How are air convection cycles generated?
What will be an ideal response?
Answer: Warm air rises, expands and cools. After the air cools, it sinks to occupy the area left vacant by the rising warm air. This starts and maintains a convection cycle.
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Compare the internal energy of one gram of steam to that of one gram of water if both are at 100°C.
A. The internal energy of the water and steam are the same B. The internal energy of the steam will be higher C. The internal energy of the water will be higher
A parallel-plate capacitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off
As the plates are being separated, the energy stored in this capacitor A) increases. B) decreases. C) does not change. D) become zero.
Two sources of light illuminate a double slit simultaneously. One has wavelength 570 nm and the second has an unknown wavelength. The m = 5 bright fringe of the unknown wavelength overlaps the m = 4 bright fringe of the light of 570 nm wavelength
What is the unknown wavelength? A) 456 nm B) 326 nm C) 380 nm D) 713 nm
A cold trap is set up to cause molecules to linger near the suction in a vacuum system. If the cold trap has an effective volume of 0.200 L and is maintained at 13.0 K,
how many molecules are in it at 10.0 Pa of pressure? (Avogadro's number is 6.022 × 1023 molecules/mol, and the universal gas constant is 8.314 J/mol•K. Assume the behavior of an ideal gas.) A) 1.11 × 1019 molecules B) 1.10 × 1022 molecules C) 7.71 × 1020 molecules D) 7.71 × 1023 molecules