Large circulation patterns in the Sun, dubbed "Conveyor Belts," transport material from the equator to the poles, then back to the equator at a depth of 300,000 km, take how long to complete a cycle?
A) Less than a day
B) A few years
C) A few decades
D) A few centuries
E) Tens of millions of years, comparable to the convection cycle in Earth's mantle
C
You might also like to view...
The precision and number of significant figures in 1.003 km is
A. precision = .0001 km, significant figure = 4. B. precision = .001 km, significant figure = 4. C. precision = .0001 km, significant figure = 3. D. precision = .001 km, significant figure = 3. E. precision = .0001 km, significant figure = 2.
Slanting Surfaces With Friction: A 6.0-kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic friction is 0.40, at what rate does the box accelerate down the slope?
A. 3.1 m/s2 B. 3.4 m/s2 C. 3.7 m/s2 D. 4.1 m/s2
A car is able to stop in a distance d. Assuming the same braking force, what distance does this car require to stop when it is traveling twice as fast?
A) d B) 2 d C) d D) 4 d E) 2 d
What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.60) is 25°?
a. 40° c. 43° b. 25° d. 16°