The lines in the visible region of the hydrogen spectrum arise from transitions from higher levels back to the level where n equals
a. 3.
b. 1.
c. 2.
d. 4.
c
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Spectroscopy of a star can reveal its temperature, composition, and line-of-sight motion
Indicate whether the statement is true or false
A camera is designed to bring light into focus (to form an image) on its
A) detector. B) shutter. C) lens.
Elastic Collisions: A block of mass m = 3.6 kg, moving on a frictionless surface with a speed vi = 9.3 m/s, makes a sudden perfectly elastic collision with a stationary block of mass M, as shown in the figure. Just after the collision, the 3.6-kg block recoils with a speed of vf = 2.7 m/s. What is the speed V of the other block?
A. 6.6 m/s B. 8.0 m/s C. 9.3 m/s D. 10.7 m/s E. 12.0 m/s
A planet has mass M = 8.00 × 10^23 kg. At what distance will the centripetal acceleration of an orbiting space station be equal to the gravitational acceleration on Earth's surface? (G = 6.67 × 10^–11 m3·kg–1·s–1)
a. 2.33 × 10^6 m b. 5.44 × 10^12 m c. 5.23 × 10^14 m d. 1.18 × 10^35 m