At Earth's surface what is the direction of the air flow between a high- and low-pressure cell? What is the direction aloft?
At the surface the air flow is from the high- to the low-pressure cell. Aloft the air
flow is from the low- to the high-pressure cell.
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Series Resonance: An ac circuit has a 100-? resistor in series with a 4.9-?F capacitor and a 700-mH inductor. At what frequency does the circuit act like a pure resistance?
A. 0.29 MHz B. 1.9 MHz C. 12 MHz D. 0.54 kHz E. 86 Hz
Before beach sand becomes rock it must be _______.
What will be an ideal response?
Greenhouse gasses include
a. water vapor. b. CO2. c. CO. d. methane.
A particle (charge = Q) is kept in a fixed position at point P, and a second particle (charge = q) is released from rest when it is a distance R from P. If Q = +2.0 mC, q = ?1.5 mC, and R = 30 cm, what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?
a. 60 kJ b. 45 kJ c. 75 kJ d. 90 kJ e. 230 kJ