A(n) ____ is a collection of 105 to 106 stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than 109 years old and mostly yellow and red stars
a. Herbig Haro object
b. globular cluster
c. open cluster
d. giant cluster
e. supernova
B
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What is the rms current for an 8.0 ?F capacitor attached to a 120 V rms 60 Hz source?
A. 2.8 A B. 1.4 A C. 0.72 A D. 0.36 A E. 0.18 A
During the time that latent heat is involved in a change of state:
A. the temperature does not change B. the substance always expands C. a chemical reaction takes place D. molecular activity remains constant E. kinetic energy changes into potential energy
What is the primary effect the carbon dioxide in Venus' atmosphere has on the planet
What will be an ideal response?
The peak strength in a precipitation-hardened alloy occurs when
(a) The alloy is quenched. (b) The precipitate is coherent. (c) The precipitate changes from coherent to incoherent. (d) The precipitate is incoherent.