The process of making an electron less tightly bound to an atom's nucleus is known as
a. excitation.
b. Doppler broadening.
c. collisional broadening.
d. a red shift.
e. quantum mechanics.
a
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A single force is acting on an object. Which type of motion is not physically allowed?
A. the object speeds up B. the object is at rest C. the object slows down D. the object's motion changes direction
The position of a mass that is oscillating on a spring is given by x = (12.3 cm) cos[(1.26 s-1)t]. What is the speed of the mass when t = 0.805 s?
A) - 13.2 cm/s B) 13.2 cm/s C) 8.19 cm/s D) - 8.19 cm/s E) 0 cm/s
A ruby laser can deliver a 4.33-J pulse in approximately 50 nanoseconds. The wavelength of the light is 694 nm. At least how many atoms within the ruby rod had to be excited to allow this high-energy laser pulse? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.6 × 10^?19 J, and 1 nm = 10?9 m)
a. 3.5E+18 b. 3.0E+17 c. 1.5E+19 d. 1.5E+21 e. 1.1E+18
Reactance: At what frequency will the inductive reactance of a 44-mH inductor be equal to the capacitive reactance of a 27-pF capacitor?
Fill in the blank(s) with the appropriate word(s).