Pencil lead is made of ________.
A. graphite
B. galena
C. coal
D. gypsum
E. lead
Answer: A
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Which of the following pr°Cesses can generate the convective instability ass°Ciated with severe thunderstorms and tornadoes?
A. forcing a layer of moist air to descend a mountain range B. creating shadows on the land surface C. heating the upper portion of an unsaturated layer of air D. lifting a stable air layer whose surface is humid and whose top is dry
A cannon recoils from firing a cannonball. The speed of the cannon's recoil is small because the
A) force against the cannon is smaller than against the ball. B) momentum is mainly concentrated in the ball. C) cannon has more mass than the ball. D) momentum of the cannon is smaller.
Explain the difference between density, concentration, and pattern
What will be an ideal response?
During coalescence, the percentage of colliding droplets that join together is called the:
A) droplet collection coefficient. B) coalescence efficiency. C) rain potential efficiency. D) coalescence condensation collection factor. E) none of the above