What is the origin of Io's volcanism?
What will be an ideal response?
A tidal tug-of-war between Io, Jupiter, and Europa (the next moon out).
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A motorist travels for 3.0 h at 80 km/h and 4.0 h at 60 km/h. What is her average speed for the trip?
A) 74 km/h B) 140 km/h C) 70 km/h D) 73 km/h E) 69 km/h
The site from which an airplane takes off is the origin. The x axis points east; the y axis points straight up. The position and velocity vectors of the plane at a later time are given by
?
and
m/s.
?
The plane is most likely
A. just touching down. B. in level flight in the air. C. ascending. D. descending. E. taking off.
Heat Engines: The figure shows a pV diagram for a cycle of a heat engine for which QH = 59 J. What is the thermal efficiency of the engine?
A. 17% B. 34% C. 8.5% D. 14%
An element that tends to gain or share electrons during chemical reactions is classified as a(n) ______________
Fill in the blank(s) with correct word