In what way could the Huygens probe be considered a first?
What will be an ideal response?
It made the first successful soft landing on a moon other than Earth's.
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How much of the solar system's total mass is contained in the Sun?
A) about half B) about 90% C) about 95% D) about 99.8% E) exactly 100%
When is/was gravitational contraction an important energy-generation mechanism for the Sun?
A) only during solar minimum B) only during solar maximum C) when the Sun was being formed from a collapsing cloud of gas D) right after the Sun began fusing hydrogen in its core E) when the Sun transports radiation through the convection zone
To increase the room-temperature yield strength of a metal containing dislocations, it is necessary to introduce _________to dislocation motion.
Fill in the blank(s) with the appropriate word(s).
Meters: A galvanometer with a coil resistance of 40.0 ? deflects full scale for a current of 2.0 mA. What series resistance should be used with this galvanometer in order to construct a voltmeter that deflects full scale for 50 V?
A. 25 k? B. 27 k? C. 29 k? D. 31 k?