Leaving a hot oven door open in a closed room on a cool day
A) decreases room temperature.
B) increases room temperature.
C) doesn't affect room temperature.
Answer: B
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Compared to the buoyant force of the atmosphere on a 1-kilogram iron block, the buoyant force on a nearby 1-kilogram helium-filled balloon is
A) considerably less. B) considerably more. C) the same.
A string with a fixed frequency vibrator at one end is subjected to varying tensions. When the tension is 20 N, a resonance with 3 antinodes results. What tension would cause a resonance with 2 antinodes in this string?
A. 30 N B. 45 N C. 80 N D. 8.9 N E. 13 N
What is the difference between parallel and counter flow?
What will be an ideal response?
The solar magnetic field is strongest in those regions called ________, which are poles and usually thus occur in pairs
Fill in the blank(s) with correct word