Which statement best describes a neutron star's formation as a supernova explodes and the core begins to collapse inward?
a. neutrinos and antineutrinos combine into neutrons
b. electrons and protons combine into neutrons and neutrinos
c. electrons and protons combine into neutrons and neutrinos
d. electrons and positrons combine into neutrons and neutrinos
e. protons and antiprotons combine into neutrons and neutrinos
b
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Spectral Series: What is the shortest wavelength of the Lyman series?
A. 91.16 nm B. 45.60 nm C. 121.5 nm D. 204.1 nm E. 365 nm
A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.0 rad/sec2 acquires an angular velocity of 5.0 rad/sec. The CD continues rotating at 5.0 rad/sec for 15 seconds and then slows to a stop in 12.0 second with a constant angular deceleration. What is the angular distance traveled by a point 4.0 cm from the center, at the time 2.0 seconds from the start?
A. 2.0 rad B. 4.0 rad C. 6.0 rad D. 8.0 rad E. 10.0 rad
Which of the following has NOT yet been observed in space?
A) formaldehyde B) methyl alcohol C) DNA D) ammonia E) hydrogen cyanide
The heat of fusion of ice is 80. kcal/kg-C°. When 50. g of ice at 0°C is added to 50. g of water at 25°C, what is the final temperature?
What will be an ideal response?