1. Physics

    Determine the normal force for a laundry basket with a mass of 4.7 kg in each of the following situations (a) at rest on a horizontal surface _________ N (b) at rest on a ramp inclined at 12° above the horizontal _______ N (c) at rest on a ramp inclined

    asked by Dakota on October 23, 2012
  2. math

    The company used the average cost formula to determine that the cost of merchandise inventory at december 31 was $65,000. on December 31, it would have cost $80,000 to replace the merchandise inventory, so the following entry was made Dr. Merchandise

    asked by alap on February 18, 2016
  3. Physics

    Determine the center of mass of a raft if a 72kg paddle is 0.81m from the stern and the 48kg paddle is 4.5m from the stern? Neglect the mass of the canoe itself. How far is the center of mass from the stern? Do i use the formula x=(m1x1+m2x2)/M m1=72kg

    asked by Malcom on April 1, 2009
  4. math

    There are 4 seats in each row of a bus except the last row, which has 5 seats. The total number of seats can be written as 5 + r x 4. Determine the number of seats in a bus for each value of r.

    asked by jack on May 4, 2011
  5. pre - CALCULUS

    Use Cramer's rule to determine if the system is inconsistent system or contains dependent equations. 2x + y = 8 6x + 3y = 24 A. system is inconsistent B. system contains dependent equations b ?

    asked by Ciara on April 11, 2015
  6. CHEMISTRY!!

    A student determined the calorimeter constant of the calorimeter. The student added 50.00 mL of cold water to 50.00 mK of heated , distilled water in a styrofoam cup. The initial temp of the cold water was 21,00C and the hot water, 29.15C. The maximum temp

    asked by Sydney on March 3, 2010
  7. Gentics

    Using donor DNA from an E. coli strain of leu+ arg+ trp- you transform a resipient strain that is leu- arg- trp+ and select for leu+. The resulting 100 colonies are then screened for the arg and trp markers and the results are outlined in the table below.

    asked by Jessica on April 14, 2010
  8. College Genetics

    Using donor DNA from an E. coli strain of leu+ arg+ trp- you transform a resipient strain that is leu- arg- trp+ and select for leu+. The resulting 100 colonies are then screened for the arg and trp markers and the results are outlined in the table below.

    asked by Jessica on April 14, 2010
  9. Calculus with Analytical Geometry

    1. A bullet is shot upwards with an initial velocity of 1000 ft/sec from a point 20 ft above groand its height above the ground at time t is given by h(t)=-16t^2 + 1000t + 20. How high will the bullet go and how long will it take the bullet to reach the

    asked by Sherianna on March 4, 2016
  10. Chemistry

    Indicate how each of the following would affect the value of the absorbance (too high, too low, or not effect) of the indicated solution. I really need help. I do not understand these questions! This is from a chemistry activity to determine the unknown

    asked by Sharon on February 28, 2012
  11. geometry

    Using the information about John, Jason, and Julie, can you uniquely determine how they stand with respect to each other? On what basis? Statement 1: John and Jason are standing 12 feet apart. Statement 2: Julie is standing 31º NW of Jason. Statement 3:

    asked by Lydia on July 20, 2011
  12. Electronics

    You are given a bandwidth constraint in the form Fmin=250 MHz, Fmax=500 MHz. To meet the bandwidth constraint, the signal is upsampled by a factor K=4 and interpolated at Fs=1 GHz before going to the analog domain. Question: Determine the Baud rate (in

    asked by tanvir ali on April 17, 2013
  13. Physics

    A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the earth receives a pulse of radio waves. For one

    asked by Mary on March 14, 2007
  14. Physics

    A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field

    asked by Don on April 4, 2013
  15. physics

    a 1.50 kg book is sliding along a rough horizontal surface. At point A it is moving at 3.21 m/s, and at point B it has slowed to 1.25m/s. 1.) How much work was done on the book between A and B? 2.) If -0.750 J of work is done on the book from B to C, how

    asked by Jud on March 5, 2010
  16. Physics

    A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field

    asked by Don on April 4, 2013
  17. Algebra

    Determine whether each sequence is arithmetic or geometric. Find the next three terms. 14, 19, 24, 29, . . . A.geometric, 34, 39, 44 B.arithmetic, 32, 36, 41 C.arithmetic, 34, 39, 44 D.The sequence is neither geometric nor arithmetic. I think this is C...?

    asked by Cassie on March 19, 2013
  18. Linear Programming

    Finco must determine how much investment and debtto undertake during the next year. Each dollar invested reduces the NPV of the company by 10¢, and each dollar of debt increases the NPV by 50¢ (due to deductibility of interest payments). Finco can invest

    asked by ama on May 14, 2012
  19. math 20

    Jeremy has a balance owing of $4000 on his credit card. The credit-card company charges 18.0% annual interest, compounded monthly. 1.) If Jeremy makes payments of $300 every month, how much will he still owe after making 12 payments? 2.)Determine the

    asked by Sandi on October 17, 2010
  20. Chemistry

    0.100 mol of SO2 and 0.100 mol of O2 are introduced in a flask of 1.52 L. When in equilibrium, 203 is found to be 0.0916 mol. Determine kp. 2S03(g) 2SO(g) + O2(g) In order to solve this question 1st I made an ICE table and I got the values 2SO3 2SO + 02 I

    asked by K on May 28, 2011
  21. finance

    Home Builder Supply a retailer in the home improvement industry, currently operate seven retail outlets in GA and SC. Management is contemplating building an eighth retail store across town from its most successful retail outlet. The company already owns

    asked by michella on October 30, 2010
  22. Physics

    A 100kg trolley is being pushed up a rough 30° incline by a constant force. The friction force between the incline and the trolley is 110N. (a) Determine thd value of the constant force that will move the trolley up the incline at a constant velocity of

    asked by Slavh on September 7, 2014
  23. Physics

    A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m . If the star initially rotates at the same rate as

    asked by Viert on December 6, 2015
  24. Math

    The following enrolment figures for 20 schools were collected. 934 923 936 931 924 933 933 937 926 923 934 931 929 934 927 927 932 934 927 940. the difference from an assumed mean were obtained as follows : -2 -2 - 1 1 2 2 2 4 6 6 7 8 8 9 9 9 9 11 12 15

    asked by austin on November 25, 2018
  25. MATHMATHICS

    Aschool community had planned to reduce the number of agrade 10 students per class room by constructing additional class room. however,they constructed 4 less rooms than they planned.as aresult,the number of students per class was 10 more than they

    asked by YAEKOB on December 17, 2015
  26. ALGEBRA

    1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where

    asked by GGIFT on March 23, 2010
  27. ap physics

    A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m . If the star initially rotates at the same rate as

    asked by clara on March 7, 2017
  28. physics

    A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m If the star initially rotates at the same rate as

    asked by clara on March 8, 2017
  29. physics

    On the way from a planet to a moon, astronauts reach a point where that moon’s gravitational pull transitions from being weaker than that of the planet to being stronger than that of the planet. The masses of the planet and the moon are, respectively,

    asked by anonymous on February 16, 2011
  30. MATH HELP

    Determine the annual dividend and the annual yield to the nearest hundredth of a percent. Joyce buys 350 shares of KOW, Inc, that has a high of 42.50 per share and a low of 23.60. Last year the company paid annual dividends of $0.58 per share. (a) What is

    asked by Beth on February 17, 2016
  31. chemistry

    Lead iodide is a relatively insoluble compound. It can dissolve from the solid phase into the aqueous phase with a Keq of 0.00027. If the concentration of lead iodide in the aqueous phase 0.125 M, then: a. we need more information to determine the progress

    asked by danny on February 28, 2015
  32. Chemistry

    CoCl2 is a compound that is blue when it is dehydrated and pink when in its hydrated form. I have seen a solution of CoCl2 used to paint a coloring book type figure (on paper). This is hung outside and gives a blue color when the air is dry and pink color

    asked by DrBob222 on November 16, 2006
  33. Chemistry

    I got 0.907 KJ for ΔHcomb but I don't know if its correct. I also don't know how to write the equation. -------- question: A calorimeter is filled with 10.0 mole of methane gas and an excess of oxygen. When burned, the ignition wire releases 107.2 J of

    asked by Liz on July 16, 2014
  34. Social studies

    How did President Truman guard against communist spies in AmericaK he set up immigration quotas on all people from Eastern Europe be he made all kind meanest related activities illegal in the United States see he ordered the investigation of government

    asked by Nan on February 20, 2019
  35. Chemistry

    When excess NaOH is added to Zn(OH)2, the complex ion Zn(OH)4 2- is formed. Determine the molar solubility of Zn(OH)2 in .10 M NaOH. Compare with the molar solubility of Zn(OH)2 in pure water. I thought I knew how to do this problem, but I'm not getting

    asked by Olivia on November 10, 2013
  36. calclus

    Chemistry teachers love to have different shaped beakers in their classroom (I guess it makes the classroom look for impressive). Different shaped beakers result in different rates the water level rises. Task: Determine the rate in which the water level

    asked by sarah on May 16, 2018
  37. Physics

    A wire is bent into the shape of an planar Archimedean spiral which in polar coordinates is described by the equation r=bθ. The spiral has N=100 turns and outer radius R=10 cm (R is the distance from point O to point T). Note that in the figure below we

    asked by Steven on July 29, 2013
  38. Engineering

    Three CSTRs are used in series. The second reactor has a volume twice that of the first and third reactors. The influent flow has a concentration of 150 mg/l of A, and the flowrate is 380 l/min. The reaction is first order, the rate equation is -dCa/dt=

    asked by Anonymous on October 7, 2018
  39. algbra

    You have a full time job at a clothing store that pays a base rate of $13 per hour, with time-and-a-half for hours over forty in a week. You also earn a 2% commission on your total sales for the pay period. You are paid biweekly. You have determined that

    asked by Anonymous on November 2, 2016
  40. circle inscribed

    --------------- QUESTION FOLLOWS -------------------------- Can someone Please help I definitely do not know how to do this. A)Find x, to find x you need to add the arc measures together and set the expression equal to the total degrees of circle then

    asked by lilman on May 22, 2012
  41. physics

    You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 17 m/s2. After 20 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect

    asked by Danielle on August 9, 2014
  42. accounting

    Davis Company was started on January 1, 2012. During the month of January, Davis earned $4,600 of revenue and incurred $3,000 of expense. Davis closes its books on December 31 of each year. Required a. Determine the balance in the Retained Earnings account

    asked by jessica on September 5, 2012
  43. Accounting

    Davis Company was started on January 1, 2012. During the month of January, Davis earned $4,600 of revenue and incurred $3,000 of expense. Davis closes its books on December 31 of each year. Required a. Determine the balance in the Retained Earnings account

    asked by sammy on January 20, 2017
  44. maths-somebody!anyone help

    An arbitary list of integers both positive and negative is presented to two player,playerA and playerB.with A playing first in there turn,either players is allowed to pick the first or last number from the remaining list,and the number is deleted from the

    asked by dam on May 11, 2016
  45. help please

    An arbitary list of integers both positive and negative is presented to two player,playerA and playerB.with A playing first in there turn,either players is allowed to pick the first or last number from the remaining list,and the number is deleted from the

    asked by dam on May 10, 2016
  46. phy

    (Q1)determine the quantity of heatconducted in 30min through an iron plate2.0cm thick and 0.10m2 in area if the temperature of the two sides are 0c and 20c.the coefficent of thermal conductivity is 50.4j/smc (a)91000000j(b)23000000j(c)41000000j(d)33000000j

    asked by ikye on July 3, 2013
  47. MATH

    An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula. The researchers use videotape to count how many cockroaches are still alive, and how many appear to be in distress, at 10 second

    asked by Jennifer on November 11, 2011
  48. Physics(Please help)

    A person is riding a bicycle, and its wheels have an angular velocity of 26.0 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 17.6 revolutions. (a) How much time does

    asked by Hannah on June 5, 2012
  49. english

    I need help with my one paragraph (8 to 12 sentences in length) assignment. My biggest problem I believe is my topic sentence (which must be the first sentence of the paragraph). Also I need help with transitioning between one of my sentences. The

    asked by rita on February 28, 2012
  50. Fluid Mechanics

    a masonry dam 7m high has a top width of 1.5 metres and bottom width of 5 metres.maximum water level in the dam is 1m below the top of the dam. determine the maximum and minimum pressure intensities at the base when the dam is full. take weight of water as

    asked by Okolo Daniel on May 9, 2011
  51. Language arts

    . This question asks about your work in your reading role. You may use your novel to help you answer the question. Think about the work you completed in your reading role. Determine the ideas that would be most worthy to share in a literary discussion

    asked by jj on June 6, 2016
  52. math

    Mia is stacking copies of a new book in a square-pyramid display by the front window of her bookstore. for each consecutive layer, she places one book where four meet. A. I the bottom row of the display has 144 books and there is one book on the top,

    asked by Vivian on March 14, 2012
  53. Unisa

    Flow chart of an if-then-else statement Sam works at a coffee company where all the employees receive a bonus of R700, except the employees in the coffee department 3, who receive a bonus of R850. Enter his gross salary and his personal department number.

    asked by Mako on April 2, 2015
  54. physics

    The acceleration due to gravity near a planet's surface is known to be 3.20 . Part A If the escape speed from the planet is 9.54 , determine its radius. Part B Find the mass of the planet. Part C If a probe is launched from its surface with a speed twice

    asked by sammy on September 29, 2012
  55. Thermodynamics

    A combined seperating and throttling calorimeter was used to determined the dryness fraction of steam flowing through a steam main at a pressure of 900kPa. The pressure and temperature after throttling were 100kPa and 110C respectively. The mass of water

    asked by Kay on December 7, 2010
  56. Math

    The market trades in three fixed-income securities: A, B, and C. Security A is a 2-year bond paying 40 at date 1 and 80 at date 2. Security B is a 1-year bond paying 50 at date 1. Security C pays 30 at date 1 and 40 at date 2. Prices are pa=100, pb=45 and

    asked by Lou on October 28, 2011
  57. Statistics

    a Rollercoaster's auditors estimate that the average daily loss from those illegally riding without tickets is at lease (greater or equal) $295, but wants to determine the accuracy of this statistic. The company researcher takes a random sample of losses

    asked by Calyssa on November 5, 2014
  58. math

    if someone could please help that would be muchly appreciated. A group of mountain climbers are using trigonometry to find the height of a mountain located in the rockies. From point A, which is due west of the mountain, the angle of elevation to the top

    asked by deborah on April 3, 2010
  59. composite functions

    f(x)=2x-4, g(x)=x squared + 5x What is F o G and Domain Okay, we are given f and g as functions of x. To compose a function means to use one function, g in this case, as the argument of the other, f in this case. Thus we want f o g = f(g(x)) With f(x) =

    asked by Anonymous on July 6, 2006
  60. Math - trig

    Determine the general solution of 8 cos^2x - 4cosx - 1 =0 (8cos^2x - 4cosx)/8 =1/8 cos^2x - 4cosx=1/8 cos^2x/cosx =1+4cosx/cosx cosx = 5 x = cos^-1(5) x = error

    asked by Bontle on July 26, 2014
  61. Math

    g(x)=(x^2+2x+1)/(x^2-x-6) 1. Find any holes in the graph of g(x) 2. Find any horizontal or oblique asymptote for the graph. 3. Determine where (if any at all) the graph of g(x) crosses the horizontal or oblique asymptote.

    asked by hiroko on November 28, 2013
  62. Another niology/science question

    In tomatoes, red fruit is dominant to yellow fruit color. A farmer has plants that produce either red or yellow tomatoes. he has signed a contract with a large seed company to provide pure red dees and pure yellow seeds. the do not want hybrids. How can

    asked by Kellie on October 15, 2007
  63. biology

    In tomatoes, red fruit is dominant to yellow fruit color. A farmer has plants that produce either red or yellow tomatoes. he has signed a contract with a large seed company to provide pure red dees and pure yellow seeds. the do not want hybrids. How can

    asked by kelly on October 15, 2007
  64. science

    Donelle measures the mass of 10 pennies and records her measurements in kilograms. She wants to determine the mean mass of her pennies. What should Donelle do to make it easier to calculate the mean mass of her pennies? Use a computer to perform the mean

    asked by dianni on November 6, 2018
  65. Physics

    A box of unknown mass is sliding with an initial speed vi = 5.40 m/s across a horizontal friction-less warehouse floor when it encounters a rough section of flooring d = 3.50 m long. The coefficient of kinetic friction between the rough section of flooring

    asked by Anonymous on December 17, 2015
  66. Algebra

    Hi, I am not the best at math could someone plz help me thank you... 4. Use a graph to determine if the exponential function g( x) = -6 * 5^x is positive or negative and increasing or decreasing. (A) positive, increasing (B) positive, decreasing (C)

    asked by Help Me Plz on February 5, 2019
  67. physics

    Азота массой м=14 г сжимают изотермически при температуре T=300 К от давления p₁=100 кПа до давления p₂=500 кПа. Определить: 1) изменение внутреиней

    asked by lisa on May 29, 2011
  68. Chemistry

    Tungsten trioxide (WO3) has a rich yellow color and is often used as a pigment in ceramics and paints. In order to test a ceramic vase for its WO3 content, a 10.20 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO3 to W3 . The

    asked by Cassie on March 25, 2015
  69. Chemistry

    The vapor pressure of an unknown substance is given at various temperatures. properties of the substance are: density of solid=1.375g/ml density of liquid= 1.150g/ml. freezing point= 275.0K boiling point=375.0 K How would i calculate the vapor pressure at

    asked by Gifty Ansah on February 7, 2012
  70. physics

    A firework whose mass is 7kg is launched vertically up into the air. After it reaches its the height of 160m, it blasts and splits into two pieces; pieces A and B. The two pieces fly off and travel horizontally. The blasts of the fireworks lasts 10ms.

    asked by riley on July 4, 2017
  71. Math 156

    Determine whether the sets are equal only, equivalent only, both equal and equivalent, or neither equal nor equivalent {3,15} and { 3, 1,5}

    asked by Anonymous on October 3, 2009
  72. CALCULUS

    i needed help on some problems and clarification on one. 1. Determine the location and type (removable, jump, infinite, or other) of all discontinuities of the function (x^2-3x+2)/(x^2-1) this section has been confusing for me for some reason, can any one

    asked by Important on September 30, 2010
  73. Trig

    A ship is headed directly toward a coastline formed by a vertical cliff (segment BC) that is 80 meters high. At point A, from the ship, the measure of the angle of elevation to the top of the cliff (B) is 10°. A few minutes later, at point D, the measure

    asked by Amanda on April 12, 2010
  74. physics

    A 13 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1°C. A 10 percent of heat lost by water is

    asked by Ehab on March 14, 2016
  75. Physics

    An electric force moves a charge of +1.40 x 10^-4 C from point A to point B and performs 4.70 x 10^-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two points? ____________J

    asked by Mary on September 3, 2007
  76. Last math problem help

    Mr. Jarvis invested a total of 10,437 in two savings accounts. One account earns 8% simple interest per year and the other earns 9% simple interest per year. Last year the two investments earned a total of $849.52 in interest. Write a syste of equations to

    asked by Taylor on February 17, 2014
  77. physics 2

    A 12.9 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1°C. A 10 percent of heat lost by water is

    asked by Ehab on March 15, 2016
  78. physics 2

    A 12.9 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1°C. A 10 percent of heat lost by water is

    asked by Ehab on March 15, 2016
  79. Chemistry

    10.1g of potassium nitrate were dissolved in 50cm^3 of water. the temperature fell by 16 degrees celsius. Determine (a) the number of moles of potassium nitrate dissolve in 50cm^3 of water. (b) heat change that would be produced if one mole of potassium

    asked by Jessica on March 25, 2014
  80. Mathematics

    Perfume is sold in two different sizes of bottle The 80ml bottle is priced at £55 The 50ml bottle is usually priced at £45, but is on special offer If you buy one 50ml bottle of perfume, you get a second for half price By calculating the price per ml

    asked by Joseph on November 11, 2017
  81. chemistry

    19 mL of 0.50 mool/L NaOH which is standardized becomes titrated alongside 24 mL of 0.44 mol/L acetic acid. Determine the pH of the solution Please judge my work: Becasue NaOH and acetic acid react in a 1:1 ratio, initital moles of acetic acid =0.0019 L x

    asked by Joseph on April 9, 2008
  82. chemistry-confirm please

    Only a chemist can be trusted with the combination to the safe containing a ton of money. The combination is the pH of solution A, followed by the pH of solution C. (for example: is the pH of solution A is 3.47 and the pH of solution C is 8.15 the

    asked by Tom on May 25, 2008
  83. Geography

    What soil factors influence type of vegetation in a region? I am confused, so I provided two answers. I am uncertain of which one is correct, though. My answer #1: Soil, temperature, and moisture influence the type of vegetation that thrives naturally in a

    asked by Anonymous on September 2, 2013
  84. Science (Physics)

    A red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 220 m. If the red car has a constant velocity of +20 km/h,

    asked by Jeff on September 3, 2009
  85. math

    Create a quadratic polynomial function f(x) and a linear binomial in the form (x − a). Part 1. Show all work using long division to divide your polynomial by the binomial. Part 2. Show all work to evaluate f(a) using the function you created. Part 3. Use

    asked by ted on June 9, 2016
  86. Pre - Cal

    ) The main cables of a suspension bridge are 20 meters above the road at the towers and 4 meters above the road at the center. The road is 80 meters long. Vertical cables are spaced every 10 meters. The main cables hang in the shape of a parabola. Find the

    asked by Nina moreland on December 9, 2015
  87. Chemistry

    Which of the following statements about isotopes is/are true? a. Because isotopes have different numbers of neutrons, they have different mass numbers. b. because neutrons determine an atom's chemical properties, isotopes of the same element are very

    asked by Aleksandra on September 2, 2015
  88. Calculus (Partial Derivatives)

    Using x hours of skilled labor and y hours of unskilled labor, a manufacturer can produce Q(x,y)=40xy1/5 units each week. Currently 20 hours of skilled labor and 243 hours of unskilled labor are being used. Suppose the manufacturer reduces the skilled

    asked by Bill on February 28, 2015
  89. microsoft word

    In Microsoft Word, how can I get words to slant at an angle across the page? Also, when typing business letters do you start 2" down on the page? you can either use the word art and create word are that is going down the page, or you could create a text

    asked by anonymous on October 19, 2006
  90. physics

    A 5.3-kg block is pushed 2.3 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of θ = 30° with the horizontal, as shown in the figure below. If the coefficient of kinetic friction between block and wall is

    asked by sherry on March 2, 2016
  91. Physics

    Two massless springs (S1 and S2) are arranged such that one hangs vertically downward and the other is vertically upward, as shown in figure (a). When a 0.275-kg mass is suspended from S1, it stretches by an amount Δx1 = 0.062 m, as shown in figure (b).

    asked by Anonymous on October 23, 2014
  92. physics

    A 10.0-kg cylinder rolls without slipping on a rough surface. At the instant its center of amss has a speed of 10m/s, determine (a) the translational kinetic of its center of mass (b) the rotational kinetic energy about its center of mass and (c) its total

    asked by cyndi on January 29, 2007
  93. physics

    Question Part Points Submissions Used 1 2 3 4 5 –/5 –/5 0/5 –/5 2/2 0/10 0/10 1/10 0/10 2/10 Total 2/22 A block of mass m = 2.00 kg is released from rest at h = 0.400 m from the surface of a table, at the top of a θ = 35.0° incline as shown below.

    asked by carlton on October 19, 2011
  94. Chemistry

    An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you titrate a sample of the solid with NaOH. The appropriate reactions are as follows: Citric acid: H3C6H5O7 (aq) + 3NaOH (aq) -> 3H2O (l) + Na3C6H5O7 (aq)

    asked by Sarah on May 7, 2013
  95. calculus

    8). Part 1 of 2: In the solid the base is a circle x^2+y^2=16 and the cross-section perpendicular to the y-axis is a square. Set up a definite integral expressing the volume of the solid. Answer choices: integral from -4 to 4 of 4(16-y^2)dy, integral from

    asked by Sally on April 14, 2013
  96. math-probability

    Mary has 3 boxes with Marbles. Eavh box is labeled so that she knows what is in each box. She has 1 box with 2 blue marbles, another box with 2 red marbles and a 3rd box with 1 red and 1 blue marble. Mary's little sister removed all the labels and she

    asked by ASh on March 4, 2008
  97. physics electricity

    An electric force moves a charge of +1.65 multiplied by 10-4 C from point A to point B and performs 6.40 multiplied by 10-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two

    asked by alex on January 3, 2010
  98. Physics

    A baton twirler tosses a baton into the air with an initial angular velocity of 2 rev/s (revolutions per second). The baton undergoes a constant angular acceleration of -.015 rev/s^2 while in the air, and its angular velocity when she catches it is .8

    asked by Brian on November 7, 2013
  99. math-probability

    Mary has 3 boxes with Marbles. Eavh box is labeled so that she knows what is in each box. She has 1 box with 2 blue marbles, another box with 2 red marbles and a 3rd box with 1 red and 1 blue marble. Mary's little sister removed all the labels and she

    asked by ASh on March 4, 2008
  100. math

    Determine whether the following argument is correct. If it's not correct, explain what is wrong with ther argument and change the minor premise to make a correct argument. If a triangle is equilateral, then it has three equal sides. Triangle ABC doesn't

    asked by kai on December 11, 2012

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