What are the three main atmospheric lifting mechanisms?
What will be an ideal response?
Answer: Convectional lifting due to the unequal heating of Earth's surface. Orographic lifting as an air mass is pushed up over an obstacle such as a mountain range. Frontal lifting where two different air masses converge and one is pushed up over the other.
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A cable is 100 m long, has a cross-sectional area of 1.0 mm2, and is made of a material having a Young's modulus of 1.0 × 1011 N/m2. If a 1000-N force is applied to stretch the cable, how far does it stretch?
A) 0.0010 m B) 0.010 m C) 0.10 m D) 1.0 m E) 10 m
A charge of +3.0 ?C is distributed uniformly along the circumference of a circle with a radius of 20 cm. How much external energy is required to bring a charge of 25?C from infinity to the center of the circle?
A. 5.4 J B. 3.4 J C. 4.3 J D. 2.7 J E. 6.8 J
How do scientists determine the age of the solar system?
A) radiometric dating of the oldest Earth rocks B) radiometric dating of meteorites C) radiometric dating of Moon rocks D) Theoretical calculations tell us how long it has taken the planets to evolve to their present forms.
Suppose that the build-up of fatty tissue on the wall of an artery decreased the radius by 10%. By how much would the pressure provided by the heart have to be increased to maintain a constant blood flow?
A) 48% B) 52% C) 50% D) 46% E) 54%