Which of the following cannot be determined from the spectrum of a star?
a. chemical composition
b. surface temperature
c. radial (along line of sight) velocity
d. tangential (perpendicular to line of sight) velocity
e. radial (along line of sight) velocity
d
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Because more massive stars have more gravitational energy, they can fuse heavier nuclear fuels
Indicate whether the statement is true or false
An electron is moving with speed 21. m/s
(a) What is its deBroglie wavelength? (b) What Diffraction Grating spacing between slits would give a 1st order maximum at 30.0°?
The kinetic energy of the bob on a simple pendulum swinging in simple harmonic motion has its maximum value when the displacement from equilibrium is at what point in its swing?
a. zero displacement b. 1/4 the amplitude c. 1/2 the amplitude d. equal the amplitude
Hubble's law is the major basis for the concept that the universe is
a. static. b. evaporating. c. contracting. d. expanding.