Areas near a cold ocean or other cold body of water often experience a 'sea breeze' during the late morning, particularly on warm, sunny days. The process of energy transfer most directly associated with the development of the sea breeze is
1.conduction.
2.convection.
3.radiation.
4.none of these.
2
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Angular Momentum: NASA puts a satellite into space that consists of two small 32-kg balls connected by a 12-m long light cable, as shown in the figure. The entire system is initially rotating at 4.0 rpm about an axis perpendicular to the cable at the center of mass. Motors in each mass reel out more cable so that the masses double their separation to 24 m.(a) What is the final rotational speed (in rpm) of the balls?(b) If the initial rotational kinetic energy of the system was K, what is the final rotational kinetic energy in terms of K?
Fill in the blank(s) with the appropriate word(s).
How long after the Big Bang was the Planck time, before which our current theories are completely unable to describe conditions in the universe?
A) 10-10 second B) 10-35 second C) 10-43 second D) 3 minutes E) 300,000 years
Angular Momentum: A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg ? m2. If he pulls in his arms so his moment of inertia decreases to 1.80 kg ? m2, what will be his new angular speed?
A. 2.25 rad/s B. 4.60 rad/s C. 6.25 rad/s D. 0.81 rad/s
On a Hertzsprung-Russell diagram, where would we find white dwarfs?
A) upper right B) lower right C) upper left D) v left