Which of the following is a true water "wave", as that word is used in physics?
A) Ocean waves coming in to a beach
B) Ripples on the surface of a pond
C) Both of the above.
D) Water flowing down a river
E) All of the above.
B
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The position of a mass that is oscillating on a spring is given by x = (18.3 cm) cos[(2.35 s-1)t]. What is the frequency of this motion?
A) 0.426 Hz B) 1.34 Hz C) 2.67 Hz D) 0.128 Hz E) 0.374 Hz
Which of the following is required for helium fusion as compared to hydrogen fusion?
A) much higher temperature B) much higher density C) a star of much greater mass D) a star that is much older in age
If you hear thunder 5.0 s after seeing a flash of lightning, the distance to the lightning strike is about
A) 2.2 km. B) 0.60 km. C) 1.7 km. D) 0.90 km. E) 1.2 km.
What quantities are plotted on a blackbody radiation curve?
a. total radiated energy vs. temperature b. radiation intensity vs. wavelength c. wavelength of peak emission vs. temperature d. none of the above