A flute behaves like a tube open at both ends. If its length is 67.0 cm, and the speed of sound is 340 m/s, what is its fundamental frequency in Hz?
a. 127 Hz
b. 168 Hz
c. 670 Hz
d. 254 Hz
e. 507 Hz
d
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How far away from Earth must one travel to completely be beyond Earth's gravity?
A) to a region above the Earth's atmosphere B) to a region well beyond the Moon C) to a region beyond the solar system D) forget it; you can't travel far enough
Consider a flat steel plate with a hole through its center. When the plate's temperature is decreased, the hole will
A) contract only if it takes up more than half the plate's surface area. B) expand if it takes up less than half the plate's surface area. C) contract. D) expand.
A 5.0 ?C charge is placed at the 0 cm mark of a meter stick and a -4.0 ?C charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?
A) 1.4 m from the 0 cm mark B) 2.5 m from the 0 cm mark C) 2.9 m from the 0 cm mark D) 3.3 m from the 0 cm mark E) 4.7 m from the 0 cm mark
What is the total mass of the Earth's atmosphere? The radius of the Earth is 6.4 × 10^6 m, and 1 atm = 1.01 × 10^5 N/m2
a. 5.3 × 10^16 kg b. 1.1 × 10^18 kg c. 5.3 × 10^18 kg d. 1.1 × 10^20 kg e. 5.3 × 10^9 kg