1. physics

    if you have an element that starts out at 40g and has a half-life of 10 days, you keep it for 30 days- how much doe you end up with? .
  2. Chemistry

    How could I tell if an element is stable or unstable? One of the examples is 89/42 Mo The only rule I know entirely is that if the atomic number is greater then 83 then it is unstable. Thanks
  3. Math

    The table below shows the melting points of four elements. Which element has the highest melting point.
  4. Chemistry

    Which of the following elements is least likely to form a cation that will then form an ionic bond with an ion of a Group 7A element? S K Rb Fr
  5. Math

    In a HP 4th term is 1/11and 24th element is 3/23.find 7th and 19th term?
  6. Sequence and series

    If {gn} is a geometric sequenc with gn > 0 for all n is an element of natural number,then prove that {ln gn} is an arthnetic sequence
  7. psychology of Education

    How do a person become back? Or what is the main element disturbed in a person for him/her to be mad? And what causes madness.
  8. Chemistry

    At STP, a 7.49-gram sample of an element has a volume of 1.65 cubic centimeters. The sample is most likely (1) Ta (3) Te (2) Tc (4) Ti How do you get the answer?
  9. Biology

    what are the 4 major polymers and their functions? is the major element that makes up many of the biological chemicals, carbon?
  10. Chemistry

    The unit cell of KCl is 6.31 Å on an edge. Find the density of KCl if there is 4 atoms of each element.
  11. chemistry

    9.03 of Mg combine completely with 3.48g of N to form compound. what is the percent composition of each element in this compound?
  12. Chemsitry

    Q1. How to find ions of a particular element.. Tell me the methods or procedure to do so? Q2. What are X-rays? Q3. What do u mean by "Irridated with X-rays? Q4. What do u mean by "radiation"?
  13. chemistry

    29.0g Ag combine completely with 4.30g S to form a compound. what is the percent composition of each element in this compound
  14. Chemistry

    The element P (mass no.=39) and Q (mass no. =80) contain 20 and 45 neutrons respectively in their nucleus. Give their electron configuration separately
  15. Social studies 7 (Check My Answers PLZ)

    1. Which are functions of money? Select all that apply. (3 points) store of value •• producer of resources unit of account •• medium of exchange •• record of finances unit of output 2. What is the main advantage of using money instead of
  16. math

    9. If possible, change each comparison of red paint to white paint to a percent comparison. If it is not possible, explain why. a. The fraction of a mix that is red paint is b. The ratio of red to white paint in a different mix is 2 to 5. 10. If possible,
  17. english

    has characterization, conflict or theme been used in any of these sentences? 1. Look-what about the woman across the street? If her testimony don't prove it, then nothing does. 2. Gentlemen, they did take us out of the woman's room and we looked through
  18. spin of a electron

    I have to know the spin of a electron and what I have in my notes has me confused. 1. If the # of neutrons and # protons of a element are odd the element has a whole spin # (1, 2, 3) examples given: 2 H 11 B 14 N 17 O 33 S 35 Cl (I think those are mass
  19. English

    What do you suppose McPhee means by “the influence of Ernest Hemingway evidently extended to the Pentagon”? This is the context this question is referring to: And inevitably we have come to Ernest Hemingway and the tip of the iceberg—or, how to
  20. English

    I am trying to analyze Wendi Kaufman's "Helen on Eighty-Sixth Street." I do not understand what Vita's mother means when she says "Truth is beauty and beauty is truth..." Please explain the meaning of this quote.
  21. Calculus

    A man is 6ft tall and is walking at night straight toward a lighted street lamp at a rate of 5 ft/sec. If the lamp is 20 ft above the ground, find the rate at which the length of his shadow is changing.
  22. English

    Sorry, I forgot to include this part. Thank you very, very much. 1) Robinson defeats the mutineers and rescues the legitimate crew. At last, Robinson and the ship’s crew sail back to England. 2) After 28 years on the island and 35 years of total absence
  23. English Expression

    Welcome to Namsan Middle School in Seoul. There are 500 students and 20 teachers in the school. There are many classrooms, a music room and an art room. There is a library, too. 1) Where is Namsan Middle School? It is in Seoul. 2) How many students are
  24. Biology

    All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from
  25. Biology

    All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from
  26. history

    what event caused the greek city- states to put aside their differences.
  27. U.S history

    what are the powers of Maryland General Assembly and Baltimore city council.
  28. 6th grade geography

    What nfl team other that the cardinals will be returning to a city from whence they came
  29. Astronomy

    Why is the time at which leo transits the meridian different for mexico city and chicago?
  30. Social Studies

    Which Songhai city was the center of learning,trade and religion
  31. History

    The first transcontinental road in the United States ran from New York City to where?
  32. swo wg

    what is the city, located on the Conagree River, that is the capital of south carolina?
  33. ae(correct)

    Board of Education of Oklahoma City v. Dowell, could that be a student as the plantiff
  34. Social Studies

    In what city did Rosa Parks defy the rules of segregation?
  35. Reading

    what is description of an object a scientist might have discovered buried in the city of Pompeii
  36. unscramble

    If you rearrange the letters "CARNEF", you would have the name of? A) a dog B) a city C) a country D) a province
  37. Voabulary

    How can we hope to a city that is surrounded by such strong walls and has ample supplies of everything it needs?
  38. History

    What was George Washington Plunkitt’s position in the governance of New York City.
  39. history

    What city was the first and second continental congresses and the declaration of independence approved? Philadelphia
  40. World Geo

    Name the south American country with the capital city LA PAZ.
  41. geo again last 2

    1. The land of a typical city is distributed by... 2. Technology changed the workforce by...
  42. social studies

    Which iroquois nations lived the farthest from new york city?
  43. World geography

    This very southern city in Africa is in an area of moderate rainfall
  44. History

    What King's monument and tomb can be found in the city of Aachen at the Cathedral?
  45. social studies

    what group forms new york city's legislative branch?
  46. social studies

    which Iroquois nations lived the farthest from New York City?
  47. Science

    How would your life be affected if a magnetic-storm shut down electricity in your city?
  48. geography

    Ms. Sue the capital city is Quito, Ecuador. Is this right? If not can you give me a better map to look at???
  49. Geography

    explain way in which urban landscapes can modify city climates. please could someone help me with this question? thanks
  50. Social studies

    What are the possible problems that the city state of Sparta May have with all of their resources going towards the military?
  51. Civics

    1. Who has the power and the United States to declare war? A. President. B. the senate. C. Secretary of state. D. Congress . 2. Which of the following issues relates most to domestic policy? A. Education. B. treaties. C. War. D. Military. 3. Which of the
  52. Report on Middle Class Today!

    I got this assignment and I have to do it TODAY! Write an essay on the necessity of a content, hard-working, middle class to the maintenance of a democratic government. I really have no idea what to write and i need to have it done today. Can anyone please
  53. Social studies (Mr.Sue CHECK MY ANSWERS PLZ)

    1. Which are functions of money? Select all that apply. (3 points) store of value •• producer of resources unit of account •• medium of exchange •• record of finances unit of output 2. What is the main advantage of using money instead of
  54. Social Studies

    1.Mark the statement if it is a reason that Rome was a good site for a city. A. Rome was located on a large river.** B. Rome was built on seven hills, which offered natural protection from invaders. C. Rome had an ideal seaport.** D. The climate of Rome
  55. astronomy

    The peak luminosity of a white dwarf supernova is around 10^10LSun and it remains above 10^8LSun for about 150 days. In comparison, the luminosity of a bright Cepheid variable star is about 10000LSun.The Hubble Space Telescope is sensitive enough to make
  56. 3rd grade

    language & arts question Relationships Example: glance is to look as gasp is to sound glance is a type look and gasp is a type of sound _______________________________________ make a realtionship: 1. Shatter is to break a. talent is to crowd b. batter is
  57. Fallacy

    My assignment is to find fallacies in a newspaper editorial and a opinion magazine. I am having trouble understanding what a fallacy is. I know that it is a false or misleading argument. I am not understanding how to detect fallacy. Everything I read
  58. Math

    There are 18 animals in the barnyard. There are 50 legs. How many cows and how many chickens are there in the barnyard? Technically, I wonder if a chicken is an animal. And are chickens and cows the ONLY "animals" in the barnyard. If we assume a chicken is
  59. English

    I don't quite understand William Faulkner's Nobel Prize Acceptance Speech. I've looked it up in Google and can only find the actual speech, nothing about it.
  60. reading

    i need help on a project about ceres/demeter so could you please give me web site. i've checked google and .mlahanas.de/Greeks/Mythology/Demeter.html
  61. Us Goverment

    I need to know what the different Taxes are, what % of people have to pay serten taxes and about civil rights. if you know a website that can help i would be very grateful. i tryed google but all i get are tax formes. thanks.
  62. Sose

    I am researching fire ants for an assignment and need a map of where they were first introduced in Australia and where they have now spread in Australia. I have searched everything imaginable on google and found nothing. Can you please help me?
  63. Art PLZZZ CORRECT ME!!!!

    Blue mountains rise in the distance while a small cottage sits amidst rocks and trees. Blue and Green Landscape by Shi Jui The Walters Art Museum, Baltimore 1.This Chinese painting is composed tall cliffs in the background and a small building with trees
  64. physics

    why dose the blood of an injured deep-sea divers look greenish-black in underwater photographs taken with natural light, but red when flashbulbs are used?
  65. College Physics

    A 3.0 kg black is at reat on a horizontal floor. If you push horizontally on the 3.0 kg block with a force of 12.0 N, it just starts to move. What is the coefficient of static friction?
  66. English 10

    Which is an example of simile? A.“clouds they were grey” B. “how many black berries grew in the Blue Sea” C.“the number her killers had given was four” D.“blood ran like wine” HELP ME PLEASE AND CAN YOU EXPLAIN
  67. british literature

    in william blake's poem " the chimney sweeper," the metaphor"coffins of black represent (A) innocence (B)chimneya (C)daffodils (D)the tiger
  68. britsh literature

    in Williams Blake's poem the chimney sweeper the metaphor coffins of black represents? a) innocence b)chimneys c)daffodils d)the tiger
  69. Chemistry

    7.62g of Fe are allowed to react with 8.67g of S to form brown black iron(III) sulphide at high temp. what is the limiting reagent?
  70. school of business

    1.the committee consister of a businessman, a banker& lady lawer. 2.three people applied for the job, including two well-educated black woman.
  71. Chemistry

    The element iron (Fe) is 45.8% by mass of a mixture. Write both conversion ratios for the following mass percent values.
  72. Science

    I have a project which is to write elements of platinum and my problem is that i forgot the paper at school, so i want to know what could i write about this element.
  73. Educational Tech

    Which of the following elements of design is the only element that is not added to a design? 1) Typography 2) Shape 3) Color 4) Space
  74. Communcations

    Organization is an important element in the speech preparation process. What do you need to take in to consideration when organizing your speech material?
  75. Algebra 2

    A particular radioactive element has a half life of 10.0 days. How much is left after 30.0 days if the sample started with 345g?
  76. Chemistry

    A particular radioactive element has a half life of 10.0 days. How much is left after 30.0 days if the sample started with 345g?
  77. Chemistry

    i need some chemical properties of the element arsenic.i have looked online and havent found any i have also looked in my book.
  78. english

    Which element of a short story would be most important to a story about a mad scientist stealing a secret weapon?
  79. science

    I am a metal. I am a transition metal. I have the smallest atomic radius in my group. I have 6 valence electrons. What element am I?
  80. chemistry

    Determine the oxidation state for the SECOND element in each of the following: NaF _____ Could you give me the steps to determine the answer
  81. bio

    What is the difference between an atom and an element? What are atoms composed of? What is the significance of atomic number and mass number.
  82. science

    Go to www.webelements.com and click on neon (element # 10). You can read all about both physical and chemical properties of neon.
  83. 6th grade literature

    Please explain what does it mean to develop a basic literature element chart? Secondly, what are literary elements?
  84. Chemistry

    A radioactive element has a half-life of 6.41 days. What percent of the original sample will be left after 15.0 days?
  85. calculus

    for x is an element of [-11,11]the function defined by f(x)=x^7(x+3)^6. where does the function achieve its minimum?
  86. university of nigeria

    how do we apply the element and principles of design in design?
  87. Math

    Set A contains the element 1. What other whole numbers must be in set A for it to be closed under addition?
  88. chemistry

    How many moles of O2 are needed to form 3 moles of Al2O3 from the element
  89. English

    is point of view a literary element or literary technique?
  90. math

    Set A contains the element 1. What other whole numbers must be in set A for it to be closed under addition?
  91. science

    There are many tooth whitening products on the market from what I've seen. And also available in treatments from the dentist as my aunt is a dentist so I know. But I don't know why I haven't thought of this from day 1. I saw an ad recently for Listerine
  92. Nutriton

    I am wondering how would you do a slide show about the Nutritional Needs in Pregancy, infants teenagers, adults, and older adults. I am confused on what I need, I was thinking using the food needed along with the amount of calories for teen-older adults.
  93. probability

    Mendel found that flower color in certain pea plants obeyed the following scheme. Pure red crossed with pure white produces red. When pure red​ (RR) and pure white​ (rr) parents are​ crossed, the resulting Rr combination​ (one of
  94. Art

    When an idea presented in a way that is original, it is considered to be A. impressive B. aesthetically pleasing** C. expressive D. Creative Not sure but I think B?
  95. Art/history

    I can't seem to find what areas Alexander The Great conquered? And what the circumstances were for taking the throne?
  96. Ela

    could you give me an conclusion and introduction for ancient india clothing and art plz!!!!! plzplzplzplz!!!!!!!
  97. hum 101

    What are some examples of a situation that the strateigies used in "The Art of War by Sun Tzu be applied to?
  98. Art

    I need to interpret the meaning, mood, or idea communicated from the painting, The Second Chinese Horse by Lascaux. Help please.
  99. ECED

    How many digital cameras would be needed in the early childhood classroom for children's use in art projects? A. 1 B. 3 C. 5 D. 10
  100. 7th grade Lang. Art

    Meager is best defined as a) slight c) ample b) lavish d ancient Please help me thank you! :)