What force will a negative charge placed at location C feel?
a. zero
b. a force up and to the left
c. a force up and to the right
d. a force down and to the left
e. a force down and to the right
E
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You want to confine an electron in a box (an infinite well) so that its ground state energy is 5.0 × 10-18 J. What should be the length of the box? (h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)
A) 0.11 nm B) 0.22 nm C) 0.15 nm D) 0.18 nm
The focal length of the objective of a telescope is 75.0 cm. While the eyepiece has a focal length of 6.00 cm, what is the magnifying power of this telescope?
A) 0.0800 B) 0.645 C) 450 D) 12.5 E) 200
Through what potential difference must an electron (starting from rest) be accelerated if it is to reach a speed of 3.0 × 107 m/s?
A. 5.8 kV B. 2.6 kV C. 7.1 kV D. 8.6 kV E. 5.1 kV
An acoustical engineer designing a music hall is most concerned with
A) modulation. B) forced vibrations. C) resonance. D) beats. E) reverberations.