The ________ explains why the spectral lines from a rapidly rotating star are broader than those from a slowly rotating star
Fill in the blank(s) with correct word
Doppler effect
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A steel rod 55 cm long has a diameter of 30 cm. The compressive strength (the maximum stress it can support without breaking) of this steel is 500 × 106 N/m2. What is the compression force that would break the rod?
A) 3.5 × 107 N B) 2.4 × 107 N C) 1.4 × 108 N D) 4.7 × 108 N E) 8.9 × 108 N
What is the phase angle in a series RLC circuit at resonance?
1.180° 2.90° 3.0 4.-90° 5.None of these answers is necessarily correct.
When an electron drops to a lower energy level in an atom, but no other interactions take place
A) the atom may emit a photon of light of a specific wavelength. B) the total energy of the atom remains unchanged. C) the atom must slow its speed moving through space. D) the atom must increase its speed moving through space. E) the electron must become slightly more massive.
The peak wavelength in the continuum emission spectrum of a body is inversely proportional to its ____________________
Fill in the blank(s) with correct word