When all the colors of the rainbow can be seen in
a spectrum and no individual bright or dark lines
are visible, the spectrum is called
a)an emission spectrum.
b)a continuous spectrum.
c)a chromatic spectrum.
d)an absorption spectrum.
b
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The night sky is dark because the universe is not infinitely old
Indicate whether the statement is true or false
The densest stars in the H-R diagram are the white dwarfs
Indicate whether the statement is true or false
What is the self-inductance in a coil that experiences a 2.30-V induced emf when the current is changing at a rate of 160 A/s?
a. 6.96E–1 H b. 3.31E–2 H c. 160 H d. 1.44E–2 H e. 3.68E+1 H
A measurement of an electron's speed is 2.0 × 106 m/s and has an uncertainty of 10%. What is the minimum uncertainty in its position? (h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)
A) 0.91 nm B) 1.8 nm C) 2.7 nm D) 2.8 nm E) 5.0 nm