Of the following, which of the following is the largest object?
a. the Milky Way galaxy
b. the Large Magellanic Cloud
c. the Local Group
d. the Andromeda galaxy
c
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What is the angular separation of two spectral lines of wavelengths 497 nm and 251 nm formed in the third order with a grating having 587 lines per millimeter?
A) 34.8° B) 24.8° C) 41.3° D) 29.4° E) 4.21°
An air mass forming over the Gulf of Mexico would be classified as ______________
Fill in the blank(s) with correct word
A car's motor gives out just at the bottom of a big hill, but the car starts coasting up the hill. In what direction is the acceleration of the car just as it stops momentarily before rolling back down the hill?
What will be an ideal response?
A photon is emitted from a hydrogen atom that undergoes a transition from n = 3 to n = 2 . Calculate the energy and wavelength of the photon. (The ionization energy of hydrogen is 13.6 eV, and h = 6.63 × 10^-34 J×s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^-19 J, and 1 nm = 10-9 m)
a. 2.21 eV, 563 nm c. 2.58 × 10^–19 J, 658 nm b. 1.89 eV, 460 nm d. 3.02 × 10^–19 J, 658 nm