Particles have enough energy to break free from each other and can move around freely. What kind of substance is described? A:solid B:liquid C:gas D:Molecule

30,461 results
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    Why are there only two elements in the first period of the periodic table?(1 point) because the next elements have other things in common and they need to be arranged together because the next elements have other things in common and they need to be

  2. Kinetic and Thermal energy quick check answers

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  8. science(pls help :D)

    Particles have enough energy to break free from each other and can move around freely. What kind of substance is described? A:solid B:liquid C:gas D:Molecule

  9. 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

  10. Science

    A blacksmith strikes a piece of metal with a hammer repeatedly. The metal slowly begins to glow as the temperature increases, and the metal becomes more malleable. Which changes on a microscopic level led to the visible changes in the properties of the

  11. Science

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  12. Chemistry

    CH4 + 2 O2 --> CO2 + 2 H2O + heat This reaction is exothermic because more energy is released when the products bond than is required to break the bonds of the reactants. The potential energy of the products (not including the heat) is lower than the

  13. Science

    1. Which phrase best describes wavelength? A. The number of times a wave repeats B. The time it takes for a wave to repeat C. The distance between wave crests D. The distance a wave is from the starting point 2. What do all the waves have in common? A.

  14. Science "HELP"!

    Passage:The particles of matter are in constant motion. The energy of motion is called kinetic energy, so the particles of matter have kinetic energy. As matter becomes warmer, its particles move faster. As a result, their kinetic energy increases.

  15. Chemistry

    Which of these most accurately describes the motion of gas particles? 1.) particles making up gases are mostly fixed in their locations and have vibrational motion. 2.) particles making up gases have few intermolecular interactions and are free to move.

  16. chemistry

    What must be true for a substance to dissolve in water? A. The entropy term must be positive. B. The enthalpy and entropy terms must combine for a favored reaction. C. The free energy change of dissolving must be positive. D. The energy required to break

  17. Physics

    A lead bullet of mass 50 grams is fired with a velocity of 200m/s into a lead block of mass 950 grams. Given that the lead block can move freely, calculate the kinetic energy after impact and the loss of energy.

  18. Science 6 A

    A scientist finds a new organism. It gets energy by absorbing nutrients from its surroundings. It is unicellular and it uses a tail-like structure to move around. Is this new organism a protist or a fungus? Eating particles through endocytosis. Absorbing

  19. Science

    In a vacuum the coloured particles would move very quickly... why did they move so much more slow in your solutiin.

  20. science

    Which of the following best describes plasma? A) a group of super cooled particles with very low kinetic energy B) an ionized group of particles with low kinetic energy C) a gas that becomes a solid without first becoming a liquid D)an electrically charged

  21. Science

    2. why is gas able to flow? a) Its particles have melted and can move around b) Its particles have high viscosity and can move around c) Its particles have enough energy to move around d) Its particles have enough pressure to move around 3. Which of the

  22. Chemistry

    Can someones please check my work? 1. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely? A: It takes the shape of its contaienr because its particles can slip past each other. but it has

  23. college chemistry

    CH4 + 2 Cl2--> CH2Cl2 + 2HCl Cl-Cl bond energy: 242 kj/mole 1. Calculate the amount of energy (Joules) needed to break a single Cl-Cl bond. 2. Calculate the longest wavelength of light (meters)that can supply the energy per photon necessary to break the

  24. science

    What takes place when heat energy is added to a liquid? A) The particles will increase in speed/temperature, and will eventually reach a point where they can change phases to a gas. B) The particles will increase in speed/temperature and eventually will

  25. one more question

    how would you describe change in a arrangement of particles as heat energy and temperature increases. here is my answer: temperature increase makes particles move faster and spread a part Please edit

  26. physics

    One particle has a mass of 3.00*10-3 kg and a charge of +7.60 µC. A second particle has a mass of 6.00*10-3 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between

  27. chem

    What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the isomerization? Energy required to break pi bond is 4.42*10^-19. wavelenght=c/f but how do i figure out what f is?

  28. Physical Science Just One Question PLEASE HELP!

    In an exothermic reaction, the amount of energy required to break the attractions among the solute particles and among the solvent particles is A) greater than the energy released as attractions form between solute and solvent particles. B) less than the

  29. science

    Which statements best describe how the properties of gases and plasmas differ? (Select all that apply). The particles of plasmas have a higher kinetic energy than the particles of gases. Gas particles are charged while plasma particles are uncharged.

  30. Science

    Which of these choices best describes the thermal energy of a substance? a the sum of the kinetic energy of all of the particles of a substance b the average kinetic energy of the particles that make up a substance c the total kinetic and potential

  31. Science test

    Pls help In which case would connect energy of particles be increasing? A metal is heated at 1300°C B metal is heated from room temperature at 200°***** C metal is cooled at 1300°C D metal is at room temperature 37°C Water boils at 100°C and turns

  32. PLS HELP ASAP 1 SUPER HARD & ANNOYING QUESTION

    Use the diagram to answer question 13. so substance A looks like a row of three little circles on the top and bottom all organized (total six dots). substance b is all clumped together circles and is disorganized. 13. How can substance A and B be compared?

  33. Science

    Why do some chemical reactions occur? Select all that apply. so the particles can have less energy so the particles can turn into gas so the particles can have less volume so the particles can be more spread out

  34. Chem

    Which of the following statements is part of the kinetic theory? The particles of a gas move independently of each other. The particles in a gas move rapidly. The particles in a gas are relatively far apart. all of the above

  35. Science

    13.)How can substance A and B be compared? Choose all that apply. A.)The particles of substance A have more energy than the particles of substance B.*** B.)The particles of substance A are more tightly held together than the particles of substance B.

  36. Matter and Temperature

    A blacksmith strikes a piece of metal with a hammer repeatedly. The metal slowly begins to glow as the temperature increases, and the metal becomes more malleable. Which changes on a microscopic level led to the visible changes in the properties of the

  37. Science

    Examine the scenario. A stream of positively-charged particles is moving to the left in a magnetic field. The particles experience an upward force. Which choice most accurately describes the effect on the magnetic field on a stream of negatively-charged

  38. physics

    How much kinetic energy is gained by an electron that is allowed to move freely through a potential difference of 2.5 × 10^4 V? -- U=qV =(1.6*10^-19)(2.5*10^4) =4*10^-15 I'm not sure what other formulas i can use, or how to relate potential energy to

  39. science

    a substance that keeps its shape because its particles can't flow freely is a(n).........

  40. NARAYANA JUNIOR COLLEGE .PHYSICS

    2 PARTICLES [FREE TO MOVE] WITH CHARGES +q and +4q are a distance L APART. A 3RD CHARGE IS PLACED SO THAT THE ENTIRE SYSTEM IS IN EQ2UILIBRIUM.FIND THE LOCATION,MAGNITUDE AND SIGN OF THE 3RD CHARGE

  41. CHEMISTRY!!

    Which of the following is NOT a postulate of the kinetic molecular theory? A; the average kinetic energy of the particles is directly proportional to the absolute temp. B;the forces of attraction and repulsion between the particles are insignificant C:the

  42. Science

    Why is a gas able to flow? It's particles have melted and can move around. It's particles have high viscosity and can move around. It's particles have enough energy to move around. It's particles have enough pressure to move around.** not sure of the

  43. Science

    For a reaction to occur, the energy of the system must meet the activation energy threshold. Which best explains why increasing the temperature increases the rate of a reaction? A) Because more particles spread out away from each other B) Because more

  44. Science

    Which of the foolowing occurs when a mass of air rises into the atmosphere? A) it becomes warmer because the particles move closer together B) it becomes cooler because the particles move closer together C) it becomes cooler because the particles move

  45. physics

    Consider a system of N identical particles. Each particle has two energy levels: a ground state with energy 0, and an upper level with energy . The upper level is four-fold degenerate (i.e., there are four excited states with the same energy ). (a) Write

  46. Science (URGENT)

    Can someones please check my work? 1. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely? A: It takes the shape of its contaienr because its particles can slip past each other. but it has

  47. Chemistry

    what particles are free to drift in metals? cations, electrons, neutrons, or protons? and what is the SI unit of mass? is it kilogram kg is correct for the SI unit of mass. Electrons conduct electricity; therefore, the electrons must be free to move in

  48. physics

    two charged particles of masses 4m & m and having charges +q & +3q are placed in uniform electric field they are allowed to move for 2 sec find the ratio of their kinetic energy solution

  49. chemistry

    Compared to the particles of a gas, the particles of a liquid are not in constant motion collide with the sides of the container, but not with each other do not completely fill their container can move longer distances have more space in between the

  50. Chemistry

    Why during melting, particles gain energy and vibrate more, until they are able to overcome the forces that hold them in their fixed position? Why during boiling, particles gain kinetic energy and move quickly until they can completely break the forced

  51. Physics

    Dust particles are trapped on a surface. There are two energy levels particles can be in: absorbed on a surface with zero energy, and wiggling with energy E=3/2kT. However, since the surface area is limited, not all particles can be in any state. There are

  52. Chemistry

    Which of the following are behaviors of a gas that can be explained by the kinetic-molecular theory? a. Gases are compressible. b. Gases exert pressure. c. All particles of a gas sample move at the same speed. d. Gas particles can exchange kinetic energy

  53. science

    1.in what state of matter are the particles closets together? 2.in what states of matter ha an indefinite shape but not definite volume 3.what state of matter do particles move most freely ? 4.give an ex of chemical change of paper 5.what is the different

  54. APCHemistry

    Hi these are the posts from earlier---i just had a quetsion about your response: ""Apchemistry - DrBob222, Monday, April 26, 2010 at 7:10pm Your thinking is ok. All ionic solids, although composed of ions, are locked into place by the crystal lattice

  55. Chemistry

    As a substance goes from a solid to a liquid, the particles move further apart? duh For many substances, yes. It depends on the density of the solid/liquid. What does happen, is that in solids atoms are mostly bound in a crystal arrangement, and not free

  56. Chemistry

    how many radicals are in CuSO4? What occurs to CuSO4 particles in terms of temperature,energy and particles Arrangment as they move from matter to solid? What is the proccess called? (moving from liquid to solid)

  57. Science

    Please Check my Work:pls check my work asap! 1. A ___ has a definite shape and a definite volume. (1 point) 1. solid (My Choice) 2. liquid 3. gas 4. molecule 2. Why is a gas able to flow? (1 point) 1. Its particles have melted and can move around. 2. Its

  58. Science

    Which of these correctly describes how a system can store potential energy on the microscopic level?” A. The particles must have position with regards to a reference point if the system stores potential energy B. The particles must be in motion if the

  59. Chemistry

    Factors affecting reaction rate. Use collision theory to explain. Factor: nature of the reactant Affect on rate: more or less reactive based on its chemical identity. reactivity: aq>g>l>s Explanation: For the other factors, we had to explain it based on

  60. Chem

    Why does sodium chloride not conduct electricity as a solid but when melted, does conduct electricity? Thanks Solid NaCl consists of a three dimensional array of Na^+ and Cl^-. Even though the ions are present, the ions are not free to move about; i.e.,

  61. Physics

    An electron and a proton execute uniform circular motion in the presence of a uniform magnetic field. If the radius of the circle is the same for both particles, which of the following statements is true? a. Both particles move in the same direction; the

  62. Physics

    An electron and a proton execute uniform circular motion in the presence of a uniform magnetic field. If the radius of the circle is the same for both particles, which of the following statements is true? A)Both particles move in the same direction; the

  63. science

    The popsicle you are eating starts melting. Which of the following is correct regarding the situation? The popsicle loses thermal energy and the particles speed up. The popsicle gains thermal energy and the particles speed up. The popsicle loses thermal

  64. Science

    1) Instead of using the word "random",is it acceptable to say particles in a liquid move about in "different" directions? 2) Why does ice have a higher density than water vapour? Is it because ice has a greater mass in a fixed volume? 3) The statement

  65. Physical Science

    Explain how atoms move/pass in conduction. This is my answer. When heat comes in contact with matter it makes the atoms vibrate. As the conductor is heated , the atoms gain more energy and vibrate more. This causes them to collide with other atoms

  66. Chemistry

    How much energy, in kilojoules per mole, is released when an electron makes a transition from n=5 to n=2 in an hydrogen atom? Is this energy sufficient to break the H-H bond (436 kj/mol is needed to break this bond)

  67. Chemistry

    Is this right?: Energy is absorbed in order to break bonds because bond breaking requires energy. Or are these two statements completely separate?: "energy is absorbed when bonds break" and "breaking bonds require energy"

  68. Science

    Laith notices that the air in his science classroom is much warmer than the air in his math classroom. Which statement describes how the air particles are different in his colder math classroom? A. They move faster on average B. They are vibrating C. They

  69. Bose gases, quantum physics.

    A hypothetical gas consists of four indistinguishable particles. Each particle may sit in one of five allowed quantum states, with energies ε,3ε,5ε,7ε and 9ε. Assume that the total energy of the gas is fixed at 16ε. (a) If the particles are bosons:

  70. science

    How does molecules move throughout the water cycle? evaporation: They move freely in the air condensation:They lose energy and are cooled runoff; they move down to the water precipatation: they fall down to the earths surface im really not sure so if i

  71. Physics (please help!)

    1000 dust particles are trapped on a surface. There are two energy levels the particles can be in: absorbed on the surface in a zero energy state, or excited with energy E1. At a certain temperature T0, the particles are in thermal equilibrium, and 20 % of

  72. Chemistry

    Four particles have free access to distribute into four different energy levels 0,5,10, and 20J. If these four particles are to create two macrostates having total energies 10J and 40J, which macrostate has more entropy?

  73. 8th grade science

    I'm not sure what's the correct answer: 9)Which of these characteristics can only be attributed to a wave of red light? A)The energy of the wave travels in the same direction as the wave travels. B)The wave travels by vibrating the particles of the medium

  74. Chemistry(Please check)

    1) choose the correct statement about the postulates of kinetic theory of gases. a) a sample of a gas consists of a small number of large particles close together. b) the movement of gas molecules is predictable, not random. c) when gas molecules collide,

  75. Chemistry

    I have a couple of questions I need a hand with: 1. Oxygen has a melting point of -218 degrees celcius and a boiling point of -183 degrees celcius. This means that oxygen would be a liquid at...? Please do not tell me the answer, but tell me the relation

  76. Science! Biology 1

    Question: Which of following best describes the free-energy requirements of an organism? Answer Choices: During times of hibernation large amounts of free energy are required. Free-energy demand is consistent for all heterotrophs. The organism requires

  77. Chemistry

    What change would occur in the kinetic energy of vapor if a container of vapor is placed at 0 Kelvin? A.The kinetic energy of gas particles will increase. B.The kinetic energy of gas particles will decrease. C.The kinetic energy of gas particles will

  78. Chemisrty

    Why does ionization energy tend to increase as you move across a period? As you move across a period, you add a proton in the nucleus and an electron in the outer shell. Ther greater number of protons causes a stronger pull on the electrons. The electrons

  79. physics

    How much kinetic energy is gained by an electron that is allowed to move freely through a potential difference of 2.5 × 104 V?

  80. chemistry

    Is this statement accurate? the boiling point of the distilled water was 99°C. After five minutes, the temperature still stayed the same; it remained constant. The liquid was becoming a gas. Phase change means there is an energy change. When the

  81. Science

    I need help filling this blank. The difference between a "cool" solid and a "hot" solid is that the particles vibrate __________ in the cool solid. Would "freely" fit the blank? The difference between a solid and a liquid at the same temperature is that

  82. science

    What vibrating particles don't have enough energy to move out of position?

  83. Physical Science

    Here are a few questions that I have answered; can someone please check if they are correct? Thanks! 1.In which type of waves do the particles in a medium move parallel to the direction that the waves move? Ans- longitudinal waves 2.Which type of wave

  84. science

    Blank have vibrating particles that don't have enough energy to move out of position?

  85. Science

    1. What term refers to an energy transfer that causes a change in tempeture? Assume that you have just taken a pan of cooies out of the oven and set them on he counter to cool. 2. What term refers to the aveage kinetic energy of the particles of one of the

  86. Chemistry

    Can someone explain in easier terms the spontaneous process, entropy, and free energy. The textbook is hard to understand. Just a simple explanation. Thanks. Appreciate it! Free energy is the amount of energy that can be released in a chemical reaction. If

  87. Chemistry

    I have an assignment. It has two boxes to model the particles of the same gas at different temperature (18 and 45 degrees Celsius). I have to write two or three sentences relating the temperature, the average kinetic energy, and the motion of the particles

  88. Physics

    When water waves travel, the water particles ___? 1. move with the wave and energy is not propagated 2. vibrate in the direction of wave motion and only energy is propagated 3. move with the wave and energy is propagated 4. vibrate perpendicular to the

  89. physics

    Here on earth and also on the moon two identical heavy crates (300kg) sit at rest on 2 identical level platforms with coefficients of static friction equal to (0.90). If one end of both platforms is slowly raised at the same time in both locations, will

  90. Science

    What absorbs or reflects energy from the sun in the atmosphere? I say- Water vapor,carbon dioxide,the ozone layer,Clouds, dust, and other particles absorb energy. Clouds, dust particles and molecules of gases reflect energy. Is this right?

  91. Physics

    Led bullet of mass 50kg is fired with a velocity of 200m/s into a led block of mass 950g .given that the led block can move freely calculate (1)The kinetic energy after impact (2)the loss of energy.

  92. physic

    An infinite uniformly-charged sheet with a = -2 x 10^-10 C/m2 occupies the yz plane. A deuteron1 is created at a point on the +x axis 5 m from the sheet. The deuteron is produced with zero kinetic energy and is free to move. a) What is the location of the

  93. chemistry

    I have to find delta G from a problem. Not the standard free energy, from the change in engery. So this delta G does not have the degree sign above. The equation i used was deltaG=standard G+RTlnQ If deltaG was a positve number, what does that tell me. I

  94. Physics

    A photon of energy E strikes an electron at rest undergoes pair production, producing a positive electron(positron) and an electron, photon+electron produce positron+electron+electron The two electrons and the positron move off with identical momenta in

  95. physics-nuclear reactors

    a) Let's assume a nuclear reactor was a completely isolated system, such that no matter particles can escape from it and the only thing that can get out is energy in the form of heat and radiation. If we weigh the whole reactor before switching it on, and

  96. chem

    What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the isomerization? Energy required to break pi bond is 4.42*10^-19. wavelenght=c/f but how do i figure out what f is?

  97. Physics

    If you could reach absolute zero then? A) The system falls into quantum ground state B) The system will have an entropy of zero C) Molecules will not overlap, D) Particles will continue to move E) There is still zero-point energy Are all of these true?

  98. Materials Science

    A materials scientist is working on developing a dispersion-hardened aluminum alloy. What is the minimum surface energy required for the dispersion particles to induce dislocations to be pinned at the particles, and bow out around them, rather than to cut

  99. Satire-Writeacher

    Is this a good start? Yesterday I was the photographer for a small court house wedding. As I was waiting for the couple to finish the necessary paperwork for a legal marriage, I couldn’t help but overhear the daughter of the bride, a 9th grade student,

  100. biology

    in a vacuum the coloured particles of potassium manganate(vii)would move very quickly in water. why would it move slow at room temperature?

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