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A train whistle has a certain acoustic power. If the sound energy from the whistle spreads out spherically, and the intensity level is measured to be 90 Db at a distance of 200 meter from the train, determine what is the power of the whistle?
A stone is tied to a string (length =0.950 meter) and whirled in a circle at the same constant speed in two different ways. Evaluate what is the speed of the stone
A football player runs from his own goal line to the opposing team's goal line, returning to the fifty-yard line, all in 22.8 s. Compute his average speed. Compute the magnitude of his average velocity.
A sphere of radius 10m and a mass of 5kg is rotated from restto achieve a rotational speed of 20 rad/sec in 10 secs? What is the angular acceleration of this sphere
The first-order principal maximum produced by a grating is located at an angle of ? = 11.6 degrees. What is the angle for the third-order maximum with the same light
a planet with a radius of 6.00 x 10^7 m has a gravitational field of magnitude 30.0 m/s2 at the surface. what is the escape speed from the planet
a lawn roller is pushed across a lawn by a force of 115newtonsalong the direction of the handle, which is22.5o above the horizontal. what distance is the roller pushed
Speedboat A negotiates a curve whose radius is 118 m. Speedboat B negotiates a curve whose radius is 270 m. Each boat experiences the equivalent centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
Analog data having highest harmonic at 30 kHz generated by a sensor has been digitized using 6 level PCM
You buy a plastic dart gun, and being a clever physics student youdecide to do a quick calculation to find its maximum horizontal range. What is the maximum horizontal range of your gun
when a person visits the local tanning salon they absorb photons of ultraviolet light uv to get the desired tan. what
A man is pulling his box that has a mass of 22 kg. What is the work done on the luggage by the lady, What is the power exerted on the box by the man
When a battery is connected to the plates of a 6.00-µF capacitor, it stores a charge of 108.0 µC. What is the voltage of the battery? If the same capacitor is connected to another battery and 90.0 µC of charge is stored on the capacitor, what is ..
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