An electron in a hydrogen atom makes a transition from the n = 4 to the n = 3 energy state. Determine the energy (in eV) of the emitted photon
a. 0.54
b. 0.66
c. 0.85
d. 1.51
e. 10.2
B
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A chunk of ice (T = -20°C) is added to a thermally insulated container of cold water (T = 0°C). What happens in the container?
A) The ice melts until thermal equilibrium is established. B) The water cools down until thermal equilibrium is established. C) Some of the water freezes and the chunk of ice gets larger. D) none of the above
Asteroid Ida was photographed by the Galileo spacecraft in 1993, and the photograph revealed that the asteroid has a small moon, which has been named Dactyl
From the dimensions of Ida and its general features, one can estimate the mass of Ida to be 4.5 × 1016 kg, and the distance between Dactyl and Ida is approximately 90 km. Assuming a circular orbit, what would be the orbital speed of Dactyl? (G = 6.67 × 10-11 N ? m2/kg2 ) A) 2.9 m/s B) 5.8 m/s C) 30 m/s D) 11 m/s E) 2.3 m/s
According to Newton's Third Law, "action" and "reaction" forces must always act on the same object
Indicate whether the statement is true or false
Is the Chernobyl accident an advertisement for passive reactor safety features? Explain
What will be an ideal response?