University:
California State University, Northridge
Course:
PHYS 100A | General Physics I
Academic year:

2005
Views:

316

Pages:

1
Author:

obratnoj4w0

Quiz 6 1) You are a passenger on a spaceship. As the speed of the spaceship increases, you would observe A) your watch slowing down. B) your watch speeding up. C) your watch losing time. D) nothing unusual about your watch. Answer: D 2) A spacesh ip, traveling at 0.100c away from a stationary enemy station, shoots a projectile towards the station, with a speed of 0.560c relative to the spaceship. What is the speed of the projectile relative to the station? A) 0.460c B) 0.487c C) 0.492c D) 0.660c Answer: B 3) Two spaceships approach Earth from opposite directions. One has a speed of 0.21c and the other a speed of 0.34 c, both relative to Earth. What is the speed of one spaceship relative to the other? A) 0.51 c B) 0.55 c C) 0.58 c D) 0.61 c Answer: A 4) At what speed is the mass of an electron double its rest mass? A) 0.500c B) 0.707c C) 0.866c D) 0.960c Answer: C 5) What is the wavelength in the Balmer series corresponding to a value of n = 15? A) 277.1 nm B) 371.1 nm C) 188.6 nm D) 754.2 nm Answer: B 6) An electron in the hydrogen atom has a wavelength of 2.67 nm. To what state of the hydrogen atom does this electron belong? A) n = 2 B) n = 5 C) n = 8 D) n = 11 Answer: C 7) What is the radius of the smallest Bohr orbit? A) 2.14 × 10- 9 m B) 1.12 × 10-9 m C) 3.17 × 10-11 m D) 5.29 × 10- 11 m Answer: D