The red line in the helium spectrum is closer to orange than the red line in the hydrogen spectrum, indicating that it has a higher frequency. Therefore, the photons of red light emitted by helium have __________ energy than those emitted by hydrogen
a. lower b. higher
c. the same d. more ionization
b
Physics & Space Science
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Like other solid bodies in the solar system, Earth's surface was kept molten by:
A) radioactivity. B) differentiation. C) convection. D) bombardment by small bodies. E) the solar nebula.
Physics & Space Science
An electron beam directed through a magnetic field
A) may be deflected. B) may experience a force. C) both of these D) neither of these
Physics & Space Science
Describe some characteristics that all the planets seem to share and use the solar nebula theory to explain them
What will be an ideal response?
Physics & Space Science
Approximately how many times does an average human heart beat in a lifetime?
A) 3 × 1011 B) 3 × 1010 C) 3 × 109 D) 3 × 108 E) 4 × 107
Physics & Space Science