Various singly-ionized atomic nuclei of the same speed are directed into a magnetic field in a mass spectrometer where they are deflected and strike a detecting screen. The particles most strongly deflected are those of
A) least mass.
B) greatest mass.
C) same for all
Answer: A
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Scientists suspect that Mars once had abundant liquid water on its surface. For this to have been true, early Mars must have had ________ than Mars today.
A) a much higher atmospheric pressure and much stronger greenhouse effect B) a larger mass and radius C) a smaller axis tilt and less elliptical orbit D) larger polar caps and more dust storms
If a ball rolls down an inclined plane and gains 4 m/s each second it rolls, its acceleration is
A) one half of 4 m/s. B) one half of 4 m/s2. C) 4 m/s2. D) 10 m/s2.
200 J of work is done in compressing a gas adiabatically. What is the change in internal energy of the gas?
A) zero B) 100 J C) 150 J D) 200 J E) There is not enough information to determine.
When diffraction of light occurs with a single slit,
A. a number of interference fringes are produced around the central bright spot. B. only one interference fringe can be seen. C. the interference fringes have the same brightness as the central bright spot. D. a central bright spot with one dimmer spot on each side can be seen.