A(n) ____________________ is the sudden expulsion of the outer layers of a moderate mass star that has a dormant carbon core
Fill in the blank(s) with correct word
planetary nebula
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A source emits sound at a fixed constant frequency f.If the source moves away from you, the frequency you hear is lower than f
a. True b. False Indicate whether the statement is true or false
A mass of 0.40 kg, attached to a spring with a spring constant of 40 N/m, is set into simple harmonic motion. What is the magnitude of the acceleration of the mass when at its maximum displacement of 0.25 m from the equilibrium position?
a. zero b. 13 m/s2 c. 6.3 m/s2 d. 25 m/s2 e. 50 m/s2
At a particular instant, an electron moves toward the east in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it is
A) zero. B) upward. C) toward the north. D) toward the south. E) downward.
An air conditioning unit is vibrating in simple harmonic motion with a period of 0.27 s and a range (from the maximum in one direction to the maximum in the other) of 3.0 cm. At t = 0 it is at its central position and moving in the +x direction
What is its position when t = 55 s? A) x = -0.430 cm B) x = -0.511 cm C) x = 0.511 cm D) x = -1.41 cm E) x = -1.44 cm