Order the following objects in increasing size (radius):
A) neutron star, white dwarf, Jupiter, Sun B) neutron star, Jupiter, white dwarf, Sun
C) Jupiter, white dwarf, neutron star, Sun D) Jupiter, white dwarf, Sun, neutron star
A
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Resistance and Resistivity: The length of a certain wire is doubled and at the same time its radius is reduced by a factor of 2. What is the new resistance of this wire?
A. It is 2 times as large. B. It is 4 times as large. C. It is 6 times as large. D. It it 8 times as large. E. It is ½ as large.
What is the mass-to-light ratio for the inner region of the Milky Way Galaxy, in units of solar masses per solar luminosity?
A) 1,000 B) 600 C) 100 D) 6 E) 0.1
When does hydrogen first begin to fuse into helium in the star formation process?
A) when the cloud first begins to contract B) when the thermal pressure is trapped at the center of the cloud C) when the protostars undergoes convective contraction D) when the protostar undergoes radiative contraction E) only when the star reaches the main-sequence
A hockey puck slides off the edge of a horizontal platform with an initial velocity of 20 m/s horizontally and experiences no significant air resistance. The height of the platform above the ground is 2.0 m
What is the magnitude of the vertical component of the velocity of the puck just before it hits the ground? A) 20 m/s B) 6.3 m/s C) 13 m/s D) 15 m/s E) 21 m/s