A 4.0-g string is 0.36 m long and is under tension. The string vibrates at 500 Hz in its third harmonic. What is the wavelength of the standing wave in the string?
A) 0.24 m
B) 0.36 m
C) 0.54 m
D) 0.72 m
E) 0.90 m
A
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A mouse is running away from a cat at 0.75 m/s and, at 1.25 m from his mouse hole, he accelerates at a constant rate until he reaches his hole safely, 0.75 s later. What acceleration did he undergo during the final 1.25 m of his escape?
A. 1.8 
B. 1.2
C. 4.8
D. 2.4
E. 6.4
If bits of the coals do not stick to your feet while walking barefoot on red-hot coals, it would be best if your feet are
A) wet. B) dry. C) warm. D) cold. E) very hot.
Jill is farsighted and cannot see objects clearly that are closer to the eye than 80.0 cm. What is the focal length of the contact lenses that will enable her to see objects at a distance of 25.0 cm from her eyes?
A) +36.4 cm B) -36.4 cm C) -21.2 cm D) +21.2 cm E) +32.5 cm
Answer the following statement(s) true (T) or false (F)
A maximally efficient Carnot engine would produce zero power