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A certain loudspeaker system emits sound isotropically with a frequency of 2290 Hz and an intensity of 0.795 mW/m2 at a distance of 5.43 m. Assume that there are no reflections. (a) What is the intensity (in mW/m^2) at 29.5 m? At 5.43 m, what are (b) the displacement amplitude and (c) the pressure amplitude of the sound? Take the speed of sound to be 343 m/s and the density of air to be 1.21 kg/m3.
A long solenoid with 9.28 turns/cm and a radius of 7.85 cm carries a current of 15.8 mA. What is the magnitude of the magnetic field there
A football is kicked at ground level with a speed of 15.0 m/s at an angle of 37.0° to the horizontal. How much later does it hit the ground
A microscope has an objective lens with a focal length of 12.0 mm. A small object is placed 0.8 mm beyond the focal point of the objective lens. What is the magnification of the real image
A Norwich MCE student is involved in a crucial out of class experiment. He is in his dorm room 34 feet above an historic rock wall. Describe the final result and state any assumptions that you need to make. Would the final result be any different o..
A 121-kg horizontal platform is a uniform disk of radius 1.63 m and can rotate about the vertical axis through its center. Find the moment of inertia of this system
Burning a pound of coal produces about 13,000 Btu of energy. How many megajoules of energy are produced by burning 4 pounds of coal?
You are driving your car over a circular-shaped bump in the road that has a radius of curvature of 76.9 m. What is the maximum speed that you can drive the car over the top of the bump without losing contact with the road
At room temperature, identical gas cylinders contain 10 moles of nitrogen gas and argon gas respectively. determine the ratio of energies stored in the two systems. Assume ideal gas behavior.
q1. a car with a mass 1865 kg is travelling west and slows down uniformly to 8.5 ms over a distance of 108 m. calculate
a 1.5 kg block is held against a spring of force constant 18516 N/m compressing it a distance of 180 cm. How fast is the block moving after it is release
In the school cafeteria, a trouble-making child blows a 10.0 g spitball through a 30.0 cm straw. what is the speed of the spitball as it leaves the straw
Two kg of propane are initially saturated liquid at 0 C. It undergoes an isentropic process that cools it to -40C. What is the volume after the cooling
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