In an RLC series circuit, if the AC frequency is increased to a very large value, what value does the phase angle between the current and voltage approach?
a. 90°
b. 0°
c. –90°
d. 45°
a
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The ____ is responsible for binding the electrons to the nucleus
a. Kirchhoff's law b. ground state c. temperature d. Coulomb force e. Balmer series
What happens to the visible light radiated by stars located within a dusty gas cloud?
A) It is absorbed by dust, which heats the dust grains so that they emit the absorbed energy as infrared light. B) It is blocked by dust and its energy is thereby lost. C) It is reflected by dust back to the star from whence it came. D) It passes through the cloud unaffected.
A sealed cylinder fitted with a movable piston contains ideal gas at 27°C, pressure 0.500 × 105 Pa, and volume 1.25 m3
What will be the final temperature if the gas is compressed to 0.800 m3 and the pressure rises to 0.820 × 105 Pa? A) 42°C B) 68°C C) 130°C D) 250°C E) 150°C
Many of the world's larger deserts are the result of
A) warm ocean currents. B) extremely high temperatures. C) strong prevailing northwesterly winds. D) belts of high atmospheric pressure.