If the mass per nucleon in atomic nuclei varied as shown in the fictitious plot above, then nuclear energy would be available from the element iron (atomic no. 26) by the process of nuclear
1) fission.
2) fusion.
3) both.
4) neither.
Accordingly, krypton (atomic no. 36) would yield energy by nuclear
5) fission.
6) fusion.
7) both.
8) neither.
9) not enough information to say.
Answer: 4, 8
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Which of the following describes an experiment that demonstrates that light is a wave?
A) If you let light pass through a narrow "slit" formed by your fingers, you can detect the energy transfer as the light passes through your fingers. B) If you let light pass through a narrow "slit" formed by your fingers, you can see an interference pattern. C) If you allow light from a transparency projector to hit a small container full of water placed in front of the projector, you can detect an energy transfer as the light enters the water. D) a mystical experiment in which the instructor pulls a cosmic toad out of a baseball cap. E) If you allow light from a transparency projector to hit a small container full of water placed in front of the projector, you can see an interference pattern in the water.
The "surface" of a black hole is known as the _______________
a. core b. corona c. photosphere d. event horizon
Energy Levels: What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n = 8 jumps to the final state n = 2? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 205 nm B. 104 nm C. 389 nm D. 486 nm E. 610 nm
The star Vega has an absolute magnitude of about 4 and an apparent magnitude of about 0. Based on the definitions of absolute and apparent magnitude, we can conclude that
A) Vega is nearer than 10 parsecs from Earth. B) Vega has a parallax angle of 1/10 arcsecond. C) Vega's luminosity is less than that of our Sun. D) Vega's surface temperature is cooler than the Sun.