Questions Asked on
November 21, 2016

  1. Social studies

    How are capital resources used in production

    asked by Anonymous
  2. american goverment check answers

    9. What criteria might a judge who abides by a philosophy of judicial restraint use to decide a case? (1 point) The judge would consider previous court decisions on the topic but ultimately consider the current circumstances and changes in society. The

    asked by Anonymous
  3. TIP MATH!

    Explain how mental math can be used to estimate a 15% tip on a taxi ride that costs $23.25. PLZ HELP! BE VERY Descriptive on how you did this! I'm Sick Today So I've Barely Have Brains To Do This Today, So HELP!!!

    asked by Agal
  4. American Government

    "With the existing colonies or dependencies of any European power we have not interfered and shall not interfere....Our policy in regard to Europe...Remains the same, which is, not to interfere in the internal concern of any of its powers..." 1) Which

    asked by Juliet
  5. ss

    1.Who Were Among the first permanent White settlers in Oregon. A.Farmers B.Trappers C.Missionaries D.traders 2.What was the Rendezvous and why was it important to the maintain men a:it was the largest trading company in the west and the mountain men traded

    asked by hehell
  6. math

    Find the coterminal angles for 8pi/3. I found one: 8pi/3 - 2pi= 2pi/3 My textbook says that I should add subtract 4pi to find the other one and I'm very confused as to how you know what to add/ subtract.

    asked by Emily J
  7. Math

    Write the number in two other forms 0.326

    asked by Triston
  8. Biology (please help!!)

    Explain the process that takes place in the stroma including and reactants going in nd the products produced from these processes in a. bright sunlight and in b. darkness. c. what happens over an extended period of darkness of many days? What I need to

    asked by Sara
  9. English

    1. I am already late. 2. I have already been late. 3. It was already late. 4. It had already been late. 5. It has already been late. ---------------------------- Can we use all the expressions?

    asked by rfvv
  10. Chemistry

    1.654 of a hydrated acid H2C2O4.xH2O was dissolved in water and the soultion was made up to 250cm3 . 23.80cm3 of this solution required 25.00cm3 of 0.100moldm-3 NaOH to reach the end point. Identify the value of x and the formula of the hydrated acid

    asked by Jemma
  11. physics

    suppose the experiment was conducted on the surface of the moon of about 1-6th that of the earth. If a single period takes exactly 1.00 second, how long does a period take on the moon ?

    asked by Briana
  12. physics

    (1) a car travelling at a constant speed of 20ms-1 overcomes a constant frictional resistance of 300N. What is the horse power of the engine? ( take 1h.p = 3/4 kw)

    asked by samuel
  13. Math

    Ricky took a survey in the fifth grade and found that 2/3 of the students ride the bus to school and 1/4 of the students walk. What fraction of the fifth grade students either ride the bus or walk to school?

    asked by Mark
  14. Physics

    A 1200 lb sleigh is pulled along a horizontal surface at uniform speed by means of a rope that makes an angle of 30 degrees above the horizontal. If the tension in the rope is 100 lb., what is the coefficient of friction?

    asked by Lian
  15. Chemistry

    A sample of carbon monoxide was collected over water at a total pressure of 752 torr and a temperature of 15°C. What is the pressure (in torr) of the carbon monoxide?

    asked by Andrew
  16. Physocs- Components of Resultant Vectors

    The force vector A has components Ax= 5N, Ay= -3N. The force vector B has components Bx= 5N, By= 4N. What are the component of the resultant force vector C=A+B?

    asked by MM
  17. Physics-Tension Force

    A strong, weightless rope has a 0.15 kg mass hanging from the middle of it. What tension force will make the rope horizontal, corresponding to θ=0°?

    asked by MM
  18. Chemistry

    To what pH should you adjust a standard hydrogen electrode to get an electrode potential of -0.122 V ? (Assume that the partial pressure of hydrogen gas remains at 1 atm.)

    asked by L
  19. American government

    How have NATO's operations changed over time ? A.) NATO only directs peacekeeping measures now B.) NATO no longer defends Western Europe C.) NATO has fewer member countries now than when it began D.) NATO's activities now include crisis management and

    asked by Taylor
  20. Physics

    You row a boat perpendicular to the shore of a river that flows at 2.5 m/s. The velocity of your boat is 4.5 m/s relative to the water. (a) What is the velocity of your boat relative to the shore? (b) What is the component of your velocity parallel to the

    asked by HELP
  21. child care managment

    6. Child care staff should integrate health education into child care programs for A. local police and emergency workers. B. neighbors of young children. C. children, staff, and families. D. the entire communit

    asked by sanam
  22. Math

    1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54*** b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the

    asked by Embershy
  23. social studies

    On November 12, 1815 Elizabeth Cady Stanton spokesperson for the rights of women was born in Johnston, New York. Stanton formulated the philosophical basis of the woman suffrage movement, blazing a trail many feared to follow. Stanton verbal brilliance

    asked by anonymous
  24. Math

    Draw a model. Then, write the numerical expressions. the sum of 21 and 4,doubled.

    asked by Bobby HELP
  25. Math

    If thrice of "A's" age 6 years ago be subtracted from twice his present age the result would be equal to his present age. Find "A's" present age.

    asked by Ana
  26. Algebra

    The coordinates of quadrilateral VXY Are given below. Find the coordinates of its image after a dilation with the given scale factor V(6, 2), W(-2, 4), X(-3, -2), Y(3, -5) scale factor of 2 Do I just multiply the coordinates by each other?? V(12 x 4) W(-4

    asked by Clara
  27. Algebra pt. 2

    Relating back to my question below I think I have it.. I multiplied the coordinates by 2 and got.. V 12 4 W -4 8 X -6 -4 Y 6 -10 Here is my question of the previous post.. The coordinates of quadrilateral VWXY Are given below. Find the coordinates of its

    asked by Clara
  28. algebra

    The revenue function for a bicycle shop is given by R(x) = x · p(x) R x x p x dollars where x x is the number of units sold and p(x) = 100 − 0.4x p x 100 0 4 x is the unit price. Find the maximum revenue.

    asked by Anonymous
  29. Science

    Balance chemical equations using the first 20 elements

    asked by Clinton Darlington Yartey
  30. Math fractions

    kate is using fraction strips to add 4/10 and 4/5 she uses one whole strip to represent the sum. how many fifths strips does she need to complete the sum?

    asked by Marcy
  31. Math

    a student answered 86 problems on a test and got a 98%. How many problems were on the test?

    asked by Julie
  32. Physics

    A baseball with a mass of 0.145 kg is thrown straight down at the ground. At a particular speed, it has a drag force of 0.4 N acting on it. What is its acceleration at that time? a. -7.0 m/s2 b. -2.8 m/s2 c. -9.8 m/s2 d. -12.6 m/s2

    asked by MM
  33. Math

    A tree broke due to storm at a point but did not get separate . its tops touched the ground at a distance of 10 m from its base if the height of the point from the ground at which the tree was broken is 12\25 of the total height of the tree find its height

    asked by Vaivhav
  34. Physics- Baseball thrown upwards, accleration

    When a baseball is thrown straight upward, what is its acceleration at its greatest height? a. 9.8 m/s2 upward b. 9.8 m/s2 downward (my answer?) c. 0 m/s2 d. 9.8 m/s2 horizontally

    asked by MM
  35. Chemistry

    Is "a color of solution becoming less intense due to dilution" maybe evidence of chemical reaction or not?

    asked by Anonymous
  36. Physics- Accleration of a Falling Penny

    A visitor to the observation deck of a skyscraper manages to drop a penny over the edge. As the penny falls faster, the force due to air resistance increases. How does this affect the acceleration of the penny? a. The acceleration decreases b. The

    asked by MM
  37. Physics

    in air, an object weights 15N. when immersed in water, it weights 12N. when immersed in another liquid, its weights 13N. determine the density of the object, the relative density of the object and the density of the other liquid?

    asked by Joehannah
  38. Chemistry

    Carbohydrates (such as C6H12O6) undergo combustion with oxygen to produce carbon dioxide and water. Living things use this reaction (a process called respiration) to produce energy. Determine the mass of carbohydrates consumed for every 0.300 mol of oxygen

    asked by Ryan
  39. Physics- Equilibrant Force

    Two movers are pushing a large crate with a force of 50.0 N each. One pushes north, the other east. What is the equilibrant force? a. 71 N Southwest b. 50 N Northeast c. 100 N Southeast d. 71 N Northeast

    asked by MM
  40. pe

    True or False: The more active you are, the fewer calories you should eat. A. TRUE B. FALSE

    asked by the emo girl </3
  41. mathematical methods for economics

    in a class of 300 students,they were given mathematics test in three subjects namely,economics,statistics and mathematics,90 students failed in economics,100 failed in statistics,96 failed in mathematics,60 failed in economics and statistics,64 failed in

    asked by sonu
  42. Social Studies

    Why did Adams increase the size of the American Navy? a.) He wanted to prepare for an all-out war on Britain. b.) He hoped it would deter more attacks by French ships. * Is this right?

    asked by Dylan
  43. Physics

    Water drops from a waterfall 84 meters high .The temperature of the water at the bottom is found to be 26.2 degrees Celsius. Calculate its temperature at the top of the waterfall

    asked by Leslie
  44. Human and Social Biology

    In guinea pigs short hair S,is dominant to long hair. A heterozygous guinea pig mated with a homozygous recessive pure breed. State the proportion of the geno type and the phenotype of the offspring

    asked by Ancela Williams
  45. Social Studies

    7. What two answers are reasons that Congress decided the election of 1800? a.)Based on the outcome, it was mandated by the U.S. Constitution.* b.)The popular vote was a tie. c.)No candidate won the electoral vote.*

    asked by Dylan
  46. Physics

    A 0.14 kg baseball is pitched at a speed of 35 m/s. If it is hit straight back at the pitcher with a force of 5400N exerted over a time interval of 1.0 millisecond, find: the distance that the baseball was in contact with the bat (hint, use d = Vave*t)

    asked by Louren
  47. Physics- Object Reaches Maximum Height

    When an object that has been thrown into the air reaches its maximum height, which is true? a. its velocity is zero. b. it is at its terminal velocity. c. it is not in free fall. d. its acceleration is zero.

    asked by MM
  48. Statistics

    Please help I don't know how to solve this problem : Trevor is interested in purchasing the local hardware/sporting goods store in the small town of Dove Creek, Montana. After examining accounting records for the past several years, he found that the store

    asked by Amy
  49. Physics

    A bullet traveling at 200 m/s strikes a soft wood and penetrates 4.5 cm through it before coming to rest. Calculate the bullet's average retardation

    asked by Kaniel
  50. Income tax

    Steve and Sue are married with three dependent children. Their 2015 joint income tax return shows $389,000 of AGI and $60,000 of itemized deductions made up of $30,000 of state income taxes and $30,000 of charitable contributions.

    asked by Teresa
  51. epidemiology

    The prevalence of previously undetected diabetes in a population to be screened is approximately 1.5% and it is assumed that 10,000 persons will be screened. The screening test will measure blood serum sugar content. A value of 180 mg percent or higher is

    asked by jessy
  52. Maths

    The product of two consecutive positive integers is added to the larger of the two integers. Prove that the result is always a square number. Thank you for your help.

    asked by Anonymous
  53. Statistics

    The life span of a calculator manufactured by the Intel Corporation has a normal distribution with a mean of 54 months and a standard deviation of 8 months. The company guarantees that any calculator that starts malfunctioning within 36 months of the

    asked by Scarlett Garcia
  54. Math

    Michael purchased a certain number of share of one stock for a total of $308. The second stock was selling for $3 less per share . Michael could have bought 6 more shares of the second stock for the same amount of money. How many shares of the first stock

    asked by Khalilah
  55. Physics

    A wheel rotating initially at an angular velocity of 1.0 rad/s, accelerates over a 10 S interval at a rate of 0.1 rad/s^2. What angular displacement does the wheel undergo in this 10 S interval, in terms of revolutions?

    asked by Joey
  56. IUPUI

    The prevalence of previously undetected diabetes in a population to be screened is approximately 1.5% and it is assumed that 10,000 persons will be screened. The screening test will measure blood serum sugar content. A value of 180 mg percent or higher is

    asked by jessy
  57. Chemistry Lab

    So I have a lab exam tomorrow and our instructor said that one of the questions would be as follows: Prepare 100mL of 0.03 M Copper Sulfate, beginning from copper sulfate pentahydrate. Calculate the exact molarity to 3 sig figs. Alright so I understand how

    asked by Jake
  58. Maths help asap please.

    The product of two consecutive positive integers is added to the larger of the two integers. Prove that the result is always a square number. Thank you for your help.

    asked by Anonymous
  59. Math

    A number is as much greater than 21 and is less than 71. The number is?

    asked by Ana
  60. Physics

    An astronaut lands on a distant planet and places a mathematical pendulum with a length of 50 cm. He measures that the pendulum makes 100 oscillations in 136 sec. What is the gravity acceleration on that planet.

    asked by Anonymous
  61. American government

    "With the existing colonies or dependencies of any European power we have not interfered and shall not interfere....Our policy in regard to Europe...Remains the same, which is, not to interfere in the internal concern of any of its powers..."  Which

    asked by .....
  62. Math

    The temperature Rose 13°f between noon and 5 p.m. and then fell 7°F from 5 p.m. to 10 p.m. if the temperature at Noon is 75°f what would the temperature be at 10 p.m.

    asked by Bigdawgtayy
  63. Physics

    The electric field between two equally but oppositely charged parallel plates is 2.35 N/C [south]. If a charge of –2.00 C was placed at the midway point between the plates, what force (magnitude and direction) would act on the charge? Give the direction

    asked by Humera
  64. Help needed

    which number is a perfect cube a.7 b. 25 c. 66

    asked by Bill Cipher
  65. physics

    A uniform rigid rod of mass 1kg and length 30cm. Find the moment of inertia of the rod about an axis perpendicular to the rod through on end.

    asked by Kevin Land
  66. Social Studies

    Which made trade among the states difficult under the Articles of Confederation? A. Trade policies set by the central government favored the larger states. B. Each state printed its own money. C. The central government taxed goods moving between states. D.

    asked by Kalie
  67. math

    A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1​ inch. margin on each side and a 2​ inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal

    asked by nick
  68. Math

    Michael saves $423 dollars a month for college. About how much will he have saved after 4 years?

    asked by Bobby
  69. statistics

    To observe the effect of increasing sensitivity, assume a blood sugar screening level of 130 mg percent, with a sensitivity of 44.3% and a specificity of 99.0%. Set up a two by two table with the appropriate numbers in each cell. Calculate the following

    asked by jessy
  70. Physics

    A 1 kg mass attached to a 1 m string is rolled around in a horizontal circular path with an angular velocity of 100 RPM what is the tension of the string? Please show how you got your answer.

    asked by Joey
  71. Math

    Draw a model. Then,write the numerical expressions. 5 times the sum of 7 and 23.

    asked by Bobby HELP
  72. Algebar

    81x^(6)-25y^(10) Factor

    asked by ray
  73. Chemistry

    8.8 g of iron(II) sulphide reacts completely with excess dilute hydrochloric acid. Calculate the volume of hydrogen sulphide evolved, measured at 18 º C and 729 mmHg pressure.

    asked by Christopher Penner
  74. Physics- Equilibrium

    Which of the following is in equilibrium? a. an object that was thrown straight upward at the moment it has zero velocity (my answer) b. an object moving in a circle at constant speed c. an object that moves at constant velocity d. an object that moves at

    asked by MM
  75. Math

    A man sold a chair and a table together for $1520 thereby, making a profit of 25% on chair and 10% on table. By selling them together for $1535 he would make profit of 10% on the chair and 25% on table. Find the cost price.

    asked by Dy
  76. American government

    American foreign aid might be used to support which of the following foreign policies? A) Deterrence B) Containment C) Collective Security*** D) Isolationism

    asked by .....
  77. Social Studies

    How Would You Describe the Land Elevation At The Start of His Journey In North America?

    asked by Misty
  78. calculus

    suppose that c(x)=3x^3 - 12x^2 +9000x is the cost of manufacturing x items. find a production level that will minimize the average cost of making x items

    asked by bob
  79. Maths

    Within a square land, Asmo cut out a rectangular land with width of 10 meters (as shown below), the remaining land’s area is 1575 square meters. The area of cut out rectangular land is ______ square meters.

    asked by Ben
  80. American Government

    1) Why was the Department of Defense created? A) to place the U.S. Army and Navy in one executive department B) to establish a military chain of command C) to end disagreements between the U.S. Army and Navy D) to lessen the instance of military abuse of

    asked by Juliet
  81. Chemistry 20

    If 4.56 mol of zinc react with excess copper (ii) sulphate, how many moles of precipitate will be formed?

    asked by David
  82. Chemistry

    How many moles of air must be pumped into a 4.8 L tire to give it the pressure of 47.1 psi at 25°C ? I'm not sure how to even start doing this problem.

    asked by Amanda
  83. S.S

    1. In Marbury v. Madison, the Supreme Court established a principle that would eventually be used by all courts to--- strike down any law that the court deems unconstitutional decide the outcome of contested election results overturn any impeachment that

    asked by I cant do this please help!
  84. chemistry

    Explain why sodium carbonate against hydrochloric acid titration using phenophthalein titration do not go to completion but stop at the sodium hydrogen carbonate stage.

    asked by Bright
  85. Social Studies

    Which made trade among the states difficult under the Articles of Confederation? A. Trade policies set by the central government favored the larger states. B. Each state printed its own money. C. The central government taxed goods moving between states. D.

    asked by Kalie
  86. Math

    Ivanna has scored 70 , 65 , 65 , 64 , and 62 on her previous five tests. What score does she need on her next test so that her average (mean) is 69 ?

    asked by Amoiraine
  87. Social Studies

    What were the Articles of Confederation? A. a document created by the Continental Congress that served as a governmental plan for the nation as a whole B. a document created after the states had written their constitutions that included the powers and

    asked by Kalie
  88. Econ math/logarithms

    If log with base b (2)=0.39 and log with base b (3)=0.61 evaluate the following. log with base b (8). Simplify your answer. How to start? I thought I am supposed to write log base b 2^3 but I don't seem to get an answer that would fit.

    asked by Ben
  89. Chemistry

    A patient requires 0.012 g of painkillers available as a 15 mg/ml solution. How many ml should be administered?

    asked by Turtel
  90. Math

    Ten years ago the age of the father was four times of his son. Ten years hence the age of the father will be twice that of his son. The present ages of father & son are?

    asked by Ana
  91. Math

    The perimeter of a rectangular field is 140m. If the length of the field is increased by 2m and its breadth decreased by 3m,the area is decreased by 66sq.m. find the length & breadth of the field.

    asked by Dy
  92. Physics

    The temperature of the Sun’s surface (the so-called photosphere) is about 5500 C. Assume that the Sun’s surface is pretty close to a perfect black-body emitter. (a) At what wavelength does the peak intensity of Sun’s radiation lie? (b) Estimate the

    asked by Dan
  93. science

    A librarian lifts a box of books that weighs 93N a distance of 1.5 m. How much work does he do?

    asked by Anonymous
  94. Chemistry

    In an aqueous solution containing a mixture of Zn2+and Mg2+, how would you determine their contents by means of EDTA titration?

    asked by Silvia
  95. Math

    2,48 >2,4 _ 1>2,463

    asked by Lili
  96. computer

    Write an algorithm to enter marks of three subject for 100 students and find average and percentage if age is greater than 20 and less than 25

    asked by shahab
  97. math

    How do you find the function rule of x , and y, if you have both negative and positive integers.

    asked by Raven
  98. Physics

    Two spherical objects have masses of 3.5 x 10^7 kg and 6.5 x 10^9 kg. Their centers are separated by a distance of 125000 m. Find the gravitational attraction between them.

    asked by Student
  99. Math

    An automobile assembly runs for 9 3/4 hours each day. Workers work 3/4 hours shifts. How many shifts are in each day? i put 9 3/4 divided by 3/4. But that's a decimal then i tried 3/4 divided by 3/4 but thats worse. Help me please.

    asked by JadaBrooks
  100. computer science

    In a mobile phone network, how many times as strong would a signal be expected to be at 500 m from a base station, compared with at 250 m? Choose the nearest value from the list below.

    asked by yomi
  101. Calculus

    Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim (tan(7x))^x x~>0

    asked by Po
  102. Stats

    4 teachers selected from 13 parents and 5 teachers

    asked by Chris
  103. Chemistry

    What is the morality of a solution prepared by dissolving 10.60g of sodium trioxocarbonate (v) in enough distilled water to obtain 250.0 ml of a solution?

    asked by Charles
  104. English

    1. He has written this novel in easy English. (active) 2. This novel is written in easy English. (passive) 3. This novel has been written in easy English.(passive) 4. He has lost his pen.(active) 5. His pen has been lost by him.(passive) 6. His pen is

    asked by rfvv
  105. Trig

    What are the focus and directrix of the parabola represented by the equation:8(y-6)=(x+2)squared?

    asked by Emily
  106. science

    If a penny prior to 1982 weighted 3.1 grams and a current one weighs 2.5 grams how many pennies weighing 3.1 and 2.5 will I need in a combination of ten in total to have 25 grams??

    asked by Mary
  107. Mathss

    Calculate the area of the following triangles, giving your answers to 2 decimal places: (a) The right-angled triangle with sides a=16, b=63, and c=65. (b) The triangle with angle α = 40° and adjacent sides b=10 and c=20.

    asked by Daniel
  108. math

    Dina can make six bracelets in an hour. At the same rate, how many bracelets could she make in each allotted time listed in the table? Separate each answer with a comma.

    asked by zoe
  109. Physics

    Is it true that with buoyancy, the weight of the displaced water equals the weight of the complete object, even if only a part of the object is submerged? If so, why, since the weight of a larger object would be greater than that of a smaller one?

    asked by Anonymous
  110. Mathematics

    France is twice as old as his brother Emma.the sum of their age is less than their father by 12 years.if the father is 30 old is Emma

    asked by Asam
  111. AP Chem

    Determine the amount of a precipitate produced when 10mL of a 0.1M silver nitrate solution is mixed with 10mL of a 0.1M calcium chloride solution.

    asked by David W.
  112. Physics

    A car travels at an average speed of 100k-m/hr what distance does it cover in 5min.hint speed=distance/time

    asked by Kissless
  113. computer science

    A GPS satellite develops a fault whereby it moves into an orbit 19 500 km above the Earth’s surface and also emits a weak signal whose power is only 24 W. What will be the power per square metre of the signal received on the Earth’s surface? Choose the

    asked by yomi
  114. Motion

    A body weighing 150 N, moves with simple harmonic motion. The velocity and acceleration of the body when it is 200 mm from the centre of oscillation, are 5 m/s and 20 m/s2 respectively.Determine (a) amplitude of motion ,no. of vibrations per minute,

    asked by Abdu
  115. algebra

    How do I work out what the x and y equal in this equation: 4 over x plus 5 over y equals 21

    asked by Teresa
  116. English

    1. He wrote this novel last year. => This novel was written last year. 2. He has written this novel in easy English. => This novel is written in easy English. 3. He lost two pens last week. => Two pens were lost last week. 4. He has lost two pens .

    asked by rfvv
  117. Math, Surds

    The area of a square vegetable guarden is 60m^2. a) What is the exact length of each side of the garden? b) If a fence of a chicken wire is to be constructed around the vegetable garden, what length (to the nearest meter) of chicken wire is needed. It

    asked by Matt
  118. science

    a cylinder filled with hydrogen gas at 20 degree atmosphere can with hold 10litres of water .the spherical balloons are to be filled with hydrogen gas such that the radius of each balloon is 5 centimeter .how many balloon can be filled with hydrogen gas

    asked by aanya
  119. chemistry

    What volume of alcohol would you use if you needed 25.0 g? Density is 0.7855 g/ml at 20°C

    asked by Jayel
  120. maths

    Find a fraction which reduce to 2/3 if the numerator and the denominator are each increased by 1 and reduce to 3/5 if the numerator and the denominator are each reduced by 2

    asked by madhan
  121. Chemistry

    How much calories does it take to raise the temperature of 225 g of H2O from 25 °C to 100 °C. (Specific heat of water 4.182 J/(g* °C)

    asked by Turtel
  122. Chemistry 20

    a source of hydrogen is an important issue of hydrogen fuel cells are going to become useful in automobiles. What important perspective is missing?

    asked by David
  123. Math

    If the roots of the quadratic equation ax^2+bx+c=0 are in the ratio r:1 prove that acr^2+(2ac_b^2)r+ac=0

    asked by Shaima
  124. algebra

    It took Joe 1 1/2 hours to walk to the mall. James did it in 1/5 of the time it took Joe. How long did James take?

    asked by Anonymous
  125. Physics

    A 51-kg vampire and 139-kg werewolf clash during the Feat of Strength part of the annual celebration of Festivus. The werewolf velocity just before the clash is 6 m/s and is directed upwards, while the vampire velocity at the moment of the collision is

    asked by Kevin Land
  126. Math algebra

    If two people working together can do a job in 4 hours how long will it take the slower person to do the same job if one of them is 3 times as fast as the other?

    asked by Dila
  127. Physics

    In a vertical lifting an object with mass of 2kg is lifted 1m above the ground. A work of 80J is done with a constant force. What is the acceleration of the object?

    asked by Anonymous
  128. maths

    Convert in improper fraction 6 5/12

    asked by Priya
  129. chem

    If 1.83 moles of an ideal gas has a pressure of 1.30 atm, and a volume of 29.85 L, what is the temperature of the sample in degrees Celsius?

    asked by neymar
  130. Math

    Two hot air balloons are in flight above a field. The first Balloon is 30 meters above the ground rising 25 meters per minute. The Second Balloon is 300 meters above the ground descending 20 meters per minute. When will the 2 balloons be at the same

    asked by jen
  131. Super teacher worksheet

    Liam bakes two doze thank giving cookie he put an equal number of cookiein three boxes how many cookie are in each box

    asked by Krih
  132. English

    Why are these quotes a metaphor. Quotes are from "shooting an elephant." They were watching me as they would watch a conjurer about to perform a trick. Standing in front of the unarmed native crowd seemingly the leading actor of the piece

    asked by Emma
  133. math-mechanics 1

    i solved a)u=2i and b)r=2t+1/2[-0.4(i) 0,2(j)] at c) i don t have idea how to solve At time t = 0, a small boat is at a buoy travelling due east with speed 2 ms−1 . The boat experiences a constant acceleration of (– 0.4i + 0.1j) ms−2 . The unit

    asked by Andrew
  134. Math

    56 decreased by twice Craig's savings

    asked by Anonymous
  135. Maths

    In our math class, we didn't really go through alot on The circle so I still have some problem about the question assigned to me : Two circle C1 and C2 have equations x^2 + y^2 +4x - 3 = 0 and 2x^2 + 2y^2 +4x -6y + 3 =0 respectively. Show that, for all

    asked by Pat
  136. Chemistry

    5g of salt are dissolved in 200g of water,what mass of solution is this?

    asked by Pine
  137. maths

    Using trigonometric ratios find the remaining side lengths and angle measurements to 2 decimal places each: (a) α = 35°, β = 90°, a = 30 (b) α = 90°, b = 7, c = 6 (c) a = 33, b = 56, c = 65

    asked by Jacob
  138. motion

    A ball of mass 1000g moving with 7m/s impinges another ball of twice its own mass and moving with 1/6th of its own velocity and moves in the opposite direction. If the coefficient of restitution is 0.75, calculate the velocities of the two balls after

    asked by aboddu
  139. Math

    Carl shaded in the multiplication table.the products in the row are all even.the ones digits in the products repeat 0,4,8,2,6.what row does carl shade

    asked by Addison
  140. Algegra

    I need help understanding this and possibly how to do it... For the equation Ax + By = C (where A, B, C are real numbers) what is the slope (in terms of the traditional y = mx+ b) and state any restrictions.

    asked by Help
  141. Science

    Go to the place where knowledge sleeps Follow the path that he left behind Where data are tested and facts win out Find what is labeled with a century less two Now name the phantom marked by cross and double lines

    asked by Massiz
  142. mathematics

    France is twice as old as his brother Emma.the sum of their age is less than their father by 12 years.if the father is 30 old is Emma

    asked by Asam
  143. Math

    From left to right the first three digits of a 4 digits number add up to 8 which digits could be in the ones place if the 4 digit number is divisible by 6

    asked by Jenny
  144. math

    What is the average rate of change of the function f(x)=20(1/4)^x from x = 1 to x = 2? Enter your answer as a decimal. Do not round.

    asked by Jay
  145. math

    area of a regular octagon of side 12.5

    asked by Anonymous
  146. EN110

    To practice your reading comprehension skills, remember all of the following EXCEPT:

    asked by Yolanda
  147. Maths

    in a fraction the numerator exceeds 3 denominator, find the village knowing that decreasing 6 both terms of the fraction you get a new fraction that exceeds 9/20

    asked by Waqar
  148. English

    1. Please be quiet and draw you attention to me. 2. Please be quiet and pay you attention to me. (Can we use 'pay' instead of 'draw'? Do you have some other similar verbs?)

    asked by rfvv
  149. very hard PHYSICS QUESTION

    Consider a solid ball of mass m = 50g and is placed on a long flat slope that makes an angle of 30° to the horizontal. The ball was initially at rest and was then released such that it rolled down the slope without slipping. With a detailed explanation of

    asked by Matthew
  150. math

    on the assumption that IQ's are normally distribited in the population with a mean of 100 and a standard deviation of 20 findbthe proportion of peoples IQ's. what is the probability that a score picked at random will lie above score of 135, lie below score

    asked by quennie
  151. Math

    The perimeter of the rectangle is 54 meters the lengthy of the rectangle is five less than three times with what is the lengthy of the rectangle

    asked by Genevive
  152. math

    (a) Differentiate (x^2 + 1)^4 (b) Hence find a primitive of 8x(x^2 + 1)^3 .

    asked by zee
  153. Math

    I need help

    asked by Jenny
  154. English

    You will see what kinds of things you can do in each city. ------------------------- Does 'see' mean 'understand' or 'take a look at with eyes' in this sentence?

    asked by rfvv
  155. computer science

    In a particular phase modulation system, each symbol is able to represent 4 bits. What sort of PSK is being used?

    asked by yomi
  156. Bsc

    we use HCL INSTEAD OF H2SO4 108Kg. HCL Qty?

    asked by sandeep
  157. math

    if m-1/m find m2-1/m2

    asked by KUKU
  158. general

    Describe the relationship between attachment, resilience and regulation

    asked by gorf
  159. Gauss-Jordan elimination

    [1 1 1|7] [1-1-1|1] [1-1-]|3]

    asked by Peter
  160. math

    what is 8/9 - 17/54

    asked by teresa
  161. dav chd

    Depress the quartic x^4 - 4x^3 + 2x^2 + 4x + 4 into w^4 - 4w^2 + 7

    asked by Anonymous
  162. maths

    i am more than 10+10 but less than 20+5.who i am?

    asked by Sriram
  163. maths

    a man is 24 yrs older than his son.after 10 yrs he wili be 3 times as old as his son. how old is the son?

    asked by julius
  164. maths

    in a two-digit number the tens-digit is 2 more than the units digit.if the digits are interchanged the sum of the new number and the original number is 88.what is the original number

    asked by tsundzu
  165. math

    according to arrow impossibility theorem ,it is possible for voting method to satisfy every fairness criteria that the texbook discussed?

    asked by laura
  166. English

    1. Korea drew the game against Japan. 2. Korea tied the game against Japan. 3. Korea and Japan drew in the game. 4. Korea and Japan tied in the game. 5. The game between Korea and Japan ended/finished in a draw. 6. The game between Korea and Japan

    asked by rfvv
  167. English

    1. Their mother dressed the children every morning. => The children were dressed every morning by their mother. 2. He had dressed himself in the latest fashion. => He was dressed in the latest fashion. ------------------------- active voice => passive

    asked by rfvv
  168. MATHS

    Find all possible solutions in the range 0°≤ x ≤ 180° of the following equations: (a) cos x = sqrt(2) / 2 (b) tan x = sqrt(3) / 3 (c) sin x = sin60° (d) cos x = -1/2 (e) sin x = -1/2

    asked by Joshua