kara

Newest questions posted by kara
  1. Physics

    How come in the number 5.350, there are 4 significant figures? Is the 0 considered a trailing zero with a decimal?
  2. Math

    The corners of a square lie on a circle of Diameter D = 0.35m. Each side of the square has a length L. Find L. - I'm not quite sure how to solve this problem
  3. Math

    Is centimeter an S.I unit?
  4. Geometry

    What is the measure of an angle of a right triangle if the side opposite the angle has length 4 and the hypotenuse has length 8? - So far I did: sin x = 4/8 x = sin^-1 (4/8) x = 0.50° - I'm not sure what to do next
  5. Chemistry

    The photoelectric effect is a concern in space, where parts of a spacecraft exposed to the sunlight will develop a net positive charge, which can interfere with or damage sensitive cir The panels that cover the exterior of the Space Shuttle are composed of
  6. Chemistry

    Element x has the highest first electron affinity in its period, the ground state electron configuration of its common is: [Kr] 5s2 4d10 5p6 Element Y is the second largest element in its period; its valence electron are in orbital(s) that have n= 6. What
  7. Chemistry

    List SOF2, SO2F-, and S2O3^-2 in order of increasing sulfur-to-oxygen bond length. How do u tell by just looking at the Lewis structures?
  8. Chemistry

    A mineral that contains iron and sulfur has the cubic unit cell pictured below. What is the empirical formula for this mineral? •Fe atoms are the smaller spheres; one on each corner and one on each face of the unit cell •S atoms are the eight larger
  9. Chemistry

    Is the NO3- single bond length shorter than NO2H single bond length? Based on Lewis structure of it.
  10. Chemistry

    Howard Wolowitz is developing a radiation detector for the Intemational space Station. He uses a thin film composed of a metal alloy that has a threshold frequency of 5.5x10^15 Hz. When radiation is shone on the thin film, the fastest electron emitted has
  11. Chemistry

    I have this question from an old exam for review. I tried the question but can't get the right answers. An electron in an electronically excited hydrogen atom undergoes a transition from a 6d to a 2p orbital, resulting in the emission of a photon. The
  12. Chemistry

    I have this question from an old exam for review. I tried the question but can't get the right answers. An electron in an electronically excited hydrogen atom undergoes a transition from a 6d to a 2p orbital, resulting in the emission of a photon. The
  13. algebra

    A rope is cut into three and one-third is used. Then one-fourth of the remaining rope is cut off and used. The piece left is 6 meters long. How many meters long was the rope originally?
  14. Chemistry

    A farmer wants to capitalize on the amount of sunlight shining on his farm everyday by building a solar power tower. The manufacturer\'s specifications state that the solar tower has 5.0 × 101 heliostats, each with an area of 2.10 m2. If the total amount
  15. Biology

    Which of the following mechanisms for osmoregulation or nitrogen removal is correctly paired with its corresponding animal? A) metanephridium-earthworm B) Malpighian tubule-frog C) kidney-insect D) flame- bulbsnake
  16. Biology

    Unikonta paraphyletic or monophyletic? Animalia paraphyletic or monophyletic?
  17. Chemistry

    A hydrogen atom in one of its excited states ha an energy of -1.5129^20 J. What is the frequency of radiation is emitted when the atom relaxes down to its ground state?
  18. physics

    The displacement of a block of mass 778g attached to a spring whose spring constant is 38N/m is given by x=Asin(ωt) where A=25cm. In the first complete cycle find the values of x and t at which the kinetic energy is equal to one half the potential energy.
  19. p

    The displacement of a block of mass 778g778g attached to a spring whose spring constant is 38N/m38N/m is given by x=Asin(ωt)x=Asin(ωt) where A=25cmA=25cm . In the first complete cycle find the values of xx and tt at which the kinetic energy is equal to
  20. physics

    A 300g particle oscillating in SHM travels 35cm between the two extreme points in its motion with an average speed of 30cm/s. Find: a) The angular frequency. b) The maximum force on the particle. b) The maximum speed.
  21. physics

    A 750g block is attached to a vertical spring whose stiffness constant is 1N/m . The block is released at the position where the spring is unextended. a) What is the maximum extension of the spring? How long does it take the block to reach the lowest
  22. physics

    A block attached to a spring is displaced from equilibrium to the position x=+0.5m and released. The period is 2.1s . At what positions and times during the first complete cycle do the following conditions occur. a) |v|=0.5vmax, Where vmax is the maximum
  23. physics

    With a block of mass m , the frequency of a block-spring system is 1.8Hz. When 50g is added, the frequency drops to 1Hz . Find m and the spring constant.
  24. physics

    The displacement of a block attached to a horizontal spring is given by x=0.5sin(7.8t−1.06)m What is the earliest time (t>0) at which x=0.16m? Find the acceleration when x=0.44m helppppppp
  25. Math

    How to rearrange the given equation for A: [ln(Ao/A)=k*t] * means multiply / means divide ln is the natural log function
  26. Math/Chemistry

    How to rearrange the given equation for A: ln (Ao/A) = k*t
  27. Math/Chemistry

    How to rearrange the given equation for Ao: ln (Ao/A) = k*t
  28. Math

    keith went to the candy store and bought 2/6 of a pound of candy.8/10 of keiths candy was chocolate. how.many pounds of chocolate candy did keith buy?
  29. social studies

    summarize the reasons for writing the Declaration of Independence. Please help
  30. math 8th grade

    How do you prepare for a math test?? Please help me i don't understand the question.
  31. Math

    Please check my responses! ASAP Consider the following data set: 3,4,6,7,9,9,11 If 5 were added to each of the values, how would that affect the median? My Answer: The median would change and increase. Consider the following data set: 3,4,6,7,9,9,11 If 5
  32. Math Algebra

    A boat takes 1 hour less to go 200 miles downstream than upstream. If the rate of the current is 3 miles per hour, what is the rate of the boat in still water?
  33. Chemistry

    I've run into some difficulty with my chemistry homework. We went over this practise question in class today as an example. However, I wasn't able to fully grasp how to work it out. "How many grams of nitrogen form when 34.6 grams of nitrogen dioxide
  34. statistics

    A sign is posted in an elevator stating that the maximum number of people allowed is 25, and that the maximum weight capacity is 4000lbs. Suppose the distribution of the variable Weight (among the population using the elevator) is normal with mean 150lbs
  35. Language Arts

    I need to write to compare and contrast geology and etymology. How do I do that?
  36. Algebra

    Then you Trisha much are on the side of the box of cereal states that there are 84 calories in a three fourths cup servings. How many calories are in eight cups of cereal? My question us how do i get started
  37. chemistry

    If I contain 3 moles of gas in a container with a volume of 60 liters and at temperature of 400 K, what is the pressure inside the container? Ideal Gas Law: PV=nRT I know I'm given the volume, temperature, and numbers of moles of gas, but how do I know
  38. Science

    A liquid solution of formaldehyde is 37% pure. This solution has a specific gravity of 1.037. The molecular weight of formaldehyde is 30.0. To 1.00 ml of this impure stock solution is added quantity sufficient total the total volume to 500 ml. If 1.00 ml
  39. Math

    Joe wants to carpet a 12 foot by 18 foot rectangular living room and a square bedroom. One side length of the square bedroom is 12 feet. Carpet costs $3.50 per square foot. What percent of the total amount Joe will pay will be spent on carpeting the
  40. math:order of operation

    TWO PART Ellen is playing a video game in which she captures butterflies. There are 3 butterflies onscreen, but the number of butterflies doubles every minute. After 4 minutes, she was able to capture 7 of the butterflies. A)LOOK FOR A PATTERN. Write an
  41. math

    3/7, 5/6, 4/5 least to greatest
  42. Medical Administrative Assistant

    I need help adding some stuff to this exam please help Exam 028005 It has come to my attention after a conversation with a DMD Medical Supplies representative that some of our work for them has been subpar. Knowing we are a customer driven company I did
  43. chemistry

    can you please give me some practical applications of qualitative chem and quantitative chem...
  44. statistics

    Suppose x is a uniform random variable with c=10 and d=60. Find the probability that a randomly selected observation exceeds 30.
  45. Math

    The pressure exerted by a certain liquid at a given point varies directly as the depth of the point beneath the surface of the liquid. The pressure at 30 meters is 80 newtons per square centimeter. What pressure is exerted at 50 meters?
  46. math

    how do you divide .29 by 34580
  47. Math

    What is .2 + .5674
  48. Chemistry

    A 9.00-L container holds a mixture of two gases at 43 °C. The partial pressures of gas A and gas B, respectively, are 0.257 atm and 0.579 atm. If 0.110 mol a third gas is added with no change in volume or temperature, what will the total pressure become?
  49. ASU

    How much MnO2(s) should be added to excess HCl(aq) to obtain 215 mL of Cl2(g) at 25 °C and 705 Torr?
  50. Chemistry

    The elements of which group in the periodic table release the most energy by gaining an electron? The elements of which group in the periodic table absorb the most energy when gaining an electron?
  51. english

    Questions about Avi(the author) Why was school a constant struggle for him? Avi kept writing because of the encouragement of his family and the help of whom? After college, what job did Avi take? where? When did Avi become interested in children's
  52. grammar

    Is the word Drives transitive or intransitive in the following sentence? Michael drives every day.
  53. grammar

    is the word thirst transitive or intransitive in the following sentence? I thirst.
  54. grammar

    Is the verb drives transitive or intransitive in the following sentence? Micheal drives his own car.
  55. grammar

    Is the verb crave CRAVES in the following sentence transitive or intransitive? Fred craves cheeseburgers.
  56. algebra 1-2

    what is a natural number?
  57. grammar

    What part of speech is the word run in the following sentence? I have a run in my hose.
  58. math

    a family wants to build a pool their yard is 20 yards wide and thirty yards deep. unfortunately, the dealer only deals in liter size pools. what is the biggest size pool they can get?
  59. chemistry

    2NOBr(g) 2NO(g) + Br2(g) and the value of Kc = 1.98, at a temperature of 282 K what is the value of Kp ? (Hint: Use the value of R in the appropriate units.)
  60. Physics

    An electron with a horizontal speed of 4.0 * 10^6 m/s and no vertical component of velocity passes through two horizontal parallel plates. The magnitude of the electric field between the plates is 150 n/c the plates are 6.0 long A) calculate the vertical
  61. Physics

    An electron with a horizontal speed of 4.0 * 10^6 m/s an no vertical component of velocity passes through two horizontal plates. The magnitude of the electric field between the plates is 150 n/c. The
  62. Sciene

    How do living things get rid of cellular waste?
  63. Algebra

    A dog trainer has 64 ft of fencing that will be used to create a rectangular work area for dogs. If the trainer wants to enclose an area of 192 ft2, what will be the dimensions of the work area?
  64. Geometry

    Given: Segment CE bisects
  65. Algebra

    2x/3 + 1/4= x/6 - 1/2 solve for x
  66. Algebra

    3/4 ÷ x = 1/3 solve for x
  67. math

    2a + 7b + 17c = 31 How do you work out what a,b and c are?? any help would be appriciated
  68. physics

    Your friend weighs 145 lb. What is her mass in kilograms if she went to the moon where the acceleration of gravity is 1/6 that on earth? i know that her weight in newtons is 652.5, and that her mass in kilograms is 65.25, and that her weight in newtons if
  69. math

    Two blocks sit on a horizontal surface. They are connected to each other by a massless cord. The block on the left has a mass of 5.1 kg and the block on the right has a mass of 3.0 kg. Another massless cord is attached to the block on the right and pulls
  70. math

    A skydiver with a weight of 185 lbs is falling. At a certain moment the force of air resistance on the sky diver is 145 lbs. What is the skydiver's acceleration at this moment? (Hint: Remember that the weight of an object is given by mg.) AND When the
  71. science

    What is the cell potential and voltage gradient?
  72. physics

    An object has a height of 65 cm and is positioned 6.2 m in front of a spherical mirror. Its image distance is 1.9 m. Calculate the height (including its sign) of the image in centimeters.
  73. Pre Cal

    Two tracking stations are on the equator 158 miles apart. A weather balloon is located on a bearing of N 41degrees E from the western station and on a bearing of N 21degrees E from the eastern station. How far is the balloon from the western station.
  74. Pre Cal

    An airplane leaves an airport and flies due west 150 miles and then 230 miles in the direction S 39.67 degrees W. How far is the plane from the airport at this time to the nearest mile.
  75. Pre Cal

    tan 2x- tan 6y/ 1+ tan 2x tan 6y
  76. Pre Cal

    cos 75 deg
  77. Physics

    AM radio signals are broadcast at frequencies between 540 kHz and 1585 kHz (kilohertz) and travel 3.0 X 10^8 m/s. a. What is the range of the wavelengths for the signals? (from shortest to longest). b. FM frequencies range between 88MHz and 108 MHz
  78. physics

    The speed of sound in water is 1498 m/s. A sonar signal is sent straight down from a ship at a point just below the water surface, and 1.95 s later, the reflected signal is detected. How deep is the water?
  79. physics

    The speed of sound in water is 1498 m/s. A sonar signal is sent straight down from a ship at a point just below the water surface, and 1.95 s later, the reflected signal is detected. How deep is the water?
  80. calculus

    Find the volume of the solid S that satisfies the two following conditions. First, the base of S is the elliptical region with boundary curve 9 x2 + 4 y2 = 36, and second, the cross-sections of S perpendicular to the x-axis are isosceles right triangles
  81. physics

    how do scientist know that the chemical elements here on earth are the same as on the planets in space and not some different elements
  82. Astronomy

    Later this year Venus will transit the Sun. Use the known diameter and distance of the Sun and Venus to determine how big the Sun will appear to be in degrees and how big Venus will be in degrees during the transit.
  83. math

    Norman received $60 for working 8 hours. At this rate, how much would receive for working 35 hours?
  84. Computer science

    As a member of the Information Security team at a small college, you have been made the project manager to install an access control system (ACS) in a dormitory. The ACS will automatically unlock the dormitory doors via an electronic proximity reader and
  85. computers

    Your sister owns a small clothing store. During a conversation at a family dinner, she mentions her frustration with having to manually track and reorder high demand items. She would like an automated system but has a very small budget. Write a 4-5 page
  86. math

    .) An architect is building a model of a tennis court for a new client. On the model, the court is 6 inches wide and 13 inches long. An official tennis court is 36 feet wide. What is the length of a tennis court? The architect decides to build a larger
  87. Calculus

    Given the function defined as f(x)=x^3-(3/2)x^2-6x+10 a) Explain why f(x) must have a root between x=-3 and x=-2 b) Write an equation of the line perpendicular to the graph of f at x=0 c) Find the x and y coordinates of the point on the graph of f where
  88. Calculus

    Given the function defined as f(x)=x^3-(3/2)x^2-6x+10 a) Explain why f(x) must have a root between x=-3 and x=-2 b) Write an equation of the line perpendicular to the graph of f at x=0 c) Find the x and y coordinates of the point on the graph of f where
  89. Math

    Jen & Jakie are 33miles apart on a calm lake paddling toward each other. Jen paddles at 4miles per hours, while Jakie paddles at 7miles per hour. How long will it take them to meet?
  90. math

    my equation is y= -x-3. the y-intercept is (0,-3) and the slope is -1. if i were to draw a chart starting from x being -3. would it be like this: (-3,0) (-2,-1) (-1,-2) (0,-3) (1,-4) (2,-5) (3,-6) just want to know if it is correct
  91. chemistry

    What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?
  92. chemistry

    What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?
  93. chemistry

    What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?
  94. chemistry

    What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?
  95. Math

    Determine whether the following statement makes sense or does not make sense, and explain your reasoning: By modeling attitudes of college freshmen from 1969 through 2006, I can make precise predictions about the attitudes of the freshman class of 2020. A)
  96. chemistry

    Potassium cyanide (KCN) reacts with acids to produce the poisonous hydrogen cyanide gas, HCN, according to the reaction below: KCN(aq) + HCl(aq) = HCN(g) + KCl(aq) If a sample of 0.653 g of KCN is placed in an excess of HCl, how much HCN, in grams, is
  97. history

    Who is a current or historical figure that is principled and how? Definition: Able to demonstrate rightness and fairness between others. Able to take responsibility for their actions.
  98. geometry

    If XC = CY then C is the midpoint of XY
  99. Biology

    This is a choose the best answer question: The location of protein synthesis in eukaryotic cells is the a)nucleus. b)cytoplasm. c)plasma membrane. d)Golgi apparatus. d)vacuole. Ok so I know that the sites for protein sythesis are the ribosomes and there
  100. Biology

    This is a choose the best answer question: The location of protein synthesis in eukaryotic cells is the a)nucleus. b)cytoplasm. c)plasma membrane. d)Golgi apparatus. d)vacuole. Ok so I know that the sites for protein sythesis are the ribosomes and there

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