What is meant by draft?
What will be an ideal response?
Draft is the negative pressure created when a hot gas rises, as in a chimney,
where a high velocity stream of gases occurs. The high velocity gases results in a
lower pressure, or draft.
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One of the leaders in promoting good outdoor lighting
A. Circadian Rhythm
B. Glare
C. Vincent Van Gogh
D. International Dark-Sky Association
E. Shielding
F. Sky Glow
__________is a graph of orbital velocity versus radius in the disk of a galaxy
A) A rotation curve B) A normal distribution C) The H-R diagram D) The light curve
What unit is used to measure wavelengths?
a. arc second b. photons c. degrees d. nanometer e. pixels
Consider an ideal solenoid of length L, N windings, and radius b (L is much longer than b). A current I is flowing through the wire windings
If the radius of the solenoid is doubled to 2b, but all the other quantities remain the same, the magnetic field inside the solenoid will A) remain the same. B) become twice as strong as initially. C) become one-half as strong as initially. D) become four times as strong as initially. E) become one-fourth as strong as initially.