1. physics

    A fight aircraft needs to emergency land due to engine breakdown. The pilot can control the approach velocity to 250 km/hr when the aircraft tires touch the ground. The best deceleration of its braking system is 10 m/s2 . How long will the runway is

    asked by talal on August 11, 2014
  2. science

    3. Would you use a physical model or a conceptual model to describe the following: brain, mind, solar system, birth of universe, stranger, best friend, gold coin, dollar bill, car engine, virus, spread of sexually transmitted disease?

    asked by Anonymous on August 12, 2008
  3. Physics

    A car (m = 670.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 35.0 m. Find the average power the engine must deliver to reach a speed of 23.9 m/s at the top of the hill in 22.7 s(NEGLECT frictional losses:

    asked by Jim on January 6, 2014
  4. physics

    A car (m = 640.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 43.0 m. Find the average power the engine must deliver to reach a speed of 19.9 m/s at the top of the hill in 23.9 s(NEGLECT frictional losses:

    asked by beth on March 2, 2008
  5. Physics

    A car (m = 610.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 49.0 m. Find the average power the engine must deliver to reach a speed of 24.7 m/s at the top of the hill in 20.5 s(NEGLECT frictional losses:

    asked by Kevin on April 14, 2016
  6. English

    If there is much running water from the faucet, the water becomes lukewarm. So you should turn down the faucet a little so that it has little running water, and then the water will become more warm or hot. Then the baby in the bath tub will not feel cold.

    asked by rfvv on November 21, 2012
  7. Physics

    A sound wave travels in air toward the surface of a freshwater lake and enters into the water. The frequency of the sound does not change when the sound enters the water. The wavelength of the sound is 3.52 m in the air, and the temperature of both the air

    asked by Abdul on April 9, 2018
  8. Chemistry

    Sea water conducts electricity. Which statements give the best explanation for this a) Ions are able to move around in sea water b) Electrons can pass from ion to ion in the sea water c) The sea water contains more ions with positve charges than ions with

    asked by peter on November 6, 2010
  9. Chemistry

    74. Sodium hydrogen carbonate is also known as baking soda. When this compound is heated, it decomposes to sodium carbonate, carbon dioxide, and water vapor. Write the balanced equation for this reaction. What volume of carbon dioxide gas at 77 degrees C

    asked by Martha on September 30, 2016
  10. Physics

    the pressure is one atmosphere and determine the heat in joules required to produce 5.03 kg of water vapor at 100.0 °C, starting with (a) 5.03 kg of water at 100.0 °C and (b) 5.03 kg of liquid water at 0.0 °C. for part (a) I used the equation Q=mL and L

    asked by Jena on November 18, 2006
  11. Definition

    In which sentence is the word SPUTTERS used correctly? a.The engine SPUTTERS when it is started in the cold. b.The ball SPUTTERS as it bounces across the court. c.That tree SPUTTERS when it drops its leaves. d.The wave SPUTTERS as it breaks over the beach

    asked by Ed on February 3, 2016
  12. calculus

    Water is being filled into a water tank at 22 liters/second. The base of the tank has dimensions w = 1 meter and L = 2 meter . What is the rate of change of the height of water in the tank? (express your answer in cm/sec).

    asked by kchik on November 9, 2012
  13. Math

    The depth d in feet of the water in a bay at is given by d(t) = 3/2 sin (5πt/31) + 23 where t is time. Graph the depth of the water as a function of time. What is the maximum depth of the water to the nearest tenth of a foot?

    asked by Anonymous on October 2, 2014
  14. calculus

    Water is being filled into a water tank at 22 liters/second. The base of the tank has dimensions w = 1 meter and L = 2 meter . What is the rate of change of the height of water in the tank? (express your answer in cm/sec).

    asked by kchik on November 9, 2012
  15. maths help!!!!!!!!

    An empty 5-gal water jug weights 0.75lb. with 3 c of water inside, the jug weighs 2.25 lbs. Predict the weight of the jug with 5 c of water inside. Plz explain how to do this.....

    asked by anjali on October 7, 2008
  16. math

    Water is poured into a right circular cone with a height of 10 cm and diameter of 8 cm until it is three-fourths full. All this water is then poured into an empty cylindrical container with a radius of 5 cm and height of 9 cm. What is the height of the

    asked by Anonymous on August 20, 2015
  17. school

    6) Classification relies on the ability to recognize likenesses and differences. False 7) Conservation means A) that if two sets are compared and found to be equal, when they are rearranged so they do not look the same, the child determines that the two

    asked by Anonymous on August 14, 2017
  18. physics

    How do i put them all in sig fig form??? What is the volume in cubic cm of a sphere with radius 2 cm? is it = 33.51032163829112 What is the area in m2 of a triangle with base 2.8 m and height of 10.4 m? is it = 14.56 A sphere has a volume of 106 cm3. What

    asked by Yulia on August 25, 2009
  19. Chem.

    A balloon has a volume of 240 mL at room temperature (25°C or 298 K). What temperature would you have to heat or cool the balloon to in order to change its volume to 360 mL (Answer in Kelvin)? please write out the formula and how you solved this so I can

    asked by Sandee on September 12, 2017
  20. physical science(chemistry change)

    Experiment of tiratic oxilic acid wih mass 4,5g and volume of 25ml,nd concentration of 0,05mol.dm.3 against volume of 14ml and 1,79mol.dm3 sodium hydoxide to determine the concentration of sodium hydroxide,,

    asked by dineo on June 12, 2014
  21. area/length/volume

    How are length, area, and volume related in terms of the three dimensions of space? and How is it possible for objects of the same volume to have different masses? #2 Gads! Think of a cup full of steel marbles and a cup full of cotton balls. ummm, ?

    asked by Leiann on February 5, 2007
  22. 6th grade science

    we had this question on a test the measure of the amount of SPACE occupied by an object is its: weight mass area volume I put volume and it was marked wrong. The teacher said it was mass. I looked it up and still think I am correct, can you tell me which

    asked by E6 on October 31, 2014
  23. Math

    The edge of a cube was found to have a length of 50 cm with a possible error in measurement of 0.1 cm. Based on the measurement, you determine that the volume is 125,000 cm3. Use tangent line approximation to estimate the percentage error in volume.

    asked by Mimi on December 29, 2014
  24. Calculus-Optimal Form: need help... please

    Suppose you are designing a coffee creamer container that has a volume of 48.42 cubic inches. Use the surface area and volume of a cylinder to develope an eqn. relating radius r and surface area S. ¡Ç=pi=3.14 S=2¡Çr^2+2¡Çrh V=¡Çhr^2

    asked by Stephanie on November 5, 2008
  25. physics

    10 moles of a gas initially at temperature 300 K is compressed adiabatically from a volume of 2 cm3 to a volume of 325 cm3. To the nearest tenth of a joule what is the work done by the piston? (It is a monatomic ideal gas.)

    asked by sandhu on October 26, 2010
  26. science

    " Use the words mass, volume, and density to distinguish between gases, liquids, and solids in terms of the particle theory of matter." I don't understand what to do. Am I supposed to describe the mass, volume, and density of each fluid?

    asked by Raluca on April 29, 2011
  27. Chemistry

    A meteorological balloon contains 237. L of helium at 33. °C and 0.832 atm. If the volume of the balloon can vary according to external conditions, what volume would it occupy at an altitude at which the temperature is -57. °C and the pressure is 0.094

    asked by Anna on November 1, 2014
  28. GEneral Chemistry

    the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density When I look at this i know that 99pm= 9.9e-7 and to get volume v=(3/4) or 1.33 (3/4)*3.14- pi *r^3 When I get to this point I do: 1.33*3.14= 4.1762*9.9e-7=

    asked by melissa- HELP!!! on February 6, 2013
  29. Chemistry

    Fill a balloon with helium gas to a volume of 2.68 L at 23 celsius and 789mmHg. What would the volume of helium if the pressure changes to 632 mmHg but the temperature is unchanged. This is how I solved it V2 = V1 X P1/P2 2.68L X 789/632 = ANSWER V2 =.3.35

    asked by LT on October 23, 2007
  30. Econ VERY URGENT, HELP!

    Consider a simple economy consisting of only four firms. Firm A, a mining enterprise, extracts iron ore. Firm B, a Steelmaker, produces steel sheets. Firm C, a carmaker, makes automobile while Firm D produces automobile tires. In 2016, firm A extracts

    asked by Linda on October 7, 2016
  31. VERY URGENT, HELP!

    Consider a simple economy consisting of only four firms. Firm A, a mining enterprise, extracts iron ore. Firm B, a Steelmaker, produces steel sheets. Firm C, a carmaker, makes automobile while Firm D produces automobile tires. In 2016, firm A extracts

    asked by Linda on October 7, 2016
  32. Econ URGENT HELP!

    Consider a simple economy consisting of only four firms. Firm A, a mining enterprise, extracts iron ore. Firm B, a Steelmaker, produces steel sheets. Firm C, a carmaker, makes automobile while Firm D produces automobile tires. In 2016, firm A extracts

    asked by Linda on October 7, 2016
  33. Environmental Science

    Can someone please help me match up my vocad since I've gotten them all wrong in class the other day? 1.__Mississippi River 2.__Area above an aquifer 3.__Bottled water 4.__Bacteria 5.__multiple sources 6.__fertilizer runoff 7.__law designed to improve

    asked by Mack on April 21, 2007
  34. Mathematics

    15 liters of water is poured from container A to Container B and 10 liters of water is poured from container A to container C. If C had 20 liters of water less than A, how many more liters of water does C have than A? A. 10L C. 20L B. 15L D. 25L What

    asked by Mary Rose on January 27, 2017
  35. chemistry

    This problem is from my chemistry book and I am having a little trouble with the intermediary steps: Barium metal crystallizes in a body- centered cubic lattice (atoms at lattice points only) The unit cell edge length is 502 pm, and the density of the

    asked by Tokey on May 18, 2010
  36. Chemistry;HELP

    Volume Problems Answer the following questions. Scan and upload your questions and answers to your student section labeled Volume Volume Problems. Identify the following chemical equations by type. 1. If an electric discharge produces 500 cm3 of ozone

    asked by Unknown on August 21, 2013
  37. Energy

    174520 = (massboiled) (2260) .1716 = massboiled so .1716? Suppose a burner transfers 325 kJ of energy to 450 kg of liquid water at 20 C degrees. What mass of the water would be boiled away? The first energy going in heats the water: energy=mass*c*(100-20)

    asked by Min on December 17, 2006
  38. Equations and Graphing

    Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 700 liters in the pond to start. Let W represent the amount of water in the pond (in liters), and let T represent the number

    asked by CW on March 11, 2018
  39. Chemistry

    Hello, I just finished an experiment in class dealing with the separation of a sand and salt mixture through the means of filtration (with filter paper and water) and evaporation (using a hotplate). As I was calculating the percent recovery, I yielded

    asked by Anna on September 12, 2018
  40. Physics

    River Dam generates electricity with water taken from a depth of 110 m and with an average flow rate of 740 m3/s. a) Calculate the power in this flow. Note that the velocity and height of the water are not changed appreciably by the generators, and the

    asked by Slice on November 6, 2010
  41. algebra

    The volume of a gas varies directly with its temperature and inversely with the pressure. If the volume of a certain gas is 20 cubic feet at a temperature of 350K and a pressure of 35 pounds per square inch, what is the volume of the same gas at 330 K when

    asked by Anthony on November 5, 2016
  42. Physics

    At a nuclear power plant, water at 6degress Celius from a nearby lake is used in a heat exchange to condense spent steam at a temperature of 115 degees C to water at 80 degrees C. If the cooling water returns to the lake at a temperature of 18 degrees C,

    asked by alex on April 20, 2017
  43. periodic functions(math)

    A vessel is crossing a channel. The depth of the water(measured in metres) varies with time and is represented by the following equation: d(t)=2.5sin(0.523t)+2.9 a. create a graph showing the depth of the water over 24 hours. b. what is the period of this

    asked by Kelly on March 12, 2015
  44. Ap Biology

    We performed a lab that studied osmosis in potato cells. We put cylinders of potato into varying molar Sucrose solutions and after recording different types of data were able to find the osmotic and water potential of the sucrose solution and potato cells.

    asked by Jessie on November 25, 2007
  45. chemistry 2

    The volume of blood in the body of a certain deep-sea diver is 6.00L. Blood cells make up 55% of the blood volume, and the remaining 45% is the aqueous solution called plasma. What is the maximum volume of nitrogen measured at 1.00 atm and 37 degree

    asked by vel on October 19, 2011
  46. science

    1. The surface tension in a cup of water is caused by _____. (1 point)attractive forces between the water and its container attractive forces between water molecules adhesive forces between water molecules adhesive forces between the water and its

    asked by NIKE on April 10, 2012
  47. Gen chem II

    Calculate the work done when 50.0g of tin dissolves in excess acid at 1.00atm and 25 (degree in celsius) Sn(s)+2H(aq)----- Sn(aq) +H2(g) Assume ideal gas behavior The work done = (pressure)*(increase in volume) The increase in volume is due to the H2 gas

    asked by Farzan on March 6, 2007
  48. Chemistry Lab

    Which of the following would NOT be a factor for a solute to dissolve in water? A. A solute separates into ions which are supported by hydration. B. Electrostatic attraction between the partially charged atoms in water molecules and the solute. C. A solute

    asked by Natasha on January 12, 2011
  49. Chemistry Lab

    Which of the following would NOT be a factor for a solute to dissolve in water? A. A solute separates into ions which are supported by hydration. B. Electrostatic attraction between the partially charged atoms in water molecules and the solute. C. A solute

    asked by Natasha on January 12, 2011
  50. physics

    A fire hose ejects a stream of water at an angle of 37.9 ° above the horizontal. The water leaves the nozzle with a speed of 25.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

    asked by frost on February 10, 2011
  51. physics

    compute the kinetic energy of an 1800 lb automobile traveling at 30 mi/hr. how many times as great is the kinetic energy if the velocity is doubled? compute the kinetic energy, in erg and in joules, of a 2 gram bullet travelling at 500 m/sec.

    asked by Anonymous on April 17, 2014
  52. AP Chemistry

    A typical bathtub can hold 93 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 60◦F to 99◦F. Assume that the natural gas is pure methane(CH4) and that the products of

    asked by Gabriella on October 11, 2013
  53. physics- energy and work

    A 47.6-kg diver steps off a 10.82 m high diving board and drops straight down into the water. If the diver comes to rest 5.3 m below the surface of the water, determine the average resistance force exerted on the diver by the water. What is the total

    asked by Hi on November 12, 2014
  54. chemistry

    a 42 piece of ice at 0.0 C is added to a sample of water at 8.0 C. all of the ice melts and the temperature of the water decreases to 0.0 C. how many grams of water were in the sample.

    asked by Linda on January 30, 2014
  55. Algebra 1

    Thank you in advance for your kind help! How much fresh water should be mixed to a 30% salt water solution, to obtain 90 gallons of a 23% salt water solution?

    asked by Matt on May 4, 2016
  56. Algebra 1

    Thank you in advance for your kind help! How much fresh water should be mixed to a 30% salt water solution, to obtain 90 gallons of a 23% salt water solution?

    asked by Matt on May 4, 2016
  57. physics

    A sonar signal of frequency 1.00 106 Hz has a wavelength of 1.40 mm in water. (a) What is the speed of the signal in water? (b) What is its period in water? (c) What is its period in air?

    asked by noah on February 1, 2013
  58. college chemistry

    a 42 piece of ice at 0.0 C is added to a sample of water at 8.0 C. all of the ice melts and the temperature of the water decreases to 0.0 C. how many grams of water were in the sample.

    asked by Linda on January 30, 2014
  59. English

    1. I will drink enough water. 2. I will dring water enough. 3. I will eat enough water. ---------------------------------- Are #1 and #2 correct grammatically? What about #3? Can we use 'eat' instead of 'drink'? In a basic grammar test, can we use both #2

    asked by rfvv on July 5, 2017
  60. Marine Science

    What happens to the majority of water at the poles and at the equator? My answer was that at the poles the water gets cold and at the equator the water gets hot but my teacher said this was wrong. Please help!

    asked by Kim on March 18, 2009
  61. math!!!!!!! help 3

    a water cooler contains 5 gallons of water.if drink 3/5 gallon for each of the next 6 days how many gallons will be left in water cooler at the end of the sixth?

    asked by niki on October 28, 2010
  62. Chemistry

    A 50.0- piece of ice at 0.0 is added to a sample of water at 8.0. All of the ice melts and the temperature of the water decreases to 0.0. How many kilograms of water were in the sample?

    asked by Cassie on May 25, 2011
  63. desity

    A fish tank holds 35 {\rm gal} of water. Using the density of 1.0 {\rm g/mL} for water, determine the number of pounds of water in the fish tank

    asked by Anonymous on January 28, 2011
  64. physics

    A sonar signal of frequency 1.00 106 Hz has a wavelength of 1.40 mm in water. (a) What is the speed of the signal in water? (b) What is its period in water? (c) What is its period in air?

    asked by Anonymous, on February 4, 2013
  65. College Algebra 2

    The number of kilograms of water in the human body varies dirctly as the mass of the body. An 84-kg person contains 64-kg of water. How many kg of water is in a 63-kg person?

    asked by Francine on September 26, 2011
  66. Chemistry

    A 70 piece of ice at 0 is added to a sample of water at 6. All of the ice melts and the temperature of the water decreases to 0. How many grams of water were in the sample?

    asked by Sherice on September 9, 2012
  67. Chemistry

    If the solubility of arsenic trioxide in water at 25 C is 20g/1L water, would 250mL of water at 25 C containing 3.5g of arsenic trioxide be saturated, unsaturated, or supersaturated?

    asked by Sarab on April 27, 2011
  68. 6th grade math

    the water level of a river is 50 feet. After one day,the water level has decreased to 38,5 feet. After two days, the water level is 37 feet,and after three days,the water level is 35.5 feet. write an equation to represent the water level,L after d days.

    asked by dashana on September 30, 2010
  69. 6th grade math

    the water level of a river is 50 feet. After one day,the water level has decreased to 38,5 feet. After two days, the water level is 37 feet,and after three days,the water level is 35.5 feet. write an equation to represent the water level,L after d days.

    asked by dashana on September 29, 2010
  70. physics

    A solid right circular cone of uniform mass density is initially at rest above a body of water so that its vertex is just touching the waters surface with its axis of symmetry along the vertical. Now, the cone falls into the water, and has zero speed at

    asked by unowen on June 15, 2017
  71. science

    When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these

    asked by kayci on May 13, 2010
  72. chemistr

    10g of nacl were added to 10ml of water. he resulting solution was diluted to be a final volume of 250ml. Calculate the molarity of the solution. My calculation 10g/58g/mol = 0.173M 0.173M/025L =0.689M Given the density of the solution is 0.9864g/ml.

    asked by Fai on December 25, 2012
  73. Biology

    a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. I know that the water in the cell is the high concentration and will go to the sugar water which is the low concentration. b.

    asked by Judy on October 5, 2015
  74. Chemistry

    A 36.0mL sample of 1.20 M KBr and a 56.0mL sample of 0.700 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 60.0mL. What is the molarity of the KBr in the final solution?

    asked by Cecelia on October 4, 2011
  75. Chemistry

    A 36.0mL sample of 1.20 M KBr and a 56.0mL sample of 0.700 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 60.0mL. What is the molarity of the KBr in the final solution?

    asked by Cecelia on October 4, 2011
  76. Chem

    As a part of a study to see whther just the chloride ion on NaCl accelerates the rusting of iron, a student decided to see whtjer iron rusted in a solution on Na2SO4. The solution was made by dissolving 4.550 g of Na2SO4 in water using 125.0 mL volumetric

    asked by Lena on July 6, 2009
  77. Chemistry

    We are given that the solubility product of platinum (II) sulfide is 9.9x10^-74 We are told to write a balanced equation for dissolving platinum (II) sulfide. I put : PtS(S) Pt^2+(aq) + S^2-(aq) and then we had to write the Ksp expression: Ksp=[Pt^2+][S2-]

    asked by Kellie on May 3, 2017
  78. Chemistry

    hen excess Ag metal is added to 0.246 L of 1.290 M Fe3+(aq) at 298K, the following equilibrium is established: Ag+(aq) + Fe2+(aq) Ag(s) + Fe3+(aq) (1) If the equilibrium concentration of Ag+ is 0.504 M, what is the value of K? K = (2) Using the value of K

    asked by Shipaz on November 27, 2016
  79. Resources and references

    When conducting research on the Internet. What is starting point for determining how to start the research? A: How many times I will need to revise a report? B: Do you want to use a search engine or search directory? C: Do I want an opinion about this

    asked by Sofiya on June 27, 2013
  80. English

    Question 11 He brought home a new car - large, fire-engine red, fast, and which he could not afford. unclear pronoun reference lack of parallelism mixed metaphor simile my answer c. mixed metaphor

    asked by christopher on April 21, 2010
  81. Physics

    A rocket car had a mass of 1650kg. The engine expels 140kg of combustion products in 7s. The expelled material has a velocity of 850m/s to the south. Calculate the velocity of the car at the end of 7s. ANSWER: 72m/s to the north

    asked by Sarah on May 10, 2012
  82. Math

    Engine failure forced Robbin to pilot her Cessna150 to an emergency landing. TO land, Robbin's plane glided 17,000 ft over a 15,000-fot stretch of deserted highway. From what altitude did the descent begin?

    asked by Wanda on July 22, 2012
  83. Chemistry

    1. A piece of rectangular wood that measures 3.0 cm by 6.0 cm by 4.0 cm has a mass of 80.0 grams. What is the density of the wood? Would the piece of wood float in water? 2. I threw a plastic ball in the pool for my dog to fetch. The mass of the ball was

    asked by Perrie on July 8, 2013
  84. physics

    A 1.1 pebble is stuck in a tread of a 0.85 diameter automobile tire, held in place by static friction that can be at most 3.9 . The car starts from rest and gradually accelerates on a straight road.How fast is the car moving when the pebble flies out of

    asked by Anonymous on March 12, 2012
  85. AP Chemistry

    2 Questions (Multi-choice and T/F, though not sure if they're right, and these 2 questions have no correspondence to each other) 1.) a.) Consider the following system at equilibrium where Kc = 1.20E-2 and H° = 87.9 kJ/mol at 500 K. PCl5 (g) PCl3 (g) + Cl2

    asked by Ian on February 13, 2015
  86. calculus

    an open box is to be made from a piece of metal 16 by 30 inches by cutting out squares of equal size from the corners and bending up the sides. what size should be cut out to create a box with the greatest volume? what is the maximum volume?

    asked by lulu on November 18, 2011
  87. Chemistry

    A person accidentally swallows a drop of liquid oxygen, O2 (l), which has a density of 1.149 g/mL. Assuming the drop has a volume of 0.050 mL, what volume (mL) of gas will be produced in the person’s stomach at body temperature (37 °C) and a pressure of

    asked by Anonymous on November 20, 2017
  88. math (explanation and answer)

    A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way

    asked by Linda on April 9, 2015
  89. calc (with through steps)

    A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way

    asked by Linda on April 9, 2015
  90. Geometry

    I would greatly appreciate any help I can get with this problem. I need to find the volume of a right triangular prism. The sides of the triangles measure 2cm and the length of the prism is 10cm. I found the surface area to be 64sq cm...is this correct?

    asked by Nicole on February 24, 2010
  91. calculus

    A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way

    asked by Linda on April 9, 2015
  92. how many particles...?(Physics

    A person takes a breath as deep as possible by exhaling as far as possible (leaving a volume of 1.170 L in their lungs), and then slowly inhaling to increase their lung volume by 4.580 L. His body temperature is also 37.64 ¡ãC. (i)How many particles of

    asked by tommy on April 9, 2013
  93. chemistry

    When a reaction mixture with a total volume of 1750 mL that is 0.0263 M aqueous K+ was stoichiometrically produced as per the balanced equation, what volume (mL) of 0.0326 M aqueous K3PO4 was required? 3 BaBr2(aq) + 2 K3PO4(aq) → Ba3(PO4)2(s) + 6 KBr(aq)

    asked by eng on April 3, 2010
  94. Pre Cal

    An open box is formed from an 80cm by 80cm peice of metal by cutting four identical squares from the corners and folding up the sides. Express the volume of the box in terms of x. Then describe how you could find the maximum possible volume.

    asked by Jen on January 9, 2010
  95. Chemistry

    What volume of oxygen gas is needed to react completely with 0.677 L of carbon monoxide gas (CO) to form gaseous carbon dioxide? Assume all volume measurements are made at the same temperature and pressure. Thanks in advance for all help!!

    asked by Ally on March 9, 2015
  96. Gen Chem 2

    The air within a piston equipped with a cylinder absorbs 555 J of heat and expands from an initial volume of 0.12 L to a final volume of 0.87 L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston in

    asked by Jessica on March 6, 2008
  97. Chemistry

    The air was in a cylinder equipped with the piston absorbs 565 duels of heat and expands from an initial volume of .10 l to a final volume of .85 L against an external pressure of 1.0 ATM what is the change an internal energy of the air within the cylinder

    asked by Daisy on November 4, 2015
  98. calc (plz, with steps and explanations)

    A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way

    asked by Linda on April 9, 2015
  99. calculus

    A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way.

    asked by Linda on April 9, 2015
  100. Physics (check)

    A merchant in Katmandu sells you a solid gold 1-kg statue for a very reasonable price. When you get home, you wonder whether or not you got a bargain, so you lower the statue into a measuring cup and measure its volume. What volume will verify that it's

    asked by Emily on May 19, 2008