Hypernovae are
a. supernovae that occur when two red dwarfs collide.
b. supernovae that occur when 10 solar mass stars explode.
c. supernovae that occur when stars more massive than 25 solar masses explode.
d. one theory to explain the production of gamma ray bursters.
e. both c and d above
E
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In order to determine the mass of a planet by applying Newton's laws of motion and gravity, the planet must have:
A) rings. B) moons. C) a solid surface. D) a known size and distance from Earth. E) planets further from the Sun than itself.
In an LCR series circuit, if the AC frequency is decreased to a very small value, what value does the magnitude of the angle between the current and voltage phasors approach?
a. 90° c. 0° b. 180° d. 45°
A mass of 1.53 kg is attached to a spring and the system is undergoing simple harmonic oscillations with a frequency of 1.95 Hz and an amplitude of 7.50 cm
What is the speed of the mass when it is 3.00 cm from its equilibrium position? A) 0.0368 m/s B) 0.551 m/s C) 0.421 m/s D) 0.842 m/s E) 0.919 m/s
RC Circuits: A 1.0-?F capacitor is charged until it acquires a potential difference of 900.0 V across its plates, and then the emf source is removed. If the capacitor is then discharged through a 500.0-k? resistance, what is the voltage drop across the capacitor 9.0 ms after beginning the discharge?
A. 880 V B. 920 V C. 16 V D. -16 V