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
Hubble's law is the major basis for the concept that the universe is
a. static. b. evaporating. c. contracting. d. expanding.
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
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°?