The four visible colors emitted by hydrogen atoms are produced by electrons:
a. that start in the ground state.
c. that end up in the level with n = 2.
b. that end up in the ground state.
d. that start in the level with n = 2.
C
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Star A and star B have the same apparent magnitude. Star A is twice as distant as star B. Therefore, star A has twice the luminosity as star B
Indicate whether the statement is true or false
Star A has a radius of 200 000 km and a surface temperature of 6 000 K. Star B has a radius of 400 000 km and a surface temperature of 3 000 K. The emissivity of both stars is the same. What is the ratio of the rate of energy radiated by Star A to that of Star B?
Fissioning an iron nucleus would occur with
A) absorption of energy. B) release of energy. C) neither absorption nor release of energy
Determine the resonant frequency of the circuit.
A. 159 Hz B. 32 Hz C. 5 Hz D. 500 Hz E. 79.5 Hz