Dispersing light from a hot, low-pressure gas gives a spectrum of the type known as (two words) ______________ ______________
Fill in the blank(s) with correct word
line emission
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In the larger clusters, colliding galaxies tend to pass through one another
Indicate whether the statement is true or false
If the period of a pendulum is tripled, then by factor is the length of the string increased?
a. 3 b. 6 c. 9 d. 1/3
During a reaction, a reactant loses 4.8 × 10-28 kg of mass. How many joules of energy are released? (c = 3.0 × 108 m/s)
A) 4.3 × 10-11 J B) 1.4 × 10-19 J C) 1.6 × 10-36 J D) 5.3 × 10-45 J
Based on the figure in the Introduction, and the fact that an object with an increasing moment of inertia will spin more slowly to conserve angular momentum, choose the figure that best depicts how a cloud of gas will collapse to form a star system.
Choose one: A. round clouds, big to little B. horizontal clouds, big to little C. diagonal clouds, big to little