A proton with a kinetic energy of 0.20 keV follows a circular path in a region where the magnetic field is uniform and has a magnitude of 60 mT. What is the radius of this path?
a. 4.1 cm
b. 2.9 cm
c. 3.4 cm
d. 5.1 cm
e. 2.4 cm
C
Physics & Space Science
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The smallest unit of life that can survive and reproduce on its own is a(n):
a. atom b. cell c. molecule d. organ e. population
Physics & Space Science
Compared to noise, musical sounds commonly have
A) periodic tones. B) musical notes. C) both of these D) neither of these
Physics & Space Science
Which of the following devices use lasers?
a. DVD players b. fiber optics communication systems c. photocopiers d. UPC price scanners
Physics & Space Science
The first atomic explosion released approximately 1.0 × 1014 J of energy. How much matter had to be changed into energy to produce this yield?
A) 1.1 g B) 23 g C) 13 g D) 0.45 kg E) 1.1 kg
Physics & Space Science