An arrangement of 3 charges is drawn showing the field lines. The first charge has 20 lines going into it. The second charge has 30 lines going out of it. If the net charge of the arrangement is zero, what is the field line situation for the third charge?
A. 50 lines going out
B. 50 lines going in
C. 10 lines going out
D. 10 lines going in
E. 600 lines going out to infinity
D. 10 lines going in
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A particle is in the first excited state of a one-dimensional box of length 1.0 m. What is the minimum value of its momentum (in kg × m/s)?
a. 3.3 × 10^-34 b. 6.6 × 10^-34 c. 9.9 × 10^-34 d. 13 × 10^-34 e. 22 × 10^-34
Which of the following statements about X-rays and radio waves is not true?
A) X-rays have shorter wavelengths than radio waves. B) X-rays and radio waves are both forms of light, or electromagnetic radiation. C) X-rays have higher frequency than radio waves. D) X-rays have higher energy than radio waves. E) X-rays travel through space faster than radio waves.
Musical tones are characterized by
A) quality. B) partial tones C) harmonics. D) all of the above E) none of the above
A camera lens having a 50-mm focal length is set to f/4.0. What is the minimum spacing of two objects located 12 m from the lens if the objects are just barely resolved in the image using light of wavelength 500 nm?
A) 4.9 × 10-5 m B) 0.024 mm C) 0.59 mm D) 4.72 mm E) 1.66 mm