dependent events. Explain. B.

    asked by gabby
  133. Math

    Factor 48x+8

    asked by Kennedy
  134. math

    May takes 12 hours to type a report. Her friend helps her and together they finish the job in 4 hours. How long would it take her friend had she worked alone? Representation: Equation: Solution: Conclusion:

    asked by Tiffany
  135. Please check my Calculus

    1. Which of the following describes the behavior of f(x)=x^3-x A. Relative maximum: x=0 B. Relative maximum: x=(1/sqrt(3)); Relative minimum: x=(-1/sqrt(3)) C. Relative maximum: x=(-1/sqrt(3)); Relative minimum: x=(1/sqrt(3)) D. Relative minimum: x=0 E.

    asked by Anonymous
  136. soc102

    the relatvivist would agree with which statement about stem cell

    asked by Anonymous
  137. addmath

    Given that k,3k and k+1 are three consecutive terms of an A.P,find the numerical value of k.Then find the first term if 3k is the sixth term of the progression. Answer:k=1over4 a=-7over4 I got the k but the a i can't get

    asked by mandy
  138. Physics

    Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next. When you increase your speed by 7.0 mi/h, the time to go one mile decreases by 14 s. What was your original speed? Please explain me step by step

    asked by Big boss1
  139. addmath A.P.

    The first three terms of an arithematic profgression are x,2x+y and 9x-y.The sum of these three terms is 60.Find the numerical values of x and y.Then,calculate the eleventh term of the progression

    asked by mandy
  140. Calculus

    F(x) = 3/4x^4 –x^3 -3x^2 + 6x Determine the interval(s) where f(x) is increasing (if any) and the interval(s) where f(x) is decreasing (if any). How do I know where f(x) is increasing or decreasing?

    asked by Matthew
  141. chemistry check my answer

    In an acid base titration 32.5 ml of sodium hydroxide were neautralized by 17.6 ml of 0.180 mol/l sulfuric acid. Calculate the concentration of the sodium hydroxide. I asked this question earlier but i wanted to make sure i got the right answer My answer:

    asked by Sandy
  142. legal research writings

    Which of the following legal publications is NOT typically updated with pocket parts? A.Legal encyclopedias B.Legal dictionaries C.Digests D.Treatises I thought it was B The LexisNexis case abbreviation is: LX LN LE LEX I think it's LN

    asked by Anonymous
  143. chemistry Drbobz222

    How do i convert mols CaCl2 to AgCl

    asked by Danny
  144. math

    earned $296.00 and worked for $8.00 per hour. how many hours did she work?

    asked by mary
  145. Math

    Kayla went to a football game. Her team scored 6 times, and got the extra point each time. A touchdown with an extra point is worth 7 points. How many points did her team score? If the other team scored 2 more times than her team and got 7 each time, how

    asked by Ty
  146. Civics

    Which of the following is an example of a power the U.S. Constitution delegates to the national government? Print and coin money Charter new banks *** Make laws about marriage Determine voter qualifications

    asked by jeje
  147. Chemistry

    1.984 g of a hydrate of K2CO3 is dissolved in 250. mLs of H2O. 10.0 mLs of this solution is tirade against 0.100 M HCl, producing the following results. Flask 1 - Initial 0, final 9.2 Flask 2 - Initial 9.2, final 18.3 Flask 3 - initial 18.3, final 27.8

    asked by Candice
  148. physics

    Kevin has a mass of 77.5 kg and is skating with in-line skates. He sees his 21.00 kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 2.18 m/s. Ignoring

    asked by Anonymous
  149. mathematical literacy

    Are there available degrees relating to comerce, that can be done with Maths Lit, and not Maths. Preferably at a good institute like uct, uj, ukzn, etc.

    asked by vladimir
  150. Geogeaphy

    The higher the latitude the ( cooler, warmer) the temperature will be? Answer: cooler

    asked by HELP! Review
  151. chemistry exercises

    The concentrated H2SO4 of 155g dissolved in enough amount of water if acidic solution is 2.3L a) what is the mole of H2SO4 b) what is the concentration H2SO4 c) what is the concentration of H+(H3O+) created in the solution d) what is the PH value of

    asked by Anonymous
  152. science

    Which cells do the authors identify as the ones most likely to hold the key to increased human longevity and vitality and how might this work? Describe one alternative to cloning that the authors mention.

    asked by Pat
  153. chem

    When solid calcium is placed in water, it undergoes a vigorous reaction that produces solid calcium oxide, CaO(s) and hydrogen gas. determine the volume of dry hydrogen gas that is produced when 5.00 g of calcium reacts and the gas is collected at 42

    asked by julie
  154. math

    John is now two years older than Martha. If Martha's age is represented by x, what will be their total ages after 10 years?

    asked by king
  155. Please check my Calculus

    1. Find all points of inflection of the function f(x)=x^4+x^3 A. (0, 0) and (-½, -1/16) B. (-½, -1/16) C. (0, 0) D. (0, 0) and (-¾, -27/256) E. none of these I got A. I found the second derivative and solved for x and plugged in the values to find the

    asked by Anonymous
  156. trigonometry

    a surveyor 1standing on a highway observed the angle of elevation of the airplain as 22.5°. at the same time, a surveyor 2 observed the angle of elevation of the same airplane to be 30°. if the airplane was 850m directly above a point on the highway,

    asked by betty
  157. math

    The value of a telephone calling card decreases 20cents for each minute used. Write an integer to express the change in the cards value for a 4 minute call. Use a negative number to represent the card losing value.

    asked by tanishia
  158. english

    I am confused on the use of good, well; real, really; bad, badly. Cats can see good/well in the dark. I think well because it describes how they see(an adverb) After the storm the pier was damaged bad/badly. I think badly because I tells how it was damaged

    asked by Kelley
  159. Calculus

    I get mixed up when graphing derivatives. If I'm given the graph of f how do I get f' and f"?

    asked by Anonymous
  160. Math

    Which expression represents the difference of (3y+2)-(y-1)? I put 2y+ 3 for my answer.

    asked by Sierra
  161. mats

    A soft drink can has a circular base with diameter 7 cm and height 12 cm. What is the different in their capacities?

    asked by dk
  162. ENGLISH - GRAMMAR ????

    There was no space in the drawing room. - Drawing room - uncountable The sand on the beach was clean. beach - uncountable Ruman met with an accident. Accident - uncountable Are the above are correct?

    asked by Niya -
  163. chemistry

    What volume of 1.34 mol/L hydrochloric acid, HCI is expected to react completely with 6.89 g of calcium

    asked by Ana
  164. Science please help thx

    Convection cells are created by very hot material deep in the mantle rising, then cooling, sinking again and repeating the cycle. This process occurs because of the uneven distribution of ? Within the earth? Please fill in the question mark with a answer.

    asked by Steph
  165. Social Studdies

    Why were the colonists angry about British taxes after the war between Britain and France ?

    asked by Samuel Reingold
  166. Chemistry

    Calculate the pH and pOH of a hydrochloric acid solution prepared by dissolving 30.50-kg of hydrogen chloride gas in 806-L of water at SATP.

    asked by Hello
  167. Math

    The solution set to the inequality:-2x^2+8x-6>0 is ?

    asked by Alex
  168. Statistics

    A company that produces rivets used by commercial aircraft manufactures knows that the shearing strength (force required to breaking) of its rivets is a major concern. The company believes the shearing strength of its rivets is normally distributed with a

    asked by Jenny
  169. Math

    A school band is having a fundraiser. Band members will sell coupon books for $10 each. The band earns $12.50 for every 5 coupon books that are sold. a. After the first week, the band members had sold 105 coupon books. How much money did the band members

    asked by Anonymous
  170. Dynamics

    The acceleration of a particle which moves along the x axis is given by a=4x+5x^(3/2) The particle has speed of 2m/s when x=1m x is in meters a is in m/s^2 evaluate the velocity when x = 8m I know that I need to use kinematic eqn 3 adr = vdv then take the

    asked by elaine
  171. Algebra

    "Using distributive, associative, or commutative property, prove that x^2 - 4 is equivalent to (x - 2)(x + 2)." Firstly, which property would I use to solve this and show equivalence? Secondly, which steps would I need to take in order to show this/obtain

    asked by Stacie
  172. Do newspapers, magazines, television, radio, movie

    Im not sure what directing to go for this essay, i have changed it 3 times. can someone tell me if this would be correct? The answer is media doesn't decide what is important, The creators put out there what they think will catch peoples eyes, boring

    asked by liv
  173. Geography

    _________ is the dry side of the mountain because the mountain blocks winds carrying moisture. Answer: east side

    asked by HELP! Review
  174. science

    name four phylum under the five kingdoms

    asked by gloria
  175. math

    The value of.a telephone calling card decreases 20cents forma each minute used. Write en integer to express the change un the cards value for a 4 minute call.

    asked by tanishia
  176. alegebra 2 Help

    simplify the compound fraction: ((x+h)^(-3)-x^(-3))/(h) where do i start?

    asked by roger
  177. Algebra

    Solve the inequality. Graph the solution on a number line. -2 ≤ d + 0.5 ≤ 4.5

    asked by Anonymous
  178. propability

    Lorenzo has a jar with 21 green olives and 15 black olives in it. If he takes two olives out of the jae with replacement,what is the probability that the first olive will be black and the second olive will be green?

    asked by darrin
  179. chemistry

    What volume of 1.34 mol/L hydrochloric acid, HCI, is expected to react completely with 6.89 g of calcium?

    asked by Jack
  180. math

    San Diego left San Francisco on Tuesday at 6.30 p.m. and took 8 hours 45 minutes to reach his home. On what day and at what time in a 24 hour system did he reach home?

    asked by king
  181. math

    The value of a telephone calling card decreases 20cents for each minute used.write an integer to express the change in the cards value for a 4 minute call.

    asked by tanishia
  182. 7th grade math honors

    The total cost for renting a kayak is represented as 25+5.50m. What is the constant in the expression 25+5.50m? Show work.

    asked by Kennedy
  183. math

    If two number cubes are rolled what is the probability of getting a 1 on both cubes?

    asked by tank
  184. help me please maths

    Find the value of 3a + 2b when a = 6 and b = 5. answered????????!!!1111

    asked by keerthtika
  185. Math

    (-y^2)^2= ?? Is it -y^4? A negative answer??

    asked by Anonymous
  186. Calculus

    Find the point on the parabola x+y^2=0 that is closest to the point (0,-3).

    asked by Anonymous
  187. Calculus

    Find the height of street light that is 12 feet tall. How tall is the light. Write in sentence form, do not forget units of measure.

    asked by Francine
  188. Math

    At a tournament, 2 different games went on for a total of 93 mins. If 1 game took 13 mins longer than the other, how long did it take to complete each game.

    asked by Robin
  189. physics

    While you are in detention after school, your teacher tells you to slide a large, 89.7 kilogram box across the floor. The coefficient of static friction (ìstatic) between the box and the floor is 0.50. Compute the force parallel to the ground (F

    asked by Drew
  190. Math

    What rational number is less than 0 but greater than -1/2? I think its negative 1/4 would I be right? Thank You for your help.

    asked by Kyle
  191. english

    how to teach a fourth grader spellings?

    asked by sreeja
  192. Math

    If I were to compare -(-9)and -[-9] would it be less than, more than or equal to? I say it is equal to. Would I be right? Thank You for your help.

    asked by Kyle
  193. Math

    What transformation happens from In x to 3 In x? Also, I had thought that 3 In x and In x^3 are the same, but the graphics calculator shows otherwise.

    asked by Anonymous
  194. Math

    The velocity of an object is given by the formula v=25t-80, where the time is expressed in seconds and the velocity is expressed in feet per second. Find the times when the magnitude of the velocity is equal to 60 ft/s. (3 marks)

    asked by Alex
  195. Maths

    Tyson talked with 150 customers on his shift yesterday. Of those, 20% resulted in a successful upsell of additional purchases. If Tyson makes a $6 commission on top of his regular salary for each successful upsell that he makes, how much commission did he

    asked by Alana
  196. Math

    Is 2square root 6 the same as square root 6?

    asked by Anonymous
  197. Math

    How to simplify 5^(4/3)? by writing it in radical form?

    asked by Anonymous
  198. English

    Make sentences from avoid, honest, dwell

    asked by Anonymous
  199. Algebra

    Write an equation of a line that is parallel to y = 3x – 5 and goes through the point (3, 1).

    asked by Anonymous
  200. Make english sentences

    Make sentences from avoid, honest and dwell

    asked by Anonymous
  201. algebra--1 question

    Find the slope of a line that passes through (-2, -3) and (1, 1) 1/3 1 2 4/3 How do I do this? pls help asap! thanks.

    asked by SkatingDJ
  202. Algebra

    Tell if the following pair of lines is parallel, perpendicular, or neither. 3x - 2y= 16 y= -2/3x + 4

    asked by Anonymous
  203. 12 U Math

    Solve and check for extraneous roots. log_2x+log_2(x+2)=3 * _2 is a subscript and (x+2) isn't a superscript*

    asked by Vikki
  204. Statistics

    Can someone help me with this question. I am so very confused. Find the y-intercept of the line whose equation is y=0.7x +6.2. could the answer be 5

    asked by mary ann
  205. Algebra

    Write an equation in point-slope form of the line that has a slope of 1/2 and passes through the point (5, -2).

    asked by Anonymous
  206. math

    A school band is having a fundraiser. Band members will sell coupon books for $10 each. The band earns $12.50 for every 5 coupon books that are sold. a. After the first week, the band members had sold 105 coupon books. How much money did the band members

    asked by Anonymous
  207. math

    The distance (in) is 3.5 in one second how much would it be in 4 seconds???

    asked by Aliza Morales
  208. Algebra

    Write an equation in slope-intercept form of the line that contains the points in the table. X Y 1 9 4 10 7 11 13 13

    asked by Anonymous
  209. physics

    A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 270 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.6 m/s relative to the shore, and then hops onto an identical

    asked by Anonymous
  210. English 122

    How are argument sources most relevant to researcheresearchers

    asked by Laquita
  211. Science

    Star athletes like Peyton Manning can travel to Europe to receive stem cell treatment that is not available in the US. What should be our general guidelines about this and other type’s experimental treatments?

    asked by Pat
  212. math

    3/7, 5/6, 4/5 least to greatest

    asked by Kara
  213. Math

    For every 1/2 mile that daylan jogs he walks 3/4 mile. What unit rate gives the number of miles daylan jogs for every mile she walks

    asked by Ketisha
  214. Physics

    suppose you have a weight of 60 N. if the earth's mass decreased to one fourth its current mass, with no change in radius, then what would you weigh? Can you please explain how I can solve this problem?

    asked by Alexis
  215. Chemistry (Acid-Base)

    I'm a tad confused by the question, The protonation constant for the acid HA has the value K=2*10^6. (a) what is the principal species at pH 6.00? (b) what is the principal species at pH 9.00? (c) what is the quotient [A-]/[HA] at pH 6.3 and 7.5?

    asked by Matt
  216. Math

    Write an algebraic expression for the following verbal expression. Let n = the number Six less than the product of 12 and a number

    asked by Amy
  217. math

    allow 2 summers of working, Samuel has decided to invest his earnings. SAMUELS BANK OFFERS TWO CDS, a preferred CD $10,000 minimum at 1% interest, or a standard CD with $7000 minimum at 2%interest earned annually. Samuel has $8000 to invest. how many years

    asked by donny humphreys
  218. geometry

    I have the basal and volume as hints to find out about the object's height. Is there a specific formula I can follow?

    asked by Potato
  219. math

    Two cities on a map are 2 and 1/4 inches apart. The cities are actually 112.5 miles apart. How many miles is represented by one inch? What is the actual distance between two cities that are 4 and 3/4 inches apart? Use proportions

    asked by Linda
  220. Geometry

    A hand drum has a diameter of 14 7/8 inches and is 3 in deep. What is the amount of hide needed if the hide only covers top and lateral faces? *what are lateral faces? Thanks!

    asked by Lucina
  221. Geometry

    I realize I'll get a reply in the morning so... A squash ball must have a diameter either 0.5 mm either above or below 40 mm. a) What is the minimum and maximum surface area of a squash ball? Express answer to nearest square millimetre. Minimum: 4902

    asked by Lucina
  222. math

    At a school prize giving day the number of men was half of women. The number of children was three times that of women. The number of women who attended was 3x. What was the sum of the men and children?

    asked by king
  223. math

    In the following triangle, AB ⊥ CD and AC ⊥ BC CD is the bisector of triangle ABC If AD = 16m, and CD = 8m, find BD

    asked by jim
  224. chemistry

    2) At 298K, what are the molarities of pure water?

    asked by Anonymous
  225. Math

    How do I find the area of a wall? 15 feet by 9 feet

    asked by Amy
  226. algebra

    how do i find the scale factor??

    asked by austin
  227. Maths literacy, accounting, economics and business studies

    Are ther any possibilities of studying an Accountant career with this subjects?

    asked by Phillip
  228. chemistry

    how many HCl needed to dissolve 1 grams of Al2O3.

    asked by amjad
  229. algebra 2

    simplify the compound fraction: ((x+h)^(-3)-x^(-3))/(h)

    asked by roger
  230. algebra 2 help

    if 3abs(x+4)=8, then x=? A. {-10,2} B. {-2,2} C. {-19,11} D. {-22,-14} which one? idek I think is B but i am not sure help

    asked by roger
  231. Math

    How do you find the area of a city that is 16 miles wide and 15 miles long

    asked by Amy
  232. History

    Imagine that you are taking a journey around the Roman Empire. Write a letter home discussing your travels and talking about the achievements of Rome.

    asked by Daniela
  233. Economics

    5. (paradox of) VALUE = (blank) + (blank). 16. (Blank) is a situation when production cannot reach its full potential because resources are available, but not being used. These are the only two questions that I can't figure out on my study guide. Help?

    asked by Alex
  234. math

    find the simple interest on naira 28 for 25 years at 1 percentage per annum.

    asked by sam
  235. Math

    x=3-3y in slope intercept form Is it y=-1/3x+1

    asked by M
  236. Math

    x+3y=-6 in slope intercept form Is it y=-1/3x-2

    asked by M
  237. maths

    solve 7n + 13 = 5n + 20

    asked by keerthtika
  238. Math

    how to understand and visualize 0.7X0.7 and (1/4)X(4/5) in terms of repeated addition?

    asked by plz someone answer this