A lamp uses a 150. W bulb. If it is used at 120. V, what current does it draw and what is its resistance?
What will be an ideal response?
1.25 A; 96.0 ?
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Of the following which might NOT vanish over one cycle of a cyclic process?
A. the change in the internal energy of the substance B. the change in pressure of the substance C. the work done by the substance D. the change in the volume of the substance E. the change in the temperature of the substance
State the Constancy fo the Speed of Light postulate of special relativity
What will be an ideal response?
The color of a firework comes from the glowing of
A) molecules. B) atoms. C) gun powder. D) laser light.
Cosmological redshift is the result of
A) the high speeds at which galaxies move within clusters. B) the expansion of the universe. C) old, red stars in distant galaxies. D) supermassive black holes.