Compared to the amount of current that flows from a battery and into a circuit, the amount of current that returns to the battery is
A) less.
B) the same.
C) greater.
D) dependent on the internal resistance of the battery.
Answer: B
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The theory proposing light as a particle is supported by
1.the sparks created in Hertz' experiment with the spark gap oscillator. 2.the speed of light turning up in Maxwell's equations. 3.the interference caused by light in Young's double slit experiment. 4.the photoelectric effect Hertz discovered.
In Fizeau's experiment to measure the speed of light, the wheel has 475 notches and rotates with a speed of 55.0 rev/sec. Light passing through one notch travels to the mirror and back just in time to pass through the next notch
If the distance between the wheel and the mirror is 8800 m, how much time does it take the wheel to rotate from one notch to the next? A) 11.9 s B) 24.8 s C) 3.83 × 10-5 s D) 7.44 × 10-5 s E) 8.44 × 10-5 s
The Earth's orbit is closest to the Sun in January and farthest from the Sun in July. When is the Earth moving the slowest in orbit?
a. Neither January nor July since the orbital speed of the Earth is a constant. b. January c. July d. This occurs twice a year, in April and in October.
We have observed a comet strike Jupiter
Indicate whether the statement is true or false