Questions Asked on
March 4, 2014

  1. Chemistry Need Help!

    Okay, the reaction is this: Naphthalene + HNO3 ---> NitroNapthalene The limiting reagent is Naphthalene The excess is the nitric acid The equation is 1:1 balanced as far as I know 3 g of Nap used in the experiment x 1mol/128.17 g/mol = .023 mol Nap 12.69 g

    asked by ChrisZZ
  2. Math

    A wire to the top of a tower makes an angle of 52 with the le el ground. At a point 32 ft. Farther from the base of the toser and in líne with the base of the wire, the angle of elevation to the top of the toser is 21. What is the length of the tower.

    asked by Hannah
  3. pre calculus

    Jack invests $1000 at a certain annual interest rate, and he invests another $2000 at an annual rate that is one-half percent higher. If he receives a total of $190 interest in 1 year, at what rate is the $1000 invested?

    asked by Danielle
  4. pre calculus

    Candy and Tim share a paper route. It takes Candy 70 min to deliver all the papers, and it takes Tim 80 min. How long does it take the two when they work together?

    asked by Danielle
  5. english

    What is the verb and the noun, A house is built by wisdom and becomes strong through good sense

    asked by bulltough
  6. Physics

    The coefficient of static friction between the m = 3.20-kg crate and the 35.0° incline of the figure below is 0.260. What minimum force vector F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

    asked by James
  7. LITERACY

    Which type of citation would you use for a psychology paper?

    asked by Anonymous
  8. Intermediate Algebra

    One leg of a right triangle has a length of 5 m. The other sides have lengths that are consecutive integers. Find these lengths. The other leg is ____ m The length of the hypotenuse is ____ m

    asked by Spacegazing
  9. Chemistry

    A mixture of gases is made up 0.48 mol of Ar and 0.94 mol of N2 with a total pressure of 1.68 atm. What is the partial pressure of Ar?

    asked by Eddie
  10. Science

    A tug is capable of pulling a ship with a force of 100 KN. If two such tugs are pulling on one ship, they can produce any force ranging from a minimum of 0 KN to maximum of 200 KN. Give a detailed explanation of how this is possible. Use diagrams to

    asked by Sello
  11. physics

    11) Three point charges of magnitudes +6.0 mC, -7.0 mC, and -13 mC are placed on the x-axis at x = 0 cm, x = 40 cm, and x = 120 cm, respectively. What is the force on the -13 mC charge due to the other two charges? A) -0.55 N B) -0.79 N C) 0.55 N D) 0.79 N

    asked by sara
  12. math

    ʃ sin² cos² dx

    asked by zainab
  13. Intermediate Algebra

    One leg of a right triangle has a length of 5 m. The other sides have lengths that are consecutive integers. Find these lengths. The other leg is ____ m The length of the hypotenuse is ____ m Is my answer correct? The other leg is 12 m The hypotenuse is 13

    asked by Spacegazing
  14. Accounting

    For earnings management, is impairment of goodwill easier to manipulate than impairment of PPE?

    asked by SSSSSS
  15. art

    how do you mix colors with craions

    asked by cierra
  16. Maths

    A rectangular park is 45 m long and 30 m wide. A road 5 m wide is construced outside the park. Find the area of the road . The estimated cost of constructing the road is Rs 1,70,000 at Rs 200 per sq.m.Is it right?

    asked by Anonymous
  17. math

    Marty's rock shop has a stock of 360 shells. 80% of the shells are from florida. How many of the shells are from florida?

    asked by anonymus
  18. math

    Martys rock shop has a stock of 360 shells. 80% of the shells are from florida. How many of the shells are from florida?

    asked by Anonymous
  19. science

    which detail helps to predict stormy weather? a). Dewpoint: 57F./ 14c. b). Barometer:29.99 rising. c). Hi:65F, d).Heat index: NA. My answer is ( b )

    asked by Anonymous
  20. math

    The center pole of a tent is 8 feet long. the side of the tent is 12 feet long. If a right angle is formed where the center pole meets the ground, what is the measure of angle a.(there is a pic, the 8ft line is the center pole going down, this forms the

    asked by B8
  21. World History

    1.How did modern states emerge? 2.What challenges confronted the centralization of Muslim states during the 18th century? 3.How did the different Muslim states respond to these challenges? If you can at least tell me where to find it that would be great.

    asked by Linda
  22. Astronomy

    Imagine you are on some far away planetary system looking for planets in the galactic neighborhood and you spot our sun in your sky. In degrees, what is the maximum the orbit can be tilted from 90 in order to see a transiting eclipse (assume the longitude

    asked by qwerty
  23. Astronomy

    A newly discovered planet has a surface temperature of 330 K and a density of 6 g/cm3. What minimum radius does the planet need to have in order to hold water in its atmosphere indefinitely? (in km)

    asked by qwerty
  24. Astronomy

    How close to the sun Ganymede would have to be in order to hold water in its atmosphere. (in AU)

    asked by qwerty
  25. Astronomy

    The coolest star whose peak blackbody wavelength can be observed with the human eye (the exact range of visible light varies from publication to publication, so use 380nm to 750 nm).

    asked by qwerty
  26. Astronomy

    What is the estimated total lifetime for a star with mass 0.7 Msun ? (in billions of year)

    asked by qwerty
  27. Math

    Bob has three sacks of apples and three more apples in his pocket. Each sack contains the same number of apples. All together, Bob has 33 apples. How many apples are in each sack?

    asked by Abhishek
  28. algebra

    Brandon hit a baseball upward with an initial speed of 120 feet per second. How much later did Ollie catch the ball? Use the formula h = -16t squared + vt.

    asked by John
  29. PRACTICAL ENGLISH PROCTORED EXAM

    In which of the following sentences is the verb in the active voice? A. The telephone bill was paid yesterday. B. The mother called her son for lunch. C. The boy was called by his mother. D. We were told that Jim is ill.

    asked by kevin
  30. Physics

    A 64 kg student traveling in a car with a constant velocity has a kinetic energy of 1.6 10^4 J. What is the speedometer reading of the car in km/h?

    asked by Donisha
  31. physics

    A Helicopter lifts a Gorrila With Weight 50000kg on String a and on String B a Bunch of Bananas Mass 2000kg , Calculate the Acceleration of the Bunch of Bananas. The helicopter accelerates upwards 1m.s^-2

    asked by Okwa Nini
  32. african american studies

    Slavery and Society, 1800-1860 1. What invention contributed to the need for more slaves in the late 18th century? 2. What region of the United States was slavery most prominent? 3. What percentage of US exports was based on cotton production? 4. Describe

    asked by yessica bonilla
  33. please check(Social studies)

    ): 12. The American Revolution most likely encouraged the Mexican people to revolt against Spain by A. exposing Spain’s lack of resources. (I pick A.) B. introducing new political principles to Mexico. C. inspiring the French Revolution. D. showing that

    asked by bonn
  34. managerialaccounting

    Describe how total variable costs and unit variable costs behave with changes in the level of activity.

    asked by mimi
  35. English

    Identify the excerpt that uses foreshadowing. A.) "They're spoiled and we're spoiled." B.) "I have a feeling it'll be Africa again before then." C.) "Wendy and Peter aren't in their rooms." D.) "They're not old enough to do that alone, I explained." I

    asked by Cassie
  36. geometry

    A slide 2.8 m long makes an angle of 25 degrees with the ground. How high is the top of the slide above the ground?

    asked by Anonymous
  37. english 3b

    How do Realists and Romanticists differ?

    asked by alex
  38. Physics

    A person is travelling 6 km (E) then 4 km (N) and finally 2 km (W). Calculate the average speed And velocity. Show your work

    asked by Mika
  39. Probability

    For each of the following statements, determine whether it is true (meaning, always true) or false (meaning, not always true). Here, we assume all random variables are discrete, and that all expectations are well-defined and finite. Let X and Y be two

    asked by qwerty
  40. Social studies***help***

    HI im Dalia and i just want my answers to be checked for the subject of Social studies.thanks again. 6.Which aspect of Aztec culture benefitted the Spanish when they were conquering the Aztecs? A.The Aztecs made enemies of the surrounding tribes who were

    asked by dalia
  41. English: Please Help

    I do have some corrections made but my computer wont let me copy and paste the part I did. Please Help. This is the uncorrected version: Scientists report that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered

    asked by Cassie
  42. Physics

    A 500 kg go-cart is traveling at 15 m/s when the driver slams on the brakes. The cart comes to a stop in 7 m. If the same braking force is applied, how far will the cart travel after braking if it were traveling at 32 m/s?

    asked by Anonymous
  43. math

    A box contains only quarters and dimes. If there 10% more quarters, the total value of the money in the box would increase by 7.5%. What is the ratio of the number of quarters and dimes in the box? Express your answer as a common fraction.

    asked by Katie
  44. Science

    Which statement best summarizes the world’s reaction to stratospheric ozone depletion discussed in Chapter 7.4 of your text?

    asked by 100 %
  45. life orentation

    briefly explain how the skills of negotiation and mediation can assist one resolving conflicts

    asked by nondumiso
  46. math

    Mrs. Marcincavage allowed each student in her math class to drop the lowest of their five test scores. When Matthew dropped the lowest of his test scores, a 60, his test average increased by 5 points. What is Matthew’s new test average?

    asked by Katie
  47. life orentation

    advantages and disadvantages of being involved in any comflict

    asked by nondumiso
  48. please check(Social studies)

    im not gonna get frustrated with this anymore because it wont help me but i read some info online and thought these new answers where related to the topic 16.Which aspect of Aztec culture benefitted the Spanish when they were conquering the Aztecs? A.The

    asked by dalia
  49. algebra

    Determine whether y varies directly with x if so find the constant of variation k 3y=-7 x-18

    asked by snow
  50. Math

    "Find the slope of the line passing through J(0,5) and K(-1,2)" I did the problem but I just need someone to check if its right. my work: M= y2 - y1 -------- x2 - y1 M= 2 - 5 ----- -1 - 0 M= -3 ---- -1 M= 3 Thank you.

    asked by Kylee
  51. AP Chemistry

    Rank the following in terms of increasing ox- ide acidity. 1. Na2O, CO2, NO2 2. CO2, NO2, Na2O 3. NO2, CO2, Na2O 4. CO2, Na2O, NO2

    asked by Anonymous
  52. please check(Social studies)

    if this isnt right can someone find me a link where i can read more info about it. 17. Which of the following is the most valid reason for not digging up Aztec ruins in modern Mexico City? A.There are no Aztec ruins under Mexico City. B.Mexicans have very

    asked by dalia
  53. Math

    Mr. Bailey mowed his yard in 90 minutes. His son Roy mows the yard in 75 minutes. How long will it take them if they work together (using 2 lawn mowers)?

    asked by John
  54. algebra

    Find the value of y for a given value of x if y varies directly with x if y=2.52 when x=8.4,what is y when x=2.7 thanks

    asked by snow
  55. Physc

    A symmetric projectile spends a total of 20 seconds in the air. It reaches a peak height of 8 meters. HOw long it takes to reach its peak height? The projectile has a range of 80 meters.What is its horizontal velocity? What is the projectile's horizontal

    asked by Mary
  56. Physics

    A 2 kg ball is rolled down a hill 25 m tall. When it reaches the bottom of the hill it is traveling at 15.1 m/s. How much energy was dissipated due to friction?

    asked by Tyler
  57. Chemistry

    How much would the boiling point of water increase if 4 mol of sugar were added to 1 kg of water (Kb=0.51C/(mol/kg)for water and i=1 for sugar)?

    asked by Whitney
  58. slavery and society

    1. what institutional mechanisms helps to regulate slavery? 2. what factors contributed the deterioration of the black family during this era? 3. what were some of the ways some slaves rebelled against their condition? 4. describe two of the leaders of the

    asked by yessica bonilla
  59. Algebra

    Long Divide: (x^2 + 3x + 5)/ (x + 3) Thanks.

    asked by Jack
  60. algebra

    A leaky value on the water meter overcharge the residents for one gallon of water every 1 1/3 months.the overcharged amount w varies directly with time t find the equation that models this direct variation how many months it will take for the residents to

    asked by snow
  61. Heat Transfer

    A hollow tube having an inside diameter of 2.5 cm and a wall thickness of 0.4 mm is exposed to an environment at h=100 W/m2¨¬C and T¡Ä =40¨¬C. What heat generation rate in the tube will produce a maximum tube temperature of 250¨¬C for k =24

    asked by Ritesh
  62. math probability

    Daytime high temperatures in New York in February are normally distributed with an average of 30.2º and a standard deviation of 8.5º. Estimate the probability that the temperature on a given day in February is 39º or higher.

    asked by Jamar
  63. math Standard deviation

    Six students took a national standardized test for which the average score was 700 and the standard deviation was 150. If a student’s z-value is 1.75 on the test, what was the student’s score?

    asked by Jamar
  64. Math probability

    An experiment consists of drawing a marble out of a bag, observing the color, and then placing it back in the bag. Suppose the experiment is repeated 75 times, with the following results: red 38 blue 23 green 11 yellow 3 What is the probability of drawing

    asked by Jamar
  65. Math 3

    Cindy runs a company that designs and prints gift cards for a department store. Quality controls is very important, and Cindy must determine that the cards are being printed properly. For every 6,000 batches of 100 cards that are printed, she examines

    asked by Jamar
  66. English help..

    Can someone check to see if this is written correctly? It was like this - Scientists report that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live, in the deep sea. Creatures in the seabed are

    asked by Cassie
  67. basic algebra

    A park ranger's team tags 6 wolverines. A month later, they catch 5 wolverines of which 2 have tags. Estimate the number of wolverines that live in the park.

    asked by Mike
  68. Basic algebra

    Bill drives his car 10 mph faster on the way home from work than he does going to work in rush hour. If it takes him 1 hrs. going and half an hour returning, how far away is his work?

    asked by Mike
  69. Geometry

    Which statement from Euclidean geometry is also true in spherical geometry? a. A line has infinite length b. Two intersecting lines divide the plane into four regions c. Two perpendicular lines create four right angles d. The intersection of two lines

    asked by Kylee
  70. Math

    Doug needs to purchase four sheets of marine grade plywood to make repairs on the roof of his garage. Depending on the type of tree used to make the wood, the cost of the plywood is between $42 and $45 per sheet. Which of the following is a possible amount

    asked by Gabby
  71. Economics

    A clinic has $1 million in revenues and $950,000 in costs. What is its operating margin? My answer is 5% However the second question is if the clinic invested $400,000. What is the return on investment and is it adequate. Not sure how I calculate that.

    asked by Lisa
  72. HELPPPP NOOWW !!!!!

    Type the pronoun that correctly completes the sentence. Remember that you must spell your answer correctly to receive credit. Yes, the one who designed the house was (she, her). (Points : 1) Question 2. 2. Type the pronoun that correctly completes the

    asked by kaila flowers
  73. Math

    Bill has a savings account in Sierra Bank and earns interest at 2 1/4%. He is considering moving his business to Coulee Bank to earn 2 11/20% in interest. How much more is the interest rate at Coulee Bank than at Sierra Bank?

    asked by Gabby
  74. math

    1.09%1000

    asked by rajwinder
  75. College Chemistry.

    During volcanic eruptions, hydrogen sulfide gas is released and is oxidized by the oxygen in the air yielding sulfur dioxide gas and water vapour. Calculate the standard enthalpy change for this reaction given the following: 3S(rhombic) + 2H2O(g) →

    asked by Tomisin
  76. science HELP ASAP!!!!!!!

    1. in which biome would you find the main types of plants life to be grasses and nonwoody plants? (1 point) 2. Which of the following determines the type of biome classification that will be made for a particular region? (1 point) 3. which of the following

    asked by annonomys
  77. Alegebra 2

    Two positive numbers differ by 2. Their reciprocals add to 3. Find the numbers. (keep your answer in simplest radical form)

    asked by Anonymous
  78. Financial Management

    Your company will generate $68,000 in an- nual revenue each year for the next seven years from a new information database. If the appropriate interest rate is 8.5 percent, what is the present value of the savings?

    asked by Anonymous
  79. Math

    A marine life amusement park has 6 killer whales. Each whale consumes about 225 kilograms of fish and other see life per day. Based on this information, which would be the most reasonable estimate of the amount of “whale food” that should be ordered

    asked by Gabby
  80. Tourism

    How can government people and citizens help increase tourism? If I can get a website for this, that would be fine.

    asked by Anonymous
  81. Algebra

    Bill drives his car 10 mph faster on the way home from work than he does going to work in rush hour. If it takes him 1 hrs. going and half an hour returning, how far away is his work?

    asked by June
  82. help

    can anyone answer this...if you want me to try first i came up with the answer A. for the following question Which of the following best describes a way in which the United States has helped the Mexican economy to grow? A.allowing Mexican workers in the

    asked by dalia
  83. math

    need some help 2x^2 + 5x -3

    asked by WINSTON
  84. math

    i need help understanding this problem. 3x^2+4x+2=0

    asked by WINSTON
  85. basic algebra

    Boris has 10 ounces of a 10% acid solution. How many ounces of 25% acid solution should he add to make a solution that is 20% acid? Thank you.

    asked by Mike
  86. Algebra

    Mr. Bailey mowed his yard in 90 minutes. His son Roy mows the yard in 75 minutes. How long will it take them if they work together (using 2 lawn mowers)? How to set up an equation? Thank you.

    asked by June
  87. social studies

    can someone answer this please and thanks .How has Mexico's culture been shaped by conflict among different people? Be sure to name the groups were involved in the conflict, describe the conflict, and explain how the conflict or cooperation shaped Mexico's

    asked by dalia
  88. social studies

    1. who was the governor of Louisiana when the civil war began ? 2. at the begging of the civil war the free men of color supported the Confederacy ? true or false 3. who was the military governor of Louisiana ?

    asked by victoria
  89. chemistry 2

    You are instructed to create 800. mL of a 0.69 M phosphate buffer with a pH of 7.6. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. what is the molarity needed for the acid component of the buffer?What is the molarity

    asked by Danielle
  90. Algebra

    what solid has 2 bases that are triangles and 3 lateral surfaces that are rectangles a- triangular pyramid b- rectangular prism c- triangular prism d- rectangular pyramid my answer is C

    asked by Steve
  91. english

    Sentence for word duke.

    asked by atul
  92. Algebra - Domain

    Find the domain of the function: 0=((y-4)/(8-sqrt(y)))

    asked by Freddy
  93. US history

    1. In the early years of the war, all reports coming to the USA had to be “cleared” through England. 2. In the 1916 presidential election, Republicans used the slogan “He kept us out of war” against Wilson. 3.Wilson’s Fourteen Points called for

    asked by Lisa
  94. math

    What is the main difference between a square and a rhombus?

    asked by anthony awesome
  95. Math

    The land on Earth’s surface is represented by the seven continents. Europe has 77% of the dry land while Africa has 20%. North America has 4/25 and Antarctica has 1/10 of the dry land. What fractional amount of the dry land is contained within the three

    asked by Anonymous
  96. Geometry

    A right triangle must be a. isosceles b. acute c. scalene d. either isosceles or scalene

    asked by Kylee
  97. C++

    Would you check and correct my error please! ******************************* #include #include #include viod Binary_to_Decimal(); int main(int argv,char argc) { while(1

    asked by Ayk
  98. Geometry

    Which of the following is not a postulate used to prove the congruence of two triangles? a. ASA b. SSA c. SAS d. SSS I think its C?

    asked by Sarah
  99. Algebra

    what is the formula used to calculate the surface area for a square pyramid?

    asked by Steve
  100. Math

    Mr. White notices that of the 30 students in his science class, 18 are using yellow pencils, 6 are using blue pencils, 4 are using erasable ink pens, and 2 are using mechanical pencils. If his class is representative of the student body, and there are 600

    asked by Anonymous
  101. Algebra

    what is the formula used to calculate the lateral area for a square pyramid?

    asked by Steve
  102. Physics

    A knife thrower throws a knife toward a 300-g target that is sliding in her direction at a speed of 2.30 m/s on a horizontal frictionless surface. She throws a 22.5-g knife at the target with a speed of 39.5 m/s. The target is stopped by the impact and the

    asked by Timothy
  103. Math

    The recommended fluid intake for an adult is 64 ounces a day. By non, Shelly has had 2 cups of water. How many more ounces of fluid does Shelly need to consume in order to reach the recommended fluid intake? A 48 fl oz B 8 fl oz C 16 fl oz D Not here

    asked by Anonymous
  104. Math Word Problem

    Hey guys, I believe the answer is $0.96 I just don't know if it is right or not. Here's the question: Mr Veung buys tins of tuna in cases of 24 tins. He pays $20.16 for a case. If the markup on each tin of tuna is $0.12. How much do you pay for a tin of

    asked by Harmony Ann
  105. AP World History

    1.How did the Atlantic Revolutions influence the development of new states and ideologies? 2. Compare the challenges to the 18th century Muslim world and the causes of the Atlantic Revolutions?

    asked by Linda
  106. Which is greater?

    27,648 42.39 7.85 32,400 (I think its 32,400)

    asked by Anonymous
  107. 4th garde math

    J.T. shaded 3/5 of a rectangle. Mary shaded 4/12 of a congruent rectangle. who shaded more. how do you know

    asked by mythreyee
  108. 4th grade math

    Billy shaded 6/8 of a circle. mary shaded 15/16 of congruent circle. who shaded more. how do you know

    asked by mythreyee
  109. social studies

    who was the military governor of Louisiana ?

    asked by victoria
  110. social studies

    at the begging of the civil war the free men of color supported the Confederacy true or false ?

    asked by victoria
  111. social studies

    Commander of all the Confederate forces who surrendered at Appomattox Court House

    asked by victoria
  112. social studies

    How did the federal blockade of New Orleans affect the citizens of Louisiana ?

    asked by victoria
  113. POEM FOR MS.SUE

    I LOVE UR ATTITUDE UR SO KIND FOR ALL UR KINDNESS YOU NEED A PENNY AND BY THEN YOU WILL BE A BILLIONAIRE THANK YOU HUN FOR EVERYTHING LOVE U FOREVER UR SECRET ADMIRER BTW I LOVE U BABE FOR UR SMARTNESS

    asked by A=Awesome
  114. NEED HELP ASAP !!

    A mountain climber on Mt. Everest is at 29,035 ft above sea level a stone at the bottom of the Dead Sea is at 1,349 ft below sea level what is the difference in elevation between the mountain climber and the stone

    asked by A=Awesome
  115. Pre-Calc

    why is the line =+t perpendicular to the plane 3x=4y+5z=10

    asked by Danielle
  116. Chemistry

    what volume of concentrated 18M H2SO4 is required to prepare 250mL of a 6.0M solution? how would you solve this problem? i know it has something to do with the molarity formula but no idea how to apply it

    asked by Lena
  117. Math

    If I have a square pyramid. Each side of the base has 60m and the height is 20 m. What is the lateral area of pyramid

    asked by Urs
  118. Language

    What's the easiest way to tell the difference between participles and gerund? Besides that one is a adjective and the other one is a noun and the type of questions they ask.

    asked by Lily
  119. Physics

    Three astronauts, propelled by jet backpacks, push and guide a 149 kg asteroid toward a processing dock, exerting the forces shown in the figure, with F1 = 28 N, F2 = 59 N, F3 = 41 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle

    asked by Anonymous
  120. Chemistry

    if 25.0 mL of 15M nitric acid is diluted to 125 mL, what is the concentration of the new solution? i got 3M but i don't think its right

    asked by Anonymous
  121. Math

    Write an equality to describe the situation. A sleeping bag will keep a person warm in temperatures down to -20 degrees farenheit.

    asked by Anonymous
  122. socialstudies

    How has Mexico's culture been shaped by conflict among different people? Be sure to name the groups were involved in the conflict, describe the conflict, and explain how the conflict or cooperation shaped Mexico's culture.

    asked by dalia
  123. Algebra

    Neil gets in an elevator at the 30th floor and it begins to move downward at a speed of 8 feet per second. After 12 seconds the elevator is 240 feet above ground. a. Let y= the height in feet of the elevator 'x' secinds after Neil got in. Write an equation

    asked by Natalie
  124. History-help

    I need help on this! Please help me! Thank you :) you're a huge blessing! What is driving the economic changes in china and why? What economic system do you believe china is? Why? What are the goals and dreams of the Chinese compared Americans? What are

    asked by Anonymous
  125. Math

    A square pyramid each side of the base has a length of 60 m and the height of each triangle is 20 m. What is the lateral area of the pyramid?

    asked by Urs
  126. Physics -- check answers please

    1. Which of the following best shows the transfer of heat by radiation? my answer: c 2. Which of the following best shows the transfer of heat by convection? my answer: b 3. Water has specific heat of 4200 J per kilogram per degree celsius. This means that

    asked by Lisa
  127. Physics -- check answers please (new)

    1. Which of the following best shows the transfer of heat by radiation? a) the hot sand in very painful to step on with bare feet b)the soup pot boils from the bottom towards the top c)the wood stove is painted a flat black colour for maximum heating

    asked by Lisa
  128. Canals

    What exactly does a canal do, and how does it work?

    asked by Anonymous
  129. Math

    How do I use gauss-jordan to solve this? Can you explain the steps and show what you multiplied, added, subtracted, etc to each row? 8x + 2y = -68 -7x - y = 55

    asked by Sara
  130. math

    Write an inequality to describe the situation. A sleeping bag will keep a person warm in temperatures down to -20 degrees farenheit.

    asked by Anonymous
  131. Chemistry

    if 25.0 mL of 15M nitric acid is diluted to 125 mL, what is the concentration of the new solution? i got 3M but i don't think its right

    asked by Anonymous
  132. Math

    If a rectangle has a perimeter of 12 meters and each side is a whole number of meters, what are the possible dimentions for the length and width? List them and explain your answer.

    asked by Hero
  133. math

    The diameter of an electric cable is normally distributed, with a mean of 0.6 inch and a standard deviation of 0.01 inch. What is the probability that the diameter will exceed 0.61 inch?

    asked by lorine
  134. Math help

    The land on Earth’s surface is represented by the seven continents. Europe has 77% of the dry land while Africa has 20%. North America has 4/25 and Antarctica has 1/10 of the dry land. What fractional amount of the dry land is contained within the three

    asked by Anonymous
  135. math please help

    Write an equality to describe the situation. A sleeping bag will keep a person warm in temperatures down to -20°F. Please I really need help.

    asked by Anonymous
  136. health

    People who regularly engage in at least moderate intensity aerobic activity have a significantly lower risk of developing ________ than do inactive people. A. Type 2 diabetes B. Lung cancer C. Hip fractures D. Breast cancer

    asked by Anonymous
  137. Chemistry

    Compare the physical and chemical properties of acids and bases.

    asked by Brian
  138. History

    Where did the first nations settle ?

    asked by Anny
  139. Physics

    A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient

    asked by Ali
  140. Pre-Calc Help please

    Solve for x: log base5 (4x) + log base5 (x) = log base5 (64)

    asked by Aly
  141. Science

    How was Ama Dablam formed?

    asked by Anonymous
  142. algebra

    A leaky value on the water meter the residents for one gallon of water every 1 1/3 months the overcharged amount w varies directly with time t find the equation that models this direct variation how many months it will take for the residents to be

    asked by snow
  143. Social Studies

    What are the exact dates and the 4 different routes Vasco Nuñez de Balboa took?

    asked by Hayden
  144. Math

    Kerry skates laps around the playgroung. The playground is 150 meters long and 50 meters wide. How many laps will it take her to skate 1 kilometer? I need els really badly and I av a math test tommorow I need to study perimeter and area.... I old

    asked by Ida
  145. Hstory help asap

    How did the cultural contact between Europeans and the First Nations affect the ways of life of people who lived on the Rupert river?

    asked by Anny
  146. SOCIAL STUDIES

    WHY DO I LOVE SOCIAL STUDIES???????

    asked by SARAH
  147. Algebra 2

    Can someone please check my answers? The question is: Write an equation for the perpendicular bisector of the line segment joining the two points. (-5,6),(1,8)= y=-3x+1 (1,4),(6,-6)= y=(1/2)x-(3/4) (5,10),(10,7)= y=(5/3)x-(17/3)

    asked by Jane
  148. Math

    Gold medalist, in freestyle skiing, Justine Duford-Lapointe, is trying to get to her hotel. She can only travel north and east. The grid is a 5*5 followed by a 2*2, followed by a 8*8. How many ways can she take to her hotel?

    asked by Anonymous
  149. Chemistry

    How would you calculate the pH of the buffer if 1.0mL of 5.0M NaOH is added to 20.0mL of this buffer? Can someone please explain to me how to do B and C step by step so I could understand it clearly? :) Say, for example, that you had prepared a buffer in

    asked by Airin
  150. chemistry 1

    DDT concentrations in ground water. How do you set it up with a sample size of 250.0mL and the mass of DDT at 0.030 and then convert to millimoles. Just can't remember how to set it up.

    asked by john
  151. Math

    How do I solve this problem? : Four rectangle strips of wood, each 30 cm long and 3 cm wide, are arranged to form the outer section of a picture frame, as shown. Determine the area in side the wooden frame.

    asked by Gaby
  152. Math

    do the equations y=2x+3 and x=1-2y have common solution, no common solution or infinitely many common solutions?

    asked by Brooke
  153. chemistry

    which of the following summarizes Charles' Law? A. as temperature decreases, the gas particles slow down and take up less space B. as temperature increases, the gas particles slow down and take up less space C. when pressure decreases, the gas particles

    asked by Brianna
  154. algebra

    What is the slope of the line that passes through the given points?(2,12)and(6,11) answers are -1/4, 1/4, 4, -4. Thank you

    asked by snow
  155. math

    y=tanx/cosx-4

    asked by jnky
  156. Physics

    Please help me with the following problem: Joe is on a cross-country trip from New York to Los Angeles. He drives for 45.0 min at 70.0 km/h, 10.0 min at 95 km/h, and 30.0 min at 55.0 km/h, and he spends 20.0 min eating lunch and buying gas. What is the

    asked by Brady
  157. math

    y= x^3 sinx - 5cosc

    asked by jnky
  158. math

    A box contains only quarters and dimes. If there 10% more quarters, the total value of the money in the box would increase by 7.5%. What is the ratio of the number of quarters and dimes in the box? Express your answer as a common fraction.

    asked by Katie
  159. Physics

    A block of weight 4.8 N is at rest on a horizontal table. An upward vertical force of 0.6 N is applied to the block by means of a string. What is the magnitude of the force exerted by the block on the table top?

    asked by Yarielis
  160. math

    find d^2y of y=4sec 2cscx

    asked by jnky
  161. Chemistry

    Compare the physical and chemical properties of acids and bases.

    asked by Damon
  162. Reading

    Can someone explain the last 2 sentences in this paragraph...................................................................Here is one white visitor's account after visiting the Cotton Club as recorded in the New Yorker magazine...the big bass drum boom,

    asked by cee
  163. Croissant park

    green paint jar is 4/8 full the purple jar is 4/6 which paint jar is less full

    asked by Dwayne
  164. math

    y= cosxtanx

    asked by jnky
  165. Math help

    I need help on these problems. There over solving equations by factoring. Don't get it at all. 1. (Y+5)(Y-7)=0 2. 2n(n-20)=0 3. (2t-3)(3t-2)=0 4. (2u+7)(3u-1)=0

    asked by Anonymous
  166. ESl

    what is the conflict on concluding sentence of mice and men book ??

    asked by Iqbal
  167. English

    Should kremlin be capitalized in this sentence. I want to see Moscow, especially the kremlin, which was the seat of government for the former Soviet Union.

    asked by Kelley
  168. math

    a piece of wire 24 ft. long is cut into two pieces. one piece is made into a circle and the other piece is made into a square. Let the piece of length x be formed into a circle. allow x to equal 0 or 24, so all the wire is used for the square or for the

    asked by jason
  169. algebra

    Can you explain to me how I have the answer put how do I find out how to find the right answer the question is what is an equation of the line in slope intercept form answers are y=2 x-2, y=-2 x-2, y=-2 x+2, y=2 x+2 want to know how to do them. Got to draw

    asked by snow
  170. Physics

    A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient

    asked by Trevor
  171. chemistry

    Calculate the mass of nickel(II) sulfate and the mass of water contained in 200. g of a 6.00% solution of nickel(II) sulfate

    asked by Sarah
  172. Physics

    You are carrying a backpack across campus. What is the work done by your verticals carrying force on the backpack? Please explain...

    asked by Michael Smith
  173. MATH

    a molecule of sodium carbonate contains 2 atoms of sodium to every 3 atoms of oxygen. could a compound containing 12 atoms of sodiumand 15 atoms of o2 be na carbonate explai

    asked by AMY
  174. SS

    Which do you think is more accurate to describe the location of the Middle East, to the east of the Mediterranean or to the west of India?

    asked by Anonymous
  175. algebra (solve for y)

    0=e^(2y)-e^(y) Need to solve for y here, don't understand why answer is -ln(2) in the book. Thanks.

    asked by David
  176. Physics

    Does it take twice the work to stretch a spring 2cm from its equilibrium position as it does to stretch it 1cm from its equilibrium position? Yes it does. (Just want to double check my answer)

    asked by Michael Smith
  177. Still waiting for help...

    How did the cultural contact between Europeans and the First Nations affect the ways of life of people who lived on the Rupert river?

    asked by Anny
  178. physics

    A pilot heads her plane with a velocity of 275 km/hr north. If there is a strong wind of 130 km/hr blowing east, what is the magnitude of the velocity of the plane in reference to the ground.

    asked by jarrod
  179. physics

    Can you help me everybodyyyy!!!! A charge Q = 14.0 μC is distributed evenly on a wire bent into an arc of radius R = 40.0 cm, as shown in the figure. What is the electric field at the center of the arc that subtends θ = ±53.0°?

    asked by zeigarnik7
  180. physics

    A bullet with mass 4.95 g is fired horizontally into a 1.994 kg block attached to a horizontal spring. The spring has a constant 5.58 10^2 N/m and reaches a maximum compression of 6.27 cm. (a) Find the initial speed of the bullet-block system. (b) Find the

    asked by Anonymous
  181. Math

    Eric has two rock samples. One has a mass of 600 grams and the other has a mass of 1 kg. He recorded the total mass as 7 kg. What did he do wrong? What is the correct answer?

    asked by Ann
  182. introductory to physics

    A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 4.0 m/s. The acceleration of gravity is 9.81 m/s 2 . What is the initial height of the bob? Answer in units of m

    asked by alicia
  183. physics

    A stone is tied to a string (length = 1.25 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

    asked by Anonymous
  184. Algebra

    Robert needs to fill up a box with packaging material. Use the picture below to calculate the volume of the box. Length (2x+3) Width (x+2) Height (x-3)

    asked by Teresa
  185. Differential Equations

    A college professor contributes $5,000 per year into her retirement fund by making many small deposits throughout the year. The fund grows at a rate of 7% per year compounded continuously. After 30 years, she retires and begins withdrawing from her fund at

    asked by Victor
  186. physics

    The plane is traveling at 288 m/s on a vertical circle of radius 622 m. Determine the ratio of the normal force to the magnitude of the pilot's weight. For comparison, note that black-out can occur for ratios as small as 2 if the pilot is not wearing an

    asked by Anonymous
  187. AP physics

    Pilots of high-performance fighter planes can be subjected to large centripetal accelerations during high-speed turns. Because of these accelerations, the pilots are subjected to forces that can be much greater than their body weight, leading to an

    asked by Anonymous
  188. Physics

    A sound wave in a solid has a frequency of 15.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air?

    asked by Melanie
  189. Chemistry

    If 0.08 mol of LiCl is added to a one liter solution that has dissolved 0.01 mol of PbCl2, will a precipitate occur?

    asked by Allie
  190. algebra

    The sum of two numbers is 30 and their difference is 2. Find the two numbers by writing and solving a system of equations.

    asked by billy
  191. AED

    I am a little confused on how I go about writing these? Go to the National Access Network website and review the educational funding issues for South Dakota. Try to find information about the affect of school choice options on educational funding. From DQ

    asked by Jamie
  192. Algebra

    Terry is mailing two boxes. Together they weigh 21 lbs. If the smaller box is 5 lbs. less than the larger one, how much does each box weigh? Write and solve an equation that models this scenario.

    asked by billy
  193. algebra

    Mary has a total of $5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was $331. Write and solve a system of equations to find out how much she has invested in both accounts.

    asked by billy
  194. Physics

    A 96.0-g wooden block is initially at rest on a rough horizontal surface when a 11.4-g bullet is fired horizontally into (but does not go through) it. After the impact, the block–bullet combination slides 6.5 m before coming to rest. If the coefficient

    asked by Wendy
  195. math

    y = x^3 sinx / 5cosx

    asked by jnky
  196. physics

    A roller-coaster car of mass 1.80 103 kg is initially at the top of a rise at point circle a. It then moves 40.8 m at an angle of 50.0° below the horizontal to a lower point circle b. (a) Find both the potential energy of the system when the car is at

    asked by sarah
  197. math

    y= cotX / cosX-4

    asked by jnky
  198. math

    x^3(sinx)/ 5cosx

    asked by jnky
  199. Physics

    Two children pull a third child on a snow saucer sled exerting forces F1 and F2 as shown from above in Figure 4.36. Find the acceleration of the 49.00-kg sled and child system. Note that the direction of the frictional force is unspecified; it will be in

    asked by Mohanad
  200. math

    y= (3x^3+2x)cotx

    asked by jnky