An organ pipe open at both ends has a radius of 4.0 cm and a length of 6.0 m. What is the frequency (in Hz) of the third harmonic? (Assume the velocity of sound is 344 m/s.)
a. 76
b. 86
c. 54
d. 28
e. 129
B
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In an RLC circuit, the resistance is 10. ohms, the capacitive reactance is 30. ohms, and the inductive reactance is 50. ohms. What is the circuit impedance?
A) 10. ? B) 22. ? C) 90. ? D) 63. ? E) 81. ?
A resistor and an inductor are connected in series to a battery. The battery is suddenly removed from the circuit. The time constant for of the circuit represents the time required for the current to decrease to
A) 25% of the original value. B) 37% of the original value. C) 50% of the original value. D) 63% of the original value. E) 75% of the original value.
A player throws a football 50.0 m at 61.0° north of west. What is the westward component of the displacement of the football?
A) 64.7m B) 55.0 m C) 0.00 m D) 74.0 m E) 24.2 m
Velocity: Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. How long does it take for them to meet?
Fill in the blank(s) with the appropriate word(s).