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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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%
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.
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