lesley

Most popular questions and responses by lesley
  1. Chemistry

    A 108g piece of unknown metal is heated to 100 degrees C in boiling water. The heated sample of metal is then dropped into 50ml of H20, which is initially at 23.0 degrees C. After a few minutes the temp. of water raises to 37.5 degrees C. What is the

    asked on May 14, 2011
  2. Math

    The average monthly mortgage payment including principal and interest is $982 in the United States. If the standard deviation is approximately $180 and the mortgage payments are approximately normally distributed, find the probability that a randomly

    asked on April 10, 2013
  3. math-geometry

    the sunshine orange juice company wants its product in a one quart container(1 quart=107.75 cubic inches). the manufacturer for their containers makes cylindrical cans that have a base that is 5 inches in diameter. what will be the height of the one quart

    asked on May 20, 2015
  4. math

    A study conducted by a TV station showed the number of televisions per household and the corresponding probabilities for ecach. Find the mean, variance, and standard deviation. (in table) Number of televisions 1 2 3 4 Probability P(X) 0.32 0.51 0.12 0.05

    asked on April 10, 2013
  5. Physics

    A rock is dropped from a height of 2.7 m. How fast is it going when it hits the ground?

    asked on February 27, 2011
  6. English: clauses

    we have to to identify the dependent clause in this sentance and then tell wether the clause is an adverb, adjective, or noun clause. "Who knows what the future will bring?" In this sentance i know where the dependent clause starts but other than that i'm

    asked on February 19, 2007
  7. Physics

    An arrow is fired vertically upwards by a bow and reaches an altitude of 134 m. Find the initial speed of the arrow on the ground level.

    asked on February 27, 2011
  8. Pre calc

    A cylinder shaped can needs to be constructed to hold 1000 cubic centimeters of soup. The material for the sides of the can costs 0.1 cents per square centimeter. The material for the top is.2 and the bottom is .3 cents per square centimeter. Find the

    asked on September 25, 2017
  9. Chemistry

    Writing the net ionic equation for sodium fluoride+hydrochloride, magnesium iodide + lead (II) acetate sliver (I) acetate + potassium iodide nickel (II) sulfate + barium chloride barium acetate + ammonium sulfate barium hydroxide +aluminum bromide zinc

    asked on June 10, 2016
  10. Physics

    A student uses a spring to launch a marble vertically in the air. The mass of the marble is 0.002 kg and when the spring is stretched 0.05 m it exerts a force of 10 N. What is the maximum height the marble can reach?

    asked on February 27, 2011
  11. Physics

    How much work is needed to lift a 3 kg mass a distance of 0.75 m?

    asked on February 27, 2011
  12. science: cells

    1~ What do red blood cells do and is there anything significantly different about them from other types of cells? 2~ What are bone cells and is there anything significantly different about them from other types of cells? (I just need help for studying i

    asked on February 12, 2007
  13. Music/choir

    What do the following notes look like? quarter note ,half note,eighth note ,whole note also how many beats do they receive? http://www.musictheory.halifax.ns.ca/5durations2.html If a whole note receives 4 beats to a measure.... then you can easily figure

    asked on April 26, 2007
  14. math

    What is the conversion factor sequence for units from ft./sec. to km./hr.? Is (ft/sec) x (sec/min) x (min/hr) x (m/ft) x (km/m) correct?

    asked on August 30, 2011
  15. Science

    Which layers of the Earth can only be studied by indirect means? ( Layers being inner core, outer core, mantle, And Crust) inner core, outer core, mantle Yes, if you personally visited any but the crust you would be destroyed by the heat and pressure.

    asked on November 17, 2006
  16. Physics

    How much work is done in accelerating a 2000 kg car from rest to a speed of 30 m/s?

    asked on February 27, 2011
  17. Algebra two

    An empty 5-gal water jug weighs 0.75lb. With 3c of water inside, the jug weighs 2.25lb. Predict the weight of the jug with 5c of water inside

    asked on September 8, 2014
  18. trigonometry

    the length of a rectangle is 2cm longer than the width. if its length and width are both increased by 4cm, its area is increased by 72 cm^2. find the dimensions of the original rectangle.

    asked on October 10, 2011
  19. math

    Find b such that (8x+1/b)-2=x has a solution set given by {3}. b =

    asked on October 4, 2011
  20. Math

    Identify the group that does Not contain equivalent fractions, decimal and percent. a.1/20, 0.05,5% b.7/20,0.7,70% c.1/8, 0.125, 12.5%

    asked on March 2, 2011
  21. English

    Last night, I slept like a log. Should "I slept like a log" be A. I slept like a baby. B. I slept well. C. I slept as if there were no tomorrow.

    asked on September 1, 2011
  22. Physics

    A student uses a spring with a spring constant of 130 N/m in his projectile apparatus. When 56 J of potential energy is required to launch the projectile to a certain height, what is the compression in the spring?

    asked on February 27, 2011
  23. Physics

    A children’s roller coaster is released from the top of a track. If its maximum speed at ground level is 8 m/s, find the height it was released from.

    asked on February 27, 2011
  24. maths

    What is 174.36 rounded up to nearest tenth

    asked on September 18, 2010
  25. Math

    Eight oranges cost gh¢15.00. how much will twenty oranges cost?

    asked on May 10, 2018
  26. geometry - PLEASE ANSWER ASAP! thanks!

    the sunshine orange juice company wants its product in a one quart container(1 quart=107.75 cubic inches). the manufacturer for their containers makes cylindrical cans that have a base that is 5 inches in diameter. what will be the height of the one quart

    asked on May 20, 2015
  27. maths please help and explain

    A. 16p^2-4q^2/(6p^2-7pq+2q^2) *6p^2-13pq+6q^2/(4p^2-4pq-3q^2) B. a^2+a-2/(6a-12) / a+2/(a^2-3a+2) C.3/(x-3) -x^2/(6+x-x^2) -2/(x+2) D.x+1/(x^3-1) - 1/(x^2+x+1) Key * multiplication !

    asked on February 8, 2015
  28. Finite

    write an equation of a line containing the given point and perpendicular to the given line(4,7);4x+y=8

    asked on September 9, 2011
  29. biology

    Which one of these occurs durning the light reactions of photosynthesis? a. carbon dioxide fixation b. g3P production c. NADPH production d. reduction in carbon dioxide

    asked on March 25, 2009
  30. precalc

    Success in business depends on many factors. Buying habits of consumers, trends in fashion and taste, seasonal trends, the strength of the competition, and the condition of the national and international economies all affect the fortunes of a business. The

    asked on January 4, 2017
  31. trigonometry

    the length of a rectangle is 2cm longer than the width. if its length and width are both increased by 4cm, its area is increased by 72 cm^2. find the dimensions of the original rectangle.

    asked on October 10, 2011
  32. English

    Is there anyhong wrong with these two sentences? 1. Her sister and her are now employed at Beef Barn as cooks. 2. The mechanic told Bill and I that the car was not finished.

    asked on September 1, 2011
  33. Spanish

    I'm curious to know if i translated these two sentences right: 1.The stop sign is located at the intersection. ~I translated: La senal de parada esta queda al cruce de calles. 2.It is very dangerous to drive a truck across the narrow bridge. ~I translated:

    asked on January 6, 2010
  34. Quiz

    My first is in silver but not in gold a Stirling job so I’m told

    asked on September 5, 2018
  35. Math

    A number x is atleast 15

    asked on January 11, 2018
  36. college chemistry

    Predict two new ionic compounds that may form after you mix these sodium phosphate and calcium nitrate solutions. Write a balanced equation to show which ions would collide and what compound will form.

    asked on October 11, 2016
  37. american history

    In the southern campaign launched by British, Cornwallis lost a battle with the Americans under Nathaniel Greene at?

    asked on April 7, 2014
  38. english

    what does "His face masked his troubles. It was a face without effect, without emotion." mean?

    asked on September 19, 2013
  39. math

    Chester builds and collects models of boats and planes. He has 22 models all together chester has 8 more planes than he has boats. How many of each kind of model does he have?

    asked on October 15, 2012
  40. Physics

    How much work must be done to accelerate an 8x105 kg train: a) from 10 m/s to 15 m/s; b) from 15 m/s to 20 m/s; c) to a stop an initial speed of 20 m/s?

    asked on February 27, 2011
  41. Sleep/Dreams

    How does our mind make dreams when we sleep? There are several theories about what causes dreaming. One is discussed in this article: http://www.members.cox.net/dagershaw/lol/DreamsReveal.html I hope this helps. Thanks for asking.

    asked on November 28, 2006
  42. English

    Pronoun agreement: How do you know when to use who or whom? Who is a subject of a verb. Examples: Who let the dog out? Pat is the person who is always late. Whom is used as the object of a verb or a preposition. Examples: He asked, "For whom does the bell

    asked on October 21, 2006
  43. organic chemistry

    Is 4 ethyl-2,4 octadiene a correct name? How can i identify if it's incorrect or correct?

    asked on July 11, 2015
  44. maths please help

    Subtracting ,division and multiplication of fractions A. 16p^2-4q^2/(6p^2-7pq+2q^2) *6p^2-13pq+6q^2/(4p^2-4pq-3q^2) B. a^2+a-2/(6a-12) / a+2/(a^2-3a+2) C.3/(x-3) -x^2/(6+x-x^2) -2/(x+2) D.x+1/(x^3-1) - 1/(x^2+x+1) Key

    asked on February 7, 2015
  45. information technology (elphi)

    I need help with my PAT phase en I need to know what must go into the pat file and the whole layout of it

    asked on April 11, 2013
  46. physics ASAP please

    In a rugby match 3 players huddle around a fourth player and push him. If they push with the following forces, what is the resultant force on him? 160 N 125, 140 N 35, and 220 N 200

    asked on September 26, 2011
  47. Chemistry

    Convert 186,281 miles per second to feet per year.???

    asked on August 30, 2011
  48. Math

    -48, -12, -3 ... Find the next three terms of the sequence.

    asked on May 19, 2011
  49. 6th grade science

    What is the term for radiation beneath the frequency we can see?

    asked on April 14, 2010
  50. School Projects

    My son in grade 4 got zero for his project, "autobiography" What exactly are teachers wanting and is there a site that I can go to to show him some examples? Hes really upset and I don't know what the teachers wants!

    asked on February 6, 2009
  51. math

    How to you do the prime factorisation of 350 using exponets? Just break it down into smaller and smaller factors until are are prime. 350 = 50 * 7 = 10 * 5 * 7 = 5*2*5*7 = (5^2)*2*7 1000

    asked on January 16, 2007
  1. accounting

    $3,200,000

    posted on October 17, 2017
  2. Math Check Answers

    Number 1 is 2

    posted on December 18, 2016
  3. science

    I agree

    posted on December 17, 2016
  4. life orientation

    fundamental

    posted on May 10, 2016
  5. Social Studies

    1 is c

    posted on October 23, 2015
  6. Ife orientation

    the hazards that cause ill heath,crises and disasters

    posted on April 25, 2013
  7. Math

    find the sum or difference in simplest form 2/3+2/9=

    posted on November 15, 2011
  8. Math

    find the sum or difference in simplest form

    posted on November 15, 2011
  9. math

    i'm not sure, but i think all of them do except for the scalene triangle and maybe the rectangle.

    posted on January 6, 2010
  10. word unscramble

    pandingingfrenrit

    posted on November 17, 2008
  11. Biology

    wow. dis reli helped alot for my biology hw. i had those same ansers but i needed to make sure. TY so much. this was of great help otherwise i wouldve probally skipped da question.

    posted on October 26, 2008