If the plate area, plate separation, and dielectric constant all are doubled for a parallel plate capacitor, what happens to the capacitance?
A. it stays the same
B. it doubles
C. it quadruples
D. it halves
E. it quarters
B. it doubles
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Spectral lines from Galaxy B are redshifted from their rest wavelengths twice as much as the spectral lines from Galaxy A. According to Hubble's law, what can you say about their approximate relative distances?
A) Galaxy A is twice as far as Galaxy B. B) Galaxy B is four times as far as Galaxy A. C) Galaxy A is four times as far as Galaxy B. D) Galaxy B is twice as far as Galaxy A. E) Not enough information to say—you need to know Hubble's constant to answer this question.
If we say that a material is opaque to ultraviolet light, we mean that it ________
A) emits ultraviolet light B) absorbs ultraviolet light C) reflects ultraviolet light D) transmits ultraviolet light
A solid cylinder of radius R = 1.0 m and mass 10 kg rotates about its axis. When its angular velocity is 10 rad/s, its angular momentum (in kg?m2/s) is
A. 50. B. 20. C. 40. D. 25. E. 70.
Light of wavelength 418 nm is incident on a slit of width 0.35 mm, and a diffraction pattern is produced on a screen that is 2.4 m from the slit. What is the distance of the second dark fringe from the center of the bright fringe? (1 nm = 10?9 m)
a. 2.9E–7 m b. 5.7E–3 m c. 1.6E–3 m d. 1.4E–6 m e. 1.1E–6 m