As you walk away from a vertical plane mirror, your image in the mirror
A) is always the same height.
B) may or may not decrease in height, depending on where the observer is positioned.
C) is always a real image, no matter how far you are from the mirror.
D) changes from being a virtual image to a real image as you pass the focal point.
E) decreases in height.
A
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A mass spectrometer separates
A) ions of different elements. B) different-mass ions of the same element. C) different-mass ions of the same speed. D) all of the above E) none of the above
The standard exam page is 8.50 inches by 11.0 inches. Its area in cm2 is
A. 19.5. B. 36.8. C. 93.5. D. 237. E. 603.
The center of the Milky Way galaxy must be less than 1 AU in diameter and contain at least 4 million solar masses. Therefore, the center of the Milky Way galaxy must be a ____________________,
Fill in the blank(s) with correct word
If an electron has a wavelength of 0.123 nm, what is its kinetic energy, in electron-volts? This energy is not in the relativistic region
(melectron = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s) A) 19.8 eV B) 60.2 eV C) 80.4 eV D) 99.5 eV E) 124 eV