Multiple Choice
Particle accelerators: The voltage across the dees of a cyclotron is 30,000 V. How many revolutions do the protons go through in reaching a kinetic energy of 21 MeV? (1 eV = 1.60 × 10-19 J, e = 1.60 × 10-19 C, mproton = 1.67 × 10-27 kg)
A) 2.0 million
B) 1400
C) 700
D) 350
E) 35
Correct Answer:
Verified
Correct Answer:
Verified
Q49: Hubble's law: The H<sub>α</sub> spectral line of
Q50: Conservation laws: Consider the decay π<sup>o</sup> →
Q51: Particles: How many different kinds of leptons
Q52: Conservation laws: Consider the decay π<sup>+</sup>→ μ<sup>+</sup>
Q53: Quarks: Composite particles that are composed of
Q54: Quarks: What is the quark composition of
Q55: Cosmology: The background microwave radiation, discovered in
Q56: Conservation laws: Which one of the following
Q58: Quarks: Consider the negative pion, π-.<br>(a) What
Q59: Cosmology: Dark energy was discovered as astronomers