When a proton passes through matter, it is possible for it to interact with the matter in such a way that an electron and a positron are produced; this interaction is referred to as
A)
the photoelectric effect.
B)
the Compton effect.
C)
the de Broglie effect.
D)
pair production.
E)
none of the given answers
D
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When the speed of a wave depends on the wavelength (or frequency), the waves are said to exhibit diffraction
Indicate whether the statement is true or false
A charged particle moves into a region containing both an electric field and a magnetic field. Which of the statements below is/are true?
A. The particle cannot accelerate in the direction of B. B. The path of the particle must be a circle. C. Any change in the particle's kinetic energy is caused by the E field.
1.Only A 2.Only B 3.Only C 4.Both A and B 5.Both A and C 6.Both B and C 7.All are true. 8.None are true.Lobsters live on the bottom of the ocean. Compared with the density of seawater, the density of a lobster is
A) greater. B) the same. C) less.
The noble metals are good electrical and _________conductors.
Fill in the blank(s) with the appropriate word(s).