A wiggle in both space and time is a
A) vibration.
B) wave.
C) both of these
D) neither of these
Answer: B
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Suppose the two plates of a parallel-plate capacitor have fixed charges Q and -Q. If we double the gap between the plates, the (a) potential difference between the plates,
A. quadruples. B. doubles. C. remains the same. D. is reduced by a factor of two. E. is reduced by a factor of four. F. some other result (specify).
An M star is hotter than an O star
Indicate whether the statement is true or false
Acceleration, a, velocity, v, and displacement, s, can be related to each other without the use of time as:
A. v dv = a ds. B. v = a d2/ds2. C. a dv = v ds. D. a = v d2v/ds2.
In a two-slit experiment, the third bright fringe away from the central fringe is observed at an angle of 7.0°. If the wavelength of the light is 490 nm, what is the distance between the two slits?
A) 3.6 × 10-5 m B) 4.0 × 10-6 m C) 2.1 × 10-6 m D) 2.1 × 10-5 m E) 1.2 × 10-5 m