Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 4 sin (5x) cos (6t) where x is in m and t is in s. What is the approximate frequency of the interfering waves?
a. 3 Hz
b. 1 Hz
c. 6 Hz
d. 12 Hz
e. 5 Hz
b
Physics & Space Science
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Time Dilation: A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, Andrea rides on a spaceship that travels away from Earth at a speed of 0.60c for 10 years (as measured by Courtney). At the end of the trip, Courtney is 20 years old. How old is Andrea?
A. 10 years B. 12 years C. 18 years D. 20 years
Physics & Space Science
What direct evidence has been obtained for the existence of dark matter in galaxy clusters?
What will be an ideal response?
Physics & Space Science
If the speed of light through an unknown liquid is measured at 1.78 × 10^8 m/s, what is the index of refraction of this liquid? (c = 3.00 × 10^8 m/s)
a. 0.593 b. 1.69 c. 2.84 d. 1.30 e. 1.59
Physics & Space Science
Is solubility a function of temperature? Explain
Physics & Space Science