1. chemistry

    a very small gas bubble seen in a microscope has a diameter of 1 micrometer. If the pressure is one bar and the temperature is 25 degrees celsius calculate the number of gas molecules in the bubble

    asked by emoni on January 22, 2011
  2. physics

    An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air?

    asked by mike on April 26, 2008
  3. physics

    0.50 L of water at 16°C is poured into an aluminum ice cube tray of mass 0.250 kg at the same temperature. How much energy must be removed from this system by the refrigerator to turn the water into ice at -8°C?

    asked by jan on February 3, 2016
  4. san jac

    a sample of nitrogen gas contain 5.0mol in a volume of 3.5L calculate the new volume of the container if the pressure and temperature are kept constant but the number of moles of nitrogen is change to 2.5 mol

    asked by Anonymous on April 20, 2015
  5. algebra

    a metal stays solid a fahrenheit temperature below 1756.7 degrees. determine (in terms of an inequality) Celsius temperatures for which the metals stays solid. use formula F=9/5C +32.

    asked by norma on December 3, 2010
  6. chemistry

    If 51.6 mL of ethanol (density = 0.789 g/mL) initially at 6.4°C is mixed with 48.9 mL of water (density = 1.0 g/mL) initially at 29.1°C in an insulated beaker, and assuming that no heat is lost, what is the final temperature of the mixture?

    asked by MK on October 15, 2013
  7. chemistry

    A 100 g sample of a liquid with a specific heat of 2 J/g · C absorbs 4000 J of heat energy. If the sample started at 30 ◦ C , what is the final temperature? No phase change took place.

    asked by mike on December 17, 2012
  8. Physics

    An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air? g

    asked by Pierre on April 19, 2008
  9. chemistry

    A 100.0 gram sample of iron at 80.0 degrees Celsius was placed in 150 grams of water at 20.5 degrees Celsius. What was the final temperature when thermal equilibrium was reached?

    asked by tom on January 31, 2012
  10. Chemistry

    The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at a temperature of 25 C and a total pressure of 760 torr . what is the partial pressure of the gas?

    asked by Zoe on April 16, 2010
  11. Chemistry

    What is the final temperature and physical state of water when 250 grams of water at 85 degrees C is added to 80.0 grams of ice at -15 degree C? Is Tf= 109 C? Is it in the steam phase?

    asked by Student on February 24, 2016
  12. ALGEBRA

    NEED TO WRITE AN EXPRESSION AND SOLVE AN AIRPLANE LEFT CHGO WHRE THE TEMP WAS 42 FAREHEIGHT . WHEN IT LANDED ANCHORAGE THE TEMP WAS 60 DEGREE LOWER WHAT WAS THE TEMPERATURE IN ANCHORAGE? 60 - 42 = WOULD IT BE 42 + (-60) = -18

    asked by MARKO on September 14, 2011
  13. chemistry

    find the temperature increase in C expected for 1.00 L of water when it absorbs all of the energy from the combustion of 1.00 g of acetylene, C2H2(g). (Every mole of acetylene releases 1300KJ of energy when combusted)

    asked by Ade on November 2, 2014
  14. chemistry

    determine the number of grams of Ne gas that must be added to a container in order for the volume to increase to 38.2 L at constant pressure and temperature if the container had an initial volume of 25.0 L and 2.0 moles of Ne

    asked by j on December 5, 2017
  15. Physics

    Estimate how many molecules of air are in each 2.5 L breath you take that were also in the last breath Einstein took (assumed to be the same volume). (Hint: Assume the atmosphere is about 11 km high and of constant density. Take the temperature of the air

    asked by Anonymous on November 29, 2012
  16. Physics

    Estimate how many molecules of air are in each 2.5 L breath you take that were also in the last breath Einstein took (assumed to be the same volume). (Hint: Assume the atmosphere is about 11 km high and of constant density. Take the temperature of the air

    asked by Anonymous on November 29, 2012
  17. chem

    Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Q=M*C*delta T 65g*4.184*(65-32) 89.7 J

    asked by jb on January 31, 2016
  18. science

    A Molecule of H2 Can travel an average distance of 92 nm before it collides with another H2 molecule in a 2.09 L container that has 0.87 mol of H2 (g) with a total pressure of 0.98 atm. What is the temperature of the container in K? Assume the diameter of

    asked by T.Asadi on June 21, 2015
  19. Physics

    A 100 gram mass of metal at 106°C is placed in 100 grams of cool water at 22°C. The final temperature of the mixture is 25°C. What is the specific heat capacity of the metal?

    asked by Kat on February 24, 2017
  20. Astronomy

    The star Polaris has a surface temperature of roughly 6500 K and a radius of approximately 50 solar radii. Find the luminosity of Polaris in terms of the Sun's luminosity.

    asked by qwerty on June 24, 2014
  21. Gen Chem 1

    We want to change the volume of a fixed amount of gas from 745mL to 2.30L while holding the temperature constant. To what value must we change the pressure if the initial pressure is 102 kPa?

    asked by Kay on October 26, 2010
  22. Chemistry

    How many moles of oxygen gas must be in a 12.2 L container to exert a pressure of 0.877 atm at a temperature of 35.0°C (the ideal gas constant in this case is 0.0821 L atm / mole K)?

    asked by Sam on February 19, 2019
  23. Chemistry

    Oxygen gas, from the decomposition of KClO3, was collected by water displacement. The pressure and temperature in the lab during the experiment were 451.0 torr and 20.0 C. What was the partial pressure of oxygen?

    asked by Austin on March 18, 2014
  24. Chemistry

    A 34.6 g block of metal at 2.1oC is dropped into 100.0 g of water at 97.3oC. If the specific heat of the metal is 0.084 cal/goC, what will the final temperature of the water be?

    asked by Kat on April 24, 2011
  25. chemistry

    A piston is used to compress a gas from 1.0 atm to 3.5 atm. If ther volume changes from 1.5L to 0.75L, what is the final temperature, if it started at 300k? 1050K 700K 525K 300K

    asked by Mario on November 25, 2011
  26. Chemistry

    The pressure exerted on a 240.0 mL sample of hydrogen gas at constant temperature is increased from 0.428 atm to 0.724 atm. What will the final volume of the sample be?

    asked by NDC on March 6, 2011
  27. chemistry

    A 24L sample of a gas at fixed mass and constant temperature exerts a pressure of 3.0 atm. What pressure will the gas exert if the volume is changed to 16L?

    asked by catherine on March 16, 2010
  28. Chemistry

    A quantity N2 of occupies a volume of 1.4L at 290K and 1.5atm . The gas expands to a volume of 3.1 L as the result of a change in both temperature and pressure. I have the find the density of the gas at these new conditions?

    asked by Kate on November 20, 2010
  29. physics

    An ideally efficient freezer cools food to 260 K. If the room temperature is 300K, how much work does the freezer consume when removing 100J heat from the food?

    asked by garnel on April 8, 2013
  30. science

    This graph represents the relationship of the pressure and volume of a given mass of a gas at constant temperature. When the pressure equals 8 millimeters of mercury (mmHg), what is the volume, in milliliters (mL)?

    asked by Anonymous on February 8, 2012
  31. chemistry

    Which of the following is an example of quantization? A. The amount of time spent in a classroom B. The number of students in a classroom C. Learning happening in a classroom D. The temperature range in a classroom I strongly believe the answer is A. Any

    asked by Morgan on December 14, 2014
  32. Chemistry

    What is the mass, in grams, of a sample of solid zinc if its temperature changes from 25.7oC to 39.0oC when it absorbs 123 J of heat energy? Specific heat of zinc = 0.388 J/(g oC)

    asked by Mindy on July 21, 2015
  33. chemistry

    25.0 mL of ethanol (density = 0.789 g/mL) initially at 5.5°C is mixed with 32.3 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?

    asked by Anonymous on September 19, 2014
  34. chemistry

    A sample of solid sulfur is heated with an electrical coil. If 105 joules of energy is added to a 12.4 gram sample initially at 24.4°C, what is the final temperature of the sulfur?

    asked by sheila on April 8, 2013
  35. chemistry

    A certain substance has a heat vaporization of 47.97 kJ/mol. At what Kelvin temperature will the vapor pressure be 7.50 times higher than it was at 297K? Please help me! I don't understand heat vaporization questions

    asked by Angela on January 23, 2012
  36. physics

    got 22 degrees celsius for the last answer from Damon. Another question is ......How much heat is needed to raise the temperature of a 500g object with specific heat capacity 0.5 cal/g c by 25 degrees?

    asked by tony on June 17, 2012
  37. Chemistry

    The temperature of a 12.58g sample of calcium carbonate increases from 23.6degrees celcius to 38.2 degrees celcius. If the heat capacity is 0.82J/g-K, how many Joules of heat are absorbed

    asked by Tommy on June 18, 2013
  38. Chemistry

    Do you understand what they are asking? Which of the following physical properties can be used to measure temperature using a thermometer? volume pressure density viscosity Im guessing they are talking about viscosity but I don't quite fully understand it

    asked by Jamie on May 5, 2008
  39. Physics

    A person eats a container of yogurt. The Nutritional Facts label states that it contains 195 Calories (1 Calorie = 4186 J). What mass of perspiration would one have to lose to get rid of this energy? At body temperature, the latent heat of vaporizaiton of

    asked by Jenny on April 5, 2008
  40. chemistry please help

    the enthalpy change when a strong acid is neutralized by base is -56.1 kJ/mol. If 135 ml of .450 M HI at 23.15 C is mixed with 145 of .500 M NaOH at 23.15 C What will the max temperature reached by the resulting solution? tamana: Assume the specific heat

    asked by Jazmin on October 17, 2010
  41. Chemistry

    When zinc, iron and lead are reacted with hydrochloric acid the variable most easily measured in order to determine the effect of the chemical nature of the reactants on reaction rate is a)temperature b)colour c)surface area d)volume of gas e)concentration

    asked by Bob on July 24, 2010
  42. Physics

    A person eats a container of yogurt. The Nutritional Facts label states that it contains 195 Calories (1 Calorie = 4186 J). What mass of perspiration would one have to lose to get rid of this energy? At body temperature, the latent heat of vaporizaiton of

    asked by Mitch on April 6, 2008
  43. Physics

    A person eats a container of yogurt. The Nutritional Facts label states that it contains 195 Calories (1 Calorie = 4186 J). What mass of perspiration would one have to lose to get rid of this energy? At body temperature, the latent heat of vaporizaiton of

    asked by Thomas on April 6, 2008
  44. Science

    1. A(n)_____ is a material that permits the transfer of heat. A(n)____is a meterial that does not permit the flow of heat.* 1 point A: Insulator, Conductor B: Conductor, Electric Field C: Insulator, Electric Field D: Conductor, Insulator 2. The image below

    asked by Cardi B on March 20, 2019
  45. math

    Half of Sarah's wire is equal to 2/5 of Daniels. Chris has 3 times as much as Sarah. In all, their wire measures 6 ft. How long is Sarah's wire in feet?

    asked by mary on May 27, 2015
  46. Geometry

    A 20 foot ladder is leaning aagainst a wall the base of the ladder is 7 feet away from the.wall hkw high up the wall will the ladder reacb

    asked by Alyssa on March 11, 2013
  47. Geometry

    A 20 foot ladder is leaning aagainst a wall the base of the ladder is 7 feet away from the.wall hkw high up the wall will the ladder reacb

    asked by Alyssa on March 11, 2013
  48. plane and spherical trigonometry

    a ladder 38 feet long is leaning against the side of a wall. if the angle between the ladder and the wall is 54 (degrees) approximately how far is the bottom of the ladder from the wall?

    asked by mhonic on July 8, 2013
  49. math

    Which strategies can be used to solve this problem? The candle factory made 1,200 candles per month in June and July and 1,345 candles per month in August and September. What is the total number of candles they made in four months? Choose all answers that

    asked by April lanneau on March 8, 2019
  50. Physics

    How do you solve this problem? A ball on the end of a string is revolved at a uniform rate in a vertical circle radius of 72.0 cm, as shown in figure. If its speed is 4.00m/s and its mass is .300 kg. Calculate the tension in the string when the ball is a)

    asked by Emily Grossman on February 21, 2011
  51. Chemistry

    use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l) The reductions

    asked by Rachel on April 28, 2016
  52. college physics

    I don't know where to begin with this question. Could someone help me please? A rod of mass 4.1 kg and length 1.6 m hangs from a hinge as shown in the figure below. The end of the rod is then given a "kick" so that it is moving at a speed of 5 m/s. How

    asked by peter on December 2, 2011
  53. Physics

    A novice golfer on the green takes three strokes to sink the ball. The successive displacements of the ball are d1 = 4.00 m to the north, d2 = 1.90 m northeast, and d3 = 1.00 m at θ = 30.0° west of south (figure below). Starting at the same initial

    asked by Terio on September 23, 2013
  54. Physics

    A novice golfer on the green takes three strokes to sink the ball. The successive displacements of the ball are d1 = 3.96 m to the north, d2 = 2.06 m northeast, and d3 = 1.13 m at 30.0° west of south (see the figure). Starting at the same initial point,

    asked by <3 on September 15, 2013
  55. medical billing and coding from Penn Foster

    Writeacher, thank you for checking it out. I thought MLA would be easier for me since ive been out of school 15 yrs now. I can do either APA or MLA. I guess with the websites ,I still don't understand the differences, some of the sentences were from

    asked by Shannon on June 25, 2009
  56. physics

    A novice golfer on the green takes three strokes to sink the ball. The successive displacements of the ball are d1 = 3.98 m to the north, d2 = 2.01 m northeast, and d3 = 1.12 m at 30.0° west of south (see the figure). Starting at the same initial point,

    asked by Jackie on September 26, 2013
  57. physics

    A novice golfer on the green takes three strokes to sink the ball. The successive displacements of the ball are d1 = 3.95 m to the north, d2 = 1.91 m northeast, and d3 = 1.16 m at 30.0° west of south (see the figure). Starting at the same initial point,

    asked by Anonymous on September 27, 2013
  58. Physics

    A novice golfer on the green takes three strokes to sink the ball. The successive displacements of the ball are d1 = 3.98 m to the north, d2 = 2.01 m northeast, and d3 = 1.12 m at 30.0° west of south (see the figure). Starting at the same initial point,

    asked by Jackie on September 25, 2013
  59. Math

    Help lesson 10 tools of geometry help been on to 1 hour plz help!no pics 1.what is the Vaule of x in the diagram shown below 2.which term correct ly describes the figure shown below 3.which statement is true 4.which is rhe best description of triangles ABC

    asked by Cooldude on February 27, 2018
  60. physic angular momentum and torque

    What is the angular momentum of a figure skater spinning at 2.7rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.6m , a radius of 14cm , and a mass of 50kg How much torque is required to slow her to a stop in

    asked by sammy on March 29, 2014
  61. LITERATURE

    Stripped of its summer wealth can the bough be wan as a root go dingy in spells of frost untrimmed of its bird its fruit? no- trees go wild at the thougt they know what they meant to do wild trees, gone out of your head do you burn to go sout too? what is

    asked by sam on December 2, 2007
  62. Chemistry

    Calculate the [H3O+] and pH of each polyprotic acid solution. (b) 0.116 M H3C6H5O7 I did part (a) just fine, but for some reason can't figure (b) out. Can someone help me with just the [H3O+] part to get me started? I already got 9.3e-3 and 1.4e-3 without

    asked by DeeDee on April 6, 2013
  63. physics

    Two blocks of mass m1 = 1.2 kg and m2 = 1.7 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.45. Calculate the speed of the blocks

    asked by anonymous on December 11, 2007
  64. about this site please read

    im trying to post something but it says I cant because youre not allowed to post internet addresses but I don't have any in my post please help. You likely have a www in the text. nope read it over and over .is that the only thing it could be because I

    asked by Jon on April 24, 2007
  65. math (Gaussian n! formula)

    I'm trying to figure out the generalized form of the Gaussian n-factorial (n!) formula. I keep seeing n!= n(n+1)/2 but that's not working. For example: 5!= 120 but 5(6)/2 or 6(5/2) is 15; a far cry from 120. I don't understand what I'm doing wrong;

    asked by John on October 2, 2010
  66. Physics

    A figure skater spins on the ice, holding two weights a distance d from the axis about which he is rotating.  At a certain time, he pulls these weights toward his body as shown, causing his rotational inertia to decrease by a factor of 2.  How does this

    asked by John on March 19, 2011
  67. Physics

    Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 402 N and F2 = 364 N. (Assume up and to the right as positive directions.)(F1 is 10degrees and F2 is 30degrees) (a) What is the resultant of these two

    asked by Dani on May 3, 2011
  68. physics

    In the figure below, a square of edge length s is formed by four spheres of masses, m1, m2, m3, and m4. What is the x-component and the y-component of the net gravitational force from them on a central sphere of mass m5. State your answers in terms of the

    asked by brookel on April 11, 2013
  69. Precalculus

    From a rectangular piece of cardboard having dimensions a × b, where a = 40 inches and b = 70 inches, an open box is to be made by cutting out an identical square of area x2 from each corner and turning up the sides (see the figure). Express the volume V

    asked by Jim on March 7, 2012
  70. Science

    I am working on a year 10 physics assignment on road science. I am trying to figure out the reaction distance of a car with: Skid marks = 24m Reaction time = 1 sec Decelaration rate = 6m/sec I have many formulas in my book and am unsure of which one to use

    asked by Melody on May 16, 2008
  71. Physics

    A velodrome is built for use in the Olympics (see the figure below). The radius of curvature of the surface is 15.9 m. At what angel should the surface be banked for cyclists moving at 15.0 m/s? Choose an angle so that no frictional force is needed to keep

    asked by Emily on September 30, 2014
  72. College Physics

    A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 220 J from 460 J. How high does she rise during this interval? Neglect air resistance. The quarter is over but

    asked by Angela on March 15, 2012
  73. physics

    In the Atwood machine shown in Figure 5.14a, m1 = 2.00 kg and m2 = 8.00 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp

    asked by Janice on October 21, 2015
  74. Statistics

    In a random sample of 508 judges, it was found that 281 were introverts. Let p represent the proportion of all judges who are introverts. Find a point estimate for p. Round your answer to four decimal places. I am needing assitance in trying to figure out

    asked by Jacob on June 17, 2010
  75. physics

    Two small beads having positive charges q1 = 34.0 nC and q2 = 55.0 nC are fixed so that the centers of the two beads are separated by a distance d = 0.450 m as shown in the figure. At what position x relative to q1 could you place a third small bead of

    asked by Linda on January 20, 2015
  76. Chemistry

    An unknown gaseous hydrocarbon contains 85.63 % carbon. If its density is 0.488 g/L at 0.355 atm and 100°C, what is the molecular formula of the gas? I can't figure this out. By assuming the total mass to be 100g, I get 85.63g C and 14.37g H which I then

    asked by Michael on March 18, 2015
  77. algebra

    A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below. 35 said they drove alone. 38 rode in a carpool. 33 rode public transportation. 5 used both carpools and public transportation. 4 used both a

    asked by matt on November 19, 2011
  78. More Calc

    There is a ditch that is 18 feet deep at its deepest point. A rock is dropped from the rim above the deepest point. a. Write the height of the rock as a function of t in seconds. b. How long will it take for the rock to hit the ditch floor. We want a

    asked by Tezuka on October 7, 2006
  79. CHEMISTRY...........

    1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? My answer: (0.961 atm)(29.0 L) (413k) all divided by (413)(0.961 atm)=29.0 L CO2

    asked by Anonymous on October 11, 2013
  80. AP US History

    I am writing an APUSH DBQ and I have what I think is a pretty winning thesis but I am having problems coming up with a good, interesting opening sentence. I figure once I have the first paragraph figured out the rest will flow rather easily. I also need to

    asked by Tay on October 22, 2011
  81. math

    if i am trying to figure out the perimeter of a triangle and one side is 3 and the other side is 4 what would the other side be?

    asked by corrie on April 23, 2010
  82. Physics

    A stone is aimed at a cliff of height h with an initial speed of 62 m/s directed 45° above the horizontal, as shown in the Figure below. The stone strikes at A, 6.56 s after launching. What is the height of the cliff? Can someone please tell me which

    asked by Lindsay on November 6, 2007
  83. Math

    There are 4 queens in a standard deck of 52 cards. You pick one card at random. What is the probability of not picking a queen? This one is a bit confusing. 4/52=1/13 is the probability of picking a queen. I am not sure how to figure this one out.

    asked by Patrick on March 27, 2018
  84. hardware

    What is the maximum frequency output for a square wave from the HP 33120A Waveform Generator? I found the HP 33120A Waveform Generator on the Agilent website but I'm not sure how to figure out the problem.

    asked by Shawn on July 10, 2010
  85. math

    A snow cone has {1} line of symmetry. A slide of a figure along a straight line- my answer: translation an object moved to the right and up- my answer: diagonal translation are these correct?? I would appreciate any and all help Thank You.

    asked by running.from.myself on February 28, 2012
  86. university of redlands

    Two blocks connected by a string are on a horizontal frictionless surface. The blocks are connected to a hanging weight by means of a string that passes over a pulley as shown in the figure below, where m1 = 1.85 kg, m2 = 2.80 kg, and m3 = 5.05 kg.

    asked by Anonymous on September 24, 2012
  87. Physics

    A stone is aimed at a cliff of height h with an initial speed of v = 56.0 m/s directed 65.0° above the horizontal, as shown in the Figure below by the arrow. The stone strikes at A, 9.20 s after launching. What is the height of the cliff?

    asked by steeve on November 14, 2013
  88. chem

    What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the isomerization? Energy required to break pi bond is 4.42*10^-19. wavelenght=c/f but how do i figure out what f is?

    asked by tomi on November 12, 2008
  89. physics

    Piston circled 1 in the figure below has a diameter of 0.28 in.; Piston circled 2 has a diameter of 1.6 in. In the absence of friction, determine the force vector F necessary to support the 500-lb weight. in lb i got 1.53 lb but it is incorrect

    asked by anna on April 10, 2016
  90. chem

    What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the isomerization? Energy required to break pi bond is 4.42*10^-19. wavelenght=c/f but how do i figure out what f is?

    asked by tomi on November 12, 2008
  91. Algebra 1

    The architect must factor several trinomials the are of the form x2- mx + n, where m & n are whole numbers greater than zero. She wonders if any of these trinomials factor as (x+a)(x+b), where a > 0 and b < 0. Is this possible? Why or why not? I do not

    asked by Miss Jamie on June 2, 2014
  92. English

    Is the usage of me and I correct in the following sentences? If not, what would be the correct way to say these sentences? 1. I wish I had known about these picture board systems then, as it may have enhanced the communication between the children and me.

    asked by Anonymous on June 29, 2014
  93. physics

    Two particles of mass m1 = 1.0 kg and m2 = 2.6 kg are traveling with velocities v1 = 4.9, and v2 = 2.5 as shown in the figure below. What is the total momentum of this system? Be sure to give the magnitude and direction of the momentum. magnitude 1 kg ·

    asked by cody on November 10, 2010
  94. physics question

    A skateboarder at a skate park rides along the path shown in (Figure 1) .a=2.7 m and b=1.0m Part A If the speed of the skateboarder at point A is v=1.6m/s, what is her speed at point B? Assume that friction is negligible.

    asked by ana on April 9, 2017
  95. physics

    Two particles of mass m1 = 1.0 kg and m2 = 2.6 kg are traveling with velocities v1 = 4.9, and v2 = 2.5 as shown in the figure below. What is the total momentum of this system? Be sure to give the magnitude and direction of the momentum. magnitude 1 kg ·

    asked by cody on November 9, 2010
  96. geometry

    figure of kite top pointed left. Tail is point E. Segment from AB perpendicular to CD. Top side of kite is AC, bottom side is CB. I figured it ==== AC 9y-6 = 7y; I got 3 for y. So, C = 21; for (x) I got 5x+18=5x + 15 (x) = 3. So AD IS 9. AE is 5x+6y=

    asked by miranda on April 16, 2015
  97. Physics

    Suppose that the swimmer in the figure below has a swimming speed relative to the water of 0.45 m/s, while the speed of the current is 2.0 m/s. If it takes the swimmer 160 s to cross the river, how wide is the river?

    asked by Natalie on September 24, 2014
  98. Physics

    A stone is aimed at a cliff of height h with an initial speed of v = 60.0 m/s directed 25.0° above the horizontal, as shown in the Figure below by the arrow. The stone strikes at A, 4.30 s after launching. What is the height of the cliff?

    asked by jameson on September 16, 2012
  99. algebra

    Area of a painting. A rectangular painting with a width of x centimeters has an area of x2  50x square centimeters. Find a binomial that represents the length. See the accompanying figure.

    asked by kool-v on January 28, 2010
  100. Algebra

    A cone has a radius of 15 cm and a volume of 540 cm3. Find the volume of a similar cone with a radius of 10 cm. A. 54 cm^3 B. 240 cm^3 C. 16 cm^3 D. 360 cm^3 I think its D but by the process of elimination...don't know how to figure it out really...?

    asked by Cassie on February 17, 2013