What range of electromagnetic radiation is emitted when transitions from higher levels into n = 1 occur in a hydrogen atom?
A) Visible
B) Infrared
C) Microwave
D) X-Ray
E) Ultraviolet
E
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The instability strip is above the main sequence on the H-R diagram
Indicate whether the statement is true or false
A brass rod, 75.0 cm long and having a cross-sectional area of 2.50 cm2, conducts heat from a large furnace at 375°C into a very large cold water bath at 10.0°C without losing any heat at the lateral surface of the rod
Steady state has been established, and the thermal conductivity of brass is 109 W/m?K. The rate at which the entropy of the system (furnace plus water) is changing is closest to A) 6.74 × 10-2 W/K. B) 2.64 × 10-2 W/K. C) 2.05 × 10-2 W/K. D) 3.54 × 10-2 W/K. E) 4.69 × 10-2 W/K.
Dispersion occurs when:
a. a material changes some frequencies more than others. b. a material slows down some wavelengths more than others. c. some materials bend light more than other materials. d. light has different speeds in different materials.
A cylinder rotating about its axis with a constant angular acceleration of 1.6 rad/s2 starts from rest at t = 0 . At the instant when it has turned through 0.40 radian, what is the magnitude of the total linear acceleration of a point on the rim (radius = 13 cm)?
a. 0.31 m/s2 b. 0.27 m/s2 c. 0.35 m/s2 d. 0.39 m/s2 e. 0.45 m/s2