Popular questions and responses by Unknown
  1. Physics

    A car, in overtaking trailer, uniformly accelerated its speed from 40 kph to 90 kph in 8 seconds. Calculate the distance traveled during the period of acceleration.

    asked on August 29, 2016
  2. history

    Jericho's status as the first city with a wall indicates that: A. It was the first city built during the old stone age. B. It was the first time concrete was used as a building material. C. It had a government that could organize construction projects. D.

    asked on August 11, 2020
  3. Physics

    A 0.35 m2 coil with 50 turns rotates at 5 radians per sec2 in a magnetic field of 0.6 Tesla. What is the value of the rms current in the coil if the coil has the resistance of 3.3 Ù? Can you also show me how you got the answer? Thanks so much

    asked on January 29, 2013
  4. math

    For how many positive integer values of n is 3^n a factor of $15 factorial (15!)?

    asked on May 23, 2018
  5. physics

    A 0.2 kg conductor of length 0.8 m carries 2 ampere current to the right in a magnetic field. What is the magnitude and the direction of the magnetic field acting on the conductor if the net force on the rod is zero? (Assume that the rod is hung by two

    asked on June 12, 2011
  6. chemisty

    Calculate the density of oxygen,O2 , under each of the following conditions: 1- STP 2- 1.00 atm and 35.0 C

    asked on October 8, 2008
  7. Chemistry

    For the reaction CH3COOH- CH3COO + H+, which of the following statements is true? CH3COO- is an Arrhenius base. CH3COO- is a conjugate CH3COOH- is a Brønsted-Lowry acid.

    asked on May 12, 2017
  8. Environmental Studies

    If you could drop Mount Everest (height: 8848 m) to the bottom of an ocean trench, would its summit reach the level of the ocean's abyssal plains?

    asked on February 1, 2017
  9. math

    1. If the legs of a right triangle have length 6 inches and 8 inches, what is the length of the hypotenuse in inches? (1 point) 11 13 10 16

    asked on November 12, 2015
  10. World history; Check:P

    1.What was the significance of the Twelve Tables? The Twelve Tables were significant because they were an early example of written law displayed publicly for all who could read them. They were later used as the laws for Rome. "The Twelve Tables established

    asked on February 12, 2013
  11. math

    Jan says if you double each of the dimensions of a rectangular box, it will take twice as much wrapping paper to wrap it. How do you respond?

    asked on October 28, 2011
  12. Geometry; Check answers?

    For each graph, find (a)AB to the nearest tenth and (b)the coordinates of the midpoint of AB. 1. Coordinates are A(-9, -6) B(6,6) D=19.2 Midpoint=(1.5,-6) 2.A(-2,-2) B(8,-6) D=10.77 midpoint= (3,-4) 3. A(0,3) B(-2,-2) D=5.4 Midpoint= (-1,0.5)

    asked on August 20, 2013
  13. Math

    There were 35 gallons of water in a tank and 4.5 gallons of water in a pail. An equal amount of water was poured into the tank and the pail. The ratio of the water in the tank to that pail became 7:2. a. how much water was in the pail at the end? b.how

    asked on August 18, 2015
  14. Math

    Syrus is buying a tent with dimensions shown below the volume inside the tent is 36feet power 3 syrus isn’t sure if the tent will be tall enough for him to sit up inside

    asked on April 29, 2020
  15. Health Health Health

    1. Which one of the activities would most likely be included in Healthy People 2020 goals? (1 point) A. Assist families in getting low-cost housing within the city that is known for high pollution levels. **** B. Help doctors to move their offices out of a

    asked on February 12, 2018
  16. math

    Q: Why didn't the quarter roll down the hill with the nickel?

    asked on May 28, 2019
  17. Science

    Determine the frequency of a microwave 6.0 cm in length.( A microwave is an electromagnetic wave.It travels through space at a speed of 3.0 x 10 ^8 m/s)

    asked on October 31, 2013
  18. Math

    A town records the amount of rainfall each year in October. The median and mean October rainfall for the past 60 years is shown. Which could be the graph of this rainfall data? Median: 2.62 inches Mean: 2.61 inches theres a picture that's with this

    asked on May 2, 2019
  19. Algebra

    Nine more than the quotient of two and a number x.

    asked on October 24, 2018
  20. World History

    Which were characteristics of Alexander the Great's empire? Select all that apply. A. Alexandria, Egypt became a center for learning. B. Trade in Africa, Europe, and Asia declined. C. Greece became isolated from others ideas. D. The size of Greece's empire

    asked on September 25, 2018
  21. Health and Physical Education

    1. The passing traits from parents to their children is a biological process called ______. A. Environment B. Gender C. Values D. Heredity **** 2. A ______________ is something a person works hard to accomplish. A. Consequence B. Decision C. Goal **** D.

    asked on February 12, 2018
  22. Edtech

    what do you do about cyberbullying if the first adult you tell doesn't take you seriously A.Ignore it B.Tell the adult over and over again C.Tell the bully that you will tell his or her parents D.Tell another trusted adult

    asked on January 6, 2017
  23. Grammar

    If as writing Spanish Conquistadors, would it have to be capitalized? how about European Explorers?

    asked on September 24, 2013
  24. physics

    In the double-slit experiment, consider the point at the middle of the final (detector) screen which is equidistant from the two slits. Suppose the intensity at that point is when either slit is open. Now for each of the three cases (a) bullet (b) wave (c)

    asked on February 12, 2013
  25. English; Help/Check.

    Check, Please? Select the one that is a Not a sentence fragment. A. Asking the interviewer how often he would have to work on weekends. B. To apply for a job at the new store in the mall. C. Shaking his new boss's hand, Tony knew he would like working

    asked on February 6, 2013
  26. mathematics

    A cylindrical gasoline can is 18 inches across and 20 inches tall. which expression represents the approximate volume in cubic inches ? 1) (3.14)(9)2(20) 2) (3.14)(9)(20)2 3) (3.14)(18)(20) 4) (3.14)(18)2(20) 5) (3.14)(36)2(20)

    asked on August 29, 2011
  27. social studies

    In which way was mali different from axum a- mali was influenced by christianity b- mali became primarily a muslim culture c- mali relied on trade across the indian ocean d- mali’s wealth was evident in their construction of stelae

    asked on November 16, 2018
  28. math

    1. What is the correct classification for the triangle shown below? A triangle has two angles measuring 68 degrees and 22 degrees. (1 point) acute, scalene acute, isosceles --- right, scalene obtuse, scalene 2. What is the value of x in the triangle? A

    asked on March 1, 2018
  29. Even more health...

    1. The health continuum is a representation of where your current health says falls--somewhere between illness and wellness. Identify the health status that might cause a decline in health and move you toward a state of illness. A. Enthusiasm for life B.

    asked on February 12, 2018
  30. Science

    A scientist from the United States conducts an experiment using miles per hour to measure speed. Why might this be confusing for scientists in other countries? A) Scientists in other countries don't usually perform experiments involving speed. B)

    asked on February 6, 2018
  31. social studies { somebody please help me please

    What countries were members of the central powers in WW1? A. Austria-Hungary, Germany, Turkey*** B. France, , Germany, Russia C. France, Great-Britain, Russia D. Great-Britain, United States, Turkey 2. What caused the U.S to enter WW1 after 3years of

    asked on April 5, 2016
  32. L.A

    both "the road not taken" and "o captain! my captain! are analogies. write a paragraph comparing the authors use of analogy. what is analogy? how does frost use analogy in his poem? how does whitman use analogy in his poem? why has each of these analogy

    asked on March 6, 2015
  33. physics

    The U.S. five-cent coin, the nickel, has a mass of 5.1 g, a volume of 0.719 cm3, and a total surface area of 8.54 cm2. Assuming that a nickel is an ideal radiator, how much radiant energy per second comes from the nickel, if it is at 24∘C?

    asked on January 28, 2015
  34. Physical Science

    An astronaut in a spacesuit has a mass of 100 kilograms. What is the weight of this astronaut on the surface of the Moon where the strength of gravity is approximately 1/6 that of Earth?

    asked on October 15, 2013
  35. Chemistry;HELP

    Volume Problems Answer the following questions. Scan and upload your questions and answers to your student section labeled Volume Volume Problems. Identify the following chemical equations by type. 1. If an electric discharge produces 500 cm3 of ozone

    asked on August 21, 2013
  36. physics

    Marks: 2 The magnetic field of the loop increases from 0.0 Tesla to 0.2 Tesla in 0.4 seconds. The cross sectional area of the loop is 0.6 m2. What is the average current induced in the loop if the coil has a resistance of 1.5 Ω? Choose one answer. a. 0.1

    asked on June 9, 2011
  37. physics help!

    An electron enters the region of a uniform electric field between two oppositely charged parallel plates as shown, with an initial velocity of 3 x 106 m/s. The electric field between the plates is measured to be E = 200N/C. The horizontal length of the

    asked on May 12, 2011
  38. physics

    What are the first three harmonics of a note produced on a 31.0 cm long violin string if waves on this string have a speed of 277.0 m/s? Hz Hz Hz

    asked on March 12, 2011
  39. More History Check

    1.)Which of the following statements is true? =a)Although they differed in form, all State constitutions embodied the same basic ideals. b)Most of the early State constitutions gave great power to the executive branch. c)Some State constitutions were

    asked on June 25, 2010
  40. Reading

    TO BUILD A FIRE Jack London Day had broken cold and gray, exceedingly cold and gray, when the man turned aside from the main Yukon trail and climbed the high earthbank, where a dim and little-traveled trail led eastward through the fat spruce timberland.

    asked on June 7, 2010
  41. Mathematics

    What value of x will give the minimum value for 9x^2 + 18x + 7?

    asked on June 28, 2020
  42. Math

    A right pyramid has a square base of sides 10cm each and a slant height of 15cm . Draw a net of the pyramid and label its dimensions

    asked on November 7, 2018
  43. History

    Compare and contrast the treatment of different religions by rulers of the arab empire

    asked on October 31, 2018
  44. algebra 1

    Three minus the product of two and a number x.

    asked on October 24, 2018
  45. 7th grade Math

    an online retailer charges $6.99 puls $0.55 per pound to ship electronics purchases. How many pounds is a DVD player for which the shipping charge is $11.94 plz help me

    asked on November 9, 2017
  46. Geometry

    Write a two-column proof. Given: 7y=8x-14; y=6 Prove: x=7 I need help making a two-column proof with the statements and the reasons, please! Thank you! ( This is what I have so far) Statements | Reasons 1. 7y=8x-14;y=6 | Given 2. 7(6)=8x-14 | Substitution

    asked on September 7, 2016
  47. Spanish B

    What is one of the main factors attributed to Panama's booming economy? A)The control of Los Estados Unidos over the Panama Canal. B)Panama's sole control over the Panama Canal. C)France's abandonment of the Panama Canal project. D)Joint control of the

    asked on May 17, 2016
  48. science

    How are Earth and Venus similar ? How are they different? give 2 similarities and 2 difference thanks

    asked on March 15, 2016
  49. math

    verify for sqrt(1-cosx)= sin/sqrt(1+cosx). I multiplied the right side by sqrt(1-cosx) and got sqrt(1-cosx)= sin*sqrt(1-cosx), but I don't know what to do with the sin.

    asked on March 5, 2016
  50. Math

    A class went on a field trip to see a play. Adult tickets cost $18 each and student tickets cost $12 each. There were 10 more students than adults that went to the play. If the trip cost $240 in all, how many adults and students went to see the play? Write

    asked on February 29, 2016
  51. Science >.<

    if a wave is traveling at 60cm/second and has a wavelength of 15cm what is the frequency? Please explaine

    asked on October 31, 2013
  52. Physic

    A ball is thrown horizontally from a cliff at a speed of 15 m/s and strikes the ground 45 meters from the base of the cliff. How high was the cliff (rounded to the nearest meter)

    asked on February 27, 2013
  53. World history; Check:P

    How's this so far? :) I kind of tried my best. Indo - Europeans Essay How did the religion of the Hebrews differ from many of the religions of their neighbors? Hebrews were monotheists they prayed to only one god, unlike their neighbors. Their neighbors

    asked on February 14, 2013
  54. physics

    (a) A vertically polarized photon goes through two polarizing filters, the first of which is vertically aligned and the second at degrees. What is the probability that the photon is transmitted through both filters? (b) Now, you are allowed to place a

    asked on February 12, 2013
  55. English; Help/Check.

    What is the main idea of 'The Raven' by Edgar Allan Poe? The raven haunts the man while being awfully depressed by his long lost love.

    asked on January 28, 2013
  56. Physics

    A 0.35 m2 coil with 50 turns rotates at 5 radians per sec2 in a magnetic field of 0.6 Tesla. What is the value of the rms current in the coil if the coil has the resistance of 3.3 Ù? Have no idea how to do this...

    asked on January 27, 2013
  57. Spanish help!

    Complete with ser. Puerto Rico y la Republica Dominicana _____ dos islas en el mar Caribe.

    asked on October 27, 2012
  58. physics

    The aircraft has a take-off mass of 320 000 kg. Each of the 4 engines can produce a maximum force of 240 kN. calculate the maximum acceleration of the aircraft. the answer is 3m/s^2 but i don't know how to get it.

    asked on October 12, 2012
  59. All

    Any websites for study guides for drivers ed?

    asked on September 21, 2012
  60. Chemistry

    Write the net ionic equation for the reaction that takes place between a solution of magnesium chloride and a solution of sodium hydroxide.

    asked on June 26, 2012
  61. math

    A box holds 2 blue marbles and 6 red marbles. How many and what color marbles could you remove from the bag to make the probability of picking red 1/2?

    asked on February 24, 2012
  62. Chemistry

    What is the mass of 65.0mL of ethanol? the density of ethanol at room temperature=0.789g/mL

    asked on January 20, 2012
  63. chemistry

    Imagine that you have a 5.00L gas tank and a 3.50L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145atm , to what

    asked on November 18, 2011
  64. math

    a figure skater must trace a figure eight on the ice that consists of two perfect circles, each with radius 11 feet. How far does the skater go one time around the figure eight?

    asked on October 28, 2011
  65. physics

    Marks: 4 A circular plate of radius 0.5 m is placed perpendicular to the direction of the magnetic field of 0.5 Tesla. What is the change of flux in the plate if it rotates and its plane becomes parallel to the direction of the magnetic field?

    asked on June 12, 2011
  66. physics

    Two point masses are located a distance, D, apart. The gravitational force of attraction between them can be quadrupled by changing the distance to

    asked on November 7, 2010
  67. essential Mathematics

    if on the first of january a savings account has a balance of $3,200, what amount will be there in this account after three years if the bank gives 6% per year interest compounded quarterly? (assume that there are no deposits or withdraws of money during

    asked on May 28, 2010
  68. Physics

    A 2.2 m-long string is fixed at both ends and tightened until the wave speed is 50 m/s.What is the frequency of the standing wave shown in the figure? picture has 6 waves

    asked on November 8, 2009
  69. chemistry

    consider the reaction 2HgCl2 + C2O4-2 ---> 2Cl2-1 + 2CO2 + Hg2Cl2 The initial rate of this reaction was determined for several concentrations of HgCl2 and C2O4-2 and the following rate data was obtained. TRIAL (1) [HgCl2](M)= .105 [C2O4-2](M)= .15 RATE=

    asked on March 25, 2007
  70. Math

    Suppose your boss owes you $800, plus a commission of 2.5% on a sale of $1,000. How much does your boss owe you? $1,250 $845 $825 $1,050

    asked on December 20, 2019
  71. Geography

    How were ideas as well as goods spread along the Silk Road? A-books were sold along with other goods B-Libraries were established along the Silk Road C-New ideas were needed to make travel possible D-Traders shared ideas as they traveled

    asked on February 11, 2019
  72. Geometry

    Describe the single transformatthat has the same effect as reflecting across the line x = 1 followed by a reflection across the line x = 5

    asked on December 19, 2018
  73. Social studies

    In this discussion, you will discuss Chief Joseph’s speech. Post a detailed response to the discussion prompt. Then comment on at least two other posts. To understand how you will be graded for this assignment, read the Discussion Guidelines and Rubric.

    asked on November 20, 2018
  74. World History

    Which was the most important lasting impact of Alexander’s conquests? A. the spread of Greek ideas around the ancient world B. the creation of a new empire C. the division of the empire among his generals D. Macedonian domination of Greece

    asked on September 25, 2018
  75. Astronomy

    What is the wavelength of a radio photon from an "AM" radio station that broadcasts at 1160 kilohertz?What is its energy in joules

    asked on July 15, 2018
  76. Math

    Which are the solutions to 8cos^2 theta-3cos theta=0, 0 degrees is less than or equal to theta which is less than or equal to 180 degrees ? Select all that apply a)0.0 degrees b)22.0 degrees c)52.0 degrees** d)68.0 degrees e)90.0 degrees** I’m pretty

    asked on May 27, 2018
  77. Chemistry

    Which of the following distinguishes a nuclear reaction from a chemical reaction? Mass is conserved. It involves atoms. There is an exchange of electrons.

    asked on May 10, 2017
  78. Mathematics

    You live 2 3/4 miles from school. In the morning, you walk 1/3 mile directly toward school to take the bus. After school, you walk home the same distance when the bus drops you off. How many miles do you ride the bus to and from school each day?I dunno

    asked on April 23, 2017
  79. math

    If 8/14=4/d, what is the value of d?

    asked on February 21, 2017
  80. Geometry

    List the sides of the triangle in order from longest to shortest. Angle D is 86 degrees Angle F is 50 degrees Angle E is 44 degrees *xy=segment* A) EF, FD, DE B) FD, DE, EF C) EF, DE, FD D) DE, FD, EF My answer: I think it would be B but I'm not sure. If

    asked on December 7, 2016
  81. Geometry

    Solve for X, given BD=3x+5 and AE=4x+20 B is the midpoint of segment AC and D is the midpoint of segment CE. Solve for x, given BD=3x+5 and AE=4x+20

    asked on December 7, 2016
  82. Math grade 10

    Give quadrilateral EFGH ,with coordinates E(1,4), F(1,2), G(5,0) and H(3,4); verify that EG bisects FH

    asked on December 4, 2016
  83. Geometry

    The midpoint of uv is (5 -11). the coordinates of one endpoint are u(3 5) find the coordinates of endpoint v. I really need help asap! i have to put this in today.. Please and thank you!

    asked on October 12, 2016
  84. Social studies

    The first amendment protects which rights? Select all that apply. The right to own a gun? The right to a fair trial?** The right to practice a religion(or not)? The right to criticize the government?** The right of owning property?

    asked on October 12, 2016
  85. math

    1. what is the term for data that are grouped closely together? a. outlier b. liner c. positive d. clustering 2. what association would you expect if you was graphing height and weight ? a. position b. nonlinear c. negative d. none of these 3. what

    asked on March 14, 2016
  86. science

    Is a bluegill both a decomposer and consumer?

    asked on January 11, 2014
  87. Physical Science ASAP

    1. true or false? a well-oiled machine has no friction. explain your answer. 2. True or false? Friction makes energy vanish. Explain your answer. 3. True of false? Electronic machines with no moving parts experience friction and get hot because electricity

    asked on October 23, 2013
  88. CHEMISTRY!! D:

    1. A sample of gas under a pressure of 622 kPa has a volume of 233 cm3. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure? 2. The pressure exerted by a gas is 2.0 atm while it has

    asked on September 3, 2013
  89. Chemistry

    Complete and balance the molecular equation, including phases, for the reaction of aqueous copper(II) chloride, CuCl2, and aqueous potassium phosphate, K3PO4. Balance the net ionic equation, including phases, for this reaction.

    asked on April 7, 2013
  90. Physics

    We have a qubit in the state |ψ>= √3/2 |0>+ 1/2 |1>, which we want to measure in the {Cos θ |0> + Sin θ |1>, Sin θ |0> - Cos θ |1>} basis. In order for the two possible outcomes to be equiprobable, what should be the value of θ in degrees? (Answer

    asked on February 14, 2013
  91. World history; Check:P

    Renaissance Assignment What was the attitude of Church leaders and the wealthy toward the arts? Why? The attitude of the church was encouraging and loved the art that was being done because they were willing to spend tons of money for art. They became

    asked on February 13, 2013
  92. World history; Check:P

    Medieval Society Assignment What were three main causes of the need to reform the Church? The three main causes were: • Many village priests married and had families. Such marriages were against Church rulings. • Bishops sold positions in the Church, a

    asked on February 12, 2013
  93. Chemistry

    You are preparing 500 mL of a 0.300 M acetate buffer at pH 4.60 using only sodium acetate, 3.00 M HCl, 3.00 M NaOH, and water. Calculate the quantities needed for each of the following steps in the buffer preparation. 1. Add sodium acetate to ~400 mL of

    asked on February 28, 2012
  94. chemistry

    Consider 4.00L of a gas at 365mmHg and 20*C. If the container is compressed to 2.80L and the temperature is increased to 35*C, what is the new pressure,P2 , inside the container? Assume no change in the amount of gas inside the cylinder

    asked on November 18, 2011
  95. Physics

    An airplane lands and starts down the runway at a southwest velocity of 43 m/s. What constant acceleration allows it to come to a stop in 1.1 km?

    asked on September 10, 2011
  96. math

    Brett took a loan of $25,000 at a simple interest rate of 8%. After 4 years, what is the interest he had to pay?

    asked on December 17, 2010
  97. Reading (literally)

    TO BUILD A FIRE Jack London Day had broken cold and gray, exceedingly cold and gray, when the man turned aside from the main Yukon trail and climbed the high earthbank, where a dim and little-traveled trail led eastward through the fat spruce timberland.

    asked on June 7, 2010
  98. Physics

    Sound is detected when a sound wave causes the eardrum to vibrate. Typically, the diameter of the eardrum is about 8.4 mm in humans. How much energy is delivered to your eardrum each second when someone whispers 20dB a secret in your ear?

    asked on November 8, 2009
  99. chemistry

    Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm , to what

    asked on October 8, 2008
  100. anatomy

    When comparing Tay-Sachs disease and Duchenne's muscular dystrophy which of the following do both have in common? A.they both involve malfunction of the nervous system B.they both involve mutations in which fat replaces normal tissue C.they both are

    asked on September 30, 2008


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