Accelerated electron beams are often used to study surfaces and other features of materials. Suppose one had an electron accelerator that was useful for producing electron beams used to study the features of atoms on the surfaces of solids, but wanted to alter the design to produce beams appropriate for the study of the nuclei of those atoms. What would be the appropriate alteration?
A. Increase the beam intensity
B. Decrease the beam energy
C. Decrease the beam intensity
D. Increase the beam energy
E. Increase the transverse beam size
F. Decrease the transverse beam size
D. Increase the beam energy
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If you toss a ball straight upward at 40 m/s, with no air resistance it returns to you at a speed of
A) zero. B) 10 m/s. C) 40 m/s. D) more than 40 m/s.
You lift a 1 kg object [weight on Earth = 10 N] by 1 m. By about how much does the object's mass increase?
A) 10-12 kg B) 0.01 kg C) 10-16 kg D) 10-14 kg E) Its mass doesn't change at all.
The frequency of induced voltage in a wire coil depends on
A) the frequency of current producing it. B) how frequently a magnet dips in and out of the coil. C) the number of loops in the coil.
Conservation of ___________ is observed in all interactions
a. baryon number b. lepton number c. strangeness d. charm e. beauty