• Small changes in the movement of Neptune led several astronomers to believe that an undiscovered planet was affecting Neptune's orbit.

    VOA: special.2010.07.11

  • You see, the quantum condition, by putting quantization into the moangular mentum it is propagated through the entire system. Orbit dimensions are quantized.


    麻省理工公开课 - 固态化学导论课程节选

  • The radius of the orbit, the energy of the system and the velocity of the electron, I am just going to present you the solutions.


    麻省理工公开课 - 固态化学导论课程节选

  • Glenn's flight plan called for him to spend most of the first orbit getting used to the feeling of being weightless.

    VOA: special.2009.06.17

  • So, what he did was kind of impose a quantum mechanical model, not a full one, just the idea that those energy levels were quantized on to the classical picture of an atom that has a discreet orbit.


    麻省理工公开课 - 化学原理课程节选

  • The radio waves are measured when the earth is at two points opposite one another in its orbit.

    VOA: special.2009.01.20

  • The subject of white folks is associationally swept into the orbit of talk.


    耶鲁公开课 - 1945年后的美国小说课程节选

  • Military officials immediately offered to use the Jupiter to put a scientific satellite into orbit around the Earth.

    VOA: special.2009.06.10

  • Let's imagine it's a circular orbit.


    耶鲁公开课 - 基础物理课程节选

  • Near the moon, the astronauts fired rockets to slow the spacecraft enough to put it into moon orbit.

    VOA: special.2009.07.15

  • If de Broglie is correct, we could then model the electron in its orbit not moving as a particle, but let's model it as a wave.


    麻省理工公开课 - 固态化学导论课程节选

  • Knowing more about how the Yarkovsky effect changes an asteroid's orbit will help scientists better predict whether RQ36 will come near Earth.

    VOA: special.2011.06.22

  • Let's imagine this is the electron in its orbit.


    麻省理工公开课 - 固态化学导论课程节选

  • Next year, the Chinese plan to launch a small space laboratory to practice docking of spacecraft in orbit.

    VOA: special.2010.04.28

  • Well, this is in a stationary orbit so we need to have a standing wave. Not to scale.


    麻省理工公开课 - 固态化学导论课程节选

  • Gemini Six followed Gemini Seven, but in a lower orbit that moved the two spacecraft closer together.

    VOA: special.2009.07.01

  • In order to have an electron in a stationary orbit this implies standing wave.


    麻省理工公开课 - 固态化学导论课程节选

  • The twenty-two meter long rocket would put a little scientific satellite into orbit as one of the events of the international geophysical year.

    VOA: special.2009.06.10

  • Well, suppose I want to look at something like an electron in orbit here.


    麻省理工公开课 - 固态化学导论课程节选

  • Iran launched its first satellite into orbit in February -- the thirtieth anniversary of the Islamic revolution.

    VOA: special.2009.05.23

  • And so, therefore, all other things being equal, the first orbit should be at a smaller distance.


    麻省理工公开课 - 固态化学导论课程节选

  • He says there are more than three hundred thousand small objects or pieces of debris in orbit that are larger than one centimeter.

    VOA: special.2009.04.01

  • That is the electron in its lowest orbit, to the nucleus of atomic hydrogen.


    麻省理工公开课 - 固态化学导论课程节选

  • He would wait in orbit around the moon while Armstrong and Aldrin landed and explored the surface.

    VOA: special.2009.07.15

  • You've got negative charge in motion, and it's in a circular orbit.


    麻省理工公开课 - 固态化学导论课程节选

  • Because of the gravity on Mars, spacesuits may have to be designed to be lighter than suits used in orbit or on the moon.

    VOA: special.2011.04.06

  • It doesn't simply orbit the nucleus, but as it orbits it spins.


    麻省理工公开课 - 固态化学导论课程节选

  • The next Royal Astronomer, Edmund Halley, spent another forty years gathering information about the moon's orbit.

    VOA: special.2010.07.14

  • Let's look first of all at the radius of the orbit.


    麻省理工公开课 - 固态化学导论课程节选

  • It is the value of the radius of the ground state electron orbit in atomic hydrogen.


    麻省理工公开课 - 固态化学导论课程节选

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