In a mass spectrometer, a singly-charged particle (charge e) has a speed of 1.0 × 106 m/s and enters a uniform magnetic field of 0.20 T
The radius of the circular orbit of the particle is 0.020 m. What is the mass of this particle? (e = 1.60 × 10-19 C)
A) 3.2 × 10-28 kg
B) 6.4 × 10-28 kg
C) 1.7 × 10-27 kg
D) 4.5 × 10-27 kg
E) 3.1 × 10-31 kg
B
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At the instant a 2.0-kg particle has a velocity of 4.0 m/s in the positive x direction, a 3.0-kg particle has a velocity of 5.0 m/s in the positive y direction. What is the speed of the center of mass of the two-particle system?
a. 3.8 m/s b. 3.4 m/s c. 5.0 m/s d. 4.4 m/s e. 4.6 m/s
The units T•m2/s are equivalent to:
a. V. c. W. b. N/m. d. webers.
Artificially induced radioactive elements generally have
A) long half-lives. B) short half-lives. C) no half-lives.
The person who first explained the blackbody spectrum was
a. Max Planck. b. Albert Einstein. c. Neils Bohr. d. Erwin Schrödinger. e. Werner Heisenberg.