The mixing of light of all visible colors results in ________ light.
A. white
B. visible
C. Sun
D. spectral
E. brown
Answer: A
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Phase Angles: An series circuit consists of an ac voltage source, a resistor of resistance 810 ?, and an inductor. (There is no capacitance in the circuit.) The current amplitude is 0.40 A, and the phase angle between the source voltage and the current has magnitude 11°. (a) Does the source voltage lag or lead the current?(b) What is the voltage amplitude of the source?
What will be an ideal response?
If you place a plane mirror vertically into water, and a dolphin moves toward it with a speed of 4 m/s, she will see her image move toward her at a relative speed of
A) 6. m/s. B) 10. m/s. C) 2. m/s. D) 4. m/s. E) 8. m/s.
You can safely hold your fingers on both sides of a candle flame due mainly to
A) conduction. B) convection. C) radiation. D) none of the above
Imagine a Star Wars type spaceship in orbit around a planet. Its engine suffers a severe malfunction, and explodes. What is the most physically realistic depiction of this event?
A) The spacecraft burns up in a giant ?reball. B) The spacecraft breaks apart, and the pieces continue to orbit the planet. C) The spacecraft breaks in half and begins to sink down into the planet, like a sinking aircraft carrier.