Substances A and B, initially at different temperatures, come in contact with each other and reach thermal equilibrium. The mass of substance A is twice the mass of substance B. The specifi c heat capacity of substance B is twice

13,681 results
  1. science

    Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can be separated by physical

  2. History

    Please help within the hour thanks. Which factors kept invaders out of Arabia? A.Hot temperatures and deserts B.Cold temperatures and mountains C.Lack of water and cold temperatures D.Lack of water and mountains

  3. Science

    which two conditions are required for cloud formation? A) high humidity and warm temperatures. B) high humidity and cool temperatures. C) warm temperatures and the presence of particles. D) cool temperatures and the presence of particles. Is there a link I

  4. chemistry

    The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is:

  5. science

    Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means B. both substances have a set ratio of atoms that can be separated by physical

  6. chemistry

    Liquid nitrogen, which has a boiling point of 77 K, is commonly used to cool substances to low temperatures. How much energy must be removed from 1.4 kg of gaseous nitrogen at 77 K for it to completely liquefy? Assume the latent heat of liquid nitrogen is

  7. Chemistry - Liquid Methane?

    "The planets Uranus and Neptune are so far from the Sun that temperatures are low enough for atmospheric methane, CH4, to condense and form clouds. How is it possible for methane, a nonpolar substance, to exist in this liquid state?" I want to say it's

  8. phys

    The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is: ans is 400 K how?

  9. Geography

    Which of the following climate conditions would best support a tropical rain forest ecosystem? A. dry air and cold temperatures B. dry air and hot temperatures C. moist air and cold temperatures D. moist air and hot temperatures I really need help so so

  10. Algebra

    The formula for converting Celsius temperatures to Fahrenheit temperatures is F= 9/5C + 32 where F is the temperature in degrees Fahrenheit and C is the temperature in degrees Celsius. Which formula could be used to convert Fahrenheit temperatures to

  11. science

    A chemist mixes two liquids together. The reaction produces a gas and a solid. According to the law of conservation of mass, what should the chemist observe when she compares the total masses of the substances before and after the reaction? (1 point) A.The

  12. Chemistry - Final Temperature

    An unknown mass of each of the following substances, initially at 23.0C, absorbs 1910 J of heat. The final temperature is recorded as indicated. Find the mass of each substance. sand (Tf=62.0C) ethanol (Tf=44.1C) water (Tf=32.1C)

  13. science

    Why is infrared radiation an important thing to monitor for understanding climate change?(1 point) If infrared is absorbed instead of leaving the atmosphere, temperatures will rise. If infrared is absorbed instead of striking Earth, temperatures will rise.

  14. Chemistry

    assume equal masses of the following substances, all of them at 20.0 degrees C and exposed to the same source of heat simultaneously. Which substance will reach a temp of 35.0 degress faster? aluminium sp 0.900 lead sp 0.128 titanium sp 0.523 tin sp 0.222

  15. AP Chemistry

    Create a visual representation of ionic substances to connect the microscopic structure of ionic substances to each of the following macroscopic properties. a. solubility in polar compounds. b. Brittleness. Can I please get help, I am so confused! Thanks

  16. science

    The two systems shown below are identical except for the rod connecting the two beakers. Initially the temperatures of the beakers are as follows: Beaker A = 88°C Beaker B = 42°C Beaker C = 88°C Beaker D = 42°C Four minutes later the temperatures are

  17. physics

    A 0.41kg football that is initially at rest acquires a velocity of 35m/s when it is kicked. If the kicker's boot remains in contact with the ball for 0.08s, what is the average force of the kick?

  18. science-MS.SUE PLZ HELP

    Identify the following substances as pure substances, elements, compounds, mixtures, or solutions (answers may include more than one classification): mud, copper, salt water, carbon monoxide

  19. physics

    A 0.41 kg football that is initially at rest acquires a velocity of 35 m/s when it is kicked. If the kicker's boot remains in contact with the ball for 0.08 s, what is the average force of the kick?

  20. science physics

    Two locomotives approach each other on parallel tracks. Each has a speed of v = 95 km/h with respect to the ground. If they are initially d = 7.5 km apart, how long will it be before they reach each other?

  21. Algebra

    The formula C = 5/9(F-32) can be used to convert Fahrenheit temperatures to Celsius temperatures. a. Gold is liquid for Celsius temperatures C such that 1063 degrees (less than or equal to) C < 2660 degrees. Find a comparable inequality for Fahrenheit

  22. chemistry

    A process which is unfavorable with respect to enthalpy, but favorable with respect to entrophy a)could occur at high temperatures, but not at lower temperatures b)could not occur regardless of temperature c)could occur at any temperature d)could occur at

  23. Climate

    Which of the following statements about climate is FALSE? A. Deserts usually occur at very low altitudes. B. Temperatures usually decrease with altitude. C. Coastal temperatures are usually cooler than inland temperatures. D. The southern hemisphere is

  24. Chemistry

    Some synthetic substances are exactly the same as substances found in nature. Why would scientists synthesize something that already exists?

  25. Chemistry Help!!

    why is it impossible to draw a distinction between natural substances and chemical substances?

  26. physics

    Question 1) A rock is dropped from the top of a 100 meter tall cliff. A. ) How long will it take for the rock to reach the ground. B) What will be the velocity of the rock when it hits the ground? C) How long will it take for the rock to reach the ground

  27. Chemistry

    b) Write 3 – 4 sentences to describe the first law of thermodynamics and use it to describe what happens when two substances at different temperatures come in contact with each other. I know the first law states that "energy can neither be created

  28. Science

    Both carbon dioxide and water are pure substances. How are they similar to each other? A.) both substances have a set ratio of atoms that cannot be separated by physical means. B.) both substances have a set ratio of atoms that can be separated by physical

  29. Physics

    A golf ball has a mass of 0.05 kg. It is initially at rest, but after being struck by a golf club it is given a speed of 30 m/s. The club and the ball are in contact for 2 ms (.002 seconds). a) What is the average force acting on the ball? b) What is the

  30. Chemistry Help!!

    why is it impossible to draw a distinction between natural substances and chemical substances?

  31. chemistry

    A 25 g gold nugget with an initial temperature of 60 °C is dropped into an insulated cup containing 100 ml of water initially at a temperature of 5°C. What is the final temperature after thermal equilibrium is established? Refer to Table 3.4 of the text

  32. weather

    Which of the following is true regarding clouds? a. They increase temperature minimums and maximums b. They cover about 5% of the Earth’s surface c. They increase nighttime temperatures and decrease daytime temperatures d. They decrease nighttime

  33. Algebra. NEED HELP ASAP PLEASE

    The formula F=(9/5)C+ 32 F=95C+32 may be used to convert Celsius temperatures to Fahrenheit temperatures. What is the range of Celsius temperatures if the Fahrenheit range is -65°F to 60°F.

  34. statistics and probability

    6. MGSE6.SP.5: Kendra recorded the low temperatures (in degrees Fahrenheit) in her city each day for 8 consecutive days. Her data are shown. 28, 15, 22, 30, 18, 27, 25, 2 Which Statements are true about the data? A. 50% of the temperatures are between 16.5

  35. Physics

    A cylinder with moment of inertia 22.1 kg m2 rotates with angular velocity 5.71 rad/s on a frictionless vertical axle. A second cylinder, with moment of inertia 28.3 kgm2, initially not rotating, drops onto the first cylinder and remains in contact. Since

  36. child development

    (Penn Foster) 1- Neueon development and elaboration, which occurs between birth and age 10, is prompted by: A -aural prompts from the famiy school and environment. B-physical movement on the part of the child C- Intake of foods rich in vitamins and

  37. Physics

    ball 1 with an initial speed of 10 m/s collides elastically with stationary balls 2 and 3 that are initially in contact with each other. the centers of balls 2 and 3 are on a line perpendicular to the initial velocity of ball 1. the three balls are

  38. algebra

    Here are yesterday's high temperatures (in Fahrenheit) in 13 U.S. cities. 50 , 56 , 56 , 58 , 60 , 61 , 63 , 66 , 67 , 71 , 71 , 80 , 83 Notice that the temperatures are ordered from least to greatest. Give the five-number summary and the interquartile

  39. Physical Science

    Hello! Thanks for checking my question out! ____ 4. Water is a compound because it (1 point) a) can be broken down into simpler substances. b) always has two hydrogen atoms for each oxygen atom. c) is made of water atoms joined together. d) both the first

  40. social studies

    Which of the following is a reason why historians may want to consider opinions as well as facts reported by a source? ------=my answer 1. A. A source that historians trust is likely to have true opinions. B. The opinions may provide clues to the source's

  41. Chemistry

    Substances A and B, initially at different temperatures, come in contact with each other and reach thermal equilibrium. The mass of substance A is twice the mass of substance B. The specifi c heat capacity of substance B is twice the specifi c heat

  42. Chemistry

    Two substances, gold and granite, initially at different temperatures, come into contact and reach thermal equilibrium. The mass of gold is 20.2 g and its initial temperature is 58.2 ∘C. The mass of granite is 29.1 g and its initial temperature is 20.1

  43. Physics

    Two copper blocks, each of mass 2.03 kg, initially have different temperatures,t1 = 15° C and t2 = 30° C. The blocks are placed in contact with each other and come to thermal equilibrium. No heat is lost to the surroundings.

  44. Science

    Why do non-polar substances tend to boil at relatively low temperatures?

  45. world geography

    In Iceland and the British Isles, the ocean creates a __________________ . a. mild temperatures c. hot and humid temperatures b. cold and wet temperatures d. hot and dry temperatures

  46. math

    Brianna recorded the high temperatures in her town each day for 8 consecutive days. Her data is shown. 78, 65, 72, 80, 68, 77, 75, 52 Which is not a true statement about the data? > 50% of the temperatures are between 66.5 and 77.5 degrees. > 75% of the

  47. science

    Suppose you are presenting a science project that compares the temperatures of several different substances. Would you present your findings using degrees Farenheit, Celcius, or Kelvin? Explain.

  48. Physics

    A brick is initially 12.90 cm high and an aluminum can is initially 12.91 cm high. By how much must their temperatures be raised in order for the brick and the can to have exactly the same height?

  49. ORGANIC CHEMISTRY

    WHAT ARE THE DEFINITION OF DRYING AGENT;DELIQUSCENT SUBSTANCES;HYGROSCOPIC SUBSTANCES;EFFLORESCENT SUBSTANCES.

  50. math

    Consider the following method of estimating Fahrenheit temperatures given Celsius temperatures (which was stated earlier in this section): To estimate the Fahrenheit temperature for a given Celsius temperature, double the Celsius temperature and add 30.

  51. science

    A chemist mixes two liquids together. The reaction produces a gas and a solid. According to the law of conservation of mass, what should the chemist observe when she compares the total masses of the substances before and after the reaction? (1 point) A.The

  52. statistics

    Suppose we have a set of body temperatures with a mean of 98.6 degrees, and a sample standard deviation of 1.0 degree. Assuming a normal distribution of body temperatures in the larger population, between what two values should 95% of all temperatures lie?

  53. Foundation of a Healthy Lifestyle

    Neuron development and elaboration, which occurs between birth and age 10, is prompted by A. intake of foods rich in vitamins and minerals. B. physical movement on the part of the child. C. aural prompts from the family, school, and environment. D.

  54. Chemistry

    Hey! I'm having difficulty trying to identify what "types" of substances Ascorbic Acid and Palmitic Acid are. My teacher says that "only metallic and covalent network solids (these two are solid at room temp) are electrically conductive". Furthermore, she

  55. Physics 2 College Level

    A cylinder is closed at both ends and has insulating walls. It is divided into two compartments by an insulating piston that is perpendicular to the axis of the cylinder as shown in Figure a. Each compartment contains 1.00 mol of oxygen that behaves as an

  56. Physics

    Two copper blocks, each of mass 2.12 kg, initially have different temperatures,t1 = 18° C and t2 = 26° C. The blocks are placed in contact with each other and come to thermal equilibrium. No heat is lost to the surroundings (a) Find the final temperature

  57. child day care management,health,safety,and nutrit

    Q; neuron development and elaboration,which occurs between birth and age 10,is prompted by A.aural prompts from the family,school,and environment. B.physical movement on the part of the child C. intake of foods rich in vitamins and minerals D. exposures to

  58. children growing up

    language development is initially triggered a.socially b.pschologically c.biologically d.by parental contact my answer is d

  59. Child Care Management

    I have a questions that I have answered If some one could just check it Thanks. Neuron development and elaboration, which occurs between birth and age 10, is prompted by A.aural prompts from the family,school, and enviroment. B.physical movement on the

  60. childcare

    Repeating Ms.Sue. Thanks for your keen observation. Beuron development and elaboration, which occurs between birth and age 10, is prompted by: A. aural promts from the family, school and environment B. Physical moement on the part of the child C. Intake of

  61. tourism and hospitality

    A travel agent is a/an _________________. e-tail contact intermediary contact consolidator direct contact C?

  62. winterWx

    A soccer player kicks a soccer ball of mass 0.45 kg that is initially at rest. The force of the kick is given by F(t) = [(5×106)t - (2.5×109)t2] N for 0 ≤ t ≤ 2.0×10-3 s, where t is in seconds. (The player's foot is in contact with the ball for

  63. science/chemistry

    I have to write a persuasive paragraph on the following question: What should be the job of a scientist?Pick one to argue: a) Create more synthetic substances. Fore example: synthetic elements, genetically modified food b) Study substances that naturally

  64. Science ~CHECK MY WORK PLEASE~

    Both carbon dioxide and water are pure substances. How are they similar to each other? A.) both substances have a set ratio of atoms that cannot be separated by physical means. B.) both substances have a set ratio of atoms that can be separated by physical

  65. Chemistry

    Imagine that you have a pure sample of an unknown compound that you are told is either 2-naphthol OR benzoic acid. In the lab, you also have access to samples of pure 2- naphthol and pure benzoic acid. However, both of these pure substances melt at 123

  66. college

    Select the properly punctuated sentence. a. Please let me know; when I may contact you. b. Please let me know, when I may contact you. c. Please let me know when I may contact you.

  67. science

    both carbon dioxide and water are pure substances. how are they similar to each other? A. Both substances have a set ratio of atoms that cannot be separated by physical means. B. Both substances have a set ratio of atoms that can be separated by physical

  68. Science

    I have an experiment that I need to complete it is about how different substances react to another substance. Any ideas for I should do for my experiments? (The substances must be non toxic, ha ha!) Thank you very much!

  69. Chemistry

    A ___________ means that 2 or more substances have combined, yet the 2 substances retain their chemical identity?

  70. Chemistry

    A ___________ means that 2 or more substances have combined, yet the 2 substances retain their chemical identity?

  71. nutrition

    I am made from two substances that separately will kill. These same two substances combined will help preserve. What am I?

  72. algebra

    Based on average range of temperatures would 99 degrees in la be a likely temperatures on December explain why or why mot

  73. Chemistry

    Will someone show me the formula or help me through working this question? Thanks! A 2.85g lead weight, initially at 10.3 deg C, is submerged in 7.55g of water at 52.3 deg C in an insulated container. what is the final temperature of both substances at

  74. Science

    1) Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can be separated by

  75. SCIENCE

    Which of the following is false? Contact mode lithography gives better resolution than other two modes In contact mode lithography the mask may get contaminated by photoresist. Effect of diffraction of light is minimum for contact mode lithography. Contact

  76. Chem(again)

    Can someone tell me the equation for converting Celcius temperatures to Kelvin temperatures? Thanks K = 273.15 + C

  77. physics

    at what inclination should the object be released from rest if it is to reach a maximum horizontal distance of 2m as shown. coeff of friction is 0.37 for all surfaces of contact.

  78. Physics - Kinematics

    Qn: Ball 1 is launched up an inclined plane from the bottom of the plane with an initial speed that is the minimum speed for it just to reach the top of the plane. At the same moment as ball 1 is launched up the plane, Ball 2 is released from rest at the

  79. chem

    convert each of the following celsius temperatures to kelvin temperatures a. 0 b. 27 c. -50 d. -273

  80. Chemistry HELP

    Not all enzymes have an optimum temp of around 40 degrees celcius. Find out where reactions involving enzymes: would take place at very high temperatures would take place at very low temperatures i've tried looking on the internet, but I get a lot of

  81. Physics

    If given the ratio of temperatures in Celsius to Kelvin for Gold to silver as 1.10614 to 1.08265. How can I find the temperatures of each individual element form just this information?

  82. Physics

    Find the magnitude of the displacement of a point on a wheel initially in contact with the ground when the wheel (of radius 36.2 cm) rolls forward half a revolution.

  83. Science

    balance equation for lead(II) nitrate and sulfuric acid a) coefficients should be in terms of lowest whole numbers. represent substances in solutions as ions if the substances are extensively ionized

  84. physics

    a bus engine can operate at very high temperatures . if one of the cylinders has a volume of 1 litre and is initially at 25°C and atmospheric pressure , what is the temperature when the gas in the cylinder is reduced to a volume of 100cubic centrimeters

  85. chemistry

    most salts are more soluble in water at higher temperatures than at lower temperatures but not all. What are two exceptions? Explain how these salts can be less soluble at higher temperatures.

  86. children growing up

    language development is initially triggered a.socially b.psychologically c.biologically d.by parent contact I know that letter d is the wrong answer .so im thinking the right answer is b I know I have posted these questions before but really need some help

  87. AP Physics

    Two locomotives approach each other on parallel tracks. Each has a speed of v = 85 km/h with respect to the ground. If they are initially d = 7.0 km apart, how long will it be before they reach each other?

  88. Physics Classical Mechanics

    A person of mass m2= 85.0 kg is standing on a rung, one third of the way up a ladder of length d= 4.0 m. The mass of the ladder is m1= 15.0 kg, uniformly distributed. The ladder is initially inclined at an angle θ= 40.0∘ with respect to the horizontal.

  89. physics

    TWO LOCOMOTIVES APPROACH EACH OTHER ON PARALLEL TRACKS. EACH HAS A SPEED OF 95KM/H WITH RESPECT TO THE GROUNG. IF THEY ARE INITIALLY 8.5KM APART, HOW LONG WILL IT BE BEFORE THEY REACH EACH OTHER?

  90. science

    a___ is the change of one or more substances into other substances

  91. science, absolute zero

    what is absolute zero? if 0 kelvin is the lowest temperature we can ever get, then does it mean that -273 degree Celsius is the lowest temperature we can reach? the book said "when we remove all of the energy from something, its temperature will be zero

  92. algebra

    Silver is liquid for Celsius temperatures C such that 960.8 degrees (less than or equal to) C < 2180 degrees. Find such an inequality for for the corresponding Fahrenheit temperatures.

  93. Biology

    It is said that high temperatures inactivate catechol oxidase. How is it then that some Archaebacteria live in the hot springs of Yellowstone Park at temperatures as high as 73%.

  94. Math

    morning at 10:00 am was 17.6°c. Temperatures fell by 16.7°c between 10:00 pm -11:00 pm. What was temperatures at 11:00?

  95. statistics

    Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2°F and a standard deviation of 0.62°F. Find the 90th percentile of the sample mean body temperatures for samples of size 16.

  96. Math

    The students in Mrs. Lees class recorded the temperature at noon every day for a ten day period.The temperatures were 63,64,66,72,76,76,77,82,83,91.What is the range of the temperatures on the 5 coolest days A.7 B.9 C.13 D.20 C

  97. Physical Science

    Do liquids have momentum? Does the shape of an object affect the rate at which it will fall? Do thicker substances protect objects better than thin substances? Do liquids have momentum? yes Does the shape of an object affect the rate at which it will fall?

  98. math

    Q. Naomi has a formula that allows her to convert Clesius temperatures to Farenheit temperatures. She needs a formula for converting Fahrenheit temperatures to Celsius tempertures. What advice can you give her? I am thinking that I just reverse the

  99. math

    The greatest recorded temperature ranges in the world are around the “cold pole” in Siberia. Temperatures in Verkhoyansk have varied from 294°F to 98°F. What is the difference between the high and low temperatures in Verkhoyansk?

  100. coputer

    Write a program that asks the user to enter the high temperature for each day of one week. Store the temperatures in an array. Once completed, output all temperatures that have been stored into the array.

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