If a volume of air is warmed, it expands. If a volume of air expands, it
A) warms.
B) cools.
C) neither warms nor cools.
Answer: B
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An air-filled parallel-plate capacitor is constructed with a plate area of 0.40 m2 and a plate separation of 0.10 mm
It is then charged to a potential difference of 12 V? (?0 = 8.85 × 10-12 C2/N ? m2 ) (a) How much charge is stored on each of its plates? (b) How much energy is stored in it?
A metal wire has a resistance of 25.00 W under room temperature conditions of 25°C. When the wire is heated to 85°C the resistance increases by 1.95 W. What is the temperature coefficient of resistivity of this metal?
a. 1.3 × 10^-3 (°C)-1 c. 5.0 × 10^-4 (°C)-1 b. 1.5 × 10^-3 (°C)-1 d. 2.5 × 10^-3 (°C)-1
If the universe is accelerating, it will expand forever
Indicate whether the statement is true or false