Simple Harmonic Motion: A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What are the (a) maximum speed and (b) maximum acceleration of the tip of the needle?
What will be an ideal response?
(a) 20.3 cm/s (b) 326 cm/s2
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How many time constants must elapse if an initially charged capacitor is to discharge 55% of its stored energy through a resistor?
a. 0.60 b. 0.46 c. 0.52 d. 0.40 e. 1.1
The period of oscillation of a near-Earth satellite (neglecting atmospheric effects) is 84.3 min. What is the period of a near-Moon satellite? (RE = 6.37 × 10^6 m; RM = 1.74 × 10^6 m; ME = 5.98 × 10^24 kg; MM = 7.36 × 10^22 kg.)
a. 6.03 × 10^?3 min. b. 0.713 min. c. 84.3 min. d. 108 min. e. 140 min.
How can the big bang still be found even though you may not be able to see it with your eyes? In what band of the electromagnetic spectrum has it been detected?
What will be an ideal response?