Consider a pipe of length L that is open at both ends. What are the wavelengths of the three lowest-pitch tones produced by this pipe?
A) 4L, 2L, L
B) 2L, L, L/2
C) 2L, L, 2L/3
D) 4L, 4L/3, 4L/5
C
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A vertically polarized beam of light of intensity 100 W/m2 passes through a polarizer with its transmission axis at 40.0° to the vertical. What is the transmitted intensity of this beam of light?
A) 100 W/m2 B) 0 W/m2 C) 25.0 W/m2 D) 44.4 W/m2 E) 58.7 W/m2
Which of the following stars is a luminous red supergiant and is classified M2 Ia?
A) Spica B) Betelgeuse C) Pollux D) Miaplacidus
Uniform Circular Motion: A race car traveling at a constant speed of 50 m/s drives around a circular track that is 500 m in diameter. What is the magnitude of the acceleration of the car?
A. 0 m/s2 B. 1.0 m/s2 C. 10 m/s2 D. 0.63 m/s2 E. 2.2 m/s2
Match the star's position at points 1, 2, 3, and 4 in the plot with the descriptions below.
a) headed straight toward Earth b) headed straight away from Earth c) closest to Earth d) farthest from Earth