In music the 3rd harmonic is which overtone?
A) 4th
B) 2nd
C) 1st
D) 3rd
E) 5th
B
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The orbital period of a geosynchronous satellite is
A) 23 hours 56 minutes. B) 24 hours. C) 365.25 days. D) 12 years. E) 26,000 years.
The 500-m-long spaceship Springbrake is at rest on the planet Hitest for refueling. Another spaceship, Summerbrake, passes parallel to Springbrake at 0.600c. The crew on Springbrake measure the length of Summerbrake as it passes and find that the length they measure is exactly the same as the known 500-m rest length of Springbrake. If Summerbrake were at rest next to Springbrake, its length would then be measured to be
A. 180 m. B. 320 m. C. 500 m. D. 625 m. E. 781 m.
The howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 8.9 km. Assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 W/m2
A juvenile howler monkey has an acoustic output of 63 µW. What is the ratio of the acoustic intensity produced by the juvenile howler to the reference intensity I0, at a distance of 210 m? A) 110 B) 230 C) 76 D) 170 E) 300
What is Right-Hand Rule used to determine?
a) Given the directions of the magnetic field and the velocity of a charged particle, it is used to find the direction of the magnetic force on the particle. b) Given the directions of the magnetic field and magnetic force on a charged particle, it is used to determine the magnitude and sign of charge on the particle. c) Given the magnitude and sign of the charge on a particle and the direction of the magnetic force, it is used to determine the net force on the particle. d) It is used to determine the direction of the "reaction force" when applying Newton's third law of motion to the particle.