Two continuous waves having the same wavelength and amplitude pass through the same medium. They are aligned crest to crest and trough to trough so that they interfere. The resulting wave has
A) the same wavelength and the same amplitude.
B) twice the wavelength and twice the amplitude.
C) zero amplitude.
D) twice the wavelength and the same amplitude (or height) as each of the individual waves.
E) the same wavelength and twice the amplitude.
E
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Neglecting air resistance, how fast must you toss a ball straight up in order for it to take 6 seconds to return to its initial level?
A) 5 m/s B) 10 m/s C) 20 m/s D) 30 m/s E) more than 30 m/s
If it takes 8.0 N to stretch a spring 6.0 cm, and if the spring is then cut in half, what force does it take to stretch one of the halves 3.0 cm?
a. 2.0 N c. 8.0 N b. 4.0 N d. 16 N
Fusing two iron nuclei would occur with
A) absorption of energy. B) release of energy. C) neither of these
Spherical Mirrors: Suppose you place an object in front of a concave mirror. Which of the following statements must be true? (There could be more than one correct choice.)
A. The image of the object will always be smaller than the object. B. No matter where you place the object, a real image of the object will be formed. C. The image of the object will always be inverted. D. If you position the object between the mirror and the focal point of the mirror, its image must be upright and virtual. E. No matter where you place the object, the image of the object will always be virtual and upright.