It takes ________ astronauts to operate the Hubble Space Telescope
Fill in the blank(s) with correct word
zero
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Ellis and Randy are looking at a molecular absorption spectrum. The spectral lines appear to fall into two groups with a gap in the middle. Ellis says that this must be an absorption spectrum for transitions between the v = 0 and v = 1 vibrational states of a diatomic molecule. Randy says the gap in the middle must occur because a ?J = 0 transition is forbidden. Which one, if either, is correct,
and why? a. Ellis, because rotational levels are separated by greater energy differences than vibrational levels. b. Randy, because rotational levels are separated by greater energy differences than vibrational levels. c. Ellis, because the ?J = 0 transition is the most prominent spectral line in transitions between vibrational levels. d. Neither, because rotational levels are separated by greater energies that vibrational levels and ?J = 0 transitions are not forbidden. e. Both, because vibrational levels are separated by greater energy differences than rotational levels and ?J = 0 transitions are forbidden.
A Ferris wheel starts at rest and builds up to a final angular speed of 0.70 rad/s while rotating through an angular displacement of 2.5 rad. What is its average angular acceleration?
a. 0.098 rad/s2 c. 1.8 rad/s2 b. 0.05 rad/s2 d. 0.60 rad/s2
In the Bohr model of the hydrogen atom both the energy and orbital angular momentum of the electron are quantized
Indicate whether the statement is true or false
What do the radio pulses within the anticoded message sent in 1974 represent?
a. all the letters in the alphabet b. dots and dashes, like Morse code c. binary numbers, ones and zeroes d. Music, notes and measures e. the numbers one through ten