1. Physics

    If you have steel and wood at 0 Celsius, which is colder Both are the same temperature.

    asked by Diana on March 11, 2007
  2. math

    A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4

    asked by anonymous on July 18, 2011
  3. math

    A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4

    asked by ANONIMOUS on July 18, 2011
  4. linear programming

    A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4

    asked by nmh on July 8, 2011
  5. Portions and integers

    I need help please. Mercury is a metal that is liquid at room temperature. Its melting point of -39 degrees Celsius. The melting point of isopropyl alcohol is -89 Celsius. (Part A) In the context of this problem, what does zero mean ? (I think it just

    asked by Jessica on November 30, 2016
  6. engineering science n3...please help and explain

    Heat A.5kg of steel is cooled down in oil and the temperature drops from 900 degrees celsius to 27degrees celsius. The specific heat capacity of steel is 460J/kg degrees Celsius and that of oil 1.5kJ/kg degrees Celsius Calculate the following: 1.quantity

    asked by cathy on February 24, 2015
  7. physics

    A 70g steel bullet moves at 200m/s just before imbedding itself into a thick anchored wood post. If 70% of the initial kinetic energy goes into heating the bullet (steel c = 460 J/kg-C)...how hot does the bullet become if it initially is at 26 degrees

    asked by Kirk on April 19, 2012
  8. statistics

    A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4

    asked by mary on August 8, 2016
  9. Physics

    Hammering a nail into wood makes it get hotter. Consider a 5-g long, 5-gauge steel nail and a hammer that exerts an average force of 500 N on the nail when it is introduced to a piece of wood. The nail gets warmer each time. Demonstrate that the increase

    asked by Sonder on February 7, 2018
  10. Physics

    Hammering a nail into wood makes it get hotter. Consider a 5-g long, 5-gauge steel nail and a hammer that exerts an average force of 500 N on the nail when it is introduced to a piece of wood. The nail gets warmer each time. Demonstrate that the increase

    asked by I REALLY NEED HELP! on February 8, 2018
  11. Physics

    A steel measuring tape is calibrated at 20 degrees Celsius. A reading of 32.10m is measured when it is used to find the length of a building. If the temperature is 5degrees Celsius, what is the actual length of the building at that temperature? The

    asked by Hannah on October 6, 2008
  12. Physics/Science

    A steel bar reaches a temperature of 420 degrees celsius after it has been welded. Over the next 50 minutes the steel bar cools to 30 degrees celsius. What is the rate of temperature change of the iron?

    asked by John Doswell on December 5, 2015
  13. Physics warming a nail

    2.) Pounding a nail into wood makes the nail warmer. Consider a 5-g steel nail 6 cm long and a hammer that exerts an average force of 500 N on the nail when it is being driven into a piece of wood. The nail becomes hotter. Show that the increase in the

    asked by Mary on September 20, 2009
  14. Physics 20

    1. How much heat energy is required to change 500 grams of water at 100 degrees Celsius to steam at 100 degrees Celsius? 2. How much energy is lost if 7kg of water is cooled from 46 degrees Celsius to 2 degrees Celsius? 3. How much energy is gained when a

    asked by Tamai on June 8, 2014
  15. Physics

    Please Help! I am having difficulties grasping these concepts. Explain please! 1. How much heat energy is required to change 500 grams of water at 100 degrees Celsius to steam at 100 degrees Celsius? 2. How much energy is lost if 7kg of water is cooled

    asked by Tamai on June 8, 2014
  16. physics

    a steel rod when measured with a zinc scale both being at 25 degree Celsius appear to be one meter long.if the zinc scale is correct at 0 degree Celsius, what is the actual length of the rod at 0 degree Celsius? [linear expansivity of steel=12*10^-6

    asked by sanjeet on November 21, 2010
  17. Chemistry

    What volume of 15 degree celsius water must be added to a 1.2KG piece of stainless steel at 85 degree celsius so that the final temperature is 35 degree celsius. assume the container in which the mixing takes place is perfectly insulated.

    asked by john on June 10, 2012
  18. Physics

    I know that sound has a lower pitch in colder air because the air is more dense the colder it is, causing the sound to pass more rapidly through the colder air. But why does the wavelength increase when it passes more quickly through the denser air?

    asked by Mary on October 18, 2009
  19. floral desgin

    A pick machine affixes a A. wood pick or a steel pick to a flower. B. stemmed flower to a foam base. C. wood pick to a flower stem. D. steel pick to a flower stem. i said it was b im not sure thoe

    asked by Tink on March 31, 2015
  20. need some help

    what would the nouns be in this sentence?Undoubtedly it was colder than fifty below--how much colder he did not know?

    asked by mickey on September 10, 2007
  21. Chemistry

    This is a back titration question and I'm struggling with it :/ So if you can help me, that would be very appreciated :) Q. A sample of steel wool was dissolved in excess sulfuric acid. The resulting solution (FeSO4 aq) was then titrated with potassium

    asked by Rapunzel on February 27, 2013
  22. Physics

    I'm also stumped by this one: 3. A bimetallic strip (117 cm by 1 cm by 0.01cm) has aluminum (a = 23x10^-6 1/Celsius) on one side and has steel (a= 12x10^-6 1/Celsius) on the other. It is perfectly straight at room temperature (20 celsius). What change in

    asked by Darlynn on December 11, 2012
  23. physics

    A truck moving at 100 km /h carries a steel girder that rest on its wooden floor. what is the minimum time in which the truck can come to a stop without the girder moving forward ? The coefficient of static friction between steel and wood is 0.5.

    asked by caphas on May 9, 2018
  24. physics

    A truck moving at 100 km /h carries a steel girder that rest on its wooden floor. what is the minimum time in which the truck can come to a stop without the girder moving forward ? The coefficient of static friction between steel and wood is 0.5.

    asked by caphas on May 8, 2018
  25. Physical Science

    Ninety kilojoules of heat were added to a 2.0-kg piece of wood whose temperture then rose from 20 degrees Celsius to 48 degrees Celcius. What was the specific heat of the wood?

    asked by Jaskson on September 18, 2011
  26. physics

    The coefficient of kinetic friction for wood on wood is o.55. The coefficient of kinetic friction for wood on wood is 0.68. For a 3.5kg wood block being pulled horizontally: a. what is the pull force needed to start the wood block moving on a wood floor?

    asked by maddie on December 10, 2016
  27. Physics -- check answers please

    1. what is 67 K equivalent to in Celsius? answer: -206.15 C 2. what is 458.9 Celsius in K? answer: 732.05 3. heat is closely related to: a)temperature b)thermal energy c)force d)convection currents answer: b 4. What does a low efficiency score reveal about

    asked by Lisa on March 3, 2014
  28. Physics -- check answers please

    1. what is 67 K equivalent to in Celsius? answer: -206.15 C 2. what is 458.9 Celsius in K? answer: 732.05 3. heat is closely related to: a)temperature b)thermal energy c)force d)convection currents answer: b 4. What does a low efficiency score reveal about

    asked by Lisa on March 2, 2014
  29. FINITE!!!

    The Cutting Edge Knife Company manufacture paring knives and pocket knies each paring knife 3 man-hours of labor, 7 units of steal, and 4 unites of wood EAch pocket knife require 6 man hours of labor, 5 units of steel and 3 units of wood. The profit on

    asked by pickle123 on December 14, 2011
  30. chemistry

    A steel tank contains carbon dioxide at 34 celsius and is at a pressure of 13.0 atm. Determine the internal gas pressure when the tank and its contents are heated to 100 celsius

    asked by lavonne on October 18, 2010
  31. physics

    a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of

    asked by Anonymous on July 31, 2012
  32. physics

    a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of

    asked by Anonymous on July 31, 2012
  33. History, Social Studies

    People had known how to make steel since ancient times, but many historians claim steel caused a second industrial revolution at the end of the nineteenth century. Name the two innovators and the innovations in the production of steel that triggered the

    asked by Roxannedaly on March 19, 2012
  34. Eligugu high school science

    5 kg of steel is immersed in water at 2 degrees Celsius. what mass of water is required if the final temperature is 40 degrees Celsius?

    asked by Mandla on October 4, 2015
  35. Physics

    Steel is very stiff, and the Young's modulus for steel is unusually large, 2.0×1011 N/m2. A cube of steel 25 cm on a side supports a load of 85 kg that has the same horizontal cross section as the steel cube. What is the magnitude of the "normal" force

    asked by Janet on February 25, 2011
  36. Chemistry

    from a calorimeter experiment I got this calculation: Cm=30g(4.184 J/g(Celsius))(24 Celsius-20.8Celsius)/-25g(24 Celsius-99.6 Celsius) gives Cm= .107 J/g(Celsius) I have the answer here above, but when I calculate it I get different answers could someone

    asked by Saifeena on April 18, 2012
  37. Chemistry

    It has been proposed that wood alcohol, CH3OH, a relatively inexpensive fuel to produce, be decomposed to produce methane. Methane is a natural gas, commonly used for heating homes. is a decomposition from wood alcohol to methane and oxygen

    asked by Anmol on April 7, 2010
  38. Math

    Thomas needs to cut a piece of wood for a model airplane he is builing. He has four peices of wood: 5 ft, 4 ft, 6 ft, 3 ft long. If the length of wood he needs to cut √11 ft long, which peice of wood should be cut to have the least amount of unused wood.

    asked by anon on January 20, 2016
  39. Physics

    A spherical steel ball has a diameter of 2.540cm at 25 degree Celsius. (a)What is its diameter when the temperature is raised to 100 degree Celsius? (b)What temperature change is required to increase its volume by 1%?

    asked by Vanessa on April 8, 2010
  40. Physics

    A spherical steel ball has a diameter of 2.540cm at 25 degree Celsius. (a)What is its diameter when the temperature is raised to 100 degree Celsius? (b)What temperature change is required to increase its volume by 1%?

    asked by Vanessa on April 8, 2010
  41. physics

    a steel aircraft carrier is 370 meter long when moving through the icy north atlantic at a temperature of 2.0 degrees celsius. by how much the carrier lengthen when it is travelling in the warm mediterranean sea at a temperature of 21 degrees celsius?

    asked by sayla on April 21, 2014
  42. Calculus

    The management of the UNICO department store has decided to enclose a 917 ft2 area outside the building for displaying potted plants and flowers. One side will be formed by the external wall of the store, two sides will be constructed of pine boards, and

    asked by Anonymous on June 17, 2013
  43. Calculus

    The management of the UNICO department store has decided to enclose a 917 ft2 area outside the building for displaying potted plants and flowers. One side will be formed by the external wall of the store, two sides will be constructed of pine boards, and

    asked by Anonymous on June 18, 2013
  44. Physics

    Suppose that a steel hoop could be constructed to fit just around the earth's equator at a temperature of 20.0 Celsius. What would be the thickness of space between the hoop and the earth if the temperature of the hoop were increased by 0.200 C? Use

    asked by Mike on May 17, 2010
  45. Math

    The weather forecaster says it's 20 degrees Celsius in London but only 28 degrees colder in New York. What is the temperature in New York?

    asked by Satah on March 27, 2014
  46. physics

    A Carnot refrigerator is operating between thermal reservoirs with temperatures of 27.9°C and 0.0°C. a) How much work will need to be input to extract 13.7 J of heat from the colder reservoir? b) How much work will be needed if the colder reservoir is at

    asked by maria on January 4, 2012
  47. solid mechanics 1

    a load p is supported by a steel pin that has been inserted in a short wooden member hanging from the ceiling. the ultimate strength of the wood used is 60 MPa in tension and 7.5 MPa in shear, while the ultimate strength of the steel is 145 MPa in shear.

    asked by julia on October 7, 2011
  48. fun

    how much wood could a wood chuck chuck if a wood chuck could chuck wood?:) Thank you for using the Jiskha Homework Help forum. A woodchuck is a groundhog. The word itself is of Algonquian origin for this marmot. Since "chuck" means "discard" I doubt a

    asked by lainey cox on April 9, 2007
  49. English

    1. He is try to hit a piece of wood with an axe to cut it. (Is this correct?) 2. a piece of wood, two pieces of wood (Do we use these expressions? What about a wood, or two woods?)

    asked by John on June 18, 2009
  50. physics

    an archer shoots an arrow into a piece of wood. the arrow is traveling at 120km/h when it strikes the wood. the arrow penetrates 3.8cm into the wood before stopping. what is its average acceleration (in m/s squared) into the wood?

    asked by tommy on April 6, 2015
  51. Physics

    An archer shoots an arrow into a piece of wood. The arrow is traveling at 120 km/h when it strikes the wood. The arrow penetrates 3.8 cm into the wood before stopping. What is its average acceleration (in m/s2) into the wood?

    asked by Kim on March 19, 2012
  52. Physics

    an anchor shoots an arrow into a piece of wood. the arrow is traveling at 120 km/h when it strikes the wood. the arrow penetrates 3.8 cm into the wood before stopping. what is the average acceleration (in m/s^2) into the wood?

    asked by Fel on January 21, 2008
  53. Math

    The temperature at 6,000 m altitude is 11 degrees Celsius. At 4,000 m, the temperature is at 2 degrees Celsius. How much colder is it at 6,000 m than at 4,000 m? What is the difference in temperature?

    asked by Ellie on September 12, 2013
  54. Engineering

    5. Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The

    asked by David on February 12, 2009
  55. physics

    A copper container of mass 100g contains 500g of water. A steel paddle of mass 85g stirs the water. A pulley system operates the paddle. A) the mass (15kg) drops 2,4m, turning the steel paddle. Assume heat lost to surrounding is negligible. 1. Find the

    asked by Haiano on July 20, 2014
  56. mechanics of materials

    Select the correct answer.The change in length of a steel wire under an applied load can be halved by keeping all other conditions constant but using: A. A different material having a Young's modulus half that of steel B half the cross sectional area of

    asked by dmkp on February 21, 2013
  57. History

    Which was the most important effect of the Bessemer process? A. It allowed the production of more steel. B. It produced better steel. C. It made steel cheaper. D. It allowed factory production of steel.

    asked by Anonymous on February 10, 2019
  58. CHEM

    Factors which effect reaction rates. 1) Concentration 2) Temperature 3) Presence of a Catalyst 4) Surface area 5) Orientation You store food in a fridge to prevent spoilage. Which factor are you applying to slow the rate of reaction? Which one of the

    asked by ANON on September 21, 2009
  59. mechanics of materials

    The change in length of a steel wire under an applied load can be halved by keeping all other conditions constant but using:which of the following is correct A. a different material having a Young's modulus half that of steel B half the cross sectional

    asked by dmkp on February 22, 2013
  60. Science

    Classify each as a physical characteristic or chemical property. -wood burns -clay is brown -steel wool rusts -a paper clip is 3cm long

    asked by Brianna on September 17, 2014
  61. mechanics

    The change in length of a steel wire under an applied load can be halved by keeping all other conditions constant but using: A. a different material having a Young's modulus half that of steel B half the cross sectional area of the steel wire C half the

    asked by dmkp on February 24, 2013
  62. physics

    A steel ball is brought in contact with an identical ball of wood, so when will they be equally hot or cold? why?

    asked by mahesh patel on August 9, 2011
  63. SS8R - paragraph help!

    How did it make his money? He earned most of his fortune in the steel industry. In the 1870s, he founded the Carnegie Steel Company. Carnegie Steel Company was sold to the United States Steel Company in 1901 for $500 million is it good???? do i did more

    asked by Laruen on November 5, 2012
  64. physics

    Ten bags of top soil, each weighing 180 N, are placed on a 2.90-m long sheet of wood. They are stacked 0.50 m from one end of the sheet of wood, as shown below. Two people lift the sheet of wood, one at each end. Ignore the weight of the wood, how much

    asked by Jamison on January 2, 2013
  65. physics

    Ten bags of top soil, each weighing 150 N, are placed on a L = 2.95 m long sheet of wood. They are stacked 0.50 m from one end of the sheet of wood, as shown in Figure 8-27. Two people lift the sheet of wood, one at each end. Ignore the weight of the wood,

    asked by Jamison on January 2, 2013
  66. Thermodynamics

    Calculate the amount of expansion occurring when a steel rail 920.000 meters in length is heated from -10.000 to 410.000 degrees Celsius. ANS = m Steel = 12 * 10 ^-6 = 0.000012 Change in length = Original length * Coefficient of linear expansion *

    asked by Danny on July 4, 2013
  67. physics

    Q.a cube of wood 20cm on each side,floats in water so that 30% is above the surface of the water,and 70% is below.what is the density of the wood(justify the answer) i.what mass of lead mass has to be placed on the top of the block of wood,so that it wi;;

    asked by bindas on June 1, 2013
  68. physics

    Q.A cube of wood 20cm on each side,floats in water so that 30% is above the surface of the water,and 70% is below. i.what is the density of the wood(justify the answer) ii.what mass of lead mass has to be placed on the top of the block of wood,so that it

    asked by milky on June 1, 2013
  69. statistic

    One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts to be within ±0.005 inch of the length specified by

    asked by Anonymous on January 12, 2012
  70. Math

    Sara bought 2 boards of wood one board is 18 inches the other is 30 inches she wants to cut the wood into longest equal parts with no wood left over does Sara have enough wood for 10 equal size peices

    asked by Lori on February 3, 2016
  71. Physics

    This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency of a roller coaster

    asked by Angie Need Help ASAP NOW on December 4, 2013
  72. Physics

    This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency of a roller coaster

    asked by Angie Need Help ASAP on December 3, 2013
  73. Physics

    This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency of a roller coaster

    asked by Angie Need Help ASAP on December 4, 2013
  74. Chemistry

    A 50g vhuck of metal (c=0.506 j/g degrees celsius) is heated to 60 degrees celsius. It is then dropped into a calorimeter (c=1.40 j/g derees celsius, m - 5.0g) that contains 100g of liquid. The temperature of the liquid raises from 15 degrees celsius to 20

    asked by Renae on September 16, 2015
  75. Chemistry

    A 50g chuck of metal (c=0.506 j/g degrees celsius) is heated to 60 degrees celsius. It is then dropped into a calorimeter (c=1.40 j/g derees celsius, m - 5.0g) that contains 100g of liquid. The temperature of the liquid raises from 15 degrees celsius to 20

    asked by Renae on September 16, 2015
  76. Chemistry

    Calculate the joules of energy involved when 11 grams of water at 10.0 degrees Celsius cools and then freezes at 0.0 degrees Celsius. How many kilocalories are required to raise the temperature of 305 gtams silver from 30 degrees Celsius to 70 degrees

    asked by Palak on January 24, 2011
  77. english

    I'm suppose to indicate whether glass, steel, and wood are considered meaningful or not meaningful. I'm really not sure what this means. I'm going to guess, meaningful.

    asked by Tabby on December 16, 2007
  78. math

    Tomas needs to cut a piece of wood for a model airplane he is building. He has four pieces of wood: 5 feet, 4 feet, 6 feet, and 3 feet long. If the length of wood he needs to cut is 11 square root feet long, which piece of wood should he cut to have the

    asked by Anonymous on December 12, 2012
  79. Chemistry

    A 500kg steel boiler is used to convert 200kg of water into steam. Calculate the total energy required to heat both the steel and its' contents from 20.0°C to 100.0°C. The specific heat capacity of the steel is 0.528J/g°C. Heattotal= heat steel + heat

    asked by J.M. on September 23, 2006
  80. physics

    A piece of wood with mass m = 2.8 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 440 N on the wood. If the coefficient of static friction between the wood

    asked by holly on October 3, 2013
  81. Physics

    A piece of wood with mass m = 2.7 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 460 N on the wood. If the coefficient of static friction between the wood

    asked by Lily on October 19, 2012
  82. Physics

    The water from two buckets is mixed together. One bucket contains 5kg of water at 20 degrees Celsius and the other contains 1kg of water at 80 degrees Celsius. What is the final temperature of the mixture, assuming no heat is lost to the surroundings? A.

    asked by Vincent on November 5, 2015
  83. maths

    jerry bought a piece of wood 5m long. he used 3/8 of the wood for a frame. and 1/5 to fix a door. he used the remainder of the wood on a kitchen cupboard. what fraction did he use on the cupboard

    asked by indira on October 24, 2017
  84. maths

    The inner dimensions of wooden box are 2m, 1.2m, 0.75m. the thickness of wood is 2.5cm.find the cost of wood if the cost of wood of 1cubic metre is rs.5400

    asked by sandeep on January 25, 2017
  85. Physics 30

    A 6.8 g bullet travelling at 395m/s goes through a stationary block of wood in 4.3 *10^-4 and emerges at 102 m/s. what average force did the wood exert on the bullet ? how thick is the wood?

    asked by Arif on October 20, 2014
  86. Chemistry

    the air in a steel belted tire is at a gauge pressure of 29.8 psi at a temperature of 20 degrees celsius. After the tire is driven out fast on a hot road, the temperature in the tire is 48 degrees celsius. What is the tires new gauge pressure. Can someone

    asked by Lauren on February 12, 2011
  87. Chemistry

    You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 235.0 ppm and is initially uniform through the thickness of the

    asked by Anonymous on December 15, 2012
  88. science

    You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 152.0 ppm and is initially uniform through the thickness of the

    asked by fatine on December 16, 2012
  89. physics

    You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 206.5 ppm and is initially uniform through the thickness of the

    asked by y on December 15, 2012
  90. chemistry

    the density of a piece of wood is 0.638 g/cm3. The dimensions of the block of wood are 40.0 cm by 50.0 cm by 25.0 cm. What is the mass of the block of wood? Show all calculations.

    asked by sue on May 10, 2011
  91. physics

    A manufacturer wishes to produce crude benzene models for the chemistry department. The manufacturer plans to do this by punching regular hexagons out of steel. If the steel plate is 0.500 cm thick, What is the minimum shearing force needed to punch

    asked by sand on December 6, 2011
  92. Science

    Which choice describes how energy is transferred at the particle level through the process of conduction? A. The fast-moving particles in the colder material collide with the slow-moving particles in the hotter object. The collisions transfer energy from

    asked by Science on May 6, 2019
  93. physics

    if a steel flagpole get 5.1 mm taller when temperature increase by 5.0 degree celsius approximately how tall is the flagpole?

    asked by DD on April 12, 2012
  94. chemistry

    A calorimeter contained 75g of water at 16.95 degree Celsius. A 93.3g Iron at 65.58 degrees celsius was placed in it, giving a final temperature of 19.68 degrees Celsius for the system. Calculate the heat capacity of the calorimeter. specific heats are

    asked by help on September 15, 2018
  95. Physics

    A 2.3 kg steel block is at rest on a steel table. A horizontal string pulls on the block. The coefficient of static friction for steel on steel is 0.80 (page 163) while the coefficient of kinetic friction is 0.60 while the acceleration due to gravity is

    asked by Me on October 10, 2011
  96. physics

    As shown in the diagram, a bullet of mass 7.0 g strikes a block of wood of mass 2.1 kg. The block of wood is suspended by a string of length 2.0 m, forming a pendulum. The bullet lodges in the wood, and together they swing upward a distance of 0.40 m from

    asked by jose on January 4, 2016
  97. physics

    The specific heat capacity of steel is 445 Jkg K. How much energy is required to raise the temperature of a 0.410g of kettle which contains 1.2L of water from 20 degrees Celsius to boiling point?

    asked by Anonymous on July 23, 2010
  98. Chem

    The Fe2 (55.845 g/mol) content of a 2.271 g steel sample dissolved in 50.00 mL was determined by tiration with a standardized 0.100 M potassium permanganate (KMnO4, 158.034 g/mol) solution. The titration required 28.05 mL to reach the end point. What is

    asked by Cassie on March 25, 2015
  99. science

    Which structure is less likely to suffer damage during an earthquake: a high-rise, steel frame hotel built on sediments, or a wood frame house built on bedrock?

    asked by . on November 29, 2009
  100. physics

    A faulty Celsius thermometer read 0.7degrees Celsius at melting point of pure ice and 99.5degrees Celsius at boiling point of water at normal pressure. What is the correct temperature when it reads 30 degrees Celsius

    asked by precious on August 5, 2017