The beam of electrons that hits the screen of an oscilloscope is moved up and down by:
a. varying the electron's charge.
b. electrical charges on deflecting plates above and below the beam.
c. gravity.
d. a phosphorescent coating.
B
Physics & Space Science
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A child on a playground swings through a total of 32 degrees. If the displacement is equal on each side of the equilibrium position, what is the amplitude of this vibration?
a. 32 b. 16 c. 64
Physics & Space Science
A traffic light weighing 100 N is supported by two ropes as shown in the figure. The tensions in the ropes are closest to
A) 50 N. B) 56 N. C) 63 N. D) 66 N. E) 83 N.
Physics & Space Science
Why is ultraviolet light not transmitted by glass?
What will be an ideal response?
Physics & Space Science
In the early 1900s, the scientist named __________ revived the idea of continental drift
a. Alfred Wegener b. Harry Hess c. Andrija Mohorovicic d. None of the above
Physics & Space Science