A Hydrogen atom is excited to the n = 11 level. Its decay to the n = 7 level is detected in a photographic plate. What is the wavelength of the detected emission?
A) 7,510 nm
B) 4,670 nm
C) 12,400 nm
D) 4,380 nm
A
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A boat floating in a large pool is loaded with solid iron bars. The water level at the pool's edge is marked with a red line. The iron is now thrown overboard. When the water becomes calm again,
A. the red line is slightly lower than the water level. B. the red line is still at the water level. C. the red line is slightly higher than the water level.
A magnetic field of 2.00 T is applied to a bubble chamber to make the tracks of protons and other charged particles identifiable by the radius of the circles they move in. If a high-energy proton moves along an arc of a 3.30-m circle, what is the momentum of the proton? [q = 1.60 × 10?19 C, m = 1.67 × 10?27 kg]
What will be an ideal response?
A hoop, a solid sphere, and a solid cylinder each have the same mass, radius, and initial speed and are going up the same inclined plane. Which one goes the farthest?
a. the hoop b. the sphere c. the cylinder d. All go the same distance.
A book is moved once around the perimeter of a tabletop with the dimensions 1.0 m × 2.0 m. If the book ends up at its original position, what is its displacement and what is the distance it traveled?
1.displacement of 0 m, distance traveled 0 m 2.displacement of 0 m, distance traveled 6 m 3.displacement of 6 m, distance traveled 6 m 4.displacement of 6 m, distance traveled 0 m