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A test tone used on a radio has a frequency of 969 Hz. What is the wavelength of this sound in air at normal room temperature (20 oC)? Record your answer to three decimal places.
a jet engine suspended beneath the wing of an airplane. The weight of the engine is 11800 N, find the magnitude of the torque due to the weight
A converging lens with a diameter of 30.0 cm forms an image of a satellite passing overhead. what is the altitude of the satellite
An 8.0 kilogram cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 10.0 m/s. Find the translational kinetic energy of its center of gravity
Two large, parallel, conducting plates are 17 cm apart and have charges of equal magnitudeand opposite sign on their facing surfaces. What is the potential difference between the plates
Two pieces of steel wire with identical cross sections have lengths of L and 2L. what is the frequency of the second harmonic in the longer wire
define what is the unknown capacitance. what focal length eyepiece should she use.
A subatomic particle moves during the laboratory at 0.85 . Laboratory experimenters measure its lifetime, from creation to annihilation, to be 2.0. What is the recessional speed of the quasar as gauged by astronomers in the other galaxy?
a 10kg sign hangs from two wires. one wire makes an angle of 45 degrees and the other makes a 30 degree angle. what is
Calculate the specific heat of a metal from the following data. A container made of the metal has a mass of 3.1 kg and contains 16 kg of water
If a parallel mirror He-Ne laser had a homogeneous line shape with v=1.5GHz, and small signal peak coefficient of .001/cm length=100cm and reflectance's 100 percent and 97 percent, how many longitudinal modes would initially contribute to the laser o..
A projectile is fired at v0 = 394.0 m/s at an angle of ? = 63.6o with respect to the horizontal. How far will the projectile travel in the horizontal direction
Sau-Lan has a mass of 52 kg. She rides the up escalator at Ocean Park in Hong Kong. This is the world’s longest escalator, by a length of 227 m and an average inclination of 31°. How much work does the escalator do on Sau-Lan?
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