1. physics

    A graduated cylinder is inverted in a very large bucket of water. The depth of the water in the container is 6 m and the top of the bucket is open to the air in the room. The mouth (bottom) of the graduated cylinder is 4 m above the bottom of the
  2. Math

    Water is leaking out of an inverted conical tank at a rate of 0.0109 {\rm m}^3{\rm /min}. At the same time water is being pumped into the tank at a constant rate. The tank has height 9 meters and the diameter at the top is 4.5 meters. If the water level is
  3. Chemistry

    A vilatile liquid was allowed to evaporate in a 43.298 g flask that has a total volume of 252 ml. The temperature of the water bath was 100 degree Celsius at the atmospheric pressure of 776 torr. The mass of the flask and condensed vapor was 44.173 g.
  4. Discrete Math

    A factory makes automobile parts. Each part has a code consisting of a letter and three digits, such as C117, O076, or Z920. Last week the factory made 60,000 parts. Prove that there are at least three parts that have the same serial number.
  5. Physics

    A power station with an efficiency of 0.4 generates 10(to the power of 8)watts of electric power and dissipates 1.5 x 10(to the power of 8) watts of thermal energy to the cooling water that flows through it. Knowing that the specific heat of water in SI
  6. trig problem

    Hi, A fountain in a shopping centre has a single jet of water. The height of the jet of water varies according to a sinusoidal function. A student notes that, in exactly one minute, the jet goes from a minimum height of 2m to a maximum height of 6m and
  7. chemistry

    So I did a titration lab at school with NaOH and HCl. i have to find: - volume used, NaOH - Moles of NaOH - Moles of HCl -Volume used unknown HCl - Molarity of HCl solution My concentration of NaOH stock solution was 0.100 mol/lL Final buret reading, NaOH:
  8. Trigonometry

    Suppose you were at the beach and notice that at 1:00 pm the tide is in, that is, the depth of water is at its deepest. At that time you find that the depth of the water at the end of the pier is 1.9 meters. At 7:00 that evening when the tide is out, the
  9. Physics

    i)A boy of 45kg is 5m above a swimming pool on a spring board. The boy jumps up into the air which is 2m above the spring board before falling into the water. What is the maximum depth the boy can reach in the water if the average resisting force of water
  10. social studies

    as a automobile assembly worker at a GM plant in Ohio, in t e current economic situation, will new manufacturing methods such as industrial robotics increase or decrease job security? what can GM and the UAW do independent of gov action to enhance job
  11. physics

    A hose ejects water at a speed of 2m/s through a hole of area 0.01m2.if the water strikes a wall normally,calculate the force on the wall in Newtons,assuming the velocity of water nomal to wall is zero after collision.
  12. chem

    A 25.0 g aluminum block is warmed to 65.2 C and plunged into an insulated beaker containing 55.3g of water initially at 22.0C. the aluminum and water are allowed to come to thermal equilibrium. Assuming that no heat is lost, what is the final temperature
  13. precalculus

    how do you solve problems as such: if a person drops a water balloon off the rooftop of a 36 foot building, the height of the water balloon is give by the equation h=-16t^2+36, where t is in seconds. when will the water balloon hit the ground?
  14. physics

    A car is coasting backwards down a hill at -5.0 m/s when the driver gets the engine started. After 4 seconds, the car is moving uphill at a velocity of +3 m/s. What is the car’s average acceleration?
  15. HELPPPP

    A car is driven at a constant speed of 77 km/h down a road. The car's engine delivers 49 kW of power. Calculate the average force that is resisting the motion of the car.
  16. physics

    A car is driven at a constant speed of 79 km/h down a road. The car's engine delivers 47 kW of power. Calculate the average force that is resisting the motion of the car.
  17. Physics

    A car is driven at a constant speed of 85 km/h down a road. The car's engine delivers 49.2 kW of power. Calculate the average force that is resisting the motion of the car.
  18. Chemistry

    In the reaction between H2O2 and I-, 15 mL of 0.30M KI, 65. mL of 0.10M H2O2 and 19 mL of 0.020M Na2S2O3 were mixed in a flask containing starch and buffer and the total volume was made up to 500mL with distilled water. The solution turned blue (indicating
  19. Physics Classical Mechanics

    A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 10.0 cm. The two vertical pipes are open at the top, and the difference in water level between
  20. physics again

    A Chinook salmon has a maximum underwater speed of 3.58 m/s, but it can jump out of water with a speed of 6.26 m/s. To move upstream past a waterfall, the salmon does not need to jump to the top of the fall, but only to a point in the fall where the water
  21. classical mechanics

    A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 20.0 cm. The two vertical pipes are open at the top, and the difference in water level between
  22. physics (Urgent)!!!!!!!!!!!!!!!!!!!!!!

    A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 10.0 cm. The two vertical pipes are open at the top, and the difference in water level between
  23. Chemistry

    LiI(s) → Li+(aq) + I‾ (aq) Solid LiI dissolves as shown in the above equation. A 8.00 g sample of LiI was dissolved in 57.5 g of water. The initial temperature of the water was 21.40°C. After the compound dissolved, the temperature of the
  24. Physics

    A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. The sphere has a volume of 0.600m^3 and the tension in the cord is 840N . What is the mass of the sphere? And Calculate the buoyant force
  25. Chem

    How do I do this problem Assume you dissolve 2.56 g of malic acid, C4H6O5, in half a liter of water (500.0 g). Calculate the molarity, molality, mole fraction, and weight percent of acid in the solution. (Assume the final volume of the solution is 500. mL)
  26. physics

    Engine oil (η = 0.20 Pa⋅s) passes through a fine 2.60-mm-diameter tube that is 8.60 cm long. What pressure difference is needed to maintain a flow rate of 7.8 mL/min ? So what i did was (7.8Ee-3 /60) = π P (1.3e-3) ^4 /(8* 0.086*0.2) I get
  27. Physics

    Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant
  28. physics

    Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant
  29. chemistry

    Would you use a physical model or a conceptual model to describe the following: a gold coin, dollar bill, car engine, air pollution, virus, spread of sexually transmitted disease?
  30. physics

    A 1-kg rocket is fired straight up from level ground. The engine is able to provide a constant 15N of thrust for exactly 5 seconds after which it shuts of completely. Find the maximum height that the rocket achieves.
  31. Physics

    The engine of a motorboat delivers 30.0 kW to the propeller while the boat is moving at 15.0m/s. What would be the tension in the towline if the boat were being towed at the same speed? I know to use P=Fv and solve for F so P = 3000kN right because 1 kW =
  32. Physics

    A constant force of 100N , directed upward, is applied to a 5.0kg toy rocket by the rocket's engine. Find the rockets acceleration? I thought it'd be as simple as F=ma to be 20 m/s2 but I was wrong. What am I overlooking?
  33. Social Studies 1

    Which countries separated the Soviet Union from Western Europe? The so-called Warsaw Pact countries. Use Google or anothe search engine for references that will provide their names.
  34. History

    What is Jean Pierre Blanchard most known for in history? 1) *invented the steam engine 2) *first man to swim the English channel 3) *first successful hot air balloon flight 4) *discovered bacteria
  35. physics

    A truck with a mass of 1.5 x 103 kg accelerates to a speed of 18.0 m/s in 12.0 s from a dead stop. Assume that the force of resistance is a constant 400.0 N during the acceleration. What is the average power developed by the truck’s engine?
  36. chemistry

    suppose a new car travels 70.0 miles on one gallon of gasoline with 40% efficient engine. how much fuel is wasted annually due to energy efficiency if in one yr, 478.26 gallons of fuel is burned?
  37. calculus

    3. The radius r of a sphere is increasing at a constant rate of 0.04 centimeters per second. (Note: The volume of a sphere with radius r is v=4/3pir^3 ). a. At the time when the radius of the sphere is 10 cm, what is the rate of increase of its volume? b.
  38. physics

    A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 10.0 cm. The two vertical pipes are open at the top, and the difference in water level between
  39. physics

    A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the salmon is in a stream
  40. physics

    A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the salmon is in a stream
  41. Science

    I'm having another problem. These multiple choice questions confuse me. Can you please help again. The density of seawater is either greater than freswater, increases with increasing depth in the oceans, changes with changing temperature, increases with
  42. CHEM

    I know I posted this question again but no one is really helping me. Can someone please help me as soon as possible. In a constant-pressure calorimeter, 60.0 mL of 0.340 M Ba(OH)2 was added to 60.0 mL of 0.680 M HCl. The reaction caused the temperature of
  43. AP Physics

    Question Part Points Submissions Used The drawing below shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the
  44. geography

    Can someone explain what this means? The key policy problem regarding water for this purpose is the need to allocate water supplies in a way that properly balances oil sands production needs with ecosystem and human needs in the region. While the amount of
  45. Algebra

    TeaPots n Treasures sells loose Oolong tea for $2.15 per ounce. Donna mixed Oolong tea with shaved almonds that sell for $0.95 per ounce to create the Market Street Oolong blend that sells for $1.85 per ounce. One week, she made 300 oz of Market Street
  46. Application prob. for Trig.

    Hi, A fountain in a shopping centre has a single jet of water. The height of the jet of water varies according to a sinusoidal function. A student notes that, in exactly one minute, the jet goes from a minimum height of 2m to a maximum height of 6m and
  47. Physics

    A brush fire is burning on a rock ledge on one side of a ravine that is 20 m wide. A fire truck sits on the opposite side of the ravine at an elevation 6.5 m above the burning brush. The fire hose nozzle is aimed 35∘ above horizontal, and the
  48. chemistry

    An automobile maker has an order for 7,500 new cars to be delivered in one week. Each car must be fitted with a new hood ornament that requires 1 hour and 15 minutes to install. Assuming the factory operates on a standard workweek shift (8 hours per day
  49. rotations

    If the coefficient of static friction between tires and pavement is 0.7, calculate the minimum torque that must be applied to the 63-cm-diameter tire of a 925-kg automobile in order to "lay rubber" (make the sheels spin, slipping as the car accelerates).
  50. 7th Grade Science

    Write a short essay in which you create an analogy to describe particle motion. Compare the movements and positions of people dancing with the motions of water molecules in liquid water and in water vapor. I am NOT asking anybody to do this for me, all I
  51. Math

    Hayden had 2 1/2 gallons of water in his watering can. The seed packet said to use 1/4 of a gallon for peppers and 5/8 of a gallon for tomatoes. Hayden then used some of the water for lettuce. If Hayden had 3/4 gallons of water left over, about how much
  52. Math

    Water is leaking out of an inverted conical tank at a rate of 0.0109 {\rm m}^3{\rm /min}. At the same time water is being pumped into the tank at a constant rate. The tank has height 9 meters and the diameter at the top is 4.5 meters. If the water level is
  53. Calculus

    Suppose an airline policy states that all the baggage must be boxed shaped with a sum of length, width, and height not exceeding 138 inches. What are the dimensions and volume of a square based box with the greatest volume under these conditions.
  54. math

    A cylindrical glass of radius 7 cm is partially filled with water . 154 metal cubes of edge length 1 cm have been dropped into this glass slowly.after that water rises up to the brim of the glass .the rise in water level will be
  55. calculus2

    A tank is full of water. Find the work required to pump the water out of the spout. (Use 9.8 m/s^2 for g. Use 1000 kg/m^3 as the density of water. Assume r = 9 m and h = 3 m.) The tank is a spherical shape with r as the radius(9m). On top of the tank is a
  56. calculus

    water is pouring into a conical cistern at the rate of 8 m^3/minute. If the height of the inverted cone is 12 meters and the radius of its circular opening is 6 meters, how fast is the water level rising when the water is 4 meters depth?
  57. Physics

    An electric heating coil is immersed in a beaker of water and turned on. A current of 3.50 A floured through the coil. After the water starts to boil, it is found that 60.0 g of water vaporizes in 4.00 minutes. What is the resistance of the coil? (Iv = 540
  58. Physics

    An electric heating coil is immersed in a beaker of water and turned on. A current of 3.50 A floured through the coil. After the water starts to boil, it is found that 60.0 g of water vaporizes in 4.00 minutes. What is the resistance of the coil? (Iv = 540
  59. chem

    how do you solve for the combined gas law?..i ..I am very confused ..someone help by making it easier and clear since i am kinda slow.. ex.a sample of neon gas has a volume of 752ml at 25.0C. what will the volume at 50.0C be if pressure is constant
  60. Chemistry

    If 20dm3 methane was burned in pure oxygen: CH4(g) + 2O2(g) arrow CO2(g) + 2H2O(l) how do I work out the volume of carbon dioxide made? And what volume of oxygen would be required? Thank you.
  61. Orgo

    What volume of 1.20 M nitric acid is needed to convert 5.5g of m-chlorophenol to 3-chloro-2,6-dinitrophenol? I So far I have converted the 5.5g chlorophenol to mols and I got .043 mol. I know Volume * Molarity (1.2M)=moles. At this point I am stuck.
  62. Geometry

    If the edges of a rectangular prism are 8cm, 6cm, and the diagonal is 10radical2, what is volume of the solid? A right circular cylinder with a radius of 4 has a lateral area of 40pi cm squared. What is the volume of the cylinder?
  63. Chemistry

    A weather balloon with a volume of 3.86934 L is released from Earth’s surface at sea level.What volume will the balloon occupy at an altitude of 20.0 km, where the air pressure is 10 kPa? Answer in units of L
  64. Chemistry

    A small crack is present in the rubber stopper. How does this affect the calculated molar volume of the CO2? *experiment deals with carbonate analysis;molar volume of carbon dioxide
  65. Meteorology

    A gas bubble with a volume of 3 milliliters (ml) originates at the bottom of a lake where the pressure is 4.0 atmospheres (atm). What will the bubble's volume be when it reaches the surface, assuming the temperature doesn't change?
  66. phy

    calculate the work done on the system when 1.00mol of gas held behind a piston expands irreversibly from a volume of 1.00dm cube to a volume of 10.0dm cube against an external pressure of 1.00 bar
  67. Chemistry I

    A scuba diver's tank contains 0.23 kg of O2 compressed into a volume of 3.5 L. (a) Calculate the gas pressure inside the tank at 11°C. ________atm (b) What volume would this oxygen occupy at 20°C and 0.92 atm? ________L what are the formulas for this
  68. Math

    The radius of a cylinder is 3.5 ft. The height is 14 ft. Find the surface area and volume of the cylinder to the nearest tenth of a foot. I think the volume is 538.51 in^3. I just don't know the SA. Is it, possibly, 164.85 in^2. Or, no where closer than
  69. chemistry

    calculate the pressure in atm of a balloon filled with 7.5g of helium gas if the baloons volume decreases to 7.5L suppose the balloons pressure and volume are originally 799 mmHg and 15L
  70. Chemistry 12 - Gases

    A gas is initially at 345 K, 821 torr, and occupies a volume of 5.85 L. What volume will the gas occupy if the temperature and pressure decrease, respectively, to 7 degrees celsius and 0.921 atm?
  71. Chemistry

    A quantity of N2 occupies a volume of 1 L at 290 K and 1.5 atm. The gas expands to a volume of 2.7 L as the result of a change in both temperature and pressure. Find the density of the gas at these new conditions (in grams per liter).
  72. Calculus(answer needed immediatly,thanks)

    A paper cup has the shape of a cone with height 8cm and radius 3cm at the top. Water is being poured into the cup at the rate of 2cm3/s. How fast is the water level rising when the water is 6cm deep?
  73. math

    1) A tank holds water with a base 2 ft by 6 ft. If a rectangular solid whose dimensions are 1 foot by 1 foot by 2 feet is totally immersed in water, how many inches with the water rise? A)1/6 B)1 C)2 D)3 E)12 ^I got B 2) AB+BA= CDC IF each of the four
  74. calculus

    Calculate the work (in joules) required to pump all of the water out of the tank. Assume that the tank is full, distances are measured in meters, and the density of water is 1,000 kg/m^3. Water exits from a small hole at the top of the rectangular box. The
  75. calculus

    please help i am lost at what is dy/dx and what is dy/dt. A trough is 10ft long and its ends have the shape of isosceles triangles that are 3 ft across at the top and have a height of 1ft. If the trough is being filled with water at a rate of 12ft^3/min,
  76. Chemistry

    The cooling system in an automobile holds 10.0 L of ethylene glycol antifreeze. How much energy is absorbed when the temperature of the ethylene glycol goes from 20°C to 100°C? The density and specific heat capacity of ethylene glycol are 1.11 g/mL and
  77. P. Chemistry

    Can anyone direct me on how to solve this problem? All of the variables are makin my head spin--not sure how to organize them. If you can give equations to use that would help.Thnx! 1 L of an impure water solution has a freezing point of -11 °C. Which of
  78. chemistry

    I am confused on how to do the last question. Calculate molarity of HCl from the volumes of acid and base at the equivalence point and the molarity of NaOH from the titration curve. (M of Acid)x(v of acid)= (m of base)x(v of added base) M1= 0.50M of NaOH x
  79. Chem 100

    If the initial volume is 150mL and the final volume is 1L, what is the final pressure?
  80. Math

    The volume of a cone is 316in^3. What is the volume of a similar cone that is larger by a scale of 3?
  81. chemistry

    What is the new volume if the volume of a gas is 3.2 L when the temperature is 7 C if the temperature is increased to 15 C without changing the pressure
  82. science

    will the mass of an object ever equal its volume. Give an example of two things that may have the same volume but a different mass?
  83. math- surface and volume

    If volume increases by 60%, how much does the surface increase by? Please show work.
  84. Math

    All right Cone has the volume of 333 yd.³ if a right cylinder had the same height and base what would be the volume off the cylinder?
  85. Algebra/Geometry

    Why are we able to develop the volume formula for cones from the volume formula for pyramids?
  86. math

    A cone just fits inside a cylinder with volume 300cm^3. What is the volume of the cone?
  87. Math

    The formula for the volume of a sphere is V=4 out of 3 pi r^3. How is this formula written if the radius,r,is a function of the volume,V?
  88. geometry

    a cylinder has a volume of 19cm cubed, if the radius is doubled what is the volume of the new cylinder
  89. Algebra

    The formula for the volume of a cube is V=s³. What is the volume of a cube with a side length,s,of 3 feet?
  90. math

    A cone just fits inside a cylinder with volume 300cm^3. What is the volume of the cone?
  91. Chemistry

    The hydrogen in an eudiometer has a volume of 80 ml when the pressure is 740 mm. what's its volume at standard pressure?
  92. chemistry

    A sample of gas has a volume of 5.3 L at 7.00 ºC. What volume will the gas have if the temperature is increased to 14.00 ºC? (6 pts) .
  93. chemistry

    Object A is less dense than object B. If objects are the same mass, what can be said about the volume of A as compared to a volume B?
  94. Chemistry

    if a sample of gas has a volume of 8.88 ml at -12.0 C and .975 atm. what volume would this sample have at STP?
  95. math

    If your neighbor’s house was 2/8 smaller than your house, what would the volume be if your volume had dimensions of 13x26x130 sq ft
  96. Math

    A high school senior vacationing in Jamaica for her senior class trip jumped off a 20 foot cliff into a pool of water. The height of the senior above the water is modeled by the function h(t)=-t^2+t/4+5/4 where h(t) is the height of the senior above the
  97. chemistry

    How would one calculate the equilibrium pressure of Sodium bicarbonate and citric acid in water (think Alka Seltzer), reacting in a closed volume. The pressure builds up to a point, where the reaction slows due to pressure build up. How do I calculate the
  98. Technology

    Please check this for me: 5. The freezing point of water on the Celsius temperature scale is a. 0 degrees b. 32 degrees c. 100 degrees d. 212 degrees A 8. A measurement for a rectangular box is given as 150 cubic inches. This measurement indicates the
  99. Chemistry

    Oxy acetylene welding uses acetylene gas which is produced by the reaction of CaC2 with water. It also produces calcium hydroxide as a by product.Calculate the volume in liters measured at 27°C and 965 torr that would be produced from the complete
  100. Chemistry

    1 N204(l) + 2 N2H4(l) --> 3 N2(g) + 4 H2O(g) If you start with: 5.0 x 10^4 g hydrazine (N2H4) "in the tank": 1) How many moles of nitrogen can be created (assuming 100% yield)? 2) How many moles of water can be produced? 2) What mass of dinitrogen