________ optics deform the shape of the mirror to compensate for the turbulence in the atmosphere and yield a close to diffraction-limited image
A) Collimating B) Parabolic C) Adaptive D) Coherent E) CCD
C
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If 0.025 eV neutrons were fired through a double slit so that the first order interference occurred at 10°, what is the slit spacing?
A) 2.5 × 10-8 m B) 1.0 × 10-9 m C) 3.1 × 10-11 m D) 1.8 × 10-10 m E) No answer is correct since neutrons cannot act like waves.
The only metal that does not react with oxygen under ambient conditions is _________.
Fill in the blank(s) with the appropriate word(s).
Standing Sound Waves: A string that is 0.26 m long is vibrating in its n = 6 harmonic. The sound from this string excites a pipe that is 0.88 m long and open at both ends into its second overtone resonance. What is the common resonant frequency of the string and the pipe? The speed of sound in air is 345 m/s.
A. 590 Hz B. 390 Hz C. 490 Hz D. 690 Hz E. 760 Hz
A “free” electron and a “free” proton are placed in an identical electric field. Is the following statement true or false?
The electric force on the proton is greater in magnitude than the electric force on the electron, but in the opposite direction.
1.False 2.True