Fusion reactions happen at a slower rate in bigger stars than in smaller ones.
a. true
b. false
b. false
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Sometimes a flashlight filament glows red instead of white, which indicates a lowness of
A) current in the filament. B) filament temperature. C) both of these D) neither of these
In a wind tunnel the pressure on the top surface of a model airplane wing is 8.8 × 104 N/m and the pressure on the bottom surface is 9.0 × 104 N/m2. If the area of the top and bottom surfaces of each wing is 2.0 m2, what is the total lift on the model airplane?
A. 2.0 × 103 N B. 8.0 × 103 N C. 1.6 × 104 N D. 3.6 × 104 N E. 1.0 × 103 N
A 1.5-H inductor is connected in series with a 200-? resistor through an ideal 15-V dc power supply and an open switch. After closing the, what is the maximum energy that will be contained in the inductor?
A) 3.2 mJ B) 1.2 mJ C) 5.2 mJ D) 2.2 mJ E) 4.2 mJ
In an isochoric process where the pressure increases from to , does the internal energy of the system increase or decrease and does the temperature increase or decrease?
a. The internal energy increases and the temperature decreases. b. The internal energy increases and the temperature increases. c. The internal energy decreases and the temperature decreases. d. The internal energy decreases and the temperature increases.