1. Chemistry

    A scuba diver 60ft below the ocean’s surface inhales 50.0 mL of compressed air from a scuba tank with an initial pressure of 3.00 atm and temp of 8 degrees Celsius. What is final pressure, in atmospheres, in the lungs when the gas expands to 150.0 mL at

    asked by Nastasha on May 7, 2015
  2. Chemistry

    A sample of argon gas has a volume of 735 mL at a pressure of 1.20 atm and a temp of 112 degrees Celsius. What is the final volume of the gas, in milliliters, when the pressure and temp of the gas is changed to A.) 658 mmHg and 281K? B.) 0.55 atm and 75

    asked by Nastasha on May 7, 2015
  3. Physics waves- check answers please

    I am not too sure if my answers are correct. Here are the questions: 1. A student standing near a brick wall claps her hands and hears the echo 0.250 s later. If the speed of sound was 340.0 m/s, how far from the wall was she? For this question I got 85 m.

    asked by Liz on April 21, 2014
  4. 9th grade

    Use the following Info. At sea level the speed of sound in air is linearly related to air temp. If 35 degrees Celsius sound travels at a rate of 352meters per sec. if 15degrees Celsius sound travels at 340 meters per sec. How would i write a linear

    asked by Kaela on November 15, 2010
  5. Chemistry URGENT

    can someone please tell me what formula's to use for the 2 following chemistry problems. 1. Calculate the solubility of potassium bromide at 23 degrees Celsius. hint. Assume that the solubility increases by an equal amount for each degrees between 20

    asked by jazz on April 28, 2014
  6. Physics

    On a 20 degree Celsius day, a hot air balloon is estimated to lift 600 kg to carry you, two friends, the operator and his dog, along with the weights of the balloon and some food and drinks. That means that the hot air in the balloon has to be somehow 600

    asked by Celine on January 18, 2019
  7. Physics

    A sound wave is traveling in warm air when it hits a layer of cold, dense air. If the sound wave hits the cold air interface at an angle of 23 degree angle, what is the angle of refraction? Assume that the cold air temperature is -10 degrees C and the warm

    asked by melissa on December 13, 2012
  8. physcial science

    What are the wavelength limits of the audible range of the sound spectrum? (Use the speed of sound in air. The speed of sound in air is 344 m/s. The audible range of the sound spectrum contains frequencies as low as 30 Hz and as high as 25 kHz.)

    asked by Christine on June 23, 2015
  9. writting a program

    Speed of Sound. Sound travels through air as a result of collisions between the molecules in the air. The temperature of the air affects the speed of the molecules, which in turn affects the speed of sound. The velocity of sound in dry air can be

    asked by sarah on February 23, 2012
  10. Physics waves- check answer please

    I would like to know if my answer is correct. Thanks in advanced! A person with their head sideways in the water sees a beaver slap its tail on the lake surface 1.2 km away. What is the time difference between the sound heard in the ear listening in the

    asked by Liz on April 22, 2014
  11. Science

    The difference between the speed of sound in air at 0 degrees Celsius and the speed of sound in air at 20 degrees Celsius is that A) cooler air molecules move more slowly and respond less readily to the energy of a sound wave B) cooler air molecules move

    asked by Need Urgent Help Please on December 31, 2015
  12. Math 3

    The mean surface temp of the moon is 107 degrees celsius.if the mean surface is -153 degrees celsius. How much warmer is it in the day than at night time?

    asked by Jenny 2 on April 17, 2014
  13. Physics

    At what temperature, in degrees Celsius, is the speed of sound in air 341 m/s?

    asked by Emily on December 4, 2017
  14. Physics

    A bat emits a sound whose frequency is 83.2 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 40.5 oC, so the speed of sound is not 343 m/s. Assume that air behaves like an ideal gas, and find the wavelength of the

    asked by Orla on January 15, 2013
  15. physics

    1) Sound propagating through air at 30 degree Celsius passes through a vertical cold front into air that is 40 degree Celsius. If the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary? (2) What is the

    asked by Sandhya on November 9, 2008
  16. urgent

    How much heat energy is required to raise the temp of 5 kilograms of coal from 20 degrees celsius to 220 degrees celsius? A 314 J B 6,573 J C 1,314,718 J D 4,187,000 J You asked this question already. See my other posted answer.

    asked by alf on August 3, 2005
  17. Chemistry

    How much time is required for a sound to travel 1 mile if the air temperature is: 0.0 Degrees Celsius 20.0 Degrees Celsius 40.0 Degrees Celsius 80.0 Degrees Celsius

    asked by Lucy on March 12, 2015
  18. Chemistry

    Find the enthalpy of combustion of magnesium using Hess' law given the following data (assume that exactly 100.0 mL of HCl was used in each trial and that HCl is in excess) Magnesium/HCl reaction: Grams of Mg= 0.244g Initial temp= 32.2 degrees celsius

    asked by Liz on July 21, 2014
  19. Chemistry

    1. Calculate the number of molecules in a deep breath of air whose volume is 2.15 L at body temperature, 36 degrees Celsius, and a pressure of 740 torr. 2.A fixed quantity of gas at 24 degrees Celsius exhibits a pressure of 740 torr and occupies a volume

    asked by Emory on November 2, 2009
  20. physical science

    When the temperature of the air is 25 degrees Celsius, the velocity of a sound wave traveling through the air is approximately A. 332 m/s B. 320 m/s C. 357 m/s D. 347 m/s

    asked by Unmei on June 5, 2014
  21. Chemistry

    At 28.4 g sample of aluminum is heated to 39.4 degrees Celsius and then is placed in a calorimeter containing 50.0g of water. Temp of water increases from 21.00 degrees Celsius to 23.00 degrees Celsius. What is the specific heat of aluminum?

    asked by Tori on May 7, 2015
  22. Math

    The speed of sound in air at sea level at 32 degrees Fahrenheit is 1088 ft/s. If that represents only 22.04% of the speed of sound in ice-cold water, what is the speed of sound in ice-cold water, to the nearest whole number? what i did: 22.04/100 = 32/x i

    asked by Katy on January 16, 2015
  23. science

    I'm having trouble with this homework question, I don't really trust sites like these but I don't have any other choice, so here it goes: The sound of speed in water(25 degrees Celsius) is traveling at 1,500m/s. How far can sound travel in water in 2.5

    asked by Bailey on February 1, 2011
  24. 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
  25. Chemistry

    I had to perform an experiment for the freezing point depression in which we had to determine the frezzing points of water as a pure solvent, sodium chloride, sucrose, and ethylene glycol. We had to work with a partner so I completed the experiment for

    asked by Hannah on February 18, 2012
  26. Chemistry 3A

    the pressure of hydrogen gas in a constant volume cylinder is 4.25atm at 0 degrees celsius. what will the pressure be if the temp. is raised to 80 degress celsius? Also do we have to first convert celsius to kelvin?

    asked by Gurjot on December 4, 2012
  27. Math

    Is this correct? The inside of your refrigerator might be set to a temperature of about____. My answer is 2.9 degrees Celsius because the choices are: A) -2.9 degrees Celsius B) 29 degrees Celsius C) 2.9 degrees Celsius D) 43.5 degrees Celsius. Thanks.

    asked by B.B. on September 6, 2009
  28. Calc

    Recent studies indicate that the average surface temp. of the earth has been rising steadily. Some scientists have modeled the temp. by the linear function T= 0.02t + 8.50, where T is temp. in degrees Celsius and t represents years since 1900. What do the

    asked by Chelsea on September 20, 2010
  29. Chemistry 111

    A gas occupies a volume of 256mL at a pressure of 250torr at 32 degrees Celsius. Calculate the pressure (in atmosphere)if the volume is reduced to 156mL and the temp is increased to 62 degrees Celsius. I really need the formula that I would be using. I am

    asked by Lotty on December 3, 2010
  30. math

    when the temperature is 68 degrees F, the speed of sound in the air is approximately 343 meters per second. Approximately how many kilometers does sound travel in five seconds

    asked by I NEED HELP FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! on May 13, 2014
  31. Physics

    A tire contains air at a pressure of 2 bar at 15 degrees Celsius. If the tires volume is unchanged, what will the air pressure in it be when the tire warms up to 40 degrees Celsius as the car is driven?

    asked by Diana on November 2, 2011
  32. Physical Science

    A tire contains air at a pressure of 2.8 bar at 10 degrees Celsius. If the tires volume is unchanged, what will the air pressure in it be when the tire warms up to 35 degrees Celsius as the car is driven?

    asked by Jason (please help) on September 18, 2011
  33. Physics-Need Help fast!

    Part 1 A 3m long pipe is in a room where the temperature is 20 degrees C. What is the frequency of the first harmonic if the pipe is closed at one end? Part 2 sound traveling in air at 23 degrees C enters a cold front where the air temp is 2 degrees C. If

    asked by Megan on July 27, 2011
  34. Science

    What will the sound of speed be in air if temp is 10 degrees Celsius.this is crickets looking for e plantation on equation

    asked by Lucy on March 4, 2015
  35. physics!!!

    A copper rod is given a sharp compressional blow at one end. The sound of the blow, traveling through air at -2.79 degrees Celsius, reaches the opposite end of the rod 9.39ms later than the sound transmitted through the rod. What is the length of the rod?

    asked by Ashleigh on November 8, 2010
  36. Physics waves- check answer please

    I would like to know if my answer is correct. Thanks in advanced! A person with their head sideways in the water sees a beaver slap its tail on the lake surface 1.2 km away. What is the time difference between the sound heard in the ear listening in the

    asked by Liz on April 21, 2014
  37. physics

    The speed of sound in air varies with the temperature and humidity of the air. In dry air at 20 degrees Celsius, the speed of sound is approximately 343 m/sec. A closed tube resonates with a node at each end for a sound wave in air. What is the length of

    asked by Ann on February 19, 2014
  38. Physical Science

    The air temperature on a certain day is 86 degrees F A)Convert to Celsius? B) Calculate the sound of speed in air? C)When a 653Hz tornado siren is turned on, the sound takes 2.3s to reach an observer. How far is the observer from the main siren, and what

    asked by Charles on March 2, 2014
  39. Science

    6. The difference between the speed of sound in air at 0 degrees Celsius and the speed of sound in air at 20 degrees Celsius is that A. Cooler air molecules move more slowly and respond less readily to the energy of a sound wave B. Cooler air molecules

    asked by anonymous on April 23, 2020
  40. physical science

    whats the speed of sound in air at 30 degrees Celsius.

    asked by Raja on July 7, 2011
  41. Chemistry

    For the equation q=cΔt, q=100KJ, initial temp=20 degrees celsius, final temp=31.4 degrees celsius and I need to find c. Do I need to convert the q value from KJ to J?

    asked by Liz on July 22, 2014
  42. chemistry

    Calculate the molar enthalpy change for this reaction: HCl(aq 1.00M) + NaOH -> NaCl(aq,.500M)+ H2O Initial temp: 22.15 degrees Celsius Extrapolated temp: 25.87 degrees Celsius DT: 3.72 degrees Celsius Notes: Calculate the enthalpy change for this reaction.

    asked by Failure on November 10, 2015
  43. chemistry

    calculate the energy requiered to raise the temp of 1.0 mol Ag by 1.0 degrees celsius (molar heat capacity of silver) answer in j/mol(degrees celsius) what are the steps to this problem? how do I find the second temp value?

    asked by Avonlea on November 6, 2007
  44. Physics

    A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of

    asked by Phil on January 8, 2009
  45. Chemistry

    How much heat energy is required to heat up 50.0 grams of water from 20.2 degrees Celsius to 34.2 degrees Celsius? I want o use the Q=mc(change in temp) formula but I am only given the m and difference in temp in this question so I am not sure of what I am

    asked by Kaitlyn on September 4, 2016
  46. Physics - Fluids

    A cylindrical diving bell 3.0 m in diameter and 4 m tall with an open top of 25 degrees celsius, and the air temp 220 down is 5 degrees celsius. The density of seawater is 1025 kg/m^3. How high does the sea water rise in the bell when the bell is

    asked by Peter on December 17, 2008
  47. physics

    A sound wave of frequency 1310 Hz., propagating through air at 0 degrees Celsius, has a pressure amplitude of 11.0 Pa. What is the maximum particle speed (in meters/second)?

    asked by tom on June 25, 2014
  48. math

    The temperature in degrees Fahrenheit is equal to 32 more than 9/5 times the temperature in degrees Celsius. One day the high temp. was 95 degrees Fahrenheit. What was the high temp. in degrees celsius? I did 32+(9/5*35) 32+63=95 so my answer is 35 degrees

    asked by B6 on March 27, 2013
  49. College Chemistry

    When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air

    asked by Abbey on April 18, 2013
  50. College Chemistry

    When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air

    asked by Abbey on April 18, 2013
  51. College Chemistry

    When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air

    asked by Abbey on April 18, 2013
  52. Physics also

    A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of

    asked by Phil on January 7, 2009
  53. Physics - Submerged Cylinder

    A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of

    asked by Phil on January 7, 2009
  54. PHYSICS 102E

    1. How much ice at -10 degrees Celsius is required to cool a mixture of 0.1 kg ethyl alcohol and 0.1 kg water from 20 degrees Celsius to 0 degrees Celsius? 2. Find the heat produced by 1 KW heating element in one hour. 3. A 3g lead bullet at 30 degrees

    asked by Akitsuke on December 14, 2008
  55. physics

    On a cold winter day when the temperature is -20 degrees celsius, what is the amount of heat needed to warm internal body temp(37) the .5 L of air exchanged with each breath? Specific heat of air is 1020 J/(kg K) and that 1.0L air has a mass of 1.3g.

    asked by Joe on November 30, 2009
  56. Physics sph 212

    A person takes in a breath of 0 degrees celsius air and holds it until it warms to 37 degrees celsius. The air has an initial volume of 0.700L and a mass of 9.00*10^-4kg. Determine a. the work done by the air on the lungs if the pressure remains constant

    asked by Tiera on April 5, 2012
  57. physics

    A bat emits a sound whose frequency is 83.6 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 36.0 oC, so the speed of sound is not 343 m/s. Assume that air behaves like an ideal gas, and find the wavelength of the sound

    asked by Anonymous on January 21, 2013
  58. Biology

    Hey I am doing a lab, the link is down h t t p : //w w w . sd67 . bc . ca/schools/salc/biology%2012/module%20c%20-%20human%20biology/unit%2010%20-%20respiratory%20system/Homeostasis%20Lab .pdf And I really would like help with #1 My data is right here Pre

    asked by Shreya on February 7, 2013
  59. Chemistry

    A block of copper at 100 degrees Celsius comes in contact with a block of aluminum at 20 degrees Celsius. The final temp of the blocks is 60 degrees Celsius. What are the relative masses of the blocks?

    asked by Sue on March 1, 2012
  60. chemistry(please check formula)

    how much energy i kj is required to change the temp of 1.00 kg of fe from 25.0 degrees celsius to 1515 degrees celsius? so it would be q= (.449)(1.00)(1490)-correct?

    asked by danielle on April 4, 2010
  61. physics

    The speed of propagation of a sound wave in air at 27 degrees Celsius is about 350 m/s. Calculate, for comparison, v_rms for nitrogen (N2) molecules at this temperature. The molar mass of nitrogen is 28.0 g/mol.

    asked by Jen on November 15, 2007
  62. science

    How much heat in joules is needed to raise the temp of 6.5L of water from 0 celsius degrees to 70 degrees celsius

    asked by Keni on February 2, 2011
  63. chemistry

    how much energy i kj is required to change the temp of 1.00 kg of fe from 25.0 degrees celsius to 1515 degrees celsius?

    asked by danielle on April 4, 2010
  64. 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
  65. Physics

    How long would it take a car engine, say 500 pounds of iron, to cool from 1,200 degrees F (exauhst manifold temp) to air ambient temp. of 75 degrees F.

    asked by David on August 10, 2012
  66. 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
  67. college physics

    have a couple of questions about my homework and it's due at midnight tonight: 1. On a hot summer day, the temperature of air in Arizona reaches 115°F. What is the speed of sound in air at this temperature? (Enter your answer to four significant figures.

    asked by Karrine on December 15, 2012
  68. 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
  69. science

    if we mix 2 substance A and B of 30 degrees celsius and 70 degrees celsius respectively.what will be the temp of the mixture

    asked by Nagham on April 6, 2011
  70. Chemistry 3A

    a sample of methan gas, CH4, occupies 4.50L at a temp of 20.0 degrees celsius. if the pressure is held constant, what will be the volume of gas at a 100 degrees celsius

    asked by Gurjot on December 3, 2012
  71. Chemistry (check formula please)

    how much energy (in kJ) is required to change the temp of 1.00 kg of Fe from 25.0 degrees celsius to 1515 degrees celsius? the specific heat capacity of iron is 0.449 J/g*K. this is the answer i got. q=(.449)(1.00)(1490)= 669.01 kJ

    asked by Danielle on April 5, 2010
  72. Socials

    Temperature decreases approximately 1degree Celsius for each 150 metres increase in altitude. 1. The temp at sea level is 25 degree Celsius A.) what will the temp be 1200m up the mountain? B.) what will it be at the top? (2250m) 2. The temp at the top of

    asked by Roma on February 17, 2014
  73. Chemistry

    Determine if the solubility would increase, decrease, or stay the same: 1) A saturated solution of sugar water is cooled from room temp to 0 degrees Celsius. 2) A solution of ocean water with dissolved oxygen is heated from 10 degrees Celsius to 15 degrees

    asked by Margaret on February 19, 2013
  74. Chemistry

    In the classroom, we reacted Mg(s) + 2HCl -> MgCl2(aq) + H2 (g) (0.31 g of Mg(s), and 99.46 g of HCl) Initial temp. = 22.5 celsius, max. temp. 36.0 celsius and MgO(s) + 2HCl -> MgCl2(aq) + H2(g) (1.00 g of MgO(s) and 97.71 g of HCl) Initial temp. 22.0

    asked by Kara on March 27, 2011
  75. Math

    The air temperature is -10 degree Celsius. With the wind blowing at a speed of 15 km/h, this temperate feels like -17 degrees Celsius. How many degrees does the temperature change because pf the wind chill?

    asked by Anna on September 6, 2014
  76. Math - Urgent

    The air temperature is -10 degree Celsius. With the wind blowing at a speed of 15 km/h, this temperate feels like -17 degrees Celsius. How many degrees does the temperature change because pf the wind chill?

    asked by Anna on September 7, 2014
  77. Chemistry

    HELP PLEASE. I have no idea how to set this up. I tried using the q=mc(change in temp) equation but its not working out. A 59.8 g block of an unknown metal at 87.5 degrees Celsius was dropped into an insulated vesssel containing approximately 33 g of ice

    asked by Taylor on September 30, 2014
  78. 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
  79. 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
  80. Chemistry

    The air in a cylinder of a diesel engine occupies 1.00 L at 30 degrees celsius and 1.00 atm. What is the pressure in the cylinder when the air is compressed to 0.0714 L (14:1 compression ratio) and heats to 480 degrees celsius? When the fuel explodes in

    asked by Eve on May 22, 2016
  81. Chemistry

    20.7mL of ethanol (density=0.789g/mL) initially at 8.2 degrees Celsius is mixed with 37.1 mL of water (density=1.0g/mL) initially at 25.7 degrees Celsius in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?

    asked by Katie on February 7, 2012
  82. college

    the relationship between farenheit and celsius temp can be approximated by an equation of the form y=mx+b where x is degrees farenheit and y is degrees celsius. find the equation if the two ordered pairs that satify this equations are (50,10) and (86,30)

    asked by tonya on June 29, 2010
  83. Chemistry

    How would I find the molality of NaCl with the following information? initial temperature= 98degrees celsius final temp=100 degrees celsius. Kbp(water)=0.512

    asked by Hannah on February 13, 2012
  84. Chemistry(Please help, thank you!)

    How would I find the molality of NaCl with the following information? initial temperature= 98degrees celsius final temp=100 degrees celsius. Kbp(water)=0.512

    asked by Hannah on February 19, 2012
  85. Chemistry

    20.0 mL of ethanol initially at 7.2 degrees Celsius is mixed with 31.7 mL of water initially at 28.9 degrees Celsius in an insulated beaker. Assuming no heat is lost, what is the final temp? I did not include the density, but I solved for mass, and have

    asked by Jennifer on January 8, 2016
  86. Geog-Adiabatic rates

    Given a lapse rate of 3 degrees C/1000 meters and a temp of 20 degrees C at 0 meters: A.What is the air sitting at 3,000 meters elevation?___degrees C B.If a sample of air were lifted from 0 meters to 3,000 meters elevation, what would its new temp

    asked by Sarah on March 22, 2008
  87. Adiabatic rates(Geography)

    Given a lapse rate of 3 degrees C/1000 meters and a temp of 20 degrees C at 0 meters: A.What is the air sitting at 3,000 meters elevation?___degrees C B.If a sample of air were lifted from 0 meters to 3,000 meters elevation, what would its new temp

    asked by Sarah on March 23, 2008
  88. Chemistry

    An insulated beaker contains 250g of water at 25 degrees celsius. Exactly 41.6g of a metal at 100 degrees celsius was dropped in the beaker. The final temperature of the water was 26.4 degrees celsius. Assuming that no heat is lost in any other way,

    asked by Hannah on January 22, 2012
  89. Chemistry

    50mL of water at 46.9 degrees Celsius were mixed with 50mL of water at 25.2 degrees Celsius in a calorimeter also at 25.1 degrees Celsius. the final temp was 30.1 Celsius. assuming that neither the desity of water nor its specific heat capacity changed

    asked by romeena on November 14, 2012
  90. Intermediate algebra

    Hello, I am kind stuck on this question In the lab you discover a relationship between the temperature of the air and the speed of sound. You find the speed of sound is never lower than 331 m/s and increases by 60% of the current temperature. a. What is

    asked by Jennifer on November 28, 2011
  91. Physics HELP!!

    The sound intensity of 1.2x10-12J/m2s is the threshold of hearing for humans. What is the amplitude of the motion of the air molecules if the speed of sound in the air is 343m/s and the density of air is 1.28kg/m^3? Take the frequency of the air molecules

    asked by rory on November 24, 2012
  92. physics ..PLEASE HELP ASSIGN DUE SOON :(

    The sound intensity of 1.2x10-12J/m2s is the threshold of hearing for humans. What is the amplitude of the motion of the air molecules if the speed of sound in the air is 343m/s and the density of air is 1.28kg/m^3? Take the frequency of the air molecules

    asked by joane on November 26, 2012
  93. Algebra

    Tire pressure is directly proportional to temp on a temp scale where zero degrees is absolute zero. given that temp in degrees celcius and degrees Fahrenheit are related by the formula F=9/5C +32 and absolute zero is -273.15C, by what % does tire pressure

    asked by Grace on October 18, 2016
  94. Chemistry

    A 100.0-mL sample of air is collected at 21 degrees Celsius and 772 mm Hg. What is the volume of air at STP? I know that I have to change deg. Celsius to K and mm Hg to atm. I'm stuck on what formula I should use... Should I use PV=nRT?

    asked by Jason on December 10, 2015
  95. physics

    A bullet having a velocity of 680 m/s hits a target 510 m away. If the temp. of the air was 18 degrees celsius, how long after the bullet was fired did she hear it hit the target?

    asked by Anonymous on April 29, 2010
  96. physics

    The speed of sound in air at 20 degrees C is 343m/s. This corresponds to a speed of ____mi/hr.

    asked by Ajmber on October 3, 2011
  97. Statistics

    During September, the average temp of laurel lake is 64.2 degrees. the standard deviation is 3.2 degrees. Assume the variable is normally distributed. For the randomly selected day, find the probability that the temp will be a. above 62 degrees b. below 67

    asked by Jasmin on October 21, 2013
  98. Stats

    On Tuesday September 27, 2016 the high temperature increased to 36.7 degrees Celsius (98 degrees Fahrenheit). What is the probability that we observe a temperature of 36.7 degrees Celsius or higher given that the average temperature is 27 degrees Celsius

    asked by Kleena on October 8, 2016
  99. Chemistry

    I don't understand this: For the temperature vs time graph for heat and changes of state. The graph starts at -2.1 degrees C The heat of fusion is at 2.0 degrees C The heat of vaporization is on 101.0 degrees C. The graph ends at 103.0 degrees C. So to get

    asked by Amy~ on June 10, 2010
  100. Science

    Is the answer 26 celsius? Is it possible that the temp is greater than 25 celsius? A 500 mL bottle of water, which is at 25 degrees C, is poured over 120 g of ice at -8 degrees C. What will be the final temperature of the water when all the ice has melted.

    asked by Bert on January 21, 2010