The wave properties of light limit the resolution of
A. Microscopes and telescopes
B. Only microscopes
C. Only telescopes
D. No optical instruments.
Answer: A. Microscopes and telescopes
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Mass on a Spring: When a 0.350-kg package is attached to a vertical spring and lowered slowly, the spring stretches 12.0 cm. The package is now displaced from its equilibrium position and undergoes simple harmonic oscillations when released. What is the period of the oscillations?
A. 0.695 s B. 0.483 s C. 0.286 s D. 0.0769 s E. 1.44 s
Twelve seconds after starting from rest, a freely-falling cantelope has a speed of
A) 10 m/s. B) 50 m/s. C) 100 m/s. D) more than 100 m/s.
If the voltage across a resistor is doubled, the current will
a. remain the same. b. be cut to one-fourth. c. be cut in half. d. be doubled. e. be quadrupled.
The figure shows a steady electric current passing through a wire with a narrow region. What happens to the drift velocity of the moving charges as they go from region A to region B and then to region C?
A) The drift velocity decreases from A to B and increases from B to C. B) The drift velocity increases all the time. C) The drift velocity remains constant. D) The drift velocity decreases all the time. E) The drift velocity increases from A to B and decreases from B to C.