An air bubble underwater has the same pressure as that of the surrounding water. As the air bubble rises toward the surface (and its temperature remains constant), the volume of the air bubble
A) increases.
B) decreases.
C) remains constant.
D) increases or decreases, depending on the rate it rises.
A
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A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N, what is the wavelength (in cm) of the first harmonic?
A. 600 B. 400 C. 800 D. 1000 E. 200
A 0.30-?F capacitor is connected to a 400-V battery. What potential energy is stored in the capacitor?
a. 1.3 × 10^?3 J b. 6.0 × 10^?4 J c. 4.8 J d. 0.024 J e. 0.048 J
What reason did Hubbert have to think that the normal curve would describe the production of oil? Would the Hubbert description apply to a natural resource such as coal in addition to oil? Why or why not?
What will be an ideal response?
When water of mass m and specific heat c is heated from absolute temperature T1 to absolute temperature T2, its change in entropy is
a. cm ln(T2/T1) b. cm (T2/T1) c. cm (T2 - T1)/T1 d. cm (T2 - T1)/T2 e. cm (T2 - T1)/(T2 + T1)