For water droplets to form, what must be present?
a. Smog
b. Hygroscopic nuclei
c. Carbon dioxide
d. Ozone
b
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Escape Speed: How do the escape speeds for two rockets, the first weighing 20 N and the second weighing 20,000 N compare?
A. The escape speed for the lighter rocket is smaller than that for the heavier rocket. B. The escape speed for the lighter rocket is the same as that for the heavier rocket. C. The escape speed for the lighter rocket is greater than that for the heavier rocket.
At what point does the accretion process turn a clump of debris into a planetesimal?
What will be an ideal response?
An LRC series circuit has R = 15.0 ?, L = 25.0 mH, and C = 30.0 ?F. The circuit is connected to a 120-V (rms) ac source with frequency 200 Hz
(a) What is the impedance of the circuit? (b) What is the rms current in the circuit? (c) What is the rms voltage across the resistor? (d) What is the rms voltage across the inductor? (e) What is the rms voltage across the capacitor?
Why is spectral intensity not diminished by the distance from the source of radiation?
What will be an ideal response?